Open-hole gravel packing sand prevention process and open-hole gravel packing sand prevention service pipe string
阅读说明：本技术 一种裸眼砾石充填防砂工艺及裸眼砾石充填防砂服务管柱 (Open-hole gravel packing sand prevention process and open-hole gravel packing sand prevention service pipe string ) 是由 杨国 阎新颖 陶风 王琼 王璞 王慧 张健 朱向斌 刘书欣 于 2020-07-01 设计创作，主要内容包括：本发明涉及一种裸眼砾石充填防砂工艺及裸眼砾石充填防砂服务管柱,属油气井井下作业技术领域.本发明的裸眼砾石充填防砂服务管柱包括内管柱和外管柱,内管柱由依次连接的坐封工具、分流阀、密封短接、静压测试塞、流动短接、反循环单流阀、负荷指示器、冲管和抛光管构成；外管柱由依次连接的顶部封隔器、上延伸筒、充填滑套、下延伸筒A、负荷显示接箍、下延伸筒B、快速接头、筛管和双阀浮鞋构成；本发明通过内管柱和外管柱的一次下入,可进行管柱充填、反循环、酸洗作业,作业过程中,管柱的上提、下放通过负荷指示器7进行定位,具有操作简单,效果显著的特点,具有积极的推广意义。(The invention relates to a naked-eye gravel packing sand prevention process and a naked-eye gravel packing sand prevention service string, belonging to the technical field of downhole operation of oil and gas wells, wherein the naked-eye gravel packing sand prevention service string comprises an inner string and an outer string, wherein the inner string consists of a setting tool, a shunt valve, a sealing short circuit, a static pressure test plug, a flow short circuit, a reverse circulation check valve, a load indicator, a flushing pipe and a polishing pipe which are sequentially connected; the outer pipe column consists of a top packer, an upper extension barrel, a filling sliding sleeve, a lower extension barrel A, a load display coupling, a lower extension barrel B, a quick joint, a sieve pipe and a double-valve float shoe which are connected in sequence; the invention can carry out the operations of filling, reverse circulation and acid washing of the pipe column by one-time running of the inner pipe column and the outer pipe column, and the lifting and the lowering of the pipe column are positioned by the load indicator 7 in the operation process, thereby having the characteristics of simple operation and remarkable effect and having positive popularization significance.)
1. The open-hole gravel packing sand control process is characterized in that: it comprises the following steps;
1) firstly, connecting and assembling an open-hole gravel packing sand control service string, wherein the open-hole gravel packing sand control service string comprises an inner string and an outer string, and the inner string consists of a setting tool (1), a shunt valve (2), a sealing short circuit (3), a static pressure test plug (4), a flow short circuit (5), a reverse circulation check valve (6), a load indicator (7), a flushing pipe (8) and a polishing pipe (9) which are sequentially connected; the outer pipe column consists of a top packer (10), an upper extension barrel (11), a filling sliding sleeve (12), a lower extension barrel A (13), a load display coupling (14), a lower extension barrel B (15), a quick joint (16), a sieve pipe (17) and a double-valve float shoe (18) which are connected in sequence;
2) the outer pipe column is lowered to a preset position in the well through the oil pipe, the outer pipe column is fixed through the well mouth, the inner pipe column is lowered into the outer pipe column through the oil pipe, then the oil pipe is pressed from the well mouth, so that positive cycle testing is carried out on the inner pipe column and the outer pipe column, and mud in the outer pipe column is removed;
3) 1.75in of copper balls are thrown into the inner pipe column, after the copper balls fall to a ball seat on the setting tool (1), the copper balls are pressed through an oil pipe to push a piston (1-9) of the setting tool (1) to move, and then the piston (1-9) pushes a top packer (10) to set the packer;
4) after the top packer (10) is set, the oil pipe is continuously pressed, the setting tool (1) is released, the ball seat is set, and the copper ball falls to a lower ball seat (4-9) on the static pressure test plug (4); continuously pressurizing the oil pipe, testing the downward movement of the plug (4-7) and the limiting ring (4-11), and then pressing the top packer (10) from the casing to test whether the setting is qualified or not,
5) when the seal is tested, the pipe column is lifted up, the elastic sleeve (6-2) on the reverse circulation check valve (6) is stressed to move downwards, the reverse circulation check valve (6) is closed, then the pipe column is pressed down to a seal testing position and is positioned by the load indicator (7), after the seal is tested to be qualified, the pipe is pressed continuously, the bursting sheet (6-14) on the reverse circulation check valve (6) is pressed and broken, the lower ball seat (4-9) and the sliding sleeve (4-8) move downwards, the hole on the sliding sleeve (4-8) is closed, and the side channel of the static pressure test plug (4) is opened; the middle small flow passage of the reverse circulation check valve (6) is opened,
6) lifting and then pressing down the pipe column, opening a filling sliding sleeve (12) through an elastic sleeve (6-2) on the reverse circulation check valve (6), continuously pressing down the pipe column, opening a channel of the reverse circulation check valve (6), lowering the pipe column to a filling position, pumping filling liquid into the oil pipe, and performing filling operation;
7) after the filling is finished, lifting the pipe column, pumping liquid into the casing pipe for reverse circulation operation, so as to wash redundant gravel in the oil pipe out of the shaft;
8) after the reverse circulation operation is finished, the pipe column is continuously lifted to the acid washing position, then the steel ball is thrown into the ball seat of the flow divider valve (2), the oil pipe is pressed, the bypass sleeve (2-4) of the flow divider valve (2) moves downwards, acid washing liquid is pumped into the oil pipe, and the acid washing operation is carried out on the tool;
9) after the acid washing operation is finished, pulling out the inner pipe column and the outer pipe column; completing the sand control operation of open hole gravel packing; the invention can carry out the operations of filling, reverse circulation and acid washing of the pipe column by one-time running of the inner pipe column and the outer pipe column, and the lifting and the lowering of the pipe column are positioned by the load indicator (7) in the operation process, thereby having the characteristics of simple operation and remarkable effect.
2. The open-hole gravel pack sand control process of claim 1, wherein: the setting tool (1) comprises a mandrel (1-1), a setting component (1-3), a bushing component (1-20) and a release component (1-27), wherein an inner hole of the mandrel (1-1) is a stepped hole, an upper pressure transmission hole (1-2) is formed in the mandrel (1-1), the setting component (1-3) is sleeved at the top end of the mandrel (1-1), the setting component (1-3) is connected with the mandrel (1-1) in a key mode, the release component (1-27) is sleeved at the bottom end of the mandrel (1-1), the release component (1-27) is connected with the mandrel (1-1) in a threaded mode, and the bushing component (1-20) is sleeved in a top end port of the mandrel (1-1).
3. The open-hole gravel pack sand control process of claim 2, wherein: the setting assembly (1-3) is composed of an upper joint (1-4), an upper ball seat (1-5), a sealing ring (1-6), an upper pressure cap (1-7), a piston (1-8), an outer sleeve (1-9), an extension cylinder (1-10), a sliding sleeve (1-11), a lower pressure cap (1-12) and a locking assembly (1-13), wherein the upper ball seat (1-5) is installed on the upper joint (1-4) through internal threads, the sealing ring (1-6) is sleeved on the upper joint (1-4), the outer sleeve (1-9) is installed on the upper joint (1-4) below the sealing ring (1-6) through threads, and the upper pressure cap (1-7) is installed on the top end of the outer sleeve (1-9) through threads; a piston (1-8) is slidably mounted between the outer sleeve (1-9) and the upper joint (1-4), an extension cylinder (1-10) is sleeved on the mandrel (1-1) below the piston (1-8), the extension cylinder (1-10) is connected with the mandrel (1-1) through a shear pin, a locking component (1-13) is sleeved in a bottom end port of the extension cylinder (1-10), a sliding sleeve (1-11) is sleeved on the extension cylinder (1-10) above the locking component (1-13), the sliding sleeve (1-11) is connected with the extension cylinder (1-10) through the shear pin, and a lower pressing cap (1-12) is mounted on the top end thread of the sliding sleeve (1-11); the locking assembly (1-13) is composed of a locking seat (1-14), limiting pins (1-15), an installation ring (1-16), locking raised heads (1-17) and springs (1-18), wherein the locking seat (1-14) is inserted with a plurality of limiting pins (1-15), the installation ring (1-16) is sleeved in the locking seat (1-14) below the limiting pins (1-15), the locking seat (1-14) above the installation ring (1-16) is internally provided with a plurality of locking raised heads (1-17), the locking raised heads (1-17) are in a convex shape, and the top ends of the locking raised heads (1-17) are provided with limiting grooves (1-19); the bottom ends of the locking projections (1-17) are connected with the mounting rings (1-16) through springs (1-18), and the top ends of the locking projections (1-17) extend out of the locking seats (1-14).
