阅读说明：本技术 新式防喷锚定一体化工具 (Novel blowout prevention anchoring integrated tool ) 是由 梁伟成 梁闯 于 2020-06-09 设计创作，主要内容包括：本发明涉及一种新式防喷锚定一体化工具,包括防转部分,丢开部分,泄压通道部分,锚定部分,重力活门部分及通杆,所述锚定部分包括支撑卡瓦；所述防转锚的上接头与螺杆泵下端连接；所述防转锚的下接头与筛管连接,所述筛管下端与丢手封隔器的连接接头连接；所述连接杆下端与通杆连接；所述泄压通道的上接头与丢手封隔器的下接头连接；所述支撑卡瓦的上接头与泄压通道的下接头连接；所述重力活门的上接头与支撑卡瓦的中心管连接；所述重力活门的下接头通过螺纹与油管连接。本装置防转效果更加理想,防止手封隔器的长期使用后啮合力不足导致失效,泄压通道部分可避免作业时管柱上窜的危险,避免压裂后的井沉沙堆积导致浮子开关失效。(The invention relates to a novel blowout prevention anchoring integrated tool, which comprises an anti-rotation part, a releasing part, a pressure relief channel part, an anchoring part, a gravity valve part and a through rod, wherein the anchoring part comprises a supporting slip; the upper joint of the anti-rotation anchor is connected with the lower end of the screw pump; the lower joint of the anti-rotation anchor is connected with a sieve tube, and the lower end of the sieve tube is connected with the connecting joint of the releasing packer; the lower end of the connecting rod is connected with the through rod; the upper joint of the pressure relief channel is connected with the lower joint of the releasing packer; the upper joint of the supporting slip is connected with the lower joint of the pressure relief channel; the upper joint of the gravity valve is connected with a central pipe of the supporting slip; and the lower joint of the gravity valve is connected with the oil pipe through threads. The anti-rotation effect of the device is more ideal, the insufficient meshing force is prevented from causing failure after the hand packer is used for a long time, the danger of upward movement of the pipe column during operation can be avoided by the pressure relief channel part, and the float switch failure caused by accumulation of well sediment after fracturing is avoided.)

1. The novel blowout prevention anchoring integrated tool comprises an anti-rotation part, a releasing part, a pressure relief channel part, an anchoring part, a gravity valve part, a through rod and a sieve tube, wherein the anchoring part comprises a supporting slip; the method is characterized in that:

the anti-rotation part comprises an anti-rotation anchor, and the anti-rotation anchor comprises an upper joint, a central pipe, a slip, a fixing ring, a spacer ring, a baffle ring, a friction block, a friction body, a spring, a guide pin, a guide ring, a release pin, a guide sleeve, a clamp spring, a connecting sleeve, an anti-blowout pin, an anti-blowout movable plug and a lower joint; the lower end of the upper joint is connected with a central pipe, and the outer wall of the lower part of the upper joint is a conical surface which is used for anchoring slips; the slip and the friction block are fixed on the friction body through a fixing ring, a spacer ring, a baffle ring, a spring and a guide sleeve, the central pipe is provided with a track groove and is divided into a long channel and a short channel, and the guide pin is arranged in the track groove of the central pipe; the lower end of the central tube is provided with a pin groove, and the bottom of the release pin is arranged in the pin groove at the lower end of the central tube; the inner side of the guide sleeve is provided with a guide ring, and the guide ring is used for fixing a guide pin; the lower end of the central tube is provided with a clamp spring groove, the clamp spring is arranged in the clamp spring groove at the lower end of the central tube, the connecting sleeve is arranged at the lower end of the guide sleeve, and the connecting sleeve is connected with the lower joint; the outside of the clamp spring is provided with one-way teeth, and the inside of the front end of the connecting sleeve is provided with one-way teeth; the one-way teeth outside the clamp spring can be meshed with the one-way teeth inside the connecting sleeve; a blowout-preventing movable plug is arranged in the lower end of the central pipe and is fixed on the central pipe through a blowout-preventing pin;

the releasing part comprises a releasing packer, and the releasing packer comprises a connecting joint, a dead plug, a positioning ring, a fishing joint, a connecting rod, a releasing sleeve, an upper central tube, an outer sleeve, a baffle ring, a deblocking pin, a snap spring, a releasing pin, a connecting sleeve, two side rubber cylinders, a middle rubber cylinder, two gaskets, a lining sleeve, an upper cone, a shearing pin, a guide pin, a spring, a slip sleeve, a lower joint and a top ring; the connecting joint is connected with the connecting rod and inserted into the fishing joint, and the positioning ring is connected to the connecting joint; the dead plug is arranged in the connecting joint; the lower part of the salvaging connector is sequentially connected with a release sleeve, an outer sleeve and a connecting sleeve; an upper central tube is arranged in a gap between the outer sleeve and the connecting rod; the front end of the upper central tube is split, and the top ring is connected and fixed on the upper central tube through threads; the baffle ring is fixed on the upper central pipe through the unsealing pin; the clamp spring is arranged between the baffle ring and the top ring; the outer part of the clamp spring is provided with one-way teeth, and the inner part of the outer sleeve is provided with one-way teeth which can be meshed with the one-way teeth of the clamp spring; the bushing sleeve is arranged on the upper central tube and is in contact with the end face of the top ring; the connecting sleeve is fixed on the bushing through a release pin; the two side rubber cylinders, the middle rubber cylinder and the two gaskets are all sleeved on the bushing; the middle rubber cylinder is arranged between the two side rubber cylinders; the two gaskets are respectively arranged between the side rubber cylinder and the middle rubber cylinder; the upper cone is sleeved on the upper central pipe, is connected with the tail end of the bushing through threads and is fixed on the upper central pipe through short shearing pins; the spring and the slip are arranged at the position where the slip sleeve is opened, sleeved on the upper cone and fixed with the upper cone through the guide pin, and the slip is in contact with the inclined surface of the upper cone; the lower joint is connected with the upper central pipe and is in contact with the inclined surface of the slip;

