CN110644943A - Packers and Strings - Google Patents

Abstract

The invention provides a packer and a pipe string, and relates to the technical field of packers. The packer includes a base pipe; a sealing member and a thrust member are slidably sleeved outside the base pipe; The threaded part is an external thread, the inner wall of the thrust piece is provided with an internal thread adapted to the external thread, the outer wall of the thrust piece is provided with a friction part abutting against the inner wall of the wellbore; the outer wall of the base pipe is provided with a limit part, and one end of the seal is connected to the limit part abutting, and the other end is in contact with the thrust piece. The tubing string includes packers. The technical effect of convenient operation of the seat seal is achieved.

Description

Packers and Strings

technical field

The present invention relates to the technical field of packers, in particular, to a packer and a pipe string.

Background technique

When injecting steam in thermal recovery wells in oilfields, the injected steam is required to have high pressure and temperature to reduce the heat loss when the steam reaches the formation from the wellhead. In order to achieve the purpose of reducing heat loss, a thermal recovery packer with high temperature and high pressure resistance is generally installed on the steam injection string above the injection formation, so that the steam will not flow into the wellbore and avoid heat loss.

There are many types of thermal recovery packers. For example, the heat-sensitive sheet on the packer is used to deform the packer after being heated above 300 degrees Celsius, so that the high temperature resistant rubber tube on the packer expands to the inner wall of the wellbore. The wellbore is divided up, but this operation is very time consuming.

Therefore, providing an easy-to-operate packer and a pipe string has become an important technical problem to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a packer and a pipe string to alleviate the technical problem of inconvenient operation in the prior art.

In a first aspect, an embodiment of the present invention provides a packer, including a base pipe;

A sealing member and a thrust member are slidably sleeved outside the base pipe;

The outer wall of the base pipe is provided with a threaded portion, the threaded portion is an external thread, the inner wall of the thrust piece is provided with an internal thread adapted to the external thread, and the outer wall of the thrust piece is provided with a frictional contact with the inner wall of the wellbore department;

A limiting portion is provided on the outer wall of the base pipe, one end of the sealing member is in contact with the limiting portion, and the other end is abutted with the thrust member.

In conjunction with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the base pipe includes a central pipe and a sleeve sealingly sleeved outside the central pipe;

The sleeve is connected with the central pipe through a first connecting piece, and after the first connecting piece is cut off, the sleeve can slide relative to the central pipe;

Both the sealing member and the thrust member are sleeved on the sleeve, and the threaded portion is disposed outside the sleeve.

In conjunction with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the thrust member includes a connecting portion and a thrust portion;

The inner thread is opened on the inner wall of the connecting portion, one end of the thrust portion is connected with the connecting portion, and the other end is in contact with the sealing member.

In conjunction with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the thrust member further includes a slip and a slip seat;

The slips are arranged in the slip seat through a slip spring, and a first through hole is opened on the slip seat;

The slips are located between the connecting portion and the thrust portion, and under the pushing of the connecting portion and the thrust portion, the slips can protrude from the first through hole.

In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the connecting portion and the end of the thrust portion facing the slip are both provided with a wedge-shaped wedge for pushing the slip. tower.

In conjunction with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the slip seat is connected to the connecting portion through a second connecting member that can transmit torque, and the friction portion is provided on the The slip seat.

In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a threaded member is provided on the sleeve, the threaded member forms the threaded portion, and the sleeve is provided with a threaded member. an installation hole, wherein a stopper for connecting with the threaded member is arranged in the installation hole, so that the threaded member cannot move along the axis of the base pipe;

The stopper is provided with a first limit block for transmitting torque, and the first limit block can abut with the threaded member;

Or, the screw member is provided with a second limit block for transmitting torque, and the second limit block can abut with the stopper.

In conjunction with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an unencapsulated sleeve is sleeved at the bottom inside the sleeve, and the unencapsulated sleeve is connected to the sleeve through a third connecting piece connect;

The mounting hole is a second through hole, the top of the unpacking sleeve can block the second through hole, and the outer wall of the unpacking sleeve is provided with a groove capable of accommodating the stopper;

After the third connecting piece is cut off, the groove can correspond to the second through hole, and the threaded member can push the stopper into the groove, so that the threaded member can be pushed into the groove. capable of sliding relative to the stop along the base pipe axis;

The outer wall of the central tube is provided with a limiting member capable of abutting with the unsealing sleeve, and the limiting member is located below the unsealing sleeve.

In combination with the first aspect, the embodiment of the present invention provides a possible implementation of the first aspect, wherein the above-mentioned stopper is provided with an inclined surface, and the threaded member can abut against the inclined surface.

In a second aspect, an embodiment of the present invention provides a pipe string including the packer.

Beneficial effects:

A packer provided by the invention comprises a base pipe; a seal and a thrust piece are slidably sleeved on the outside of the base pipe; the outer wall of the base pipe is provided with a threaded part, the threaded part is an external thread, and the inner wall of the thrust piece is provided with a threaded part with an external thread. The outer wall of the thrust piece is provided with a friction part abutting against the inner wall of the wellbore; the outer wall of the base pipe is provided with a limiting part, one end of the sealing piece is in contact with the limiting part, and the other end is in contact with the thrust piece.

When in use, the staff rotates the base pipe, and the threaded portion arranged outside the base pipe can drive the thrust piece that fits with the threaded portion to generate a tendency to rotate. The rotation trend of the thrust member is converted into an upward trend, so that the thrust member can push the extruded seal, so that the seal completes the sealing between the base pipe and the inner wall of the wellbore.

A pipe string provided by the present invention includes a packer. Compared with the prior art, the pipe string has the above advantages, which will not be repeated here.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is a half-section schematic diagram of a packer provided by an embodiment of the present invention;

Fig. 2 is the partial enlarged view of A place in Fig. 1;

3 is a cross-sectional view of a casing in a packer provided by an embodiment of the present invention;

4 is a schematic diagram of the connection of a casing, a thrust member and a sealing member in a packer according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of opening a mounting hole on a casing in a packer according to an embodiment of the present invention;

6 is a schematic structural diagram of a threaded portion and a stopper installed in an installation hole on a casing in a packer according to an embodiment of the present invention;

7 is a schematic structural diagram of a threaded portion in a packer according to an embodiment of the present invention;

8 is a schematic structural diagram of a stopper in a packer according to an embodiment of the present invention;

9 is a schematic diagram of the connection between a threaded portion provided with a second limit block and a stopper in the packer provided by an embodiment of the present invention;

10 is a schematic structural diagram of a slip seat in a packer provided by an embodiment of the present invention;

11 is a schematic structural diagram of slips and slip springs in the packer provided by an embodiment of the present invention;

12 is a schematic structural diagram of unpacking in a packer according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a packer provided by an embodiment of the present invention when the grooves on the unpacking sleeve correspond to the mounting holes;

14 is a schematic diagram of a process in which the threaded portion presses the stopper into the groove when the center pipe is lifted up in the packer provided by the embodiment of the present invention.

icon:

110-center pipe; 111-limiting piece; 120-sleeve; 121-threaded piece; 122-first connecting piece; 123-installation hole; 124-stop piece; 125-second limit block; face; 127 - torque pin;

200-seal; 210-inner seal;

300-thrust part; 301-internal thread; 302-friction part; 310-connection part; 320-thrust part; 330-slip; 340-slip seat; 341-first through hole; 342-second connecting part; 343 - slotted hole; 350 - wedge table; 360 - slip spring;

400-unencapsulated; 410-third connector; 420-groove.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "length", "upper", "lower", "top", "bottom", "inner", "outer", "axial", The orientation or positional relationship indicated by "circumferential direction" and the like is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation , constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, terms such as "installation", "connection" and "fixing" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

Referring to FIG. 1 and FIG. 2 , an embodiment of the present invention provides a packer, including a base pipe; a sealing member 200 and a thrust member 300 are slidably sleeved outside the base pipe; a threaded portion is provided on the outer wall of the base pipe, The threaded portion is an external thread, the inner wall of the thrust member 300 is provided with an internal thread 301 adapted to the external thread, the outer wall of the thrust member 300 is provided with a friction portion 302 abutting against the inner wall of the wellbore; One end is in contact with the limiting portion, and the other end is in contact with the thrust member 300 .

When in use, the worker rotates the base pipe, and the threaded portion arranged outside the base pipe can drive the thrust member 300 adapted to the threaded portion to generate a tendency to rotate. friction, so that the rotation trend of the thrust member 300 is converted into an upward trend, so that the thrust member 300 can push and squeeze the sealing member 200, so that the sealing member 200 completes the sealing between the base pipe and the inner wall of the wellbore, and the operation is convenient, and there is no need to wait for the thermal film The temperature rises to open the seal 200 .

The sleeve 120 is provided with a threaded member 121, the threaded member 121 forms a threaded portion, and the threaded member 121 is annular.

Specifically, the threaded member 121 is fixedly sleeved on the outer wall of the base pipe. When the worker rotates the base pipe, the base pipe will drive the threaded member 121 to rotate, and the external thread of the threaded member 121 will drive the internal thread 301 of the thrust member 300, so that the thrust member 300 has a tendency to rotate, and the thrust member 300 cannot rotate under the action of the friction part 302, so the thrust member 300 will move to the seal member 200 under the driving of the screw member 121, and the thrust member 300 will cause compression to the seal member 200, so that the The sealing member 200 is in close contact with the inner wall of the wellbore to complete the sealing between the base pipe and the inner wall of the wellbore.

It should be noted that when the base pipe is rotated, the rotation direction of the base pipe makes the connection between the base pipe and other pipe strings in a tightened state, and the phenomenon of undercutting will not occur due to the rotation of the base pipe driving the thrust member 300 to press the sealing member 200 .

The friction part 302 provided on the outer wall of the thrust member 300 always keeps in contact with the wellbore, that is, when the thrust member 300 enters the wellbore with the base pipe, the friction part 302 starts to abut against the wellbore.

Specifically, the outer wall of the base pipe is provided with a limiting portion. When the thrust member 300 presses the sealing member 200, the sealing member 200 is restricted by the limiting portion, so that the sealing member 200 cannot slide synchronously with the thrust member 300. Therefore, the thrust member 300 can The sealing member 200 is squeezed, so that the sealing member 200 is raised to abut against the inner wall of the wellbore to complete the sealing.

Referring to FIG. 1 , in the optional solution of this embodiment, the base pipe includes a center pipe 110 and a sleeve 120 that is sealed and sleeved outside the center pipe 110 ; the sleeve 120 is connected to the center pipe 110 through a first connector 122 , After the first connecting member 122 is cut, the sleeve 120 can slide relative to the central pipe 110 ;

Specifically, the sleeve 120 is sleeved outside the central pipe 110, and the two are connected by the first connecting piece 122. When the staff rotates the central pipe 110, they can drive the sleeve 120 to rotate together, thereby driving the sleeve 120 to be fixed on the outer wall of the sleeve 120. The screw 121 rotates.

The sleeve 120 is provided with a torsion pin 127 that can transmit torque, and the torsion pin 127 can abut with the central tube 110, so that when the central tube 110 rotates, the sleeve 120 can be driven to rotate, and the torque is reduced during the rotation process. The impact of the first connecting piece 122 prevents the first connecting piece 122 from being accidentally cut off.

It should be pointed out that the sleeve 120 is provided with an inner sealing ring 210 , and the sleeve 120 is slidably sealed with the central pipe 110 through the inner sealing ring 210 .

Referring to FIG. 1 and FIG. 4 , in the optional solution of this embodiment, the thrust member 300 includes a connecting portion 310 and a thrust portion 320; the internal thread 301 is opened on the inner wall of the connecting portion 310, and one end of the thrust portion 320 is connected with the connecting portion 310, The other end is in contact with the seal 200 .

Specifically, the internal thread 301 in the connecting portion 310 is connected with the external thread of the threaded member 121. When the threaded member 121 rotates, it will push the connecting portion 310 to move toward the sealing member 200, and the connecting portion 310 will push the thrust portion 320, so that the thrust portion 320 can apply pressure to the seal 200 .

Referring to FIG. 1 , FIG. 4 , FIG. 10 and FIG. 11 , in an optional solution of this embodiment, the thrust member 300 further includes a slip 330 and a slip seat 340 ; the slip 330 is arranged on the slip through the slip spring 360 . inside the seat 340, and the first through hole 341 is formed on the slip seat 340; the slip 330 is located between the connecting part 310 and the thrust part 320, and under the pushing of the connecting part 310 and the thrust part 320, the slip 330 can protrude out of the first A through hole 341 .

The slip seat 340 is located between the connecting portion 310 and the thrust portion 320. When the connecting portion 310 is driven by the screw 121, the connecting portion 310 will squeeze the slips 330 in the slip seat 340, and the slips 330 will be squeezed from The first through hole 341 protrudes, and as the connecting portion 310 continues to move upward, the connecting portion 310 can make the slips 330 abut against the thrust portion 320 . At this time, the connecting portion 310 continues to move upward to exert pressure, and the slips 330 are Under the action of the connecting part 310 and the thrust part 320, the first through hole 341 will protrude to contact the inside of the wellbore, and the packer can be suspended by the slips 330 to prevent the packer from sliding up and down at will.

In addition, during the protruding process of the slips 330, the thrust portion 320 also squeezes the sealing member 200, so that the sealing member 200 completes the sealing work.

It should be noted that the slip seat 340 is hung on the thrust portion 320 , the slip seat 340 moves upward with the thrust portion 320 , and the slip 330 can be pushed out during the upward movement of the slip seat 340 .

Wherein, a plurality of slips 330 are arranged in the slip seat 340 , and the plurality of slips 330 are evenly distributed along the circumferential direction of the slip seat 340 .

It should be pointed out that the slip 330 is U-shaped, a limit plate is arranged in the middle of the first through hole 341, a slip spring 360 is arranged between the recessed area of the slip 330 and the limit plate, and the slip 330 is located between the connecting portion 310 and the limit plate. Under the action of the thrust portion 320, the first through hole 341 protrudes out of the first through hole 341 against the force of the slip spring 360. When the connection portion 310 and the thrust portion 320 no longer act on the slips 330, the slips 330 can act on the slip springs 360. and retract into the first through hole 341 .

Referring to FIG. 1 and FIG. 4 , in the optional solution of this embodiment, both ends of the connecting portion 310 and the thrust portion 320 facing the slips 330 are provided with a wedge-shaped table 350 for pushing the slips 330 .

Specifically, the slips 330 can be easily pushed through the wedge-shaped stage 350 , so that the slips 330 can protrude from the first through hole 341 . At the same time, through the setting of the wedge-shaped stage 350, the slips 330 can protrude from the first through hole 341 smoothly, and the phenomenon of being stuck will not occur.

Referring to FIG. 1 and FIG. 10 , in an optional solution of this embodiment, the slip seat 340 is connected to the connecting portion 310 through a second connecting member 342 that can transmit torque, and the friction portion 302 is provided on the slip seat 340 .

Specifically, the friction part 302 is fixed on the slip seat 340 , so when the packer enters the wellbore, the friction part 302 can limit the rotation of the slip seat 340 . Rotation of the connecting portion 310 .

The second connecting piece 342 is fixedly arranged on the connecting portion 310, the slip seat 340 is provided with a third through hole for installing the second connecting piece 342, and the third through hole is a slotted hole 343, and the length of the slotted hole 343 It extends along the axial direction of the slip seat 340 . When the connecting member is driven upward by the screw member 121 , the connecting portion 310 can drive the second connecting member 342 to move in the slot 343 , so that the connecting portion 310 will not affect the movement of the slip seat 340 .

Referring to FIGS. 3 , 5 , 