4. The open-hole gravel pack sand control process of claim 2, wherein: the bushing assembly comprises a sealing short section (1-21), an upper release ring (1-22), an inner ball seat (1-23), a lower release ring (1-24) and a limiting ring (1-25), wherein the top end of the sealing short section (1-21) is sleeved with the upper release ring (1-22), the upper release ring (1-22) is connected with the sealing short section (1-21) through a shearing pin, the limiting ring (1-25) is installed on an internal thread of a port at the bottom end of the sealing short section (1-21), an inner ball seat (1-23) is installed in the sealing short section (1-21), a lower release ring (1-24) is installed in the sealing short section (1-21) below the inner ball seat (1-23), the lower release ring (1-24) is connected with the sealing short section (1-21) through the shearing pin, the inner hole of the sealing short section (1-21) is a stepped hole, and a lower pressure transmission hole (1-26) is formed in the sealing short section (1-21); the release assembly (1-27) is composed of a sleeve (1-28), a push cylinder (1-29), an inner ratchet wheel (1-30), an outer ratchet wheel (1-31), a sliding support ring (1-32), a support ring pressing cap (1-33), a slip (1-34), a snap spring (1-35), a slip sleeve (1-36), a positioning joint (1-37), a lower ball seat (1-38) and a lower joint (1-39), wherein the sleeve (1-28) is sleeved at the top end of the push cylinder (1-29), the sleeve (1-28) is connected with the push cylinder (1-29) through a shearing pin, the inner ratchet wheel (1-30) is installed on an internal thread of a bottom end port of the push cylinder (1-29), the outer ratchet wheel (1-31) is installed on the inner ratchet wheel (1-30) in an engaged manner, the outer ratchet wheel (1-31) is connected with the inner ratchet wheel (1-30) through a shearing pin, a sliding support ring (1-32) is sleeved on the mandrel (1-1) below the outer ratchet wheel (1-31), a plurality of support flanges are arranged on the sliding support ring (1-32) at intervals, the sliding support ring (1-32) is connected with the mandrel (1-1) through the shearing pin, a support ring pressing cap (1-33) is installed at the top end of the sliding support ring (1-32) in a threaded manner, a slip (1-34) is sleeved on the sliding support ring (1-32) below the support ring pressing cap (1-33), a slip sheet (1-35) is clamped in the slip (1-34), a slip sleeve (1-36) is sleeved on the slip (1-34), a positioning joint (1-37) is installed between the slip sleeve (1-36) and the mandrel (1-1) in a threaded manner, the lower ball seats (1-38) are arranged in the positioning joints (1-37) through internal threads, and the lower joints (1-39) are arranged at the bottom ends of the lower ball seats (1-38) through threads.
5. The open-hole gravel pack sand control process of claim 1, wherein: the flow divider (2) in the step 1) is composed of an upper joint (2-1), a lower joint (2-2), an intermediate joint (2-3) and a bypass sleeve (2-4), wherein an upper joint is arranged at one end of the intermediate joint (2-3) through threads, a bypass sleeve (2-4) is arranged at the other end of the intermediate joint (2-3) through threads, a lower joint (2-2) is arranged at the end of the bypass sleeve (2-4) through threads, a vulcanized sealing element (2-5) is arranged between the lower joint (2-2) and the bypass sleeve (2-4), a set screw is arranged between the intermediate joint (2-3) and the upper joint (2-1) for circumferential limiting, bypass holes are formed in the circumference of the bypass sleeve (2-4), and a ball seat (2-6) is arranged in the bypass sleeve (2-4), the central hole of the bypass ball seat (2-6) is a conical hole, and the bypass ball seat (2-6) is provided with a liquid flow hole (2-7).
6. The open-hole gravel pack sand control process of claim 1, wherein: the static pressure test plug (4) in the step 1) is composed of a middle sealing cylinder (4-1), a perforated pipe (4-2) and a lower extension cylinder (4-3), wherein one end of the middle sealing cylinder (4-1) is provided with the perforated pipe (4-2) in a threaded manner, and a ball seat (4-4) is arranged in a port internal thread of the perforated pipe (4-2); a lower extension cylinder (4-3) is installed at the other end of the middle sealing cylinder (4-1) in a threaded manner, and vulcanization sealing elements (4-5) are respectively arranged between the middle sealing cylinder (4-1) and the perforated pipe (4-2) as well as between the lower extension cylinder (4-3); a test plug (4-7) is arranged in the middle sealing cylinder (4-1) through a support (4-6), a lower ball seat (4-9) is arranged in the middle sealing cylinder (4-1) at one side of the support (4-6) through a sliding sleeve (4-8) in a threaded manner, a release ring (4-10) is arranged at the end of a perforated pipe (4-2) in the middle sealing cylinder (4-1) through a fastening screw, and the lower ball seat (4-9) is connected with the release ring (4-10) through a shearing pin; the end of the test plug (4-7) is provided with a limit ring (4-11) through a set screw, a shear pin is arranged between the support (4-6) and the test plug (4-7), and the circumferences of the sliding sleeve (4-8) and the perforated pipe (4-2) are respectively provided with a liquid flow hole.
7. The open-hole gravel pack sand control process of claim 1, wherein: the reverse circulation check valve (6) in the step 1) is composed of a bypass valve opening mechanism and a reverse circulation mechanism, and is characterized in that: the bypass valve opening mechanism comprises an upper sleeve (6-1), an elastic sleeve (6-2), a middle joint a (6-3), a sliding sleeve (6-4), a bottom elastic claw (6-5), a bypass sleeve (6-6), a sealing ring (6-18), an upper joint (6-19), a lower joint (6-20), a set screw (6-21), a spacer ring (6-22) and a locking cap (6-23); the reverse circulation mechanism comprises a flow joint (6-7), a middle joint b (6-8), a spring (6-9), a flow short joint (6-10), a cross joint (6-11), an upper sealing joint (6-12), a lower sealing joint (6-13), a rupture disk (6-14), a C-shaped ring (6-15), a sealing valve seat (6-16), a cross sleeve (6-17) and an upper cross joint (6-24); the upper sleeve (6-1) is sleeved with an elastic sleeve (6-2), and the upper sleeve (6-1) is used for constructing an internal liquid flow channel and supporting the elastic sleeve (6-2); the right end of the elastic sleeve (6-2) is provided with a sliding sleeve (6-4) through an intermediate joint a (6-3), the right end of the sliding sleeve (6-4) is provided with a bottom elastic claw (6-5), and the sliding sleeve (6-4) is limited and positioned through the bottom elastic claw (6-5); the upper sleeve (6-1) is provided with a bypass sleeve (6-6) through a sealing ring, and the bypass sleeve (6-6) forms a positive circulation channel; the bypass sleeve (6-6) corresponds to the sliding sleeve (6-4); the sliding sleeve (6-4) is matched with the elastic sleeve (6-2) to open or close a bypass hole of the bypass sleeve (6-6); one end of the flow joint (6-7) is connected with a flow short circuit (6-10) through an intermediate joint b (6-8) and a spring (6-9), and the flow short circuit (6-10) is connected with a cross joint (6-11); the other end of the flow joint (6-7) is connected with an upper sealing joint (6-12) through a sealing ring, and the upper sealing joint (6-12) forms the isolation of an inner flow passage and an outer flow passage.