the pressure relief channel part comprises a pressure relief channel, and the pressure relief channel comprises an upper joint, a central pipe, a copper gasket and a lower joint; the upper joint is sleeved with the central pipe and fixedly connected with the central pipe through a pin; the central pipe is provided with an opening, and the lower joint is connected with the central pipe; the copper gasket is sleeved outside the central tube and fixed between the upper joint and the lower joint;

the anchoring part comprises a supporting slip, and a central pipe of the supporting slip is provided with a track groove which is the same as the anti-rotation anchor;

the gravity valve part comprises a gravity valve, and the gravity valve comprises an upper connector, a central pipe, an outer pipe, a balancing weight I, a balancing weight II, a fixing block, a baffle, a pin shaft, a gear rack, a screw and a lower connector; the central pipe is inserted into an inner hole of the upper joint and welded; the fixed block is welded on the central tube; the baffle plate is welded with the gear rack and is connected to the fixed block through a pin shaft; a screw is arranged on the baffle plate far away from the pin shaft; the balancing weight I and the balancing weight II are welded together and are arranged between the central tube and the outer tube, and the balancing weight II is provided with a rack and is meshed with the rack in a tooth shape; the outer pipe is sleeved outside the central pipe, the balancing weight I and the balancing weight II and is connected with the upper joint; the lower joint is connected with the lower end of the outer pipe;

the upper joint of the anti-rotation anchor is connected with the lower end of the screw pump; the lower joint of the anti-rotation anchor is connected with a sieve tube, and the lower end of the sieve tube is connected with the connecting joint of the releasing packer; the lower end of the connecting rod is connected with the through rod; the upper joint of the pressure relief channel is connected with the lower joint of the releasing packer; the upper joint of the supporting slip is connected with the lower joint of the pressure relief channel; the upper joint of the gravity valve is connected with a central pipe of the supporting slip; and the lower joint of the gravity valve is connected with the oil pipe through threads.

2. The new blowout prevention anchor integration tool as claimed in claim 1, wherein: the supporting slip comprises an upper joint, a central pipe, a slip, a fixing ring, a retaining ring, a spacer ring, a friction block, a spring, a friction body, a guide sleeve and a guide pin; the outer wall of the upper joint is a conical surface used for anchoring a slip; the central pipe is provided with a track groove which is the same as the anti-rotation anchor, and the guide pin is arranged in the track groove; the slip and the friction block are fixed on the friction body through a fixing ring, a retaining ring, a spacer ring, a spring and a guide sleeve.

3. The new blowout prevention anchor integration tool as claimed in claim 1, wherein: the thickness of a clamp spring of the releasing packer is 4.5mm, the tooth depth of one-way teeth is 1.2mm, the tooth pitch is 3mm, and one-way teeth with the same size and the reverse tooth shape as the clamp spring are arranged inside the lower end of the outer sleeve.

Technical Field

The invention relates to the field of screw pumps and oil-well pumps, in particular to a novel blowout prevention anchoring integrated tool.

Background

At present, the water plugging pipe column and the production pipe column need to be pulled out and put down twice continuously, so that the operation time is increased, and the construction cost is increased. The existing blowout-prevention anchoring integrated tool can realize one-trip pipe column well descending, but the anti-rotation effect of the plate turning anchor is not ideal in practical use, when the old-style releasing packer is released, the prior anchoring of the slips easily causes incomplete sealing of a rubber sleeve, and the structure of a float switch cannot pass through a testing instrument.

The main problems include the following: (1) the condition that a tool fails due to the breakage of a leaf spring often occurs in the anti-reverse use of the plate-turning anchor in the screw pump well; (2) the existing release packer has the structure that a rubber sleeve seat is compressed firstly and then the slips are compressed for anchoring, so that the rubber sleeve seat can continuously move downwards for a certain distance in a sleeve after being completely sealed, and the release mode can cause certain abrasion on the rubber sleeve and influence the sealing effect; (3) the existing clamp spring is weak in structure, and when the clamp spring is used in a well for a long time, the unidirectional teeth are meshed and loosened due to corrosion, vibration and the like of well fluid, so that the packer is unsealed in advance; (4) when the conventional clamp spring seat structure (figure 9) is released by a releasing packer, a release load is transmitted to the clamp spring seat from a clamp spring and then transmitted to the deblocking pin, if the release load is too large, the deblocking pin is directly sheared during release, so that the clamp spring fails to be sealed, and the deblocking pin is installed on the clamp spring seat to limit the size of the deblocking pin, so that the thread length of the deblocking pin is insufficient, and the deblocking pin is not stable and reliable; (5) the anti-ejection slip structure used by the existing releasing packer is of a rail type (figure 11), and the slip can not extend out or retract due to the fact that the structure is blocked in a rail due to well fluid corrosion, scaling and the like after being used for a long time; (6) the existing integrated tool structure is not provided with a pressure relief part, and if the situation that the releasing packer is jacked up due to the failure of a jacking-preventing slip occurs, the pressure at the lower part cannot be released, so that dangerous accidents are easy to occur; (7) the inside solid float that is of current float switch structure can't pass through test instrument and can lead to float switch inefficacy in the more condition of fracturing well sand setting.

