阅读说明：本技术 一种一体化泵抽联作带压转抽管柱及封堵工具及方法 (Integrated pumping linkage pressurized rotary pumping pipe column, plugging tool and plugging method ) 是由 刘丙生 古光明 付增 苏秋涵 郝丽伟 孟宪波 刘彦辉 唐倩雯 刘常福 徐文庆 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种一体化泵抽联作带压转抽管柱及封堵工具及方法,其中管柱包括连接在油管上的抽油泵、封隔器、措施工具,共同构成措施管柱,其中封隔器位于措施工具上方,抽油泵位于封隔器上方；还包括：预置工作筒,所述预置工作筒连接在油管上,预置工作筒位于抽油泵下方；封堵工具,所述封堵工具安装于预置工作筒内部；顶杆,所述顶杆上端与抽油泵的抽油泵内筒连接固定,顶杆下端与封堵工具上端相对应,触发式对封堵工具控制开关。本发明封堵工具从井口连接的防喷管内下入,在下入抽油泵内筒的同时,即可实现封堵工具的打开,简单方便、安全可靠；提出抽油杆时,管柱自动密封,方便下次作业施工。(The invention discloses an integrated pumping linkage pressurized rotary pumping pipe column, a plugging tool and a method, wherein the pipe column comprises an oil well pump, a packer and a measure tool which are connected to an oil pipe, and the measure pipe column is formed by the oil well pump, the packer and the measure tool together, wherein the packer is positioned above the measure tool, and the oil well pump is positioned above the packer; further comprising: the preset working barrel is connected to the oil pipe and is positioned below the oil well pump; the plugging tool is arranged inside the preset working barrel; the upper end of the ejector rod is fixedly connected with an inner cylinder of an oil well pump of the oil well pump, the lower end of the ejector rod corresponds to the upper end of the plugging tool, and the plugging tool is controlled to be switched in a triggering mode. The plugging tool is inserted into the blowout-preventing pipe connected with the wellhead, and can be opened while being inserted into the inner cylinder of the oil well pump, so that the plugging tool is simple, convenient, safe and reliable; when the sucker rod is put forward, the pipe column is automatically sealed, and the next operation and construction are facilitated.)

1. An integrated pumping linkage under-pressure rotary pumping pipe column comprises an oil well pump, a packer and a measure tool which are connected to an oil pipe, and the measure pipe column is formed by the oil well pump, the packer and the measure tool together, wherein the packer is positioned above the measure tool, and the oil well pump is positioned above the packer;

it is characterized by also comprising:

the preset working barrel is connected to the oil pipe and is positioned below the oil well pump;

the plugging tool is arranged inside the preset working barrel;

the upper end of the ejector rod is fixedly connected with an inner cylinder of an oil well pump of the oil well pump, the lower end of the ejector rod corresponds to the upper end of the plugging tool, and the plugging tool is controlled to be switched in a triggering mode.

2. The integrated pumping combined operation pressure rotary pumping pipe column according to claim 1, wherein the preset working barrel is provided with threads for connecting an oil pipe at the upper end and the lower end, two cavities with different diameters are arranged in the preset working barrel from top to bottom, the two cavities are respectively an upper cavity and a lower cavity, the inner diameter of the upper cavity is larger than that of the lower cavity, a limiting inclined plane is formed at the joint of the upper cavity and the lower cavity, and a locking step with the diameter expanded is arranged on the inner wall in the lower cavity.

3. An integrated pumping with pressure swing pump string as claimed in claim 2, wherein the plugging tool comprises:

the plugging tool body is axially communicated, the outer wall of the upper half section of the plugging tool body is sealed with the inner wall of the upper cavity of the preset working barrel, the outer diameter of the lower half section of the plugging tool body is smaller than the inner diameter of the upper cavity of the preset working barrel, and the lower half section of the plugging tool body is provided with an upper channel which is radially communicated;

the piston sealing element is arranged on the outer wall of the piston, the piston is arranged in the plugging tool body, and the inner wall of the plugging tool body is provided with a limiting table for limiting the piston to move upwards; when the piston reaches the limiting table, the lowest end of the piston is higher than the upper channel; in an initial state, the piston is fixed at the position of the limit table through a shear pin;

the one-way valve is connected to the upper end of the plugging tool body, and the upper end of the one-way valve corresponds to the ejector rod;

the locking pipe, the locking pipe is to lining up, the locking pipe upper end is connected with shutoff instrument body lower extreme, the locking pipe first section external diameter is greater than the locking pipe second section external diameter, be the inclined plane between locking pipe first section and the locking pipe second section, the inclined plane with spacing inclined plane cooperation is spacing, locking pipe first section external diameter is less than and presets working barrel and goes up the cavity internal diameter, and locking pipe first section sets up the lower passageway that radially link up, locking pipe upper end mouth inner wall installation blind plate, the position that the blind plate was located is higher than the position that the passageway was located down.

4. The integrated pumping combined pressure rotary pumping column as claimed in claim 3, wherein the lower half section of the locking pipe is a split elastic locking claw, and the locking claw is inserted into the lower cavity of the preset working barrel and clamps a step outside the locking claw on the locking step.

5. An integrated pumping combination pressure swing pump string as claimed in claim 3 or claim 4, wherein the one-way valve comprises:

the lower end of the valve cylinder is connected with the upper end of the plugging tool body;

the valve seat is arranged in the inner wall of the upper port of the valve barrel, the upper port of the valve barrel is connected with the gland, the lower end of the gland tightly presses the valve seat, the inner diameter of the gland is larger than the inner diameter of the valve seat, and the inner diameter of the valve seat is larger than the outer diameter of the ejector rod;

the valve ball is arranged in the valve barrel, and the diameter of the valve ball is larger than the inner diameter of the lower port of the valve seat;

the lower end of the spring guide post is connected to a porous plate, and the porous plate is fixed at the upper port of the plugging tool body;

and the lower end of the spring is sleeved on the spring guide post, and the upper end of the spring props against the valve ball.