8. The open-hole gravel pack sand control process of claim 7, wherein: the upper sealing joint (6-12) is connected with a lower sealing joint (6-13) through a sealing ring, and the lower sealing joint (6-13) and a sealing valve seat (6-16) form sealing of an inner flow passage hole; a rupture disk (6-14) is arranged between the upper sealing joint (6-12) and the lower sealing joint (6-13) through a sealing ring; the rupture disc (6-14) is used for checking the sealing performance of a rubber cylinder of the top packer (10), the large-diameter end of the flow joint (6-7) is connected with the upper joint (6-19), the small-diameter end of the flow joint (6-7) is installed on the sealing valve seat (6-16) through the C-shaped ring (6-15) and the sealing ring, the C-shaped ring (6-15) is used for limiting and positioning the sealing valve seat (6-16), and the sealing valve seat (6-16) is fixedly installed with the lower joint (6-20); the cross sleeves (6-17) are mounted on the flow joints (6-7), the cross sleeves (6-17) are used for supporting and centering the flow joints (6-7), and the sealing rings (6-18) are matched with the sealing rings to seal channels of bypass holes of the bypass sleeves (6-6).
9. The open-hole gravel pack sand control process of claim 1, wherein: step 12), filling the sliding sleeve (12) by an outer sleeve (12-1), an upper joint (12-2) and a sealing cylinder (12-3), wherein one end of the outer sleeve (12-1) is provided with the upper joint (12-2) by a thread, and the end of the upper joint (12-2) is provided with the sealing cylinder (12-3) by a thread; an inner sliding sleeve (12-4) is movably arranged in the outer sleeve (12-1) through a retainer ring, and through holes (12-5) are uniformly distributed on the circumferences of the inner sliding sleeve (12-4) and the corresponding outer sleeve (12-1).
10. The open-hole gravel pack sand control process of claim 1, wherein: step 12) forming a double-valve float shoe (18) of the outer pipe column by a lower valve seat (18-1), an upper connector (18-2) and a guide shoe (18-3), wherein one end of the lower valve seat (18-1) is provided with the upper connector (18-2) in a threaded manner, a lower valve seat central hole (18-4) is formed in the lower valve seat (18-1), an upper check valve (18-5) is movably inserted in the lower valve seat central hole (18-4), and the upper check valve (18-5) is abutted to and hermetically connected with the central hole of the upper connector (18-2); a guide shoe (18-3) is installed at the other end of the lower valve seat (18-1) in a threaded mode, a guide shoe center hole (18-7) is formed in the guide shoe (18-3), a lower check valve (18-8) is movably inserted into the guide shoe center hole (18-7), springs (18-12) are sleeved on the upper check valve (18-5) and the lower check valve (18-8) respectively, the springs (18-12) on the upper check valve (18-5) are connected with the upper check valve (18-5) and the lower valve seat (18-1) in an abutting mode respectively, and the springs (18-12) on the lower check valve (18-8) are connected with the lower check valve (18-8) and the guide shoe (18-3) in an abutting mode respectively; the lower check valve (18-8) is connected with the central hole of the lower valve seat (18-1) in an abutting and sealing way; the guide shoes (18-3) are uniformly provided with main flow channels (18-9), and the main flow channels (18-9) are intermittently communicated with the central hole (18-4) of the lower valve seat through lower check valves (18-8); an annular groove (18-10) is arranged on the circumference of the guide shoe (18-3), a lateral flow hole (18-11) is arranged on the annular groove (18-10) and corresponds to the main flow passage (18-9), and the lateral flow hole (18-11) is communicated with the main flow passage (18-9); liquid flow channels (18-6) are uniformly distributed on the lower valve seat (18-1), the liquid flow channels (18-6) are communicated with a central hole (18-4) of the lower valve seat, and the liquid flow channels (18-6) are intermittently communicated with a central hole of the upper joint (18-2) through an upper check valve (18-5); the side flow holes (18-11) are arranged in an inclined manner, and the diameter of the side flow holes (18-11) is smaller than that of the main flow passage (18-9).
Technical Field
The invention relates to a bare hole gravel packing sand prevention process and a bare hole gravel packing sand prevention service pipe column, belonging to the technical field of downhole operation of oil and gas wells.
Background
At present, the completion modes of a plurality of deep wells and high-yield wells are mostly open hole completion, because the open hole completion can maximize the productivity of oil reservoirs, and the open hole completion has the characteristics of large exposed area, high yield, low completion cost and narrow adaptability, is only suitable for a single oil-gas layer with stable stratum, and cannot be selectively acidized or fractured and the like. With the continuous improvement and maturity of drilling technology, horizontal wells occupy more and more important positions in the oil field development process. Wells with a maximum well angle approaching or reaching 90 ° and a certain horizontal displacement are often referred to as horizontal wells. Oil and gas well sand production is one of the important problems encountered in oil exploitation. If sand damage can not be controlled, sand production of oil wells and gas wells is more and more serious, so that the sand production oil wells and gas wells can not be effectively developed. On one hand, the open-hole gravel packing completion of the horizontal well can effectively keep the stability of the well hole, and meanwhile, an obvious sand control effect can be achieved. When the conventional open-hole gravel packing completion tool is used for replacing mud, filling and pickling, two times of pipe columns are needed, the setting tool is generally mechanically set, and the operations of replacing mud, filling and pickling can be completed in sequence only by performing backwashing operation, so that the operation is complex, the cost is high, and the improvement is needed continuously.
Disclosure of Invention
The invention aims to: the open hole gravel packing sand control process and the open hole gravel packing sand control service pipe column can ensure that the well wall is stable, backwashing ball operation is not needed, and the operations of replacing mud, packing, breaking gel and the like can be sequentially realized after the pipe column is put into the well.
The technical scheme of the invention is as follows:
the open-hole gravel packing sand control process is characterized in that: it comprises the following steps;
1) firstly, connecting and assembling an open-hole gravel packing sand control service string, wherein the open-hole gravel packing sand control service string comprises an inner string and an outer string, and the inner string consists of a setting tool, a shunt valve, a sealing short joint, a static pressure test plug, a flow short joint, a reverse circulation check valve, a load indicator, a wash pipe and a polishing pipe which are sequentially connected; the outer pipe column consists of a top packer, an upper extension barrel, a filling sliding sleeve, a lower extension barrel A, a load display coupling, a lower extension barrel B, a quick joint, a sieve pipe and a double-valve float shoe which are connected in sequence;
2) the outer pipe column is lowered to a preset position in the well through the oil pipe, the outer pipe column is fixed through the well mouth, the inner pipe column is lowered into the outer pipe column through the oil pipe, then the oil pipe is pressed from the well mouth, so that positive cycle testing is carried out on the inner pipe column and the outer pipe column, and mud in the outer pipe column is removed;
3) 1.75in of copper balls are thrown into the inner pipe column, after the copper balls fall to a ball seat on the setting tool, the copper balls are pressed through an oil pipe to push a piston of the setting tool to move, and a top packer is pushed by the piston to be set;
4) after the top packer is set, continuously pressing the oil pipe, releasing the setting tool, driving the ball seat, and allowing the copper ball to fall to a lower ball seat on the static pressure test plug; continuously pressurizing the oil pipe, testing the downward movement of the plug and the limiting ring, pressing the casing pipe to test whether the setting of the top packer is qualified or not,
5) when the seal is tested, the pipe column is lifted up, the elastic sleeve on the reverse
6) Lifting the tubular column first and then pressing the tubular column downwards, opening the filling sliding sleeve through an elastic sleeve on the reverse circulation check valve, continuously pressing the tubular column downwards, opening a channel of the reverse circulation check valve, lowering the tubular column to a filling position, and pumping filling liquid into the oil pipe to perform filling operation;
7) after filling, lifting the pipe column, pumping liquid into the casing pipe for reverse circulation operation, and washing redundant gravel in the oil pipe out of the shaft;
8) after the reverse circulation operation is finished, the pipe column is continuously lifted to the acid washing position, then the steel ball is thrown into the ball seat of the flow divider, the oil pipe is pressed, the bypass of the flow divider moves downwards, the acid washing liquid is pumped into the oil pipe, and the acid washing operation is carried out on the tool;
9) after the acid washing operation is finished, pulling out the inner pipe column and the outer pipe column; and finishing the sand control operation of open hole gravel packing. The invention can carry out the operations of filling, reverse circulation and acid washing of the pipe column by one-time running of the inner pipe column and the outer pipe column, and the lifting and the lowering of the pipe column are positioned by the load indicator in the operation process, thereby having the characteristics of simple operation and remarkable effect.