Aiming at the situation, the invention designs a novel blowout prevention and anchoring integrated tool, and can effectively solve a plurality of defects of the original tool in use.

Disclosure of Invention

In order to make up the defects of the prior art, the invention aims to provide a novel blowout prevention and anchoring integrated tool which is more ideal in anti-rotation effect, more complete in setting of a rubber sleeve, capable of preventing failure caused by insufficient meshing force after long-term use of a hand packer, capable of effectively avoiding failure caused by cutting off of an unsealing pin in advance during release, and capable of avoiding the situation that a slip cannot be withdrawn during unsealing, and capable of preventing a releasing part from continuously jacking up and avoiding the danger of upward movement of a pipe column during operation; the gravity valve can avoid the float switch from losing efficacy caused by the accumulation of the sediment in the fractured well.

The invention aims to realize the technical scheme that the novel blowout prevention and anchoring integrated tool comprises an anti-rotation part, a releasing part, a pressure relief channel part, an anchoring part, a gravity valve part, a through rod and a sieve tube, wherein the anchoring part comprises a supporting slip; the technical key points are as follows:

the anti-rotation part comprises an anti-rotation anchor, the anti-rotation anchor comprises an upper joint, a central pipe, a slip, a fixing ring, a spacer ring, a baffle ring, a friction block, a friction body, a spring, a guide pin, a guide ring, a release pin, a guide sleeve, a clamp spring, a connecting sleeve, an anti-blowout pin, an anti-blowout movable plug and a lower joint;

the lower end of the upper joint is connected with a central pipe, and the outer wall of the lower part of the upper joint is a conical surface which is used for anchoring slips; the slip and the friction block are fixed on the friction body through a fixing ring, a spacer ring, a baffle ring, a spring and a guide sleeve, the central pipe is provided with a track groove and is divided into a long channel and a short channel, and the guide pin is arranged in the track groove of the central pipe; the lower end of the central tube is provided with a pin groove, and the bottom of the release pin is arranged in the pin groove at the lower end of the central tube; the inner side of the guide sleeve is provided with a guide ring, and the guide ring is used for fixing a guide pin; the lower end of the central tube is provided with a clamp spring groove, the clamp spring is arranged in the clamp spring groove at the lower end of the central tube, the connecting sleeve is arranged at the lower end of the guide sleeve, and the connecting sleeve is connected with the lower joint; the outside of the clamp spring is provided with one-way teeth, and the inside of the front end of the connecting sleeve is provided with one-way teeth; the one-way teeth outside the clamp spring can be meshed with the one-way teeth inside the connecting sleeve; a blowout-preventing movable plug is arranged in the lower end of the central pipe and is fixed on the central pipe through a blowout-preventing pin;

the releasing part comprises a releasing packer, and the releasing packer comprises a connecting joint, a dead plug, a positioning ring, a fishing joint, a connecting rod, a releasing sleeve, an upper central tube, an outer sleeve, a baffle ring, a deblocking pin, a snap spring, a releasing pin, a connecting sleeve, two side rubber cylinders, a middle rubber cylinder, two gaskets, a lining sleeve, an upper cone, a shearing pin, a guide pin, a spring, a slip sleeve, a lower joint and a top ring;

the connecting joint is connected with the connecting rod and inserted into the fishing joint, and the positioning ring is connected to the connecting joint; the dead plug is arranged in the connecting joint; the lower part of the salvaging connector is sequentially connected with a release sleeve, an outer sleeve and a connecting sleeve; an upper central tube is arranged in a gap between the outer sleeve and the connecting rod; the front end of the upper central tube is split, and the top ring is connected and fixed on the upper central tube through threads; the baffle ring is fixed on the upper central pipe through the unsealing pin; the clamp spring is arranged between the baffle ring and the top ring; the bushing sleeve is arranged on the upper central tube and is in contact with the end face of the top ring; the connecting sleeve is fixed on the bushing through a release pin; the two side rubber cylinders, the middle rubber cylinder and the two gaskets are all sleeved on the bushing; the middle rubber cylinder is arranged between the two side rubber cylinders; the two gaskets are respectively arranged between the side rubber cylinder and the middle rubber cylinder; the upper cone is sleeved on the upper central pipe, is connected with the tail end of the bushing through threads and is fixed on the upper central pipe through short shearing pins; the spring and the slip are arranged at the position where the slip sleeve is opened, sleeved on the upper cone and fixed with the upper cone through the guide pin, and the slip is in contact with the inclined surface of the upper cone; the lower joint is connected with the upper central pipe and is in contact with the inclined surface of the slip;

the pressure relief channel part comprises a pressure relief channel, and the pressure relief channel comprises an upper joint, a central pipe, a copper gasket and a lower joint; the upper joint is sleeved with the central pipe and fixedly connected with the central pipe through a pin; the central tube is provided with an opening, and the lower joint is connected with the central tube; the copper gasket is sleeved outside the central tube and fixed between the upper joint and the lower joint;

the anchoring part comprises a supporting slip, the supporting slip is provided, a central pipe of the supporting slip is provided with a track groove which is the same as the anti-rotation anchor, and a guide pin I of the supporting slip 4 is arranged in the track groove;

the gravity valve part comprises a gravity valve, and the gravity valve comprises an upper connector, a central pipe, an outer pipe, a balancing weight I, a balancing weight II, a fixing block, a baffle, a pin shaft, a gear rack, a screw and a lower connector; the central pipe is inserted into an inner hole of the upper joint and welded; the fixed block is welded on the central tube; the baffle plate is welded with the gear rack and is connected to the fixed block through a pin shaft; a screw is arranged on the baffle plate far away from the pin shaft; the balancing weight I and the balancing weight II are welded together and are arranged between the central tube and the outer tube, and the balancing weight II is provided with a rack and is meshed with the rack in a tooth shape; the outer pipe is sleeved outside the central pipe, the balancing weight I and the balancing weight II and is connected with the upper joint; the lower joint is connected with the lower end of the outer pipe.

