CN220415318U - Shaft hydraulic temporary packing device - Google Patents

Abstract

The utility model discloses a shaft hydraulic temporary packing device, which solves the technical problems that a setting pipe column needs to be rotated in the process of tripping a well sealing pipe column and the operation cost is high. The device comprises a packer, a switch ball valve, a central pipe, a connecting ring and a plurality of thread connecting pieces, wherein the central pipe is provided with the connecting ring; the support ring is sleeved on the central pipe in a sliding way and supports the plurality of threaded connection pieces so that the bottom ends of the plurality of threaded connection pieces expand outwards and can be in threaded connection with the threaded parts on the inner wall of the packer; the hand-off mechanism is arranged on the central tube and used for controlling the supporting ring to slide downwards and separate from the threaded connection pieces so as to enable the bottom ends of the threaded connection pieces to shrink inwards and enable the threaded connection pieces to separate from the threaded parts on the inner wall of the packer, so that the hand-off operation is realized. According to the utility model, the well sealing pipe column can be released by hydraulic mode, the setting pipe column does not need to be rotated, the operation is simple and convenient, the construction is safe and reliable, and the operation cost is reduced.

Description

Shaft hydraulic temporary packing device

Technical Field

The utility model belongs to the technical field of wellbore packing, and particularly relates to a wellbore hydraulic temporary packing device.

Background

At present, when a wellhead is replaced or a wellhead is re-manufactured, a well bore is required to be sealed before construction in order to ensure well control safety in the construction process. The well bore is sealed by mechanical sealing tool, and RTTS packer and storm valve structure are commonly used. RTTS (real time transport) packers are set by adding more than 12T of gravity under the packer to ensure the setting of the RTTS packer, and currently, a drill rod is generally used for weighting.

However, the storm valve needs to rotate the pipe column, that is, the drill rod needs to be adopted to carry out the running-in and rotation operation of the setting pipe column, so that the problem that the pipe column rotates to cause larger errors, and the pipe column cannot be successfully taken off is avoided. Therefore, not only is the workover rig on the operation site required to have the rotation capability suitable for RTTS setting required, but also ordinary workover operation is required to also mobilize the drilling tool to be out of the sea, so that the operation cost is increased, and the improvement is required.

Disclosure of Invention

In order to solve all or part of the problems, the utility model aims to provide a shaft hydraulic temporary packing device, which adopts a hydraulic mode to carry out the operation of tripping a well sealing pipe column without rotating a setting pipe column, has simple and convenient operation, safe and reliable construction and reduces the operation cost.

The utility model provides a shaft hydraulic temporary packing device, which comprises a packer, a switch ball valve connected to the bottom of the packer, and further comprises:

the central pipe is movably inserted into the packer;

the bearing ring is fixedly sleeved on the central tube;

the threaded connection pieces are respectively made of elastic materials, are respectively fixed at the bottom of the bearing ring and are uniformly distributed along the circumferential direction of the bearing ring;

the support ring is sleeved on the central pipe in a sliding manner, is positioned on the inner sides of the threaded connection pieces, supports the threaded connection pieces, enables the bottom ends of the threaded connection pieces to expand outwards, and can be in threaded connection with the threaded parts on the inner wall of the packer;

the hand-off mechanism is arranged on the central pipe and used for controlling the supporting ring to slide downwards and separate from the threaded connection pieces so as to enable the bottom ends of the threaded connection pieces to shrink inwards and enable the threaded connection pieces to separate from the threaded parts on the inner wall of the packer so as to realize hand-off operation;

the switch mechanism is arranged at the bottom of the central tube and is used for controlling the switch ball valve to be opened and closed.

Optionally, the hand-off mechanism includes:

the hand-off piston is sleeved on the central tube through a sliding sleeve and is positioned above the supporting ring;

the hand-off pin is arranged on the central tube, is positioned below the hand-off piston and is used for blocking the downward movement of the hand-off piston;

the hand-off hole is formed in the central tube and is positioned between the bearing ring and the hand-off piston;

the supporting ball seat is fixed in the central tube;

the plugging ball can be put into the central pipe from the top port of the central pipe and plugs the upper port of the supporting ball seat;

when the plugging ball plugs the upper port of the supporting ball seat, the oil pipe is used for pressing the central pipe, the hand-off piston moves downwards under the action of pressure and shears the hand-off pin, so that the hand-off piston pushes the supporting ring to move downwards, and the supporting ring is separated from the threaded connecting sheet.