The seat of interior tubular column seals the instrument by the dabber, sits and seals subassembly, bush subassembly and release subassembly and constitute, and the hole of dabber is the shoulder hole, is provided with on the dabber and passes the pressure hole, and the top cover of dabber is equipped with sits and seals the subassembly, sits and seals the subassembly and connect with the dabber key-type, and the bottom cover of dabber is equipped with the release subassembly, release subassembly and dabber threaded connection, and the bush subassembly is equipped with in the top port endotheca of dabber.
The setting assembly consists of an upper joint, an upper ball seat, a sealing ring, an upper pressing cap, a piston, an outer sleeve, an extension cylinder, a sliding sleeve, a lower pressing cap and a locking assembly, wherein the upper ball seat is installed on an internal thread of the upper joint; a piston is slidably mounted between the outer sleeve and the upper joint, an extension cylinder is sleeved on the mandrel below the piston and connected with the mandrel through a shearing pin, a locking assembly is sleeved in a bottom end port of the extension cylinder, a sliding sleeve is sleeved on the extension cylinder above the locking assembly and connected with the extension cylinder through the shearing pin, and a pressing cap is mounted on the top end of the sliding sleeve in a threaded mode.
The locking assembly comprises a locking seat, limiting pins, a mounting ring, locking raised heads and springs, wherein the plurality of limiting pins are inserted in the locking seat, the mounting ring is sleeved in the locking seat below the limiting pins, the plurality of locking raised heads are arranged in the locking seat above the mounting ring, the locking raised heads are in a convex shape, and limiting grooves are formed in the top ends of the locking raised heads. The bottom end of the locking raised head is connected with the mounting ring through a spring, and the top end of the locking raised head extends out of the locking seat.
The bushing assembly comprises a sealing short section, an upper release ring, an inner ball seat, a lower release ring and a limiting ring, wherein the upper release ring is sleeved at the top end of the sealing short section and connected with the sealing short section through a shearing pin, the limiting ring is installed in a bottom end port internal thread of the sealing short section, an inner ball seat is installed in the sealing short section in a sleeved mode, the lower release ring is installed in the sealing short section in a sleeved mode below the inner ball seat and connected with the sealing short section through the shearing pin, an inner hole of the sealing short section is a stepped hole, and a lower pressure transmission hole is formed in the sealing short section.
The release component comprises a sleeve, a push barrel, an inner ratchet wheel, an outer ratchet wheel, a sliding support ring, a support ring pressing cap, a slip, a clamping spring piece, a tile sleeve, a positioning joint, a lower ball seat and a lower joint, wherein the sleeve is sleeved at the top end of the push barrel and connected with the push barrel through a shearing pin, the inner ratchet wheel is arranged on an internal thread at the bottom port of the push barrel, the outer ratchet wheel is arranged on the inner ratchet wheel in a meshed mode, the outer ratchet wheel is connected with the inner ratchet wheel through the shearing pin, the sliding support ring is sleeved on a mandrel below the outer ratchet wheel and provided with a plurality of support flanges at intervals, the sliding support ring is connected with the mandrel through the shearing pin, the support ring pressing cap is arranged on the top end of the sliding support ring in a threaded mode, the slip is sleeved on the sliding support ring below the support ring pressing cap, the positioning joint is internally provided with a lower ball seat, and the bottom end of the lower ball seat is provided with a lower joint in a threaded manner.
The flow divider of interior tubular column comprises the top connection, the lower clutch, intermediate head and bypass cover, the top connection is installed to the one end screw thread of intermediate head, the bypass cover is installed to the other end screw thread of intermediate head, the lower clutch is installed to bypass cover tip screw thread, be provided with the vulcanization sealing member between lower clutch and the bypass cover, be provided with holding screw between intermediate head and the top connection, it is spacing to carry out circumference, be provided with the by-pass hole on the circumference of bypass cover, be provided with the bypass ball seat in the bypass cover, the centre bore of bypass ball seat is the bell mouth, be provided with the liquid flow hole on the bypass ball seat.
The static pressure test plug of the inner pipe column consists of a middle sealing cylinder, a perforated pipe and a lower extension cylinder, wherein one end of the middle sealing cylinder is provided with the perforated pipe in a threaded manner, and a ball seat is arranged in an internal thread at the port of the perforated pipe; a lower extension cylinder is installed at the other end of the middle sealing cylinder in a threaded manner, and vulcanization sealing parts are respectively arranged between the middle sealing cylinder and the perforated pipe as well as between the middle sealing cylinder and the lower extension cylinder; a test plug is arranged in the middle sealing cylinder through a support, a lower ball seat is arranged in the middle sealing cylinder at one side of the support through a sliding sleeve thread, a release ring is arranged at the end of a perforated pipe in the middle sealing cylinder through a fastening screw, and the lower ball seat is connected with the release ring through a shearing pin; the test plug end is provided with a limit ring through a set screw, a shearing pin is arranged between the support and the test plug, and the circumferences of the sliding sleeve and the perforated pipe are respectively provided with a liquid flow hole.
The reverse circulation check valve of the inner pipe column is composed of a bypass valve opening mechanism and a reverse circulation mechanism, and is characterized in that: the bypass valve opening mechanism comprises an upper sleeve, an elastic sleeve, a middle joint a, a sliding sleeve, a bottom elastic claw, a bypass sleeve, a sealing ring, an upper joint, a lower joint, a set screw, a spacer ring and a lock cap. The reverse circulation mechanism comprises a flow joint, a middle joint b, a spring, a flow short joint, a cross joint, an upper sealing joint, a lower sealing joint, a rupture disk, a C-shaped ring, a sealing valve seat, a cross sleeve and an upper cross joint.
The upper sleeve is sleeved with an elastic sleeve and used for constructing an internal liquid flow channel and supporting the elastic sleeve.
The right end of the elastic sleeve is connected with a sliding sleeve through an intermediate joint a, the right end of the sliding sleeve is connected with a bottom elastic claw, and the sliding sleeve is limited and positioned through the bottom elastic claw; the upper sleeve is provided with a bypass sleeve through an O-shaped sealing ring, and the bypass sleeve forms a positive circulation channel; the bypass sleeve corresponds to the sliding sleeve; (ii) a The sliding sleeve is matched with the elastic sleeve to open or close a bypass hole of the bypass sleeve; one end of the flow joint is connected with a flow short circuit through an intermediate joint b and a spring, and the flow short circuit is connected with the cross joint; the other end of the flowing joint is connected with an upper sealing joint through an O-shaped sealing ring, and the upper sealing joint forms the isolation of the inner flow passage and the outer flow passage.
The upper sealing joint is connected with a lower sealing joint through an O-shaped sealing ring, and the lower sealing joint and the sealing valve seat form the sealing of the inner runner hole. A rupture disk is arranged between the upper sealing joint and the lower sealing joint through an O-shaped sealing ring; the rupture disc is used for testing the sealing performance of the top packer rubber cylinder; the large-diameter end of the flow joint is connected with the upper joint, the small-diameter end of the flow joint is arranged on the sealing valve seat through a C-shaped ring and an O-shaped sealing ring, the C-shaped ring is used for limiting and positioning the sealing valve seat, and the sealing valve seat and the lower joint are fixedly arranged; the cross sleeve is arranged on the flowing joint and used for supporting and righting the flowing joint, and the sealing ring is matched with the O-shaped sealing ring to seal a channel of a bypass hole of the bypass sleeve.