Furthermore, an upper joint of the anti-rotation anchor is connected with the lower end of the screw pump; the lower joint of the anti-rotation anchor is connected with a sieve tube, and the lower end of the sieve tube is connected with the connecting joint of the releasing packer; the lower end of the connecting rod is connected with the through rod; the upper joint of the pressure relief channel is connected with the lower joint of the releasing packer; the upper joint of the supporting slip is connected with the lower joint of the pressure relief channel; the upper joint of the gravity valve is connected with a central pipe of the supporting slip; and the lower joint of the gravity valve is connected with the oil pipe through threads.

Furthermore, the supporting slip comprises an upper joint, a central pipe, a slip I, a fixing ring I, a baffle ring I, a spacer ring I, a friction block I, a spring I, a friction body I, a guide sleeve I and a guide pin I; the outer wall of the upper joint is a conical surface used for anchoring a slip; the center is provided with a track groove which is the same as the anti-rotation anchor, and the guide pin I is arranged in the track groove; slips I and clutch block I are fixed on friction piece I through solid fixed ring I, fender ring I, spacer ring I, spring I to and uide bushing I.

Furthermore, the thickness of the clamp spring II is 4.5mm, the tooth depth of the one-way teeth is 1.2mm, the tooth pitch is 3mm, and the one-way teeth with the same size and the reverse tooth shape as the clamp spring II are arranged in the lower end of the outer sleeve.

The invention has the beneficial effects that:

1. the anti-rotation anchor 1 is used for replacing a plate-turning anchor, the anti-rotation effect is more ideal, the anti-rotation success rate of the screw pump can reach 100% through field batch test verification, and the release pins 1-12 are designed to be matched with the supporting slips to be used downhole at the same time and are not mutually influenced.

2. The bush 2-17 of the releasing packer 2 is matched with the shear pin 2-19 for use (figure 7), so that the first anchoring of the slips 2-22 can be realized, the sequence of the side packing element 2-14 and the middle packing element 2-15 is set, the packing elements can be set more completely, the packing elements are not displaced after being set, the packing elements are effectively protected, and the sealing effect is better.

3. The thickness of a clamp spring II 2-11 (figure 8) of the releasing packer 2 is increased from 3mm to 4.5mm, the tooth depth of a one-way tooth is increased from 0.7mm to 1.2mm, the tooth pitch is increased from 2mm to 3mm, meanwhile, the inner part of the outer sleeve 2-8 is provided with a reverse tooth shape with the same size as that of the clamp spring II 2-11, after the releasing of the releasing packer 2 is completed, the meshing force of the clamp spring II 2-11 and the outer sleeve 2-8 is multiplied, and failure caused by insufficient meshing force after long-term use can be effectively prevented.

4. The clamp spring seat of the original releasing packer is cancelled, the blocking ring 2-9 and the top ring 2-26 are used for replacing (figure 10), when the releasing packer 2 is released, the impact force of the releasing load on the clamp spring II 2-11 is completely transmitted to the top ring 2-26, the deblocking pin 2-10 is prevented from bearing the load, failure caused by premature shearing of the deblocking pin 2-10 during releasing can be effectively avoided, the deblocking pin 2-10 is installed on the blocking ring 2-9, enough space is provided for lengthening the thread length of the deblocking pin 2-10, and the releasing packer is more stable and reliable.

5. The structure of the anti-jacking slips 2-22 of the releasing packer 2 is changed into a window type structure (figure 12), so that the situation that the slips cannot be withdrawn during deblocking can be avoided.

6. The pressure relief channel part is arranged, the hole of the central pipe 3-3 can communicate an oil pipe with a sleeve pipe during fishing, liquid in the oil pipe is released into an oil sleeve annulus to prevent the oil pipe from discharging liquid, and when secondary operation is carried out, if the releasing part moves upwards due to the failure of the anti-jacking slips 2-22, the upper joint 3-1 of the pressure relief channel 3 moves upwards at the same time, the hole of the central pipe 3-3 can also be released to release the bottom hole pressure, the pressure relief function is realized, the releasing part is prevented from continuing to push upwards, and the danger of string jumping during operation is avoided.

7. The gravity valve 5 is used for replacing a float switch, the tool length is shortened, the structure is simpler, the sealing function of the baffle 5-7 and the central tube 5-2 is realized by means of the gravity action of the balancing weight I5-4 and the balancing weight II 5-5, the sealing function is more effective and reliable, the baffle 5-7 structure can prevent the float switch from losing efficacy due to sand deposition accumulation of a fractured well, and when the gravity valve 5 is matched with the hollow through rod 6 for use, the annular space testing well can be used, and a testing instrument can pass through the hollow through rod 6.

