CN213419065U - Multifunctional hydraulic setting tool for one-trip pipe column - Google Patents

Abstract

The utility model discloses a multi-functional hydraulic pressure of one trip tubular column sits and seals instrument, mainly used carries out interim, permanent shutoff or secondary well cementation to oil, gas, water layer. The cement slurry is squeezed into the well section to be sealed in the annular space or into the cracks and pores in the stratum through the retainer, so that the aims of plugging and leakage repairing are fulfilled. The setting tool can realize one-time pipe column setting locking, cement paste squeezing, plugging anti-reverse spitting and lifting releasing operation, does not need a special setting tool, and has the advantages of simple operation steps, compact structure and low cost. Meanwhile, the operation of preventing reverse spitting and releasing is realized, and other underground operation operations can be quickly carried out after cement paste squeezing is finished. The releasing tool has double insurance, and the difficulty of subsequent underground operation caused by the failure of the releasing tool is avoided. The design of the inverted tooth buckle ensures the setting load and can still reliably set under the pressure change. The method can be particularly matched with the construction of sealing channeling, water plugging, fracturing, acidizing, testing and the like of a production well.

Description

Multifunctional hydraulic setting tool for one-trip pipe column

Technical Field

The utility model relates to an oil field oil well bores and adopts technical field, especially relates to a multi-functional hydraulic pressure of a string seals instrument.

Background

In the oil exploitation operation, the underground environment is complex, including factors affecting the underground operation such as high pressure, corrosion, landfill, cracks, pores and the like, and the normal operation of the underground operation is hindered, so that the operation tool needs to be improved and optimized, and the special operation tool is adopted in different operation modes to meet the requirements of the underground operation.

For the downhole environment with cracks and pores, the cracks and the pores need to be filled before operation, so that the underground geological formation can adapt to the strength of normal operation. The method generally adopts the mode that the cement slurry is squeezed and injected into cracks and pores, and the cement slurry is solidified to form a whole with the underground geological formation, so that the strength of the underground geological formation is improved, and the operation requirement is met. The tools used in the process of squeezing cement paste comprise a cement retainer on the well, a setting device under the well and a central pipe for connecting the retainer and the setting device. Before operation, the setting device needs to be placed to the designed depth in the well by using a special tool for setting, then a central pipe connected with the retainer is placed to the setting device for limiting, and finally cement slurry is squeezed into cracks and holes in the well through the retainer through the central pipe. The problems with this intermediate approach are:

1. the setting ware needs use specialized tool to transfer, transfers and lifts the instrument after accomplishing, carries out the connection of center tube again, and operating procedure is loaded down with trivial details, center tube and setting ware be assembled between-connected in the pit, and it is connected fastening nature and intensity relatively poor, breaks away from easily when holding the ware and suppress, has certain potential safety hazard.

2. After the cement paste bearing and remaining device is extruded and stopped, the cement paste in the cracks and the holes is easy to reversely flow into the central pipe, so that the central pipe and the bearing and remaining device are damaged, and meanwhile, the extruding quality of the geological layer cracks and the holes is poor, and the later operation is influenced.

3. After cement paste is squeezed and injected into the central pipe and the setting device connected in the underground, the central pipe is not easy to be released or the releasing is not easy to fail, and the later-stage underground operation is influenced.

SUMMERY OF THE UTILITY MODEL

To the problem that exists, the utility model aims at providing a multi-functional hydraulic pressure of a string sits and seals instrument, should sit and seal the instrument and can realize that a string sits and seals locking, grout is crowded to be annotated, the shutoff is prevented anti-telling and is lifted the releasing operation, does not need special seat to seal the instrument, and operating procedure is simple, and is with low costs.

In order to achieve the above object, the utility model adopts the following technical scheme: a multi-functional hydraulic pressure of tubular column sits and seals instrument, including cavity through connection's top connection, adapter sleeve, last center tube, lower center tube and guide shoe in proper order, wherein, be equipped with the ball seat device in the center tube down go up the center tube and center tube outer wall cover is equipped with sits the sealing device down, it is right to be equipped with on the adapter sleeve to be used for sitting the sealing device sit the hydraulic pressure mechanism that seals instrument is whole, the injection mouth that link up with lower center tube is seted up to the guide shoe lateral wall be equipped with between injection mouth and the lower center tube and prevent the anti-device of vomitting of anti-vomitting in the center tube down of injection mouth.