The filling sliding sleeve 12 consists of an outer sleeve 12-1, an upper joint 12-2 and a sealing barrel 12-3, wherein one end of the outer sleeve is provided with the upper joint in a threaded manner, and the end of the upper joint is provided with the sealing barrel in a threaded manner; the outer sleeve and the inner sleeve are movably provided with an inner sliding sleeve through a retaining ring, and through holes are uniformly distributed on the circumference of the outer sleeve corresponding to the inner sliding sleeve.
The double-valve float shoe of the outer pipe column consists of a lower valve seat, an upper connector and a guide shoe, wherein one end of the lower valve seat is provided with the upper connector in a threaded manner, a lower valve seat central hole is formed in the lower valve seat, an upper check valve is movably inserted in the lower valve seat central hole, and the upper check valve is abutted and hermetically connected with the central hole of the upper connector; the other end of the lower valve seat is provided with a guide shoe in a threaded manner, a guide shoe center hole is formed in the guide shoe, a lower check valve is movably inserted in the guide shoe center hole, springs are sleeved on the upper check valve and the lower check valve respectively, the springs on the upper check valve are connected with the upper check valve and the lower valve seat in an abutting manner respectively, and the springs on the lower check valve are connected with the lower check valve and the guide shoe in an abutting manner respectively. The lower check valve is connected with the central hole of the lower valve seat in an abutting and sealing way; a main flow passage is uniformly distributed on the guide shoe and is intermittently communicated with the central hole of the lower valve seat through a lower check valve; an annular groove is arranged on the circumference of the guide shoe, a lateral flow hole is arranged on the annular groove corresponding to the main flow channel, and the lateral flow hole is communicated with the main flow channel; liquid flow channels are uniformly distributed on the lower valve seat and communicated with the central hole of the lower valve seat, and the liquid flow channels are intermittently communicated with the central hole of the upper connector through the upper check valve. The lateral flow holes are arranged in an inclined shape, and the diameter of each lateral flow hole is smaller than that of the main flow passage.
Compared with the prior art, the invention has the beneficial effects that:
compared with the prior art, the invention has the following advantages:
1. the number of tools for operation is reduced, the specified target is completed by fewer tools, and the tool cost is saved; the running times of the pipe column are reduced, and the operation risk is reduced.
2. The hydrostatic column pressure acts on the stratum in all operation stages, so that the stable and effective sand prevention operation of the well wall is ensured;
3. the operation of backwashing the balls is not needed, so that the labor cost is saved, the operation time and the operation steps are saved, and the operation period is shortened; the efficiency is improved, the functions of replacing mud, filling, acidifying (gel breaking) and the like can be sequentially realized after the pipe column is lowered, the operation is simple, and the effect is obvious.
Drawings
FIG. 1 is a schematic structural view of an outer tubing string of the present invention;
FIG. 2 is a schematic structural view of the inner tubular string of the present invention;
FIG. 3 is a schematic view of the setting tool of the present invention;
FIG. 4 is an enlarged schematic view taken at A in FIG. 3;
FIG. 5 is a schematic cross-sectional view of a setting assembly of the setting tool;
FIG. 6 is an enlarged view of the point B in FIG. 5;
fig. 7 is a schematic view of a locking nose of the setting tool type;
FIG. 8 is a cross-sectional schematic view of a liner assembly of the setting tool;
FIG. 9 is a schematic cross-sectional view of a release assembly of the setting tool;
FIG. 10 is a schematic view of the connection between the setting tool and the top packer
FIG. 11 is a schematic view of a setting tool setting a top packer
FIG. 12 is a schematic view of the setting tool in operation;
FIG. 13 is a schematic view of the release operation of the setting tool;
FIG. 14 is a schematic structural view of a static pressure test plug according to the present invention;
FIG. 15 is a schematic view of an open state of a static pressure test plug according to the present invention;
FIG. 16 is a schematic diagram of the reverse circulation check valve of the present invention;
FIG. 17 is a schematic flow diagram of fluid after the bypass valve of the reverse circulation check valve is closed;
FIG. 18 is a schematic flow diagram of fluid after the bypass valve of the reverse cycle check valve is opened;
FIG. 19 is a schematic view showing the open state of the filling sliding sleeve according to the present invention;
FIG. 20 is a schematic view of a closed state of the filling slide according to the present invention;
FIG. 21 is a schematic view of the open state of the diverter valve of the present invention;
FIG. 22 is a schematic view of the shut-off condition of the diverter valve of the present invention;
FIG. 23 is a schematic structural view of a double-valve float shoe of the present invention;
FIG. 24 is a schematic view of the structure in the direction A-A in FIG. 23;
FIG. 25 is a schematic view of the structure in the direction B-B in FIG. 23;
FIG. 26 is a schematic view of the open position of the dual valve float of the present invention.
In the figure: 1. the device comprises a setting tool 1-1, a mandrel 1-2, an upper pressure transmission hole 1-3, a setting assembly 1-4, an upper joint 1-5, an upper ball seat 1-6, a sealing ring 1-7, an upper pressure cap 1-8, a piston 1-9, an outer sleeve 1-10, an extension cylinder 1-11, a sliding sleeve 1-12, a lower pressure cap 1-13, a locking assembly 1-14, a locking seat 1-15, a limiting pin 1-16, a mounting ring 1-17, a locking raised head 1-18, a spring 1-19, a limiting groove 1-20, a lining assembly 1-21, a sealing short section 1-22, an upper release ring 1-23, an inner ball seat 1-24, a lower release ring 1-25, The device comprises a limiting ring, 1-26 parts, a lower pressure transmission hole, 1-27 parts, a release assembly, 1-28 parts, a sleeve, 1-29 parts, a push cylinder, 1-30 parts, an inner ratchet wheel, 1-31 parts, an outer ratchet wheel, 1-32 parts, a sliding support ring, 1-33 parts, a support ring pressure cap, 1-34 parts, a slip, 1-35 parts, a snap spring, 1-36 parts, a slip sleeve, 1-37 parts, a positioning joint, 1-38 parts, a lower ball seat, 1-39 parts and a lower joint; 2. the bypass valve comprises a flow divider valve, 2-1 parts of an upper joint, 2-2 parts of a lower joint, 2-3 parts of a middle joint, 2-4 parts of a bypass sleeve, 2-5 parts of a vulcanized sealing piece, 2-6 parts of a bypass ball seat; 2-7 parts of a liquid flow hole, 2-8 parts of a communication hole, 3 parts of a sealing short joint, 4 parts of a static pressure test plug, 4-1 parts of a middle sealing cylinder, 4-2 parts of a perforated pipe, 4-3 parts of a lower extension cylinder, 4-4 parts of a ball seat, 4-5 parts of a vulcanized sealing piece, 4-6 parts of a bracket, 4-7 parts of a test plug, 4-8 parts of a sliding sleeve, 4-9 parts of a lower ball seat, 4-10 parts of a release ring, 4-11 parts of a limiting ring; 5. the flow short joint comprises, by weight, 6 parts of a flow short joint, 6 parts of a reverse circulation check valve, 6-1 parts of an upper sleeve, 6-2 parts of an elastic sleeve, 6-3 parts of an intermediate joint a, 6-4 parts of a sliding sleeve, 6-5 parts of a bottom elastic claw, 6-6 parts of a bypass sleeve, 6-7 parts of a flow joint, 6-8 parts of an intermediate joint b, 6-9 parts of a spring, 6-10 parts of a flow short joint, 6-11 parts of a cross joint, 6-12 parts of an upper sealing joint, 6-13 parts of a lower sealing joint, 6-14 parts of a bursting disc, 6-15 parts of a C-shaped ring, 6-16 parts of a sealing valve seat, 6-17 parts of a cross sleeve, 6-18 parts of a sealing ring, 6-19 parts of an upper joint, 6-20 parts of a lower joint, 6-21 parts of a set screw, a lock cap 6-24, an upper cross joint; 7. load display collar, 8, flushing pipe, 9, polishing pipe, 10, top packer, 11, upper extension cylinder, 12, filling sliding sleeve, 12-1, outer sleeve, 12-2, upper joint, 12-3, sealing cylinder, 12-4, inner sliding sleeve, 12-5, through hole, 13, lower extension cylinder A, 14, load display collar, 15, lower extension cylinder B, 16, quick joint, 17, screen pipe, 18, double-valve float shoe, 18-1, lower valve seat, 18-2, upper joint, 18-3, guide shoe, 18-4, lower valve seat central hole, 18-5, upper check valve, 18-6, flow channel, 18-7, guide shoe central hole, 18-8, lower check valve, 18-9, main flow channel, 18-10, annular groove, 18-11, lateral flow hole, 18-12, A spring.