Drawings

FIG. 1 is a schematic view of the structure of an anti-rotation part (anti-rotation anchor 1) of the present invention;

FIG. 2 is a schematic view of the construction of the release section (release packer 2) of the present invention;

FIG. 3 is a schematic view of the structure of the pressure relief passage (pressure relief passage 3) of the present invention;

FIG. 4 is a schematic view of the anchoring portion (support slips 4) of the present invention;

FIG. 5 is a schematic view of the structure of the gravity valve portion (gravity valve 5) of the present invention;

FIG. 6 is a schematic view of the construction of the stem portion (stem 6) of the present invention;

FIG. 7 is a schematic view of the construction of the bushings 2-17 of the present invention;

FIG. 8 is a schematic structural diagram of clamp springs I1-14 and clamp springs II 2-11 of the present invention;

FIG. 9 is a schematic view of a conventional clamp spring seat;

FIG. 10 is a schematic structural view of a snap spring II 2-11, a baffle ring 2-9, a top ring 2-26 and the like of the invention;

FIG. 11 is a schematic view of a slip configuration of a prior art release packer;

FIG. 12 is a schematic structural view of slips 2-22 and slip sleeves 2-23 of the packer of the present invention;

FIG. 13 is a schematic view of the tool attachment of the present invention (split);

fig. 14 is a tool connection schematic (overall) of the present invention.

The names of the structures in fig. 1-14 are: an anti-rotation anchor 1, an upper joint 1-1, a central pipe 1-2, slips 1-3, a fixing ring 1-4, a spacer ring 1-5, a baffle ring 1-6, a friction block 1-7, a friction body 1-8, a spring 1-9, a guide pin 1-10, a guide ring 1-11, a release pin 1-12, a guide sleeve 1-13, a snap spring I1-14, a connecting sleeve 1-15, a blowout prevention pin 1-16, a blowout prevention movable plug 1-17, a lower joint 1-18 track groove I1-19, a release packer 2, a connecting joint 2-1, a dead plug 2-2, a positioning ring 2-3, a fishing joint 2-4, a connecting rod 2-5, a release sleeve 2-6, an upper central pipe 2-7, an outer sleeve 2-8 and a baffle ring 2-9, 2-10 parts of an unsealing pin, 2-11 parts of a snap spring II, 2-12 parts of a releasing pin, 2-13 parts of a connecting sleeve, 2-14 parts of two side rubber cylinders, 2-15 parts of a middle rubber cylinder, 2-16 parts of two gaskets, 2-17 parts of a bushing, 2-18 parts of an upper cone, 2-19 parts of a shearing pin, 2-20 parts of a guide pin, 2-21 parts of a spring, 2-22 parts of a slip, 2-23 parts of a slip sleeve, 2-24 parts of a locking nut, 2-25 parts of a lower joint, 2-26 parts of a top ring, 3 parts of a pressure relief channel, 3-1 parts of an upper joint, 3-2 parts of a pin, 3-3 parts of a central pipe; the device comprises the following components of 3-6 parts of an opening, 4 parts of a supporting slip, 4-1 parts of an upper joint, 4-2 parts of a central pipe, 4-3 parts of a slip I, 4-4 parts of a fixing ring I, 4-5 parts of a baffle ring I, 4-6 parts of a spacer ring I, 4-7 parts of a friction block I, 4-8 parts of a spring, 4-9 parts of a friction body I, 4-10 parts of a guide sleeve I, 4-11 parts of a guide pin I and 4-12 parts of a track groove II; the device comprises a gravity valve 5, an upper joint 5-1, a central pipe 5-2, an outer pipe 5-3, a balancing weight I5-4, a balancing weight II 5-5, a fixing block 5-6, a baffle 5-7, a pin shaft 5-8, a gear rack 5-9, a screw 5-10, a lower joint 5-11, a through rod 6 and a sieve pipe 7.

Detailed Description

The specific structure of this example is: a novel blowout prevention anchoring integrated tool comprises an anti-rotation part, a releasing part, a pressure relief channel part, an anchoring part, a gravity valve part, a through rod 6 and a sieve tube 7, wherein the anchoring part comprises a supporting slip 4;

the anti-rotation part comprises an anti-rotation anchor 1, wherein the anti-rotation anchor 1 comprises an upper connector 1-1, a central pipe 1-2, slips 1-3, a fixing ring 1-4, a spacer ring 1-5, a baffle ring 1-6, a friction block 1-7, a friction body 1-8, a spring 1-9, a guide pin 1-10, a guide ring 1-11, a release pin 1-12, a guide sleeve 1-13, a clamp spring I1-14, a connecting sleeve 1-15, a blowout prevention pin 1-16, a blowout prevention movable plug 1-17 and a lower connector 1-18;

the upper end of the upper joint 1-1 is connected with the lower end of the screw pump through threads, the lower end of the upper joint 1-1 is connected with the central pipe 1-2 through threads, the outer wall of the lower part of the upper joint 1-1 is a conical surface, and the conical surface is used for anchoring slips 1-3;

the slips 1-3 and the friction blocks 1-7 are fixed on the friction bodies 1-8 through fixing rings 1-4, spacer rings 1-5, baffle rings 1-6, springs 1-9 and guide sleeves 1-13,

the central pipe 1-2 is provided with track grooves I1-19 which are divided into long tracks and short tracks, and the bottom ends of the guide pins 1-10 are arranged in the track grooves I1-19 of the central pipe 1-2; the lower end of the central pipe 1-2 is provided with a pin groove, the bottom of the release pin 1-12 is arranged in the pin groove at the lower end of the central pipe 1-2 and used for fixing the friction body 1-8 through the release pin 1-12 when the well is lowered;