6. An occlusion tool, comprising:

the plugging tool body is axially communicated, the outer wall of the upper half section of the plugging tool body is sealed with the inner wall of the upper cavity of the preset working barrel, the outer diameter of the lower half section of the plugging tool body is smaller than the inner diameter of the upper cavity of the preset working barrel, and the lower half section of the plugging tool body is provided with an upper channel which is radially communicated;

the piston sealing element is arranged on the outer wall of the piston, the piston is arranged in the plugging tool body, and the inner wall of the plugging tool body is provided with a limiting table for limiting the piston to move upwards; when the piston reaches the limiting table, the lowest end of the piston is higher than the upper channel; in an initial state, the piston is fixed at the position of the limit table through a shear pin;

the one-way valve is connected to the upper end of the plugging tool body, and the upper end of the one-way valve corresponds to the ejector rod;

the locking pipe is axially through, the upper end of the locking pipe is connected with the lower end of the plugging tool body, the outer diameter of the upper half section of the locking pipe is larger than that of the lower half section of the locking pipe, an inclined surface is arranged between the upper half section of the locking pipe and the lower half section of the locking pipe, the inclined surface is matched with the limiting inclined surface for limiting, the outer diameter of the upper half section of the locking pipe is smaller than the inner diameter of an upper cavity of a preset working barrel, a radially through lower channel is formed in the upper half section of the locking pipe, a blind plate is arranged on the inner wall of the upper end opening of the locking pipe, and the position of the blind plate is higher than that of the lower channel; the lower half section of the locking pipe is a split elastic locking claw, and the locking claw is inserted into the lower cavity of the preset working barrel and enables a step outside the locking claw to be clamped on the locking step.

7. The occlusion tool of claim 6, wherein the one-way valve comprises:

the lower end of the valve cylinder is connected with the upper end of the plugging tool body;

the valve seat is arranged in the inner wall of the upper port of the valve barrel, the upper port of the valve barrel is connected with the gland, the lower end of the gland tightly presses the valve seat, the inner diameter of the gland is larger than the inner diameter of the valve seat, and the inner diameter of the valve seat is larger than the outer diameter of the ejector rod;

the valve ball is arranged in the valve barrel, and the diameter of the valve ball is larger than the inner diameter of the lower port of the valve seat;

the lower end of the spring guide post is connected to a porous plate, and the porous plate is fixed at the upper port of the plugging tool body;

and the lower end of the spring is sleeved on the spring guide post, and the upper end of the spring props against the valve ball.

8. An integrated pumping and pressure-bearing combined rotary pumping method is characterized by comprising the following steps:

a preset working barrel is connected below the outer barrel of the rod-type oil well pump, when a plugging tool falls into the preset working barrel, along with the reduction of a gap, the well mouth pressurizing pressure rises, the inclined plane of the plugging tool reaches the limiting inclined plane of the preset working barrel, the outer diameter of the plugging tool shrinks under the elastic action of a locking claw and enters the lower working barrel, the step on the locking claw is above a locking step, then, under the action of the pressure in an oil pipe, a valve ball moves downwards to compress a spring, the liquid pressure acts on a piston, the piston drives the plugging tool to move downwards continuously along with the continuous rising of the pressure, when the step on the locking claw moves downwards to the position below the locking step, the locking claw expands under the elastic action, the step of the locking claw is clamped on the locking step, the plugging tool is locked with the preset working barrel, and the position of the plugging tool is limited;

the pressure in the oil pipe is continuously increased, when the stress of the piston is larger than the shearing force of the shear pin, the shear pin is sheared off, the piston falls onto the blind plate, at the moment, the upper channel is communicated with the lower channel, the plugging tool is communicated with the stratum, the pressure at the well head suddenly drops, and therefore the situation that the plugging tool is put down in place can be judged on the ground;

the pressure in the wellhead is relieved, the pressure in the oil pipe is reduced, the valve ball is quickly reset under the action of the spring, meanwhile, due to the action of the pressure of the ground pressure in the oil pipe at the lower part of the plugging tool, the pressure acts on the valve ball, the valve ball is matched with the ball seat, and the pressure in the oil pipe is sealed, so that the pressure in the oil pipe is prevented from being transmitted to the wellhead;

after the pressure in the oil pipe is effectively controlled, the rod-type oil well pump inner cylinder and the sucker rod can be lowered into the oil pipe from a well head, the lower part of the rod-type pump inner cylinder is connected with a push rod, the length of the push rod is determined according to the distance between the rod-type oil well pump outer cylinder and a preset working cylinder, after the rod-type oil well pump inner cylinder is ensured to be lowered to the proper position, the push rod can push open a valve ball, the valve ball moves down for a certain distance, so that the position of a ball seat is opened, an oil flow channel is formed, the position of the push rod is locked when the rod-type oil well pump inner cylinder is locked, and the position of the push rod can be changed only when the rod-type oil well pump inner cylinder moves;

the inner cylinder and the ejector rod of the rod-type oil well pump are put down in place, the oil flow channel is communicated, liquid in the well enters the oil well pump through the lower channel, the upper channel and the ball seat, ground oil pumping equipment is started, and the oil well pump lifts the well liquid to the ground, so that the pressurized rotary pumping operation construction of the integrated pumping and combined pipe column is realized.

9. A method of integrated pumping with pressure conversion pumping according to claim 8, characterized by comprising the following steps:

when the pumping rod and the oil pipe in the well need to be lifted down for the next operation, if pressure still exists in the well, the pumping rod is lifted up, the pumping rod drives the inner cylinder and the ejector rod of the rod-type oil well pump to move upwards, the valve ball is seated on the ball seat under the action of the spring and the pressure in the well, the pressure in the well is sealed, and the oil pipe and the pumping rod are safely lifted up and down; if no pressure exists in the well, after the sucker rod is lifted out, a plugging tool can be opened by throwing weights such as a short joint of the sucker rod and the like, the oil sleeve is communicated, oil drainage of the oil pipe is realized, and oil pipe spraying and lifting operation is avoided.