Optionally, a seat sleeve is sleeved at the upper end of the central tube in a sliding way, and when the threaded connection piece is in threaded connection with the threaded part on the inner wall of the packer, the seat sleeve is abutted with the top end of the packer;

the central pipe is provided with a control mechanism which is used for controlling the setting sleeve to move downwards and pushing the packer to move downwards so that slips on the packer and grooves on a shaft form clamping fit to realize setting of the packer.

Optionally, the control mechanism includes:

the bearing seat is fixed at the top end of the central tube;

the setting piston is sleeved on the central tube in a sliding manner, is positioned on the inner side of the bearing seat, and forms a setting ring cavity with the bearing seat;

the force transmission sleeve is fixed at the bottom end of the setting piston;

the setting pin is arranged on the central tube, is positioned below the force transmission sleeve and is used for blocking the force transmission sleeve from moving downwards;

the seat hole is arranged on the central tube and is communicated with the seat ring cavity;

when the plugging ball plugs the upper port of the supporting ball seat, the oil pipe is used for pressing the central pipe, the setting piston drives the force transmission sleeve to move downwards under the action of pressure, and the force transmission sleeve is enabled to shear the setting pin, so that the force transmission sleeve pushes the setting sleeve to drive the packer to move downwards, and setting of the packer and a shaft is achieved.

Optionally, the fixed cover in the center tube is equipped with the setting ring, the setting ring is located the below of setting sleeve, the top port department of packer is provided with the setting groove, when the screwed connection piece with the threaded part on the packer inner wall forms threaded connection, the setting ring card is gone into in the setting groove.

Optionally, the switch ball valve includes:

the sealing cylinder is in threaded connection with the bottom end of the packer;

the sealing ball seat is fixed in the sealing cylinder;

the sealing ball is movably arranged in the sealing cylinder, and is positioned below the sealing ball seat;

the elastic component is arranged in the sealing cylinder;

the elastic component is used for pushing the sealing ball to move upwards and sealing the lower port of the sealing ball seat, and the switch mechanism is used for controlling the sealing ball to move downwards.

Optionally, the resilient member comprises:

the spring seat is fixed in the sealing cylinder and positioned below the sealing ball;

the support spring is arranged between the sealing ball and the spring seat, one end of the support spring is connected with the sealing ball, the other end of the support spring is fixedly connected with the spring seat, and the support spring is used for pushing the sealing ball to move upwards.

Optionally, the switching mechanism includes:

the receiving barrel is fixed at the bottom end of the central pipe;

the switch guide shoe is fixed at the bottom end of the receiving cylinder;

when the threaded connection piece and the threaded part on the inner wall of the packer form threaded connection, the switch guide shoe penetrates through the sealing ball seat and pushes the sealing ball to move downwards.

According to the technical scheme, the shaft hydraulic temporary packing device provided by the utility model has the following advantages:

the device can adopt the hydraulic pressure mode to seal the setting of well tubular column, take off the hand operation, need not to rotate and seal the tubular column to can adopt oil pipe commonly used as the tubular column of going into, it is more simple and convenient to operate, construction safe and reliable can also reduce operation cost simultaneously.

Additional features and advantages of the utility model will be set forth in the description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and do not limit the utility model.

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of area A of FIG. 1;

FIG. 3 is an enlarged schematic view of region B of FIG. 1;

FIG. 4 is an enlarged schematic view of region C of FIG. 1;

fig. 5 is an enlarged schematic view of the region D in fig. 1.

Reference numerals illustrate:

1. a packer; 2. switching a ball valve; 21. a sealing cylinder; 22. sealing the ball seat; 23. a sealing ball; 24. an elastic component; 241. a spring seat; 242. a support spring; 3. a central tube; 4. a receiving ring; 5. a threaded connection piece; 6. a support ring; 7. a hand-off mechanism; 71. a hand-off piston; 72. removing the pin; 73. a hand-removing hole; 74. supporting the ball seat; 75. a blocking ball; 8. a seat cover; 9. a control mechanism; 91. a socket; 92. setting a piston; 93. a setting ring cavity; 94. sealing holes; 95. a force transmission sleeve; 96. setting pins; 10. a setting ring; 11. a setting groove; 12. a switching mechanism; 121. a receiving cylinder; 122. switch guide shoes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be arbitrarily combined with each other.

Fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5 show an embodiment of the utility model, and in this embodiment, a wellbore hydraulic temporary packing device is disclosed, which comprises a packer 1, the bottom end of the packer 1 is connected with a switch ball valve 2, a central pipe 3 is movably inserted in the packer 1, a receiving ring 4 is fixedly sleeved on the central pipe 3, the bottom of the receiving ring 4 is fixedly connected with a plurality of elastic threaded connection pieces 5, and the plurality of threaded connection pieces 5 are respectively arc-shaped and are uniformly distributed along the circumferential direction of the receiving ring 4.

In one embodiment, as shown in fig. 1 and 2, the central tube 3 is slidably sleeved with a supporting ring 6, and the supporting ring 6 is located inside the plurality of threaded connection pieces 5 and supports the plurality of threaded connection pieces 5, so that the bottom ends of the plurality of threaded connection pieces 5 expand outwards and can form threaded connection with the threaded portions on the inner wall of the packer 1. That is, the plurality of screw connection pieces 5 are expanded into a ring-shaped structure under the action of the supporting ring 6, so that the plurality of screw connection pieces 5 can form a ring-shaped screw structure matched with the screw thread part on the inner wall of the packer 1, thereby realizing the connection capability of the packer 1 and the central tube 3.

In one embodiment, as shown in fig. 2 and 3, the central tube 3 is provided with a hand-off mechanism 7, and the hand-off mechanism 7 is used for controlling the support ring 6 to slide downwards and separate the support ring 6 from the threaded connection sheet 5. At this time, the bottom ends of the plurality of screw connection pieces 5 are contracted inward, and the screw connection pieces 5 are separated from the screw thread portions on the inner wall of the packer 1, thereby realizing the unhooking operation.

In one embodiment, as shown in fig. 2 and 3, the hand-off mechanism 7 includes a hand-off piston 71 sleeved on the central tube 3 by a sliding sleeve, and the hand-off piston 71 is located above the support ring 6. The central tube 3 is fixedly connected with a hand-off pin 72 positioned below the hand-off piston 71, and the hand-off pin 72 is used for blocking the downward movement of the hand-off piston 71. Meanwhile, the central tube 3 is provided with a hand-off hole 73, and the hand-off hole 73 is positioned between the receiving ring 4 and the hand-off piston 71.

In one embodiment, as shown in fig. 2 and 3, the hand-off mechanism 7 further includes a support ball seat 74 and a plugging ball 75, the support ball seat 74 is fixed to the inner wall of the central tube 3, and the plugging ball 75 can be put into the top port of the central tube 3 and plug the upper port of the support ball seat 74.

When the blocking ball 75 blocks the upper port of the supporting ball seat 74, a liquid medium is injected into the center tube 3 through the oil pipe, that is, is pressed toward the center tube 3, and at this time, the liquid medium enters between the receiving ring 4 and the hand-off piston 71 through the hand-off hole 73. Subsequently, the release piston 71 moves downwards under the action of pressure and shears the release pin 72, and as the release piston 71 continues to move, the release piston 71 can push the support ring 6 to move downwards and separate the support ring 6 from the threaded connection sheet 5, so that the release operation of the well string is realized.

The wellbore hydraulic temporary packing device in the embodiment can carry out the operation of tripping the well string in a hydraulic mode, does not need to rotate the setting string, can adopt the common oil pipe as a running string, is simpler and more convenient to operate, is safe and reliable in construction, and can also reduce the operation cost.

In one embodiment, as shown in fig. 1 and 4, the upper end of the central tube 3 is slidably sleeved with a seat cover 8, and when the threaded connection piece 5 is in threaded connection with the threaded portion on the inner wall of the packer 1, the seat cover 8 abuts against the top end of the packer 1.

In one embodiment, as shown in fig. 1 and 4, a control mechanism 9 is arranged on the central tube 3, and the control mechanism 9 is used for controlling the setting sleeve 8 to move downwards and pushing the packer 1 to move downwards so as to enable slips on the packer 1 to form clamping fit with grooves on a shaft, so that setting of the packer 1 is achieved.