Preferably, the hydraulic mechanism comprises a piston hermetically sleeved on the outer wall of the connecting sleeve, a hydraulic hole for applying pressure to the piston towards the setting device is formed in the side wall of the connecting sleeve, a first shear pin connected with the piston is arranged at the top end of the connecting sleeve, and a locking ring for limiting the stroke of the piston is arranged at the bottom end of the connecting sleeve.

Preferably, the setting tool comprises a mandrel sleeved on the outer wall of the upper central tube and the outer wall of the lower central tube, the outer wall of the mandrel is sequentially sleeved with an upper slip, an upper cone, a sealing rubber cylinder, a lower cone and a lower slip, the upper slip abuts against the end part of a piston, the lower slip abuts against the end part of a guide shoe, the bottom end of the mandrel is tightly connected with the guide shoe, the top end of the mandrel is connected with a connecting tool used for setting and releasing the hands, and the setting tool further comprises a locking mechanism used for setting and locking.

Preferably, the locking mechanism is an inverted tooth structure which is arranged between the outer wall of the mandrel and the upper vertebral body and between the outer wall of the mandrel and the sealing rubber tube and used for locking the upper vertebral body and the sealing rubber tube in a one-way movement mode towards the shoe guiding direction, and second shear pins are arranged between the upper vertebral body and the mandrel and between the lower vertebral body and the mandrel.

Preferably, the connecting tool is a pulling sleeve and comprises an upper connecting part and a lower connecting part, wherein the upper connecting part is in positive-rotation threaded connection with the outer wall of the upper central tube, the lower connecting part is in reverse-rotation threaded connection with the inner wall of the mandrel, and a connecting part with rated releasing fracture tension is arranged at the joint of the upper connecting part and the lower connecting part.

Preferably, the coupling means is a fourth shear pin coupled between the mandrel and the upper base pipe at a circumferential spacing.

Preferably, the anti-reverse-flow device comprises a closing sleeve which is installed on the outer wall of the bottom end of the lower central tube in a matched mode, the closing sleeve comprises an elastic claw which is locked with the outer wall of the lower central tube and a tube part which is used for plugging the filling opening, and the outer wall of the elastic claw is in elastic sealing locking with the lower central tube through contact with the inner wall of the mandrel.

Preferably, the inner wall of the mandrel is provided with a groove for unlocking the elastic claw of the closing sleeve from the lower central tube, and the outer wall of the cylinder part of the mandrel corresponds to the injection opening and seals the injection opening in the unlocking state of the elastic claw and the groove.

Preferably, the ball seat device comprises a ball seat and a ball body which are sleeved in a lower central tube, and a third shear pin used for limiting the ball seat is arranged on the inner wall of the lower central tube.

The utility model has the advantages that: (1) the setting tool can realize one-time pipe column setting locking, cement paste squeezing, plugging anti-reverse spitting and lifting releasing operation, does not need a special setting tool, and has the advantages of simple operation steps, compact structure and low cost. (2) The closing sleeve can simultaneously realize the operation of anti-reverse spitting and releasing when cement paste is not solidified, so that other downhole operation operations can be quickly carried out after the cement paste is squeezed and injected. The adopted pull sleeve has double insurance when releasing the hand, thereby avoiding the difficulty of subsequent underground operation caused by the failure of releasing the hand. Meanwhile, the fourth shear pin can replace a pull sleeve to finish the operation modes of setting and releasing. (3) The design of the inverted tooth buckle ensures the setting load and can still reliably set under the pressure change. (4) The second shear pin can limit the positions of the upper cone and the upper slip, and the problem that the sealing rubber cylinder is squeezed and is not lowered to the preset depth and then is set halfway is solved. (5) The single rubber cylinder is easy to drill away in later operation.

Drawings

Fig. 1 is the overall structure of the setting tool of the present invention.

Fig. 2 is an enlarged view of fig. 1A according to the present invention.

Fig. 3 is an enlarged view of fig. 1B according to the present invention.

Fig. 4 is an enlarged view of fig. 3C according to the present invention.