10. A method of integrated pumping with pressure conversion pumping according to claim 8 or 9, characterized by comprising the following steps:

a preset working barrel is connected below the outer barrel of the rod-type oil well pump, and before a plugging tool falls into the preset working barrel, a pipe column channel above the measure tool is unblocked at the moment, so that measure construction can be carried out, or a test tool is put into the pipe column channel for test construction;

after the measure construction, if the phenomenon of self-blowing occurs, the oil pipe has pressure, when the inner cylinder of the oil well pump and the sucker rod are required to be pressed down under pressure to pump, the blowout prevention pipe is installed from the wellhead, the plugging tool is placed into the blowout prevention pipe, the gate of the wellhead is opened, the plugging tool falls down along the oil pipe under the action of gravity, if the viscosity of liquid in the well is high, the plugging tool is pressed from the wellhead to the oil pipe when being difficult to place, and the plugging tool is pushed to fall down.

Technical Field

The invention relates to the technical field of plugging of an oil well pressurized rotary pumping string in an oil field, in particular to an integrated pumping linkage pressurized rotary pumping string, a plugging tool and a plugging method.

Background

Along with the development of oil fields, a plurality of oil wells need to be constructed by measures to improve the recovery ratio of oil reservoirs, and the oil wells need to be put into normal production after the measures are taken, so that the pumping pipe column needs to be put in again after the measure pipe column is pulled out. In order to reduce the times of pulling oil pipes, the oil field is researched and restricted for many years to form a multifunctional integrated pumping combined pipe column, so that the combined operation of fracturing, perforating, acidizing and testing and the pumping pipe column can be realized respectively, after the measure construction is completed, an oil well pump and a sucker rod can be directly put in for pumping production, the measure pipe column is not required to be pulled out, the field operation construction time is greatly shortened, and the operation efficiency is improved.

However, after fracturing, acidizing, perforating and other measures, a part of wells have spontaneous flow. Along with the reduction of oil reservoir pressure, after well head pressure reduces to certain pressure, oil well output can not reach the match production requirement, because tubular column and oil reservoir intercommunication in the well, tubular column internal pressure can't effective control, leads to the unable setting in sucker rod. At present, pumping rods are pumped in two modes, one mode is well killing and well pressure balancing, and the method can damage oil layers and influence the productivity of oil wells; the second is that the pumping rod is put in after the oil layer has no self-spraying capability, thus greatly prolonging the waiting time of pumping, reducing the oil well output and increasing the operation cost.

Publication (bulletin) No.: CN101498394B, publication (public notice) day: a2010-07-21 oil gas pipeline quick under-pressure plugging device and a method thereof are provided with an inner steel cover and an outer sealing pipe which are sleeved together, wherein the inner steel cover is a circular pipe shaped cover, the outer wall of the inner steel cover is provided with an upper section and a lower section with different outer diameters, the outer diameter of the upper section of the circular pipe is smaller than that of the lower section of the circular pipe, the wall of the upper section of the circular pipe is provided with a thread and a nut, the top of the cover is provided with an oblique drainage port, the upper end of the outer side of the top of the cover is provided with a horizontal pressure bar hole, the opening of a saddle shaped cover is provided with a sealing ring, the upper end of the outer sealing pipe is provided with an inward edge, the edge inner hole is sleeved on the upper section of the circular pipe, a sealing ring is arranged between the inner wall of the outer sealing pipe and the outer wall of the lower section of the inner steel cover, and a glue injection hole is arranged on the side wall between the lower end pipe orifice of the outer sealing ring of the outer sealing pipe. The invention has the steel cover, the outside of the steel cover is sleeved with the external closed pipe, when the leakage point of the oil gas pipeline is blocked, the steel cover is combined with the sealing ring and the external closed pipe is combined with the sealing glue to rapidly block the leakage point on the oil gas pipeline under pressure in the normal transportation process of the oil gas pipeline, the labor consumption is less, the time consumption is short, the cost is low, and the normal transportation of the oil gas is not influenced.

Publication (bulletin) No.: CN101144377B, publication (public notice) day: 2011-04-20A tubing string plugging device for sucker rod pump oil pumping completion in oil well operation under pressure comprises an adjusting mandrel, a coupling, an upper joint, an upper piston, a locking nut, a striking rod, an oil pipe, a lower joint, a lower piston, a sieve tube, a plug and an oil well pump, wherein the lower end of the oil well pump is sequentially connected with the coupling, the upper joint, the coupling, the oil pipe, the coupling, the lower joint, the coupling, the sieve tube and the plug, the upper piston is fixed in the upper joint through an upper shear pin, the adjusting mandrel is installed in the upper piston, the upper end of the mandrel props against a fixed valve ball of the oil well pump, the lower end of the mandrel is connected with the striking rod through the locking nut, the striking rod is located in the oil pipe, and the lower piston is fixed in the lower joint through a lower shear pin. The invention has the characteristics of convenient installation, high sealing pressure, high success rate of forming an oil inlet channel by pressing, reduction of construction difficulty and the like, and is widely applied to petroleum extraction and workover operation processes.

Publication (bulletin) No.: CN107366510A, publication (public notice) day: 2017-11-21 discloses a downhole plugging device and a workover technique for lifting and lowering a sucker rod and an oil pipe under pressure, the oil pipe column is internally provided with a sealing convex seat and a limiting boss which are provided with sealing surfaces, a rod pump is arranged in the oil pipe column above the sealing convex seat in a matching way, the sealing surface of the sealing boss arranged on the rod pump is matched with the sealing surface of the sealing convex seat in the oil pipe column, an outer oil inlet hole is arranged on the pipe wall of the oil pipe column below the limiting boss, an inner pipe is arranged in the section of the oil pipe column in a matching way, an inner oil inlet hole corresponding to an outer oil inlet hole of the oil pipe column is arranged on the pipe wall of the inner pipe, a sealing groove is arranged on the pipe wall of the inner pipe positioned at the lower part of the inner oil inlet hole of the inner pipe, the sealing groove is internally provided with a sealing ring which is in sealing fit with the inner wall of the oil pipe column, the upper end of the inner pipe is connected with a rod pump through a disconnecting device, and the pipe orifice at the lower end of the oil pipe column is sealed. The device has simple and reasonable structure and reliable performance, can realize the workover operation of lifting and lowering the sucker rod and the oil pipe under pressure, can conveniently and repeatedly block the underground pressure, and realizes safe, efficient, environment-friendly and energy-saving production.