the inner sides of the guide sleeves 1-13 are provided with guide rings 1-11, the guide rings 1-11 are used for stabilizing guide pins 1-10, and the guide pins 1-10 move along track grooves on the central pipe 1-2 to control setting and unsealing of slips 1-3;

the lower end of the central tube 1-2 is provided with a clamp spring groove, the clamp spring I1-14 is arranged in the clamp spring groove at the lower end of the central tube 1-2, the connecting sleeve 1-15 is arranged at the lower end of the guide sleeve 1-13, and the connecting sleeve 1-15 is connected with a lower joint 1-18;

one-way teeth are arranged outside the clamp springs I1-14, and one-way teeth are arranged inside the front ends of the connecting sleeves 1-15; one-way teeth outside the clamp spring I1-14 can be meshed with one-way teeth inside the connecting sleeve 1-15;

after the tool is released, the central tube 1-2 drives the snap springs I1-14 to move downwards, the one-way teeth of the snap springs I1-14 are meshed with the one-way teeth of the connecting sleeves 1-15, and the positions of the central tube 1-2 and the connecting sleeves 1-15 can be fixed;

a blowout-preventing movable plug 1-17 is arranged inside the lower end of the central pipe 1-2 and is fixed on the central pipe 1-2 through a blowout-preventing pin 1-16, a sealing ring between the blowout-preventing movable plug 1-17 and the central pipe 1-2 realizes a blowout-preventing function during well descending, after release is completed, the blowout-preventing movable plug 1-16 can be sheared off by pressing 5MPa into an oil pipe, a channel in the oil pipe is opened, and the blowout-preventing movable plug 1-17 falls onto a dead plug 2-2 of a release packer 2 which is described below;

the upper ends of the lower joints 1 to 18 are connected to the connecting sleeves 1 to 15 through threads, and anti-loosening jackscrews are arranged at the threaded connection positions;

the releasing part comprises a releasing packer 2, and the releasing packer 2 comprises a connecting joint 2-1, a dead plug 2-2, a positioning ring 2-3, a fishing joint 2-4, a connecting rod 2-5, a release sleeve 2-6, an upper central pipe 2-7, an outer sleeve 2-8, a baffle ring 2-9, a deblocking pin 2-10, a snap spring II 2-11, a release pin 2-12, a connecting sleeve 2-13, two side rubber cylinders 2-14, a middle rubber cylinder 2-15, two gaskets 2-16, a bushing 2-17, an upper cone 2-18, a shearing pin 2-19, a guide pin 2-20, a spring 2-21, a slip 2-22, a slip sleeve 2-23, a locking nut 2-24, a lower joint 2-25 and a top ring 2-26;

the connecting joint 2-1 and the connecting rod 2-5 are connected through threads and inserted into the fishing joint 2-4, and the positioning ring 2-3 is connected to the connecting joint 2-1 through threads; the dead plug 2-2 is arranged in the connecting joint 2-1; the lower part of the fishing joint 2-4 is connected with a release sleeve 2-6, an outer sleeve 2-8 and a connecting sleeve 2-13 in sequence through threads; an upper central pipe 2-7 is arranged in a gap between the outer sleeve 2-8 and the connecting rod 2-5; the front end of the upper central tube 2-7 is split, and the top ring 2-26 is connected and fixed on the upper central tube 2-7 through threads; the baffle rings 2-9 are fixed on the upper central tubes 2-7 through deblocking pins 2-10; the clamp spring II 2-11 is arranged between the baffle ring 2-9 and the top ring 2-26; the bushing 2-17 is sleeved on the upper central pipe 2-7 and is contacted with the end face of the top ring 2-26; the connecting sleeves 2-13 are fixed on the bushings 2-17 through release pins 2-12;

the thickness of the clamp spring II 2-11 is 4.5mm, the tooth depth of the unidirectional teeth is 1.2mm, the tooth pitch is 3mm, and meanwhile, the inner part of the lower end of the outer sleeve 2-8 is provided with unidirectional teeth which have the same size and reverse tooth shape as the clamp spring II 2-11;

the side rubber cylinders 2-14 are arranged in an upper part and a lower part, and the middle rubber cylinder 2-15 is arranged between the upper side rubber cylinder 2-14 and the lower side rubber cylinder 2-14; the two side rubber cylinders 2-14, the middle rubber cylinder 2-15 and the two gaskets 2-16 are all sleeved on the bushings 2-17;

the upper side rubber cylinder 2-14 is contacted with the end face of the connecting sleeve 2-13, the other end face of the side rubber cylinder 2-14 is contacted with the gasket 2-16, the other end face of the gasket 2-16 is contacted with the middle rubber cylinder 2-15, the other end face of the middle rubber cylinder 2-15 is contacted with the gasket 2-16, and the other end face of the gasket 2-16 is contacted with the lower side rubber cylinder 2-14;

the upper cone 2-18 is sleeved on the upper central pipe 2-7, is connected with the tail end of the bushing 2-17 through threads and is fixed on the upper central pipe 2-7 through a shear pin 2-19; the three groups of springs 2-21 and slips 2-22 are arranged at the windowing part of the slip sleeve 2-23 and sleeved on the upper cone 2-18, and are fixed with the upper cone 2-18 through guide pins 2-20, and at the moment, the slips 2-22 are in contact with the inclined surface of the upper cone 2-18; the lower joints 2-25 are connected with the upper central pipe 2-7 through threads and are fixed by a jackscrew and a locking nut 2-24 at the threaded connection part, and the lower joints 2-25 are in inclined contact with slips 2-22.