Fig. 5 is a structure view of the closure of the present invention.

Fig. 6 is a three-dimensional cross-sectional structure diagram of the pull sleeve of the present invention.

Fig. 7 is an enlarged view of the fourth shear pin setting position of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.

Referring to the attached drawings 1-7, a multifunctional hydraulic setting tool for a pipe column comprises an upper joint 1, a connecting sleeve 3, an upper central tube 5, a lower central tube 17 and a guide shoe 20 which are sequentially connected in a hollow penetrating manner, wherein a ball seat device is arranged in the lower central tube 17, a setting device is sleeved on the outer walls of the upper central tube 5 and the lower central tube 17, a hydraulic mechanism used for setting the setting device is arranged on the connecting sleeve 3, the setting tool is integrally set in the pipe column, and the hydraulic mechanism acts on the setting device and can be used for setting the setting tool in the pipe column. The side wall of the guide shoe 20 is provided with an injection port 201 which is communicated with the lower central tube 17. When the hydraulic mechanism applies force to the seating device for setting, the ball seat device closes the hollow drift diameter in the lower center tube 17. After the setting tool is wholly set, cement paste sequentially passes through the hollow drift diameter communicated with the upper connector 1, the connecting sleeve 3, the upper central tube 5 and the lower central tube 17 through the retainer on the bottom surface, the ball seat device is opened through the pressure of the cement paste, the cement paste is squeezed into a gap between the setting tool and a tubular column annulus through the injection port 201 after the cement paste is communicated with the injection port 201, and the well section needing to be sealed or cracks and holes entering a stratum are sealed so as to achieve the purposes of plugging and leakage repairing.

In order to effectively prevent the reverse spitting of the cement paste which is not solidified in the squeezed and injected annular gap after the retainer is stopped and the problem that the plugging and the leakage repairing are not achieved, a reverse spitting prevention device for preventing the injection port 201 from reversely spitting towards the lower central tube 17 is arranged between the injection port 201 and the lower central tube 17, and the reverse spitting prevention device can effectively perform effective plugging on the injection port 201 before the cement paste which is squeezed and injected in the annular gap is not solidified after the retainer is stopped and the annular gap is stopped, so that the reverse spitting of the cement paste is prevented, and the plugging and the leakage repairing quality of the injected paste are improved.

Specifically, the hydraulic mechanism comprises a piston 4 which is hermetically sleeved on the outer wall of the connecting sleeve 3, a hydraulic hole 301 which is used for applying pressure to the piston 4 towards the setting device is formed in the side wall of the connecting sleeve 3, a first shear pin 2 which is connected with the piston 4 is arranged at the top end of the connecting sleeve 3, and a locking ring 6 which is used for limiting the stroke of the piston 4 is arranged at the bottom end of the connecting sleeve. During setting, the upper connector 1 is used for pressurizing the hollow drift diameter, hydraulic oil enters the hollow drift diameter through the hydraulic hole 301 and contacts the piston 4, after the shearing pulling force of the first shearing pin 2 is achieved, the piston 4 is used for shearing the first shearing pin 2, the piston 4 is pushed towards the setting device by the hydraulic oil, and the setting device is used for setting under the pressure of the piston 4. In order to ensure that the piston acts towards the setting device in a single direction during pressing, the outer wall of the connecting sleeve 3 and the outer wall of the piston 4 are preferably provided with an inclined surface limit matching structure (as shown in fig. 2D). Meanwhile, in order to improve the sealing performance between the piston 4 and the connecting sleeve 3, a sealing ring 23 is preferably arranged on the outer wall of the connecting sleeve 3, and the sealing ring 23 ensures that the piston 4 is always in a sealing state when the piston travels to the stroke limit position of the locking ring 6.