Publication (bulletin) No.: CN210134870U, publication (public notice) day: 2020-03-10 discloses an oil pipe plugging device, which comprises: the oil well pump, the sucker rod and the center tube which are respectively connected with the oil well pump, the sucker rod joint which is respectively connected with the sucker rod, a supporting rod, a pin block, a valve body, a valve core and a pressing cap which is connected with the valve core are sleeved on the fishing spear. The pin block is arranged on a through groove formed in the central pipe and is fixed by the valve core and a pressing cap above the through groove of the central pipe during oil extraction operation; the outer surface of the salvaging joint close to the central pipe is provided with a groove, and the pin block part is clamped in the groove in a matching way; the central pipe and the valve body are respectively connected with the upper joint; the valve body and the outer pipe connected with the bottom plug are respectively connected with the lower joint; the two ends of the inner pipe are respectively connected with the central pipe and the oil well pump. The utility model discloses when the oil-well pump plays out, salvage the lance card in the recess of salvage joint, salvage joint goes upward and drives the case through the round pin piece simultaneously and goes upward, closes the annular intercommunication space that valve body and inner tube and outer tube formed, effectively realizes shutoff in the oil pipe, easy operation is reliable.

Publication (bulletin) No.: CN102913189A, publication (public notice) day: 2013-02-06 relates to a valve device, in particular to plugging of a tail pipe of a tubing string. The plug comprises a body, wherein a screw is arranged in the body, a ball valve is arranged at the lower part of the screw, and the ball valve is telescopically connected with the screw. According to the plug, the opening of the ball valve is adjusted by using the water pressure of water injection, and when the ball valve is opened, sand remained in a well can be effectively removed.

Publication (bulletin) No.: CN203035155U, publication (public notice) day: 2013-07-03 relates to an oil-water well downhole operation tool, in particular to a trigger type oil pipe plug. The device's lower end head upper end is connected with well core rod, slips track upper end is connected with the center tube, install well core rod in the center tube, well core rod upper end is connected with the trip bar, install the rubber packing between lower end and the slips track, the slips tooth is installed on slips track and string tooth body, well core rod overcoat is equipped with the spring that rises to seal, rise to seal the spring upper end and top in well core rod's step department, the lower extreme pushes up on the interior step of center tube, it is fixed through the safety locating pin that string tooth body suit is on the center tube, the steel ball is equipped with in the groove of center tube and string tooth body, well core rod is last to open the recess that has the ability dress steel ball, the trigger cover suit is in the center tube outside, the slips spring is equipped with in the trigger cover. The utility model discloses an accessible free fall and steel wire winch deliver two kinds of modes and drop into in the pit, and the blanking plug is through triggering work, and it is accurate to throw stifled position, and the shutoff effect is reliable.

The technical scheme of the disclosed technology, the technical problems to be solved and the beneficial effects are all different from the technical scheme of the invention, or the technical field or the application occasion is different, and no technical inspiration exists in the technical scheme disclosed above.

Disclosure of Invention

The invention aims to provide an integrated pumping linkage pressurized rotary pumping pipe column, a plugging tool and a method aiming at the defects in the prior art. The plugging tool is put in from the blowout prevention pipe connected with the wellhead, and can be opened while being put in the inner cylinder of the oil well pump, so that the plugging tool is simple, convenient, safe and reliable; when the sucker rod is lifted, the pipe column is automatically sealed, so that the next operation and construction are facilitated; after the sucker rod is put out, plugging tools can be opened by putting weights such as a short joint of the sucker rod and the like, the oil sleeve is communicated, oil drainage of an oil pipe is realized, and the operation of spraying and lifting the oil pipe is avoided.

In order to achieve the purpose, the invention adopts the following technical scheme:

an integrated pumping linkage under-pressure rotary pumping pipe column comprises an oil well pump, a packer and a measure tool which are connected to an oil pipe, and the measure pipe column is formed by the oil well pump, the packer and the measure tool together, wherein the packer is positioned above the measure tool, and the oil well pump is positioned above the packer;

further comprising:

the preset working barrel is connected to the oil pipe and is positioned below the oil well pump;

the plugging tool is arranged inside the preset working barrel;

the upper end of the ejector rod is fixedly connected with an inner cylinder of an oil well pump of the oil well pump, the lower end of the ejector rod corresponds to the upper end of the plugging tool, and the plugging tool is controlled to be switched in a triggering mode.

Furthermore, the upper end and the lower end of the preset working barrel are provided with threads for connecting an oil pipe, two cavities with different diameters, namely an upper cavity and a lower cavity, are arranged in the preset working barrel from top to bottom, the inner diameter of the upper cavity is larger than that of the lower cavity, a limiting inclined plane is formed at the joint of the upper cavity and the lower cavity, and a locking step for expanding the diameter is arranged on the inner wall of the lower cavity.

Further, the occlusion tool comprises:

the plugging tool body is axially communicated, the outer wall of the upper half section of the plugging tool body is sealed with the inner wall of the upper cavity of the preset working barrel, the outer diameter of the lower half section of the plugging tool body is smaller than the inner diameter of the upper cavity of the preset working barrel, and the lower half section of the plugging tool body is provided with an upper channel which is radially communicated;

the piston sealing element is arranged on the outer wall of the piston, the piston is arranged in the plugging tool body, and the inner wall of the plugging tool body is provided with a limiting table for limiting the piston to move upwards; when the piston reaches the limiting table, the lowest end of the piston is higher than the upper channel; in an initial state, the piston is fixed at the position of the limit table through a shear pin;

the one-way valve is connected to the upper end of the plugging tool body, and the upper end of the one-way valve corresponds to the ejector rod;

the locking pipe, the locking pipe is to lining up, the locking pipe upper end is connected with shutoff instrument body lower extreme, the locking pipe first section external diameter is greater than the locking pipe second section external diameter, be the inclined plane between locking pipe first section and the locking pipe second section, the inclined plane with spacing inclined plane cooperation is spacing, locking pipe first section external diameter is less than and presets working barrel and goes up the cavity internal diameter, and locking pipe first section sets up the lower passageway that radially link up, locking pipe upper end mouth inner wall installation blind plate, the position that the blind plate was located is higher than the position that the passageway was located down.