Detailed Description
The open-hole gravel packing sand control process comprises the following steps;
firstly, connecting and assembling an open-hole gravel packing sand control service string, wherein the open-hole gravel packing sand control service string comprises an inner string and an outer string, and the inner string consists of a setting tool 1, a shunt valve 2, a sealing short circuit 3, a static pressure test plug 4, a flow short circuit 5, a reverse circulation check valve 6, a load indicator 7 and a washpipe 8 polishing pipe 9 which are sequentially connected; the external pipe column consists of a top packer 10, an upper extension barrel 11, a filling sliding sleeve 12, a lower extension barrel A13, a load display coupling 14, a lower extension barrel B15, a quick joint 16, a sieve tube 17 and a double-valve float shoe 18 which are connected in sequence; a setting tool of an inner pipe column (service pipe column) is arranged at the uppermost end of the inner pipe column, the weight of the shaft pipe column is loaded by a bearing lug when the setting tool is put in, and the top packer 10 can be set after the setting tool is pressed; sealed short circuit 3 is installed between flow divider 2 and static pressure test stopper 4, passes through threaded connection with flow divider 2 and static pressure test stopper 4, and the sealed section of pit shaft is inserted to the during operation, plays sealed effect, and static pressure test stopper 4 passes through threaded connection with sealed short circuit 3 and mobile short circuit 4, provides the passageway for tubular column liquid flow, is the key that the tubular column filled the operation. A flow short-circuit 5 is arranged between the static
the static
Main flow passages 18-9 are uniformly distributed on the guide shoes 18-3, the main flow passages 18-9 are intermittently communicated with a central hole 18-4 of the lower valve seat through lower check valves 18-8, and the main flow passages 18-9 are main flow passages for leading the drilling fluid to the bottom of the well to circulate the drilling fluid; an annular groove 18-10 is formed in the circumference of the guide shoe 18-3, a lateral flow hole 18-11 is formed in the annular groove 18-10 and corresponds to the main flow channel 18-9, the lateral flow hole 18-11 is communicated with the main flow channel 18-9, and the lateral flow hole 18-11 has the effect that when the end of the main flow channel 18-9 is blocked, drilling fluid can enter an annular space between the guide shoe 3 and the casing pipe through the lateral flow hole 18-11 to further participate in circulation of the drilling fluid, so that blocking cannot be caused, subsequent operation cannot be influenced easily, and safety accidents cannot be caused easily; the lateral flow holes 18-11 are obliquely arranged, the diameter of the lateral flow holes 18-11 is smaller than that of the main flow channel 18-9, and the purpose is that when the end of the main flow channel 18-9 is blocked, drilling fluid enters an annular space between the guide shoe 18-3 and the casing from the lateral flow holes 18-11, and as the aperture of the lateral flow holes 18-11 is smaller than that of the main flow channel 18-9, when the drilling fluid is sprayed out from the lateral flow holes 18-11, the flow rate of the drilling fluid is larger, so that impurities at the bottom of a well can be flushed, and the impurities are not easy to gather at the annular groove 18-10 and cannot form blocking on the lateral flow holes 18.
When the double-valve float shoe works, the upper connector 18-2 is connected to the sieve tube 17 and is lowered to the bottom of a well, drilling fluid is introduced from a central hole of the upper connector 18-2 through a pipe column after the drilling fluid is lowered to the bottom of the well, when the pressure of the drilling fluid introduced into the central hole of the upper connector 18-2 is large enough, the upper check valve 18-5 is made to descend under the action of the pressure of the drilling fluid, the elastic force of an upper spring 18-12 of the upper check valve 18-5 and the pressure of the drilling fluid in a central hole 18-4 of a lower valve seat are overcome, the upper end of an upper check valve 18-5 is separated from the central hole of the upper connector 18-2 in the descending process of the upper check valve 18-5, the upper check valve 18-5 is opened, the central hole of the upper connector 18-2 is not sealed any more, the central hole of the upper connector 18-2 is made to be communicated with a fluid flow channel 18 In the central hole 18-4, the drilling fluid entering the central hole 18-4 of the lower valve seat pushes the lower check valve 18-8 to overcome the elasticity of an upper spring 18-12 of the lower check valve 18-8 and the pressure of the drilling fluid in the central hole 18-7 of the guide shoe to move downwards, so that the upper end of the lower check valve 18-8 is separated from the lower valve seat 18-1, the lower check valve 18-8 is opened, the central hole 18-4 of the lower valve seat is communicated with the main flow passage 18-9, and the drilling fluid in the central hole 18-4 of the lower valve seat flows into the main flow passage 18-9; after the upper check valve 18-5 and the lower check valve 18-8 are opened, drilling fluid introduced into the central hole of the upper joint 18-2 sequentially passes through the central hole of the upper joint 18-2, the fluid flow channel 18-6 and the central hole of the lower valve seat 18-4 to enter the main flow channel 18-9; one part of the drilling fluid entering the main flow passage 18-9 is introduced into the bottom of the well from the outlet of the main flow passage 18-9 for circulation of the drilling fluid, and the other part of the drilling fluid enters the annular space between the guide shoe 18-3 and the casing through the lateral flow hole 18-11 and directly participates in circulation of the drilling fluid.
When the circulation of drilling fluid needs to be cut off, the pressure of the drilling fluid introduced into the central hole of the upper joint 18-2 is reduced, when the pressure difference between the upper end and the lower end of the upper check valve 18-5 is not enough to overcome the elastic force of the spring 18-12 on the upper check valve 18-5, the upper check valve 18-5 returns to the seat upwards under the elastic force of the spring 18-12, so that the upper check valve 18-5 is sealed with the upper joint 18-2, the connecting channel between the central hole of the upper joint 18-2 and the fluid flow channel 18-6 is cut off, the drilling fluid in the central hole of the upper joint 18-2 does not enter the fluid flow channel 18-6 any more, the drilling fluid pressure in the central hole 18-4 of the lower valve seat is gradually reduced, the drilling fluid pressure in the central hole 18-4 of the lower valve seat is reduced to the pressure difference between the two ends of the lower check valve 18-8 is not enough to overcome, the lower check valve 18-8 is reset upwards and back under the action of the elastic force of the spring 18-12, so that the lower check valve 18-8 is sealed with the lower valve seat 18-1, the central hole 18-4 of the lower valve seat is further closed, the central hole 18-4 of the lower valve seat is not communicated with the main flow passage 18-9 any more, and a flow passage between the central hole of the upper joint 18-2 and the main flow passage 18-9 is completely cut off through the upper check valve 18-5 and the lower check valve 18-8, so that the circulation of drilling fluid is cut off. The double-valve float shoe 18 enables drilling fluid to circulate through the main flow passage 18-9 and the side flow holes 18-11, so that blocking can be effectively prevented, subsequent operation cannot be influenced, and meanwhile, the risk of safety accidents can be effectively reduced.
After the inner pipe column and the outer pipe column are connected and assembled, the outer pipe column is put into a preset position in a well through an oil pipe, the well is fixed through a well mouth, then the inner pipe column is put into the outer pipe column through the oil pipe, then the oil pipe is pressed from the well mouth, positive circulation testing is carried out on the inner pipe column and the outer pipe column, and mud in the outer pipe column is removed.