Specifically, the setting tool comprises a mandrel 11 sleeved on the outer walls of an upper central tube 5 and a lower central tube 17, an upper slip 7, an upper cone 9, a sealing rubber cylinder 12, a lower cone 13 and a lower slip 16 are sequentially sleeved on the outer wall of the mandrel 11, the upper slip 7 abuts against the end portion of a piston 4, the lower slip 16 abuts against the end portion of an slipper 20, the bottom end of the mandrel 11 is fixedly connected (preferably in threaded connection) with the slipper 20, the top end of the mandrel 11 is connected with a connecting tool used for setting and releasing the hands, and the setting tool further comprises a locking mechanism used for setting and locking. When the seat is sealed, firstly, the upper end and the lower end of the mandrel 11 are sequentially fixed with the outer wall of the upper central tube 5 and the inner wall of the port of the guide shoe 20, when the piston 4 is under hydraulic pressure, the upper slip 7, the upper centrum 9, the sealing rubber cylinder 12 and the lower centrum 13 are sequentially pushed downwards to move downwards along the surface of the mandrel 11 (the body of the mandrel is limited with the upper central tube 5 through a connecting tool), along with the gradual increase of the downward stroke, the distance between the piston 4 and the end part of the guide shoe 20 is gradually reduced, the upper slip 7 and the lower slip 16 sequentially extrude the sealing rubber cylinder 12 after the conical surfaces of the upper centrum 9 and the lower centrum 13 are broken, the sealing rubber cylinder 12 gradually expands, the outer diameter is. And after the setting, the setting state is locked and maintained through a locking mechanism.

Specifically, the locking mechanism is a pawl structure 101 which is arranged between the outer wall of the mandrel 11 and the upper vertebral body 9 and the rubber sealing cylinder 12 and used for locking the upper vertebral body 9 and the rubber sealing cylinder 12 in a one-way movement towards the direction of the guide shoe 20. After the setting is finished, the inverted tooth structure 101 locks the relative positions of the upper vertebral body 9 and the sealing rubber cylinder 12 with the mandrel 11, so as to avoid the problem of setting looseness caused by sliding. In order to improve the locking effect on the seated state, preferably, an inverted tooth locking ring 10 is provided between the inner wall of the upper cone 9 and the mandrel 11, and one end of the inverted tooth locking ring abuts against the end of the sealing rubber cylinder 12. The inverted tooth locking ring 10 locks the setting state of the sealing rubber cylinder 12 like the upper vertebral body 9, and improves the setting locking effect. In order to avoid the friction damage of the shoulder part and the pipe column when the sealing rubber cylinder 12 is expanded and set, a metal back ring 24 is arranged between the two sides of the shoulder part and the upper and lower centrum, so as to solve the friction abrasion of the shoulder part of the sealing rubber cylinder 12 and protect the setting firmness of the sealing rubber cylinder 12.

In order to prevent the problem that the setting tool cannot be accurately set at the designed depth after the setting tool is set by the upper slip 7 and the upper cone 9 which are extruded to the sealing rubber cylinder 12 through the self gravity action in the process of going down the well, a second shear pin 21 is arranged between the mandrel 11 and each of the upper cone 9 and the lower cone 13. When setting, the piston 4 pushes the upper slip 7 to shear the second shear pin 21, and pushes the sealing rubber cylinder 12 to expand and set. The second shear pin 21 can limit the position of the upper cone 9 and the upper slip 7, and prevent the problem of setting caused by self-pressing of the sealing rubber cylinder 12. Meanwhile, the second shear pin 21 can also prevent the problem that the sealing rubber cylinder 12 is accidentally set due to the fact that the piston 4 moves downwards to extrude the upper slip 7 and the upper vertebral body 9 after the first shear pin 2 is accidentally broken due to other reasons.

Specifically, the coupling tool is a pulling sleeve 8 which comprises an upper connecting part 81 connected with a forward thread (shown as a1 in fig. 6) on the outer wall of the upper central tube 5 and a lower connecting part 83 connected with a reverse thread (shown as b1 in fig. 6) on the inner wall of the mandrel 11, and a connecting part 82 with rated releasing fracture tension is arranged at the joint of the upper connecting part 81 and the lower connecting part 83. During setting, the pulling sleeve 8 is used for fixing the position of the mandrel 11 and the upper central tube 5 relatively, so that the piston 4 pushes the upper slip 7, the upper cone 9, the sealing rubber cylinder 12 and the lower cone 13 to move downwards along the surface of the mandrel 11 for setting. When the upper joint 1 drives the connecting sleeve 3, the piston 4 (which is lifted through the locking ring 6 on the connecting sleeve 3), the upper central tube 5 and the lower central tube 17 to lift up for releasing the hands, the upper connecting part 81 and the lower connecting part 83 are broken and separated at the connecting part 82 by the lifting force, so that the upper central tube 5 is separated from the core 11, and the components are lifted up to complete the releasing operation. When the connecting part 82 fails and cannot be broken by pulling, the upper central tube 5 can be rotated to drive the pull sleeve 8 to rotate integrally, and the pull sleeve 8, the upper central tube 5 and the mandrel 11 are in forward and reverse threaded connection in sequence, so that in the process that the upper central tube 5 drives the pull sleeve 8 to rotate positively and lock positively, the pull sleeve 8 and the mandrel 11 are separated in a reverse rotation mode, and the releasing operation is completed. The snapping and reverse rotation disengagement of the pull sleeve 8 provides a double insurance for the releasing of the above components.