Furthermore, the lower half section of the locking pipe is a split elastic locking claw, and the locking claw is inserted into the lower cavity of the preset working barrel and tightly clamps a step outside the locking claw on the locking step.

Further, the check valve includes:

the lower end of the valve cylinder is connected with the upper end of the plugging tool body;

the valve seat is arranged in the inner wall of the upper port of the valve barrel, the upper port of the valve barrel is connected with the gland, the lower end of the gland tightly presses the valve seat, the inner diameter of the gland is larger than the inner diameter of the valve seat, and the inner diameter of the valve seat is larger than the outer diameter of the ejector rod;

the valve ball is arranged in the valve barrel, and the diameter of the valve ball is larger than the inner diameter of the lower port of the valve seat;

the spring guide post is a round tube, holes are formed in the circumference of the round tube, the lower end of the spring guide post is connected to a porous plate, and the porous plate is fixed at the upper port of the plugging tool body;

and the lower end of the spring is sleeved on the spring guide post, and the upper end of the spring props against the valve ball.

In order to achieve the purpose, the invention adopts the following technical scheme:

an occlusion tool, comprising:

the plugging tool body is axially communicated, the outer wall of the upper half section of the plugging tool body is sealed with the inner wall of the upper cavity of the preset working barrel, the outer diameter of the lower half section of the plugging tool body is smaller than the inner diameter of the upper cavity of the preset working barrel, and the lower half section of the plugging tool body is provided with an upper channel which is radially communicated;

the piston sealing element is arranged on the outer wall of the piston, the piston is arranged in the plugging tool body, and the inner wall of the plugging tool body is provided with a limiting table for limiting the piston to move upwards; when the piston reaches the limiting table, the lowest end of the piston is higher than the upper channel; in an initial state, the piston is fixed at the position of the limit table through a shear pin;

the one-way valve is connected to the upper end of the plugging tool body, and the upper end of the one-way valve corresponds to the ejector rod;

the locking pipe is axially through, the upper end of the locking pipe is connected with the lower end of the plugging tool body, the outer diameter of the upper half section of the locking pipe is larger than that of the lower half section of the locking pipe, an inclined surface is arranged between the upper half section of the locking pipe and the lower half section of the locking pipe, the inclined surface is matched with the limiting inclined surface for limiting, the outer diameter of the upper half section of the locking pipe is smaller than the inner diameter of an upper cavity of a preset working barrel, a radially through lower channel is formed in the upper half section of the locking pipe, a blind plate is arranged on the inner wall of the upper end opening of the locking pipe, and the position of the blind plate is higher than that of the lower channel; the lower half section of the locking pipe is a split elastic locking claw, and the locking claw is inserted into the lower cavity of the preset working barrel and enables a step outside the locking claw to be clamped on the locking step.

Further, the check valve includes:

the lower end of the valve cylinder is connected with the upper end of the plugging tool body;

the valve seat is arranged in the inner wall of the upper port of the valve barrel, the upper port of the valve barrel is connected with the gland, the lower end of the gland tightly presses the valve seat, the inner diameter of the gland is larger than the inner diameter of the valve seat, and the inner diameter of the valve seat is larger than the outer diameter of the ejector rod;

the valve ball is arranged in the valve barrel, and the diameter of the valve ball is larger than the inner diameter of the lower port of the valve seat;

the spring guide post is a round tube, holes are formed in the circumference of the round tube, the lower end of the spring guide post is connected to a porous plate, and the porous plate is fixed at the upper port of the plugging tool body;

and the lower end of the spring is sleeved on the spring guide post, and the upper end of the spring props against the valve ball.

In order to achieve the purpose, the invention adopts the following technical scheme:

an integrated pumping and pressure-bearing combined pumping method comprises the following steps:

a preset working barrel is connected below the outer barrel of the rod-type oil well pump, when a plugging tool falls into the preset working barrel, along with the reduction of a gap, the well mouth pressurizing pressure rises, the inclined plane of the plugging tool reaches the limiting inclined plane of the preset working barrel, the outer diameter of the plugging tool shrinks under the elastic action of a locking claw and enters the lower working barrel, the step on the locking claw is above a locking step, then, under the action of the pressure in an oil pipe, a valve ball moves downwards to compress a spring, the liquid pressure acts on a piston, the piston drives the plugging tool to move downwards continuously along with the continuous rising of the pressure, when the step on the locking claw moves downwards to the lower part of the locking step, the locking claw expands under the elastic action, the step of the locking claw is clamped on the locking step, the plugging tool is locked with the preset working barrel, and the position of the plugging tool is limited;

the pressure in the oil pipe is continuously increased, when the stress of the piston is larger than the shearing force of the shear pin, the shear pin is sheared off, the piston falls onto the blind plate, at the moment, the upper channel is communicated with the lower channel, the plugging tool is communicated with the stratum, the pressure at the well head suddenly drops, and therefore the situation that the plugging tool is put down in place can be judged on the ground;

the pressure in the wellhead is relieved, the pressure in the oil pipe is reduced, the valve ball is quickly reset under the action of the spring, meanwhile, due to the action of the pressure of the ground pressure in the oil pipe at the lower part of the plugging tool, the pressure acts on the valve ball, the valve ball is matched with the ball seat, and the pressure in the oil pipe is sealed, so that the pressure in the oil pipe is prevented from being transmitted to the wellhead;

after the pressure in the oil pipe is effectively controlled, the rod-type oil well pump inner cylinder and the sucker rod can be lowered into the oil pipe from a well head, the lower part of the rod-type pump inner cylinder is connected with a push rod, the length of the push rod is determined according to the distance between the rod-type oil well pump outer cylinder and a preset working cylinder, after the rod-type oil well pump inner cylinder is ensured to be lowered to the proper position, the push rod can push open a valve ball, the valve ball moves down for a certain distance, so that the position of a ball seat is opened, an oil flow channel is formed, the position of the push rod is locked when the rod-type oil well pump inner cylinder is locked, and the position of the push rod can be changed only when the rod-type oil well pump inner cylinder moves;

the inner cylinder and the ejector rod of the rod-type oil well pump are put down in place, the oil flow channel is communicated, liquid in the well enters the oil well pump through the lower channel, the upper channel and the ball seat, ground oil pumping equipment is started, and the oil well pump lifts the well liquid to the ground, so that the pressurized rotary pumping operation construction of the integrated pumping and combined pipe column is realized.