The pressure relief channel part comprises a pressure relief channel 3, and the pressure relief channel 3 comprises an upper joint 3-1, a pin 3-2, a central pipe 3-3, a copper gasket 3-4 and a lower joint 3-5; the upper joint 3-1 and the central pipe 3-3 are sleeved together and fixed together through a pin 3-2; the upper joint 3-1 and the central pipe 3-3 are both provided with key slots which can transmit torque downwards when connected together; the central pipe 3-3 is provided with an opening 3-6, and the lower joint 3-5 is connected with the central pipe 3-3 through threads; the copper gasket 3-4 is sleeved outside the central tube 3-3 and fixed between the upper joint 3-1 and the lower joint 3-5, when the tool is released, the pin 3-2 is sheared, the upper joint 3-1 is displaced downwards under the weight of the tubular column and the release load to plug the open hole of the central tube 3-3, and meanwhile, the copper gasket 3-4 can be extruded between the upper joint 3-1 and the lower joint 3-5 to realize the sealing function;

the anchoring part comprises a supporting slip 4, and the supporting slip 4 comprises an upper connector 4-1, a central pipe 4-2, slips I4-3, a fixing ring I4-4, a retaining ring I4-5, a spacer ring I4-6, a friction block I4-7, a spring I4-8, a friction body I4-9, a guide sleeve I4-10 and a guide pin I4-11;

the outer wall of the upper joint 4-1 is a conical surface which is used for anchoring the slips 4-3; the central pipe 4-2 is provided with a track groove II 4-12 which is the same as the anti-rotation anchor 1, and the bottom end of the guide pin I4-11 is arranged in the track groove II 4-12;

the slip I4-3 and the friction block I4-7 are fixed on a friction body I4-9 through a fixing ring I4-4, a baffle ring I4-5, a spacer ring I4-6, a spring I4-8 and a guide sleeve I4-10;

the central pipe 4-2 is provided with a track groove which is the same as that of the anti-rotation anchor 1, in order to prevent two tools from being anchored at the same time, a pin groove is designed at the lower end of the central pipe 1-2 of the anti-rotation anchor 1, and is used for fixing friction bodies 1-8 and the like through release pins 1-12 when a well is lowered, so that the support slips 4 can be anchored firstly, then the release pins 1-12 are cut through a downward pressing oil pipe, and then guide pins 1-10 can enter the guide rails of the central pipe 1-2 to normally change rails and be anchored;

the gravity valve part comprises a gravity valve 5, and the gravity valve 5 comprises an upper connector 5-1, a central tube 5-2, an outer tube 5-3, a balancing weight I5-4, a balancing weight II 5-5, a fixing block 5-6, a baffle 5-7, a pin shaft 5-8, a gear rack 5-9, a screw 5-10 and a lower connector 5-11;

the central pipe 5-2 is inserted into an inner hole of the upper joint 5-1 and the two pieces are welded together; the fixed block 5-6 is provided with a pin shaft hole and is welded on the central pipe 5-2; the baffle plates 5-7 are welded with the gear bars 5-9 and connected to the fixing blocks 5-6 through pin shafts 5-8;

in order to prevent the pin shaft 5-8 from being broken due to overlarge shearing force, the position, far away from the pin shaft 5-8, of the baffle plate 5-7 is provided with the screw 5-10, so that the through rod 6 can contact the screw 5-10 firstly when the baffle plate 5-7 is poked open, the shearing force borne by the pin shaft 5-8 is reduced, and the purpose of protecting the pin shaft 5-8 is achieved;

the balancing weight I5-4 and the balancing weight II 5-5 are welded together, are placed under the constraint of the inner diameter of the outer pipe 5-3 and are fixed in an annular space between the central pipe 5-2 and the outer pipe 5-3, and the balancing weight II 5-5 is provided with a rack and is meshed with the rack 5-9 in a tooth shape; the outer pipe 5-3 is sleeved outside the central pipe 5-2, the balancing weight I5-4 and the balancing weight II 5-5 and is connected with the upper connector 5-1 through threads; the lower joint 5-11 is connected with the lower end of the outer pipe 5-3 through threads, and the eccentricity is consistent with that of the upper joint 5-1;

the novel connection mode of the blowout prevention and anchoring integrated tool is as follows:

referring to fig. 13, an upper joint 1-1 of the anti-rotation anchor 1 is connected with the lower end of the screw pump through threads; the lower joints 1-18 of the anti-rotation anchor 1 are connected with the sieve tube 7 through threads, and the threads at the lower end of the sieve tube 7 are connected with the connecting joint 2-1 of the releasing packer 2; the lower ends of the connecting rods 2 to 5 are connected with the through rod 6 through threads; an upper joint 3-1 of the pressure relief channel 3 is connected with a lower joint 2-25 of the releasing packer 2 through threads; an upper joint 4-1 of the supporting slip 4 is connected with a lower joint 3-5 of the pressure relief channel 3 through threads; an upper joint 5-1 of the gravity valve 5 is connected with a central pipe 4-2 of the supporting slip 4 through threads; and the lower joint 5-11 of the gravity valve 5 is connected with an oil pipe through threads.

The working principle and the application effect of the novel blowout prevention anchoring integrated tool are as follows:

1. the upper end of the novel blowout prevention anchoring integrated tool is connected with the lower end of the screw pump through threads, the lower end of the novel blowout prevention anchoring integrated tool is connected with an oil pipe through threads, the novel blowout prevention anchoring integrated tool is lowered to a preset depth in an oil well after connection is completed, the pipe column is lifted for a certain distance and then lowered, and the anchoring part is anchored on the inner wall of the sleeve.