As shown in fig. 7, preferably, the coupling means is a fourth shear pin 25 coupled between the mandrel 11 and the upper central tube 5 at a circumferential spacing. When the mandrel 11 is set, the body of the mandrel 11 and the upper central pipe 5 are limited through the fourth shear pin 25, when the piston 4 is under hydraulic pressure, the upper slip 7, the upper cone 9, the sealing rubber cylinder 12 and the lower cone 13 are sequentially pushed downwards to move downwards along the surface of the mandrel 11, and the setting mode is the same as the setting mode, so that the setting is realized. After the setting, the setting state is locked and maintained through the inverted tooth structure 101. When the releasing is finished, the fourth shear pin 25 is broken by lifting the upper joint 1 and the upper central pipe 5, and the releasing operation is finished.

Specifically, the anti-spitting device comprises a closing sleeve 19 which is installed on the outer wall of the bottom end of the lower central tube 17 in a matched mode, the closing sleeve 19 comprises an elastic claw 191 locked with the outer wall of the lower central tube 17 and a tube part 192 used for blocking the injection port 201, the outer wall of the lower central tube 17 is provided with a first groove 171 matched with the elastic claw 191, and the outer wall of the elastic claw 191 is in elastic sealing locking with the lower central tube 17 through contact with the inner wall of the mandrel 11. When cement slurry is squeezed into the annular space between the guide shoe 20 and the pipe string, the cement slurry flows out through the lower central pipe 17, then enters the injection port 201 through the gap between the elastic claws 191 (as shown in fig. 5E), and finally is squeezed into the annular space between the guide shoe 20 and the pipe string. When the injection port 201 needs to be plugged, the lower central tube 17 is matched with the elastic claw 191 to integrally lift the closing sleeve 19, so that the tube part 192 corresponds to and plugs the injection port 201, and the reverse discharge effect of cement paste through the injection port 201 is realized.

In order to quickly finish the lifting and releasing operation of the upper central tube, the lower central tube and the components after the cylinder part 192 blocks the injection port 201, the inner wall of the mandrel 11 is provided with a groove 110 for unlocking the elastic claw 191 of the closing sleeve 19 and the lower central tube 17, and under the condition that the elastic claw 191 is matched with the groove 110 to unlock, the outer wall of the cylinder part 192 corresponds to the injection port 201 and blocks the injection port 201. When the cylinder part 192 is lifted up along with the lower central tube 17 to block the injection port 201, the end of the elastic claw 191 is attached into the groove 110 under the action of the self elasticity force and is separated from the locking fit with the first groove 171, so that the whole closing sleeve 19 is separated from the lower central tube 17, and the lifting and releasing operation of the upper central tube, the lower central tube and the components can be realized (in fig. 5, the side a of the elastic claw 191 is matched with the groove 110, and the side b is matched with the first groove 171). The releasing mode is to complete the releasing operation quickly when the injection port 201 is just plugged and cement slurry is not solidified, so as to perform other operation in the well in the process of cement slurry solidification.

Specifically, the ball seat device comprises a ball seat 14 and a ball body 100 which are sleeved in a lower center tube 17, and a third shear pin 22 for limiting the ball seat 14 is arranged on the inner wall of the lower center tube 17. After setting is completed, cement slurry introduced into the upper central tube 5 acts on the ball body 100, and the third shear pin 22 is sheared through the ball seat 14, so that the ball body 100 falls into the bottom of the tube part 192, the lower central tube 17 is communicated with the injection port 201, and cement slurry squeezing operation is performed.