After the positive circulation test is finished, 1.75in of copper balls are thrown into the inner pipe column, after the copper balls fall to a ball seat on the
The setting tool is composed of a mandrel 1-1, a setting component 1-3, a bushing component 1-20 and a release component 1-27, wherein the inner hole of the mandrel 1-1 is a stepped hole, and an upper pressure transmission hole 1-2 is formed in the mandrel 1-1. The top end of the mandrel 1-1 is sleeved with a setting component 1-3, the setting component 1-3 consists of an upper joint 1-4, an upper ball seat 1-5, a sealing ring 1-6, an upper pressing cap 1-7, a piston 1-8, an outer sleeve 1-9, an extension cylinder 1-10, a sliding sleeve 1-11, a lower pressing cap 1-12 and a locking component 1-13, the upper joint 1-4 is connected with the mandrel 1-1 in a key mode, the upper ball seat 1-5 is installed on the internal thread of the upper joint 1-4, the sealing ring 1-6 is sleeved on the upper joint 1-4, the outer sleeve 1-9 is installed on the upper joint 1-4 below the sealing ring 1-6 in a threaded mode, the upper pressing cap 1-7 is installed on the top end thread of the outer sleeve 1-9, and the upper pressing cap 1-7 is sleeved on the, to enhance the sealing effect of the sealing rings 1-6.
A piston 1-8 is slidably arranged between an outer sleeve 1-9 and an upper joint 1-4, an inner hole of the piston 1-8 is communicated with an upper pressure transfer hole 1-2, an extension barrel 1-10 is sleeved on a mandrel 1-1 below the piston 1-8, the extension barrel 1-10 is connected with the mandrel 1-1 through a shear pin, a locking component 1-13 is sleeved in a bottom end port of the extension barrel 1-10, the locking component 1-13 is composed of a locking seat 1-14, a limiting pin 1-15, a mounting ring 1-16, a locking raised head 1-17 and a spring 1-18, a plurality of limiting pins 1-15 are inserted on the locking seat 1-14, a mounting ring 1-16 is sleeved in the locking seat 1-14 below the limiting pin 1-15, a plurality of locking raised heads 1-17 are arranged in the locking seat 1-14 above the mounting ring 1-16, the locking raised heads 1-17 are in a convex shape, the top ends of the locking raised heads 1-17 are provided with limiting grooves 1-19, the limiting grooves 1-19 are used for preventing the locking raised heads 1-17 from interfering with the limiting pins 1-15, the bottom ends of the locking raised heads 1-17 are connected with the mounting rings 1-16 through springs 1-18, the top ends of the locking raised heads 1-17 extend out of the locking seats 1-14, and the locking raised heads 1-17 cannot leave the locking seats 1-14 under the action of the limiting pins 1-15; a sliding sleeve 1-11 is sleeved on the extension cylinder 1-10 above the locking component 1-13, the sliding sleeve 1-11 is connected with the extension cylinder 1-10 through a shearing pin, and a lower pressing cap 1-12 is installed on the top end of the sliding sleeve 1-11 through threads.
The bottom end of the mandrel 1-1 is sleeved with a release component 1-27, the release component 1-27 is composed of a sleeve 1-28, a push cylinder 1-29, an inner ratchet 1-30, an outer ratchet 1-31, a sliding support ring 1-32, a support ring press cap 1-33, a slip 1-34, a snap spring 1-35, a slip sleeve 1-36, a positioning joint 1-37, a lower ball seat 1-38 and a lower joint 1-39, the push cylinder 1-29 is sleeved on the mandrel 1-1, the top end of the push cylinder 1-29 is sleeved with the sleeve 1-28, the sleeve 1-28 is connected with the push cylinder 1-29 through a shearing pin, the inner ratchet 1-30 is installed on an internal thread of a bottom end port of the push cylinder 1-29, the outer ratchet 1-31 is installed on the inner ratchet 1-30 in a meshed manner, the outer ratchet 1-31 is connected with the inner ratchet 1-30 through a shearing pin, a sliding support ring 1-32 is sleeved on the mandrel 1-1 below the outer ratchet 1-31, the sliding support ring 1-32 is connected with the mandrel 1-1 through the shearing pin, and a plurality of support flanges are arranged on the sliding support ring 1-32 at intervals.
The top end of the sliding support ring 1-32 is provided with a support ring pressing cap 1-33 in a threaded manner, a slip 1-34 is sleeved on the sliding support ring 1-32 below the support ring pressing cap 1-33, a plurality of inner flanges are arranged at intervals on the inner side of the slip 1-34, the inner flanges are matched with the support flanges to enable the slip 1-34 to maintain a stable state, when the sliding support ring 1-32 generates axial displacement in the working process, the support flanges are staggered with the inner flanges of the slip 1-34, so that the slip 1-34 loses support and is collapsed, a clamping spring sheet 1-35 is clamped in the slip 1-34, and the clamping spring sheet 1-35 is used for enhancing the strength of the slip 1-34 when being anchored on a packer; the slips 1-34 are sleeved with the slips 1-36, a positioning joint 1-37 is arranged between the slips 1-36 and the mandrel 1-1 in a threaded mode, the positioning joint 1-37 is connected with the mandrel 1-1 in a threaded mode, a lower ball seat 1-38 is arranged in the positioning joint 1-37 in a threaded mode, and a lower joint 1-39 is arranged at the bottom end of the lower ball seat 1-38 in a threaded mode.
The end opening at the top end of the mandrel 1-1 is internally sleeved with a bushing assembly 1-20, the bushing assembly 1-20 is composed of a sealing short section 1-21, an upper release ring 1-22, an inner ball seat 1-23, a lower release ring 1-24 and a limiting ring 1-25, the inner hole of the sealing short section 1-21 is a stepped hole, the sealing short section 1-21 is provided with a lower pressure transmission hole 1-26, the top end of the sealing short section 1-21 is sleeved with the upper release ring 1-22, the upper release ring 1-22 is connected with the sealing short section 1-21 through a shearing pin, and the stepped inner hole of the mandrel 1-1 clamps the upper release ring 1-22 so that the upper release ring cannot move downwards; the internal thread of the bottom end port of the sealing short section 1-21 is provided with a limiting ring 1-25, an internal ball seat 1-23 is sleeved in the sealing short section 1-21, a lower release ring 1-24 is sleeved in the sealing short section 1-21 below the internal ball seat 1-23, the lower release ring 1-24 is connected with the sealing short section 1-21 through a shearing pin, and the lower release ring 1-24 is matched with the stepped inner hole of the sealing short section 1-21 to play an axial limiting role in the internal ball seat 1-23.
The opening process of the setting tool comprises the following steps: putting the assembled hydraulic setting tool and the packer downwards into a specified position in a well, clamping the locking raised heads 1-17 at the joints of the components in the packer, and maintaining the locking function of the locking raised heads 1-17 through the elasticity of the springs 1-18; then putting a setting ball into the setting tool, the setting ball falls downwards under the action of gravity, then clamping the setting ball at the port of an inner ball seat 1-23 to enable the bushing component 1-20 to be in a closed state, pumping drilling fluid into the setting tool through an upper joint 1-4, enabling the drilling fluid to enter the bushing component 1-20 through an inner hole of the upper joint 1-4 and an inner hole of an upper ball seat 1-5, shearing a shearing pin on an upper release ring 1-22 by hydraulic force to enable the bushing component 1-20 to move downwards along the inner hole of the mandrel 1-1 until a limiting ring 1-25 contacts the reducing part of the inner hole of the mandrel 1-1 to stop moving the bushing component 1-20, and at the moment, a lower pressure transfer hole 1-26 on a sealing short section 1-21 is communicated with an upper pressure transfer hole 1-2 of the mandrel 1-1, and finishing the opening work of the setting tool.
The setting process of the setting tool comprises the following steps: continuously pumping drilling fluid into the setting tool, enabling the drilling fluid to enter a cavity between the piston 1-8 and the mandrel 1-1 through the lower pressure transmission hole 1-26 and the upper pressure transmission hole 1-2, continuously pressurizing to enable the pressure of the drilling fluid to reach the starting pressure of the packer, shearing a shearing pin between the extension cylinder 1-10 and the mandrel 1-1 by hydraulic pressure, pushing the piston 1-8 and the extension cylinder 1-10 to synchronously move downwards, and in the process, synchronously moving the sliding sleeve 1-11 along with the extension cylinder 1-10 and pushing a component on the packer to perform setting; the extension sleeve 1-10 is further moved downward and pushes the locking assembly 1-13 downward, the locking assembly 1-13 pushes the sleeve 1-28, shearing the shear pin between the sleeve 1-28 and the push sleeve 1-29, and then pushes the sleeve 1-28 to continue moving downward until the packer is fully set.