2. And (3) pressing down the production pipe column for a certain load, shearing off the pin 3-2 of the pressure relief channel part, enabling the upper joint 3-1 to move downwards under the weight of the pipe column, plugging the open hole 3-6 of the central pipe 3-3, and simultaneously extruding the copper gasket 3-4 to realize the sealing function.

3. When the production pipe column is pressed down, the release pin 1-12 of the anti-rotation part is cut off, the central pipe 1-2 drives the snap spring I1-14 to enter the connecting sleeve 1-15, the snap spring I1-14 is meshed with the one-way teeth of the connecting sleeve 1-15 for positioning, and the guide pin 1-10 enters the guide rail of the central pipe 1-2, so that the rail can be normally replaced and anchored.

4. Continuing to press down the production string, driving the positioning ring 2-3, the fishing joint 2-4, the release sleeve 2-6, the outer sleeve 2-8 and the connecting sleeve 2-13 to simultaneously descend by the connection joint 2-1 of the lost part, transmitting a descending load to the lining 2-17 through the release pin 2-12, driving the side rubber cylinder 2-14, the gasket 2-16, the middle rubber cylinder 2-15 and the upper cone 2-18 to simultaneously descend by the lining 2-17, transmitting the descending load to the upper central pipe 2-7 through the shear pin 2-19, when the anchoring mechanism is anchored, the upper central pipe 2-7 is in a fixed state, therefore, when the downward pressure load is large enough, firstly shearing the weaker shear pin 2-19, and then the upper cone 2-18 descends to press the slips 2-22, the slips 2-22 are extruded out along the windowing part of the slip sleeve 2-23 and anchored on the inner wall of the sleeve to realize the anti-jacking function, after the slips 2-22 are anchored, a downward pressing load cuts the release pin 2-12, at the moment, the connecting sleeve 2-13 continues to downwards compress the side rubber cylinder 2-14 and the middle rubber cylinder 2-15 to complete rubber cylinder setting, when the rubber cylinder setting is completed, the outer sleeve 2-8 downwards moves enough, the one-way teeth on the outer sleeve 2-8 compress the one-way teeth of the open circular snap spring II 2-11, and under the expansion elasticity of the snap spring II 2-11, the one-way teeth can be ensured to be mutually meshed and positioned, so that the side rubber cylinder 2-14 and the middle rubber cylinder 2-15 are prevented from rebounding.

5. After the releasing part is released, the releasing sleeve 2-6 moves downwards and is positioned, the split front end of the upper central tube 2-7 is separated from the constraint of the releasing sleeve 2-6, and at the moment, the connecting joint 2-1, the positioning ring 2-3, the connecting rod 2-5 and the through rod 6 can be taken out by lifting the pipe column, so that the releasing action is finished.

6. And lifting the pipe column for a certain distance again and lowering the pipe column, and anchoring the anti-rotation anchor 1 on the inner wall of the sleeve to realize the anti-rotation function of the screw pump.

7. After the sucker rod and the ground driving part are installed, the sucker rod is pressed into the oil pipe, the blowout-preventing pin 1-16 of the anti-rotation anchor 1 is cut off, the blowout-preventing movable plug 1-17 falls into the dead plug 2-2 of the lost part, the bottom hole falling object accumulation caused by falling into the artificial bottom hole is prevented, and at the moment, the conventional oil extraction operation can be carried out.

8. When in workover operation, the production pipe column is lifted, the anti-rotation anchor 1 is un-anchored, the through rod 6 is pulled away from the gravity valve part, the balance weight I5-4 and the balance weight II 5-5 are matched with gear transmission under the action of gravity to rotate the baffle 5-7 around the pin shaft 5-8, and finally the baffle contacts and seals with the lower end surface of the central pipe 5-2, so that the blowout prevention function is realized during the workover operation.

9. During fishing operation, a fishing tool enters the inside of the releasing packer 2 and is matched with the fishing joint 2-4 in a threaded mode to lift the pipe column, a lifting load is transmitted to the baffle ring 2-9 through the snap spring II 2-11 and then transmitted to the deblocking pin 2-10, the upper central pipe 2-7 is fixed, so that the deblocking pin 2-10 can be cut off when the lifting load is large enough, the fishing joint 2-4, the release sleeve 2-6, the outer sleeve 2-8 and the connecting sleeve 2-13 simultaneously move upwards to make room, the side rubber cylinders 2-14, the middle rubber cylinders 2-15 and the slips 2-22 shrink under the effect of the resilience force of the rubber cylinders and the resilience force of the springs 2-21, and deblocking is completed. And continuously lifting to drive the upper joint 3-1 of the pressure relief channel 3 to move upwards, so that the opening position of the central pipe 3-3 is formed, the oil sleeve is communicated, and liquid in the oil pipe can flow into the annular space of the oil sleeve, so that liquid in the oil pipe is prevented from flowing out when the pipe string is lifted. If in normal production, the anti-jacking slips 2-22 of the releasing part are invalid, so that the releasing part moves upwards, the upper joint 3-1 of the pressure relief channel 3 moves upwards at the same time, the hole opening position of the central pipe 3-3 can also be set aside, the bottom hole pressure is released to realize the pressure relief function, the pipe column can be effectively prevented from jacking, and the danger of the pipe column jumping upwards during operation is avoided.