The principle of the utility model is that: the setting tool can realize the operations of setting locking, cement paste squeezing, plugging anti-reverse-spitting and lifting and releasing.

Setting and locking: after the setting tool is wholly lowered to a preset depth in a well, oil is pumped into the upper central tube 5 and the lower central tube 17, the ball body 100 blocks the drift diameter of the lower central tube 17, the oil enters from the hydraulic hole 301 to be in contact with the piston 4, after the shearing tensile force of the first shear pin 2 is reached, the piston 4 breaks the first shear pin 2, the piston 4 is moved towards the direction of the upper slip 7 by hydraulic oil, the upper cone 9, the sealing rubber cylinder 12 and the lower cone 13 are sequentially pushed to move downwards along the surface of the mandrel 11, along with the gradual increase of the downward stroke, the distance between the piston 4 and the end part of the guide shoe 20 is gradually reduced, the upper slip 7 and the lower slip 16 are sequentially broken along the conical surfaces of the upper cone 9 and the lower cone 13 to extrude the sealing rubber cylinder 12, and the sealing rubber cylinder 12 is gradually expanded and enlarged in outer diameter to realize setting. After the seat sealing, the upper cone 9, the inverted tooth locking ring 10 and the inverted tooth structure 101 matched with the surface of the mandrel 11 through the sealing rubber cylinder 12 lock the position in the seat sealing state, and the problem of looseness of the seat sealing caused by sliding is avoided.

Cement paste squeezing: after setting and locking, cement slurry is introduced into the upper central tube and the lower central tube, and after the pressure of the cement slurry is increased, the ball seat 14 cuts the third shear pin 22, so that the ball 100 falls into the bottom of the tube part 192, the lower central tube 17 is communicated with the injection opening 201, the cement slurry enters an annular space between the guide shoe 20 and a tubular column, and is squeezed into a well section to be sealed or enters cracks and holes of a stratum, and the purposes of plugging and leakage repairing are achieved.

Blocking and anti-regurgitation: after cement paste is squeezed, the connecting sleeve 3, the piston 4, the upper central tube 5 and the lower central tube 17 are sequentially lifted through the upper connector 1, the lower central tube 17 drives the elastic claw 191 and the tube part 192 to move upwards through the first groove 171, the tube part 192 gradually moves to a position corresponding to the injection port 201 and seals the injection port, and therefore the anti-spitting effect of the cement paste through the injection port 201 is achieved.

Lifting up and releasing: under the state that the plugging is prevented from being reversely discharged, the end parts of the elastic claws 191 are attached to the grooves 110 under the action of self elasticity and are separated from the locking fit with the first grooves 171, so that the whole closing sleeve 19 is separated from the lower central tube 17, the upper joint 1 is continuously lifted, the upper central tube 5 and the mandrel 11 (the mandrel 11 limits the guide shoe 20 through setting, so that the guide shoe 20 fixes the mandrel 11) break and separate the upper connecting part 81 and the lower connecting part 83 at the connecting part 82, the upper central tube 5 is separated from the mandrel 11, and the upper joint 1, the connecting sleeve 3, the piston 4, the upper central tube 5 and the lower central tube 17 are lifted to finish the releasing operation. When the connecting part 82 fails and cannot be broken by pulling, the upper central tube 5 can be rotated to drive the pull sleeve 8 to rotate integrally, and the pull sleeve 8, the upper central tube 5 and the mandrel 11 are in forward and reverse threaded connection in sequence, so that in the process that the upper central tube 5 drives the pull sleeve 8 to rotate positively and lock positively, the pull sleeve 8 and the mandrel 11 are separated in a reverse rotation mode, and the releasing operation is completed. The snapping and reverse rotation disengagement of the pull sleeve 8 provides a double insurance for the releasing of the above components. The fourth shear pin 25 can also replace the pull sleeve 8 to complete the setting and releasing operation.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A multi-functional hydraulic pressure of tubular column seals instrument sits, including upper joint (1), adapter sleeve (3), last center tube (5), lower center tube (17) and guide shoe (20) that cavity link up in proper order, wherein, be equipped with the ball seat device down in center tube (17) go up center tube (5) and center tube (17) outer wall cover and be equipped with and sit the sealing device down, it is right to be equipped with on adapter sleeve (3) and be used for sitting the sealing device sit the hydraulic pressure mechanism that seals the instrument is whole, injection opening (201) that link up with lower center tube (17) are seted up to guide shoe (20) lateral wall be equipped with between injection opening (201) and lower center tube (17) and prevent that injection opening (201) are towards the anti-regurgitation device in center tube (17) down.