Further, the method also comprises the following steps:

when next operation needs to lift out the sucker rod and the oil pipe in the well, if pressure still exists in the well, at the moment, the sucker rod is lifted, the sucker rod drives the inner cylinder of the rod type oil well pump and the ejector rod to move upwards, the valve ball is seated on the ball seat under the action of the spring and the pressure in the well, the pressure in the well is sealed, and the oil pipe and the sucker rod are safely lifted out. If no pressure exists in the well, after the sucker rod is lifted out, a plugging tool can be opened by throwing weights such as a short joint of the sucker rod and the like, the oil sleeve is communicated, oil drainage of the oil pipe is realized, and oil pipe spraying and lifting operation is avoided.

Further, the method comprises the following steps:

a preset working barrel is connected below the outer barrel of the rod-type oil well pump, and before a plugging tool falls into the preset working barrel, a pipe column channel above the measure tool is unblocked at the moment, so that measure construction can be carried out, or a test tool is put into the pipe column channel for test construction;

after the measure construction, if the phenomenon of self-blowing occurs, the oil pipe has pressure, when the inner cylinder of the oil well pump and the sucker rod are required to be pressed down under pressure to pump, the blowout prevention pipe is installed from the wellhead, the plugging tool is placed into the blowout prevention pipe, the gate of the wellhead is opened, the plugging tool falls down along the oil pipe under the action of gravity, if the viscosity of liquid in the well is high, the plugging tool is pressed from the wellhead to the oil pipe when being difficult to place, and the plugging tool is pushed to fall down.

Compared with the prior art, the invention has the following beneficial effects:

the integrated pumping column is connected before the working barrel is preset, if self-spraying occurs, a plugging tool can be put in, if no pressure exists, normal construction can be carried out, and normal construction procedures are not affected.

The plugging tool is put in from a blowout prevention pipe connected with a wellhead, and can be conveyed to a preset position in various modes such as pumping, steel wire rope delivery, gravity delivery and the like, so that the construction is safe and reliable;

the plugging tool is opened mechanically, so that the plugging tool can be opened while the inner cylinder of the oil well pump is put in, and the plugging tool is simple, convenient, safe and reliable;

when the sucker rod is lifted, the pipe column is automatically sealed, so that the next operation and construction are facilitated;

after the sucker rod is put out, plugging tools can be opened by putting weights such as a short joint of the sucker rod and the like, the oil sleeve is communicated, oil drainage of an oil pipe is realized, and the operation of spraying and lifting the oil pipe is avoided.

When the integrated pumping combined pipe column is put down, a preset working barrel is installed on the lower portion of an outer barrel of an oil well pump, after technological measures (fracturing, acidizing, perforating, testing and the like) are completed, if a self-spraying phenomenon occurs and the yield is reduced by pressure and the yield does not meet the production allocation requirement, a blowout prevention pipe is installed at a well mouth, a pipe column plugging tool is put into the underground pipe column, the plugging tool and the preset working barrel are locked through a locking device, and a sealing piece seals the preset working barrel, so that the pipe column is sealed. At the moment, no pressure exists in the pipe column, and the sucker rod and the inner cylinder of the oil well pump can be quickly and safely put in under the condition of no pressure. Before the sucker rod is put down, a plugging tool opening device is arranged on the lower portion of the inner cylinder of the oil well pump, and when the inner cylinder of the oil well pump is put down in place, the plugging tool opening device opens the plugging tool to form an oil flow channel, so that pumping can be achieved. The technology can be applied to an integrated pumping combined pipe column, and has low input cost and better application prospect.

Drawings

FIG. 1 is a schematic structural diagram of an integrated pumping combined pressurized rotary pumping column according to the present invention;

FIG. 2 is a schematic structural view of a preset mandrel;

FIG. 3 is a schematic view of the plugging tool of the present invention;

FIG. 4 is a schematic view of the placement of a plugging tool in place;

fig. 5 is a schematic view of the opening oil flow passage of the plugging tool.

In the figure: 1, 2, 3, a preset working barrel, 4 plugging tools, 5 ejector rods, 6 sleeves, 7 packers, 8 measure tools, 9, a manual shaft bottom, 10, an inner barrel of an oil well pump and 11, wherein the oil pipe is arranged in the oil well pump;

3.1 an upper connector, 3.2 a preset working barrel body, 3.3 a limiting inclined plane, 3.4 a locking step and 3.5 a lower connector;

4.1 gland, 4.2 ball seats, 4.3 valve balls, 4.4 springs, 4.5 spring guide posts, 4.6 plugging tool bodies, 4.7 sealing pieces, 4.8 pistons, 4.9 piston sealing pieces, 4.10 shear pins, 4.11 upper channels, 4.12 blind plates, 4.13 lower channels, 4.14 inclined planes, 4.15 steps and 4.16 locking claws.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figure 1, when a measure pump is put in and is connected with a pipe column, a preset working barrel 3 is connected to the lower part of a rod-type oil well pump outer barrel 2, the rod-type pump outer barrel 2 is connected with an upper oil pipe 1, the preset working barrel 3 is connected with a lower oil pipe 1, and the lower oil pipe 1 is connected with a packer 7 or a measure tool 8 and the like required by measure construction. When pressure exists in the well, the plugging tool 4 is thrown into the well from the well mouth to seal the oil pipe, the ejector rod 5 is installed on the lower portion of the rod type pump inner cylinder, and the plugging tool 4 can be opened to form an oil flow channel when the rod type pump inner cylinder is put down in place to perform pumping production.