In one embodiment, as shown in fig. 1 and 4, the control mechanism 9 includes a receiving seat 91 fixed on the top end of the central tube 3, a setting piston 92 is slidably sleeved on the central tube 3, the setting piston 92 is located on the inner side of the receiving seat 91, a setting ring cavity 93 is formed between the setting piston 92 and the receiving seat 91, and meanwhile, a setting hole 94 communicated with the setting ring cavity 93 is formed on the central tube 3.

In one embodiment, as shown in fig. 1 and 4, a force transmission sleeve 95 is fixedly connected to the bottom end of the setting piston 92, a setting pin 96 is fixedly connected to the central tube 3, and the setting pin 96 is located below the force transmission sleeve 95 and is used for blocking downward movement of the force transmission sleeve 95.

When the plugging ball 75 plugs the upper port of the support ball seat 74, it is pressed toward the center tube 3 through the oil pipe, and the liquid medium enters the setting ring cavity 93 through the setting hole 94. At this point, the setting piston 92 under pressure drives the force transfer sleeve 95 downward and causes the force transfer sleeve 95 to shear the setting pin 96. With the continued movement of the setting piston 92, the force transmission sleeve 95 can push the setting sleeve 8 to drive the packer 1 to move downwards, so that the setting of the packer 1 and the shaft is realized.

In one embodiment, as shown in fig. 1 and 4, a setting ring 10 is fixedly sleeved on the central tube 3, the setting ring 10 is positioned below the setting sleeve 8, and a setting groove 11 is arranged at the top port of the packer 1. When the thread connection piece 5 and the thread part on the inner wall of the packer 1 form a thread connection, the setting ring 10 is clamped into the setting groove 11 to realize the pre-setting of the packer 1.

In one embodiment, as shown in fig. 1 and 5, the switch ball valve 2 comprises a sealing cylinder 21 connected to the bottom end of the packer 1 in a threaded manner, a sealing ball seat 22 is fixedly connected in the sealing cylinder 21, a sealing ball 23 is movably arranged in the sealing cylinder 21, and the sealing ball 23 is located below the sealing ball seat 22. A resilient member 24 is disposed within the sealing barrel 21 and the resilient member 24 is used to urge the closure ball 23 upwardly and to seal off the lower port of the sealing ball seat 22. Meanwhile, a switching mechanism 12 is provided at the bottom end of the center tube 3, and the switching mechanism 12 is used to control the closing ball 23 to move downward.

In one embodiment, as shown in FIGS. 1 and 5, the resilient member 24 includes a spring seat 241 fixedly attached within the seal cartridge 21, with the spring seat 241 being located below the closure ball 23. A supporting spring 242 is arranged between the sealing ball 23 and the spring seat 241, one end of the supporting spring 242 is connected with the sealing ball 23, the other end of the supporting spring 242 is fixedly connected with the spring seat 241, and the supporting spring 242 is used for pushing the sealing ball 23 to move upwards.

In one embodiment, as shown in fig. 1 and 5, the switch mechanism 12 includes a receiving cylinder 121 fixed to the bottom end of the central tube 3, and a switch shoe 122 is fixedly connected to the bottom end of the receiving cylinder 121. When the screw connection piece 5 is screwed with the screw part on the inner wall of the packer 1, the switch shoe 122 passes through the sealing ball seat 22 and pushes the closing ball 23 downward, so that the switch ball valve 2 is opened. When the support ring 6 is separated from the threaded connection sheet 5, that is, after the well sealing pipe column is out of hand, the lifting pipe drives the central pipe 3, the bearing barrel 121, the switch guide shoe 122 and other parts to move upwards, and the support spring 242 pushes the sealing ball 23 to move upwards and seal the lower port of the sealing ball seat 22, so that the switch ball valve 2 can be closed.

The wellbore hydraulic temporary packing device in the embodiment is used as follows:

the central tube 3 and other parts are inserted into the packer 1, at this time, the support ring 6 supports the bottom end of the thread connecting piece 5, and then the central tube 3 is rotated so that the thread connecting piece 5 is in threaded connection with the thread part on the inner wall of the packer 1. At this time, the setting ring 10 is clamped into the setting groove 11, the setting sleeve 8 is abutted against the top end of the packer 1, and the switch guide shoe 122 pushes the sealing ball 23 to move downwards, so that the switch ball valve 2 is opened.