2. The one-trip pipe string multifunctional hydraulic setting tool of claim 1, wherein: the hydraulic mechanism comprises a piston (4) which is hermetically sleeved on the outer wall of the connecting sleeve (3), a hydraulic hole (301) which is used for applying pressure to the piston (4) towards the setting device is formed in the side wall of the connecting sleeve (3), a first shear pin (2) which is connected with the piston (4) is arranged at the top end of the connecting sleeve (3), and a locking ring (6) which is used for limiting the stroke of the piston (4) is arranged at the bottom end of the connecting sleeve.

3. The one-trip pipe string multifunctional hydraulic setting tool of claim 2, wherein: the setting tool comprises a mandrel (11) sleeved on the outer wall of an upper central tube (5) and a lower central tube (17), wherein an upper slip (7), an upper cone (9), a sealing rubber cylinder (12), a lower cone (13) and a lower slip (16) are sequentially sleeved on the outer wall of the mandrel (11), the upper slip (7) abuts against the end part of a piston (4), the lower slip (16) abuts against the end part of a guide shoe (20), the bottom end of the mandrel (11) is tightly connected with the guide shoe (20), the top end of the mandrel (11) and a connecting tool for setting and releasing is arranged between the outer walls of the upper central tube (5), and the setting tool further comprises a locking mechanism for setting and locking.

4. The one-trip pipe string multifunctional hydraulic setting tool of claim 3, wherein: the locking mechanism is a pawl structure (101) which is arranged between the outer wall of the mandrel (11) and the upper vertebral body (9) and the sealing rubber cylinder (12) and used for locking the upper vertebral body (9) and the sealing rubber cylinder (12) in a one-way moving mode towards the direction of the guide shoe (20), and second shear pins (21) are arranged between the upper vertebral body (9) and the mandrel (11) and between the lower vertebral body (13) and the mandrel (11).

5. The one-trip pipe string multifunctional hydraulic setting tool of claim 4, wherein: the coupling tool is a pulling sleeve (8) and comprises an upper connecting part (81) in positive-rotation threaded connection with the outer wall of the upper central tube (5) and a lower connecting part (83) in reverse-rotation threaded connection with the inner wall of the mandrel (11), and a connecting part (82) with rated releasing fracture tension is arranged at the connection position of the upper connecting part (81) and the lower connecting part (83).

6. The one-trip pipe string multifunctional hydraulic setting tool of claim 4, wherein: the coupling means is a fourth shear pin (25) coupled between the mandrel (11) and the upper central tube (5) at a circumferential spacing.

7. A string of pipe multi-functional hydraulic setting tool according to any of claims 5-6, characterized in that: the anti-reverse-spitting device comprises a closing sleeve (19) which is installed on the outer wall of the bottom end of a lower central tube (17) in a matched mode, the closing sleeve (19) comprises an elastic claw (191) locked with the outer wall of the lower central tube (17) and a tube portion (192) used for plugging the injection port (201), and the outer wall of the elastic claw (191) is in elastic sealing locking with the lower central tube (17) through contact with the inner wall of the mandrel (11).

8. The one-trip pipe string multifunctional hydraulic setting tool of claim 7, wherein: the inner wall of the mandrel (11) is provided with a groove (110) for unlocking an elastic claw (191) of the closing sleeve (19) from the lower central tube (17), and the outer wall of the tube part (192) of the mandrel corresponds to the injection port (201) and seals the injection port (201) under the condition that the elastic claw (191) is matched with the groove (110) to unlock.

9. The one-trip pipe string multifunctional hydraulic setting tool of claim 8, wherein: the ball seat device comprises a ball seat (14) and a ball body (100) which are sleeved in a lower central tube (17), wherein a third shear pin (22) used for limiting the ball seat (14) is arranged on the inner wall of the lower central tube (17).

Images