As shown in fig. 2, the preset working barrel 3 has a certain drift diameter, no barrier exists in the middle, construction is convenient, and the drift diameter of the preset working barrel 3 is smaller than or equal to that of the rod-type pump outer barrel 2.

The lower part of the preset working barrel 3 is provided with a limiting inclined plane 3.3 for positioning the accurate falling position of the plugging tool 4.

The lower part of the preset working barrel 3 is provided with a locking step 3.4 which is matched with a step of a locking claw 4.16 of the plugging tool 4 to prevent the plugging tool 4 from moving upwards under the action of pressure in the well.

The inner diameter of the lower part of the inclined plane 3.3 of the preset working barrel 3 is smaller than the outer diameter of the locking claw 4.16 of the plugging tool 4 in a free state.

The limiting inclined plane 3.3 and the locking step 3.4 designed by the preset working barrel 3 are respectively matched with the inclined plane 4.14 of the plugging tool 4 and the step 4.15 of the locking claw 4.16, so that the position of the plugging tool 4 is accurately limited and cannot move up and down.

As shown in fig. 3, the upper end of the plugging tool 4 is designed with an inverted ball seat 4.2 and a valve ball 4.3, and the valve ball 4.3 is matched with the ball seat 4.2, so that the sealing of the pressure in the well can be realized, and the liquid pressure at the lower part of the oil pipe is prevented from being transmitted to the wellhead.

A spring 4.4 is arranged on a spring guide column 4.5 arranged inside the plugging tool 4, and the spring 4.4 has pretightening force to act on the valve ball 4.3 to force the valve ball 4.3 to reset quickly.

The vertical pipe of the spring guide column 4.5 of the plugging tool 4 is of a hollow structure, holes are formed in the vertical pipe and the lower fixing plate, and the holes are oil flow channels of liquid, so that the circulation of the liquid and the transmission of pressure are realized.

The plugging tool 4 is provided with a piston 4.8, a piston sealing element 4.9 is mounted on the piston 4.8, the upper surface of the piston 4.8 is matched with a step in the plugging tool to limit the upper plane position of the piston, and meanwhile, acting force at the lower part of the piston is transmitted to the step. The piston 4.8 is fixed by means of the shear pin 4.10, the acting force of the upper part of the piston 4.8 is transmitted to the shear pin 4.10, and the size and the number of the shear pins 4.10 are set according to actual conditions.

The sealing element 4.7 is designed outside the plugging tool body 4.6 of the plugging tool 4 and used for sealing the pressure between the plugging tool 4 and the preset working barrel 3, and the sealing element 4.7 is arranged at the upper part of the shear pin hole.

The lower part of the plugging tool 4 is provided with a blind plate 4.12 for receiving a piston 4.8 falling from the upper part, and an upper channel 4.11 and a lower channel 4.13 are arranged on upper and lower plugging tool bodies of the blind plate 4.12. The outer diameter of the plugging tool at the upper channel 4.11 and the lower channel 4.13 is smaller than that at the sealing element 4.7, an annular channel is formed between the plugging tool 4 and the preset working barrel 3, and liquid can be communicated between the upper channel 4.11 and the lower channel 4.13.

The lower end of the plugging tool 4 is designed with an inclined plane 4.14, the inclined plane 4.14 has the same inclination angle with the limiting inclined plane 3.3 of the preset working barrel 3, and the falling position of the plugging tool can be limited.

The lower end of the plugging tool 4 is provided with locking claws 4.16, the locking claws 4.16 are elastic elements, a plurality of locking claws are arranged on the circumference, strip holes are arranged between adjacent locking claws, the upper parts of the adjacent locking claws are connected to the same ring, and the lower parts of the adjacent locking claws are spaced by the strip holes and are not connected, so that the elastic performance of the locking claws 4.16 is improved.

The upper part of a locking claw 4.16 of the plugging tool 4 is designed with a step, and the locking claw is matched with a locking step 3.4 of a preset working barrel 3 to lock the plugging tool 4 and prevent the plugging tool from moving upwards.

The plugging tool 4 can be conveyed in place by adopting three conveying modes of pumping, steel wire rope conveying and gravity delivering. According to the difference of the viscosity of crude oil and the water content of the crude oil in the well, when the crude oil cannot fall in place by means of the dead weight of the tool, a pumping mode can be adopted, and the plugging tool is ensured to be lowered in place.

The specific construction method comprises the following steps:

before the measure construction, a measure tubular column is put in, a preset working barrel 3 is connected to the measure tubular column below the rod-type oil well pump outer barrel 2, at the moment, a tubular column channel above the measure tool is unblocked, and the measure construction can be carried out, or a test tool is put in for testing and other constructions.