Then, the central tube 3 drives the packer 1 and other parts to be lowered into the preset position of the shaft, and the plugging ball 75 is lowered along the top port of the central tube 3, so that the plugging ball 75 plugs the upper port of the supporting ball seat 74. At this point, a liquid medium is injected into the center tube 3 through the oil pipe, that is, the center tube 3 is pressurized, and at this time, the setting piston 92 pushes the force transmission sleeve 95 downward under the action of pressure, and causes the force transmission sleeve 95 to shear the setting pin 96. With the continuous movement of the setting piston 92, the force transmission sleeve 95 pushes the setting sleeve 8 to drive the packer 1 to move downwards, when the slips on the packer 1 are in clamping fit with the grooves in the shaft, the setting of the packer 1 and the shaft can be realized, and meanwhile, the rubber sleeve on the packer 1 is in abutting sealing with the inner wall of the shaft.

As the tubing continues to press against the base pipe 3, i.e. the pressure in the base pipe 3 increases gradually, the hands-free piston 71 moves downwards under the action of the pressure and shears the hands-free pins 72. With the continued movement of the release piston 71, the release piston 71 can push the support ring 6 to move downwards and separate the support ring 6 from the threaded connection sheet 5, thereby realizing the release operation of the well string. Subsequently, the lifting oil pipe drives the central pipe 3, the bearing barrel 121, the switch guide shoe 122 and other parts to move upwards, the supporting spring 242 pushes the sealing ball 23 to move upwards and seal the lower port of the sealing ball seat 22, so that the switching ball valve 2 is closed, and the packer 1 is fully set.

According to the process, the device can be used for carrying out the operation of tripping the well sealing pipe column in a hydraulic mode, the setting pipe column does not need to be rotated, the common oil pipe can be used as a running pipe column, the operation is simpler and more convenient, the construction is safe and reliable, and meanwhile, the operation cost can be reduced.

Moreover, the design makes the whole well sealing pipe column shorter, and the setting and the unhooking operation of the well sealing pipe column can be realized by adopting an oil pipe or a drill rod without a counterweight. In normal construction, the well can be sealed and unhooked through oil pipe pressing, the pipe column is not required to be rotated, the well repairing device is convenient and quick to use, the requirement on well repairing equipment is low, the performance is reliable, the pipe column counterweight is not required, the operation cost is saved, the operation program is greatly simplified, and the operation time is saved.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (8)

1. The utility model provides a wellbore hydraulic pressure temporary packing device, includes packer (1) and connect in switch ball valve (2) of packer (1) bottom, its characterized in that still includes:

the central pipe (3) is movably inserted into the packer (1);

the bearing ring (4) is fixedly sleeved on the central tube (3);

the threaded connection pieces (5) are multiple in number and are respectively arc-shaped, the threaded connection pieces (5) are made of elastic materials, and the multiple threaded connection pieces (5) are respectively fixed at the bottom of the bearing ring (4) and are uniformly distributed along the circumferential direction of the bearing ring (4);

the support ring (6) is sleeved on the central pipe (3) in a sliding manner, the support ring (6) is positioned on the inner sides of the threaded connection pieces (5) and supports the threaded connection pieces (5) so that the bottom ends of the threaded connection pieces (5) are outwards expanded and can be in threaded connection with the threaded parts on the inner wall of the packer (1);

the hand-off mechanism (7) is arranged on the central pipe (3), and the hand-off mechanism (7) is used for controlling the supporting ring (6) to slide downwards and separate from the threaded connection pieces (5) so as to enable the bottom ends of the threaded connection pieces (5) to shrink inwards and enable the threaded connection pieces (5) to separate from the threaded parts on the inner wall of the packer (1) to realize hand-off operation;

the switch mechanism (12) is arranged at the bottom of the central tube (3), and the switch mechanism (12) is used for controlling the switch ball valve (2) to be opened and closed.

2. The wellbore hydraulic temporary packer device according to claim 1, wherein the hands-off mechanism (7) comprises:

the hand-off piston (71) is sleeved on the central tube (3) in a sliding sleeve manner and is positioned above the supporting ring (6);

the hand-off pin (72) is arranged on the central tube (3), and the hand-off pin (72) is positioned below the hand-off piston (71) and used for blocking the downward movement of the hand-off piston (71);

a hand-off hole (73) which is arranged on the central tube (3), wherein the hand-off hole (73) is positioned between the bearing ring (4) and the hand-off piston (71);

a support ball seat (74) fixed in the central tube (3);

a plugging ball (75) capable of being thrown in from the top port of the central tube (3) and plugging the upper port of the supporting ball seat (74);

when the blocking ball (75) blocks the upper port of the supporting ball seat (74), the oil pipe is used for pressing the supporting ball seat to the central pipe (3), the hand-off piston (71) moves downwards under the action of pressure and shears the hand-off pin (72), so that the hand-off piston (71) pushes the supporting ring (6) to move downwards, and the supporting ring (6) is separated from the threaded connection sheet (5).