The release process of the setting tool is as follows: after the packer is set, drilling fluid is continuously pumped into the setting tool, the locking assembly 1-13 moves downwards for a certain distance and then contacts the push cylinder 1-29, the push cylinder 1-29 drives the inner ratchet 1-30 to move downwards and cuts off a cutting pin between the inner ratchet 1-30 and the outer ratchet 1-31, the outer ratchet 1-31 loses support and does not conduct rotating force any more, the inner ratchet 1-30 moves downwards for a certain distance and then contacts the support ring press cap 1-33, the pushing force is transmitted to the sliding support ring 1-32 through the support ring press cap 1-33, the cutting pin between the sliding support ring 1-32 and the mandrel 1-1 is cut off, and the sliding support ring 1-32 moves downwards for a small displacement; the sliding support ring 1-32 stops moving when contacting the positioning joint 1-37, but the small displacement of the sliding support ring 1-32 makes the support flange stagger with the inner flange of the slip 1-34, further makes the slip 1-34 lose support and collapse, the slip 1-34 separates from the packer after collapsing, the hydraulic releasing function is realized, and the releasing work of the setting tool is completed.
After the top packer 10 is set, the oil pipe is continuously pressed, the
After the setting ball falls to a lower ball seat 5-9 on the static
When the seal is tested, the inner pipe column is lifted, the elastic sleeve 6-2 on the reverse
The upper joints 6-19 are connected with the outer pipe column, and the lower joints 6-20 are connected with the lower pipe column. The intermediate joint a6-3 and the intermediate joint b6-8 are locked by the set screws 6-21. A plurality of O-shaped sealing rings are arranged in corresponding O-shaped ring grooves through spacer rings 6-22 and locking caps 6-23 respectively, the spacer rings 6-22 can protect the O-shaped ring grooves from being damaged, and the locking caps 6-23 are used for limiting the positions of the spacer rings 6-22. The cross joints 6-11 play a role in supporting and righting; the cross sleeves 6-17 are used for supporting and righting the flow joints 6-7; the upper cross joint 6-11 is used for righting and supporting the flow short-circuit 6-10.
The upper sleeve 6-1 is sleeved with an elastic sleeve 6-2, the right end of the elastic sleeve 6-2 is connected with a sliding sleeve 6-4 through an intermediate joint a6-3, the right end of the sliding sleeve 6-4 is connected with a bottom elastic claw 6-5, and the bottom elastic claw 6-5 limits and positions the sliding sleeve 6-4; the upper sleeve 6-1 is provided with a bypass sleeve 6-6 through an O-shaped sealing ring, and the installation position of the bypass sleeve 6-6 corresponds to the sliding sleeve 6-4; one end of the flow joint 6-7 is connected with a flow short circuit 6-10 through an intermediate joint b6-8 and a spring 6-9, and the flow short circuit 6-10 is connected with a cross joint 6-11; the flow short circuit 6-10 is supported and centered through an upper cross joint 6-24; the other end of the flowing joint 6-7 is connected with an upper sealing joint 6-12 through an O-shaped sealing ring, the upper sealing joint 6-12 is connected with a lower sealing joint 6-13 through the O-shaped sealing ring, and a rupture disc 6-14 is arranged between the upper sealing joint 6-12 and the lower sealing joint 6-13 through the O-shaped sealing ring; the large-diameter end of the flow joint 6-7 is connected with the upper joint 6-19, the small-diameter end of the flow joint 6-7 is arranged on the sealing valve seat 6-16 through the C-shaped ring 6-15 and the O-shaped sealing ring, and the sealing valve seat 6-16 is fixedly arranged with the lower joint 6-20; the flow joint 6-7 is provided with a cross sleeve 6-17.
The upper sleeve 6-1 is used to construct the internal flow channel and to support the flexible sleeve 6-2. The upper sealing joints 6-12 form the isolation of the inner and outer flow passages. The lower sealing joint 6-13 and the sealing valve seat 6-16 form the sealing of the inner flow passage hole. The sliding sleeve 6-4 is matched with the elastic sleeve 6-2 to open or close the bypass hole of the bypass sleeve 6-6. The sealing rings 6-18 are matched with the O-shaped sealing rings to seal the channels of the bypass holes of the bypass sleeves 6-6. The C-ring 6-15 is used to seal the restricted positioning of the valve seat 6-16. The cross sleeves 6-17 serve to support and centralize the flow joints 6-7. The bypass 6-6 constitutes a positive circulation channel. The rupture discs 6-14 are used for testing the sealing performance of the top packer rubber cylinder, and the working principle of the reverse
flow path of closing the bypass valve of the reverse circulation check valve 6: the upper joint 6-19 is connected with an outer pipe column, the outer pipe column is slowly lifted for a certain distance, the upper sleeve 6-1 is driven to move for a certain distance along with the upper joint, the elastic sleeve 6-2 is pushed against the clamping point of the outer pipe, at the moment, the bottom elastic claw 6-5 overcomes the self elasticity to cross the lower joint 6-20, the elastic sleeve 6-2, the middle joint a6-3, the sealing ring 6-18 and the sliding sleeve 6-4 are driven to move downwards for a certain stroke until the next reducing part of the lower joint 6-20 is clamped, and at the moment, the bypass valve of the reverse circulation check valve is closed.
And (3) seal checking flow: and the outer pipe column is stopped lifting after the outer pipe column is continuously lifted to the top seal checking position, and the sealing condition of the top packer can be checked by pressurizing the outer pipe column in the annular space.
And (3) breaking the rupture disk 6-14: after the pressure test of the packer is qualified, the external pipe column is continuously pressurized to 1500psi, and then the rupture disk 6-14 can be broken.
Filling operation flow: and (4) moving the outer pipe column downwards to a filling position, wherein the bypass valve of the reverse circulation check valve is in a closed state, and filling operation can be carried out.
Reverse circulation operation flow: after the outer pipe column is continuously lifted to the reverse circulation position, because the bypass valve of the reverse circulation check valve is still in a closed state, the reverse circulation well flushing can be started until the liquid returned from the well head is consistent with the entering liquid.
Procedure for opening the bypass valve of the reverse circulation check valve 6: after the reverse circulation well washing is completed, the external pipe column is moved downwards, when the elastic sleeve 6-2 is propped against the clamping point of the outer pipe, the external pipe column continues to move downwards, at the moment, the elastic claw 6-5 at the bottom overcomes the elasticity of the elastic claw per se, goes over the lower joint 6-20, and travels downwards for a certain stroke together with the elastic sleeve 6-2, the middle joint a6-3, the sealing ring 6-18 and the sliding sleeve 6-4 until the next reducing part of the lower joint 6-20 is clamped, at the moment, the bypass valve of the reverse circulation check valve is opened, and then the forward circulation operation can be carried out.
The rupture discs 6-14 arranged on the reverse
After the reverse
The filling sliding sleeve 12 consists of an outer sleeve 12-1, an upper joint 12-2 and a sealing barrel 12-3, wherein one end of the outer sleeve 12-1 is provided with the upper joint 12-2 in a threaded manner, and the end of the upper joint 12-2 is provided with the sealing barrel 12-3 in a threaded manner; an inner sliding sleeve 12-4 is movably arranged in the outer sleeve 12-1 through a retaining ring, and through holes 12-5 are uniformly distributed on the circumference of the outer sleeve 12-1 corresponding to the inner sliding sleeve 12-4.
When in filling operation, the pipe column is lifted up and then put down, the elastic sleeve 6-2 on the reverse
After the filling operation is finished, redundant gravel remained in the oil pipe needs to be washed out of a shaft in a reverse circulation mode, when the reverse circulation operation is carried out, the inner pipe column is lifted up to close the reverse
After the reverse circulation operation is finished, the pickling operation is carried out on the tubular column, during the pickling operation, the tubular column is continuously lifted to a pickling position, after the tubular column is lifted to the pickling position, the reverse
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