After the measure construction, if the phenomenon of self-injection occurs, the oil pipe has certain pressure, when the inner cylinder 10 of the oil well pump and the sucker rod 11 need to be pressed down under pressure for rotary pumping, the blowout prevention pipe is installed from the wellhead, the plugging tool 4 is placed into the blowout prevention pipe, the gate of the wellhead is opened, the plugging tool 4 falls down along the oil pipe 1 under the action of gravity, if the viscosity of liquid in the well is high, the plugging tool is pressed from the wellhead to the oil pipe 1, the plugging tool 4 is pushed to fall down, when the plugging tool 4 falls into the preset working cylinder 3, the pressure of the wellhead is increased along with the reduction of the gap, the inclined surface 4.14 of the plugging tool 4 reaches the limiting inclined surface 3.3 of the preset working cylinder 3, the outer diameter is contracted under the elastic action of the locking claw 4.16 and enters the lower working cylinder, at the moment, the step 4.15 on the locking claw 4.16 is positioned above the locking step 3.4, and the plugging tool 4 and the preset working cylinder 3 are not locked. Then, under the action of the pressure in the oil pipe 1, the valve ball 4.3 moves downwards to compress the spring 4.4, the liquid pressure acts on the piston 4.8, along with the continuous rising of the pressure, the piston 4.8 drives the plugging tool 4 to move downwards continuously, when the step 4.15 on the locking claw 4.16 moves downwards to the position below the locking step 3.4, the locking claw 4.16 expands under the elastic action, the step 4.15 of the locking claw 4.16 is clamped on the locking step 3.4, the plugging tool 4 is locked with the preset working barrel 3, and the position of the plugging tool 4 is limited. And (3) continuing to increase the pressure in the oil pipe, when the stress of the piston 4.8 is greater than the shearing force of the shear pin 4.10, shearing the shear pin 4.8, enabling the piston 4.8 to fall onto the blind plate 4.12, communicating the upper channel 4.11 with the lower channel 4.13 at the moment, communicating the plugging tool 4 with the stratum, and suddenly reducing the pressure at the well head, so that the situation that the plugging tool is put down in place can be judged on the ground. Well head pressure release, oil pipe internal pressure reduces, and valve ball 4.3 resets fast under spring 4.4's effect, simultaneously because the effect that has the ground pressure in the 4 lower parts of shutoff instrument oil pipe, pressure acts on valve ball 4.3, and valve ball 4.3 and 4.2 cooperations of ball seat seal oil pipe internal pressure to prevent that oil pipe internal pressure from transmitting to the well head. As shown in fig. 4.

After the pressure in the oil pipe is effectively controlled, the rod-type oil-well pump inner cylinder 10 and the sucker rod 11 can be put into the oil pipe from the well head. The lower part of the rod-type pump inner cylinder 10 is connected with a mandril 5, the length of the mandril 5 is determined according to the distance between the rod-type oil well pump outer cylinder 2 and the preset working cylinder 3, and after the rod-type oil well pump inner cylinder 10 is put down in place, the mandril 5 can push the valve ball 4.3 open. The mandril 5, the rod type oil well pump inner cylinder 10 and the sucker rod 11 are sequentially put into the well mouth oil pipe, the rod type oil well pump inner cylinder 10 is put down to the right position and locked with the oil well pump outer cylinder 2, meanwhile, the mandril 5 pushes the valve ball 4.3 open, the valve ball 4.3 moves downwards for a certain distance, and therefore the ball seat 4.2 is opened, and an oil flow channel is formed. The rod pump inner cylinder 10 is locked, and the position of the push rod 5 can be changed only when the rod pump inner cylinder 10 moves. As shown in fig. 5.

The inner cylinder 10 of the rod-type oil well pump and the ejector rod 5 are put down in place, the oil flow channel is opened, the liquid in the well enters the oil well pump through the lower channel 4.13, the annular space where the working cylinder 3 and the plugging tool 4 are preset, the upper channel 4.11 and the ball seat 4.2, the ground oil pumping equipment is started, and the oil well pump lifts the well liquid to the ground, so that the pressurized rotary pumping operation construction of the integrated pumping and connecting pipe column is realized.

When next operation needs to lift out the sucker rod and the oil pipe in the well, if pressure still exists in the well, at the moment, only the sucker rod 11 needs to be lifted, the sucker rod drives the rod type oil well pump inner cylinder 10 and the ejector rod 5 to move upwards, the valve ball 4.3 is seated on the ball seat 4.2 under the action of the spring 4.4 and the pressure in the well, the pressure in the well is sealed, and the oil pipe 1 and the sucker rod 11 are safely lifted out. If no pressure exists in the well, after the sucker rod is lifted out, a plugging tool can be opened by throwing weights such as a short joint of the sucker rod and the like, the oil sleeve is communicated, oil drainage of the oil pipe is realized, and oil pipe spraying and lifting operation is avoided.

The sealing structure of the valve ball 4.3 and the ball seat 4.2 in the invention can be replaced by other sealing structure forms with the same function, such as cone valve sealing, plate valve sealing and the like.

The sealing structure of the piston 4.8 in the invention can be replaced by other structural forms with the same function, and the aim is to ensure that the plugging tool 4 is smoothly lowered and locked when the plugging tool 4 is difficult to lower.

1. The integrated pumping column is connected before the working barrel is preset, if self-spraying occurs, a plugging tool can be put in, if no pressure exists, normal construction can be carried out, and normal construction procedures are not affected.

2. The plugging tool is put in from a blowout prevention pipe connected with a wellhead, and can be conveyed to a preset position in various modes such as pumping, steel wire rope delivery, gravity delivery and the like, so that the construction is safe and reliable;

3. the plugging tool is opened mechanically, so that the plugging tool can be opened while the inner cylinder of the oil well pump is put in, and the plugging tool is simple, convenient, safe and reliable;

4. when the sucker rod is lifted, the pipe column is automatically sealed, so that the next operation and construction are convenient

5. After the sucker rod is put out, plugging tools can be opened by putting weights such as a short joint of the sucker rod and the like, the oil sleeve is communicated, oil drainage of the oil pipe is realized, and spraying and lifting operations are avoided.

The method comprises the steps of carrying out measure construction on an oil well, installing a preset working barrel at the lower part of an outer barrel of the oil well pump when an integrated pump is put into the oil well pump to form a pipe column, installing a blowout prevention pipe at a well mouth after technological measures (fracturing, acidizing, perforating, testing and the like) are finished and if a self-blowing phenomenon occurs and the yield is reduced by pressure and cannot meet the production allocation requirement, putting a pipe column plugging tool into the underground pipe column, locking the plugging tool and the preset working barrel through a locking device, and sealing the preset working barrel by a sealing piece so as to seal the pipe column. At the moment, no pressure exists in the pipe column, and the sucker rod and the inner cylinder of the oil well pump can be quickly and safely put in under the condition of no pressure. Before the sucker rod is put down, a plugging tool opening device is arranged on the lower portion of the inner cylinder of the oil well pump, and when the inner cylinder of the oil well pump is put down in place, the plugging tool opening device opens the plugging tool to form an oil flow channel, so that pumping can be achieved. The technology can be applied to an integrated pumping combined pipe column, and has low input cost and better application prospect.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.