3. The wellbore hydraulic temporary packer device according to claim 2, characterized in that the upper end of the central tube (3) is slidably sleeved with a seat cover (8), the seat cover (8) being in abutment with the top end of the packer (1) when the threaded connection piece (5) is in threaded connection with the threaded portion on the inner wall of the packer (1);

the well packer is characterized in that a control mechanism (9) is arranged on the central tube (3), the control mechanism (9) is used for controlling the setting sleeve (8) to move downwards and pushing the packer (1) to move downwards, so that slips on the packer (1) are in clamping fit with grooves on a shaft, and setting of the packer (1) is achieved.

4. A wellbore hydraulic temporary packer according to claim 3, characterized in that the management mechanism (9) comprises:

a socket (91) fixed to the top end of the central tube (3);

the setting piston (92) is sleeved on the central tube (3) in a sliding manner, the setting piston (92) is positioned on the inner side of the bearing seat (91), and a setting ring cavity (93) is formed between the setting piston (92) and the bearing seat (91);

the force transmission sleeve (95) is fixed at the bottom end of the setting piston (92);

the setting pin (96) is arranged on the central tube (3), and the setting pin (96) is positioned below the force transmission sleeve (95) and used for blocking the force transmission sleeve (95) from moving downwards;

the seat hole (94) is arranged on the central tube (3) and is communicated with the seat ring cavity (93);

when the plugging ball (75) plugs the upper port of the supporting ball seat (74), the oil pipe is used for pressing the central pipe (3), the setting piston (92) drives the force transmission sleeve (95) to move downwards under the action of pressure, and the force transmission sleeve (95) is enabled to shear the setting pin (96), so that the force transmission sleeve (95) pushes the setting sleeve (8) to drive the packer (1) to move downwards, and setting of the packer (1) and a shaft is achieved.

5. A wellbore hydraulic temporary packer device according to claim 3, characterized in that a setting ring (10) is fixedly sleeved on the central tube (3), the setting ring (10) is located below the setting sleeve (8), a setting groove (11) is formed at the top port of the packer (1), and when the threaded connection piece (5) is in threaded connection with a threaded portion on the inner wall of the packer (1), the setting ring (10) is clamped into the setting groove (11).

6. The wellbore hydraulic temporary packer device according to claim 1, wherein the switching ball valve (2) comprises:

a sealing cylinder (21) which is connected with the bottom end of the packer (1) in a threaded manner;

a sealing ball seat (22) fixed in the sealing cylinder (21);

the sealing ball (23) is movably arranged in the sealing cylinder (21), and the sealing ball (23) is positioned below the sealing ball seat (22);

an elastic component (24) arranged in the sealing cylinder (21);

the elastic component (24) is used for pushing the sealing ball (23) to move upwards and sealing the lower port of the sealing ball seat (22), and the switching mechanism (12) is used for controlling the sealing ball (23) to move downwards.

7. The wellbore hydraulic temporary packer apparatus of claim 6, wherein the resilient member (24) comprises:

a spring seat (241) fixed in the seal cylinder (21) and positioned below the sealing ball (23);

the support spring (242) is arranged between the sealing ball (23) and the spring seat (241), one end of the support spring (242) is connected with the sealing ball (23), the other end of the support spring is fixedly connected with the spring seat (241), and the support spring (242) is used for pushing the sealing ball (23) to move upwards.

8. The wellbore hydraulic temporary packer apparatus of claim 6, wherein the switching mechanism (12) comprises:

a receiving cylinder (121) fixed at the bottom end of the central tube (3);

a switch guide shoe (122) fixed at the bottom end of the receiving cylinder (121);

when the thread connection piece (5) is in threaded connection with the thread part on the inner wall of the packer (1), the switch guide shoe (122) penetrates through the sealing ball seat (22) and pushes the sealing ball (23) to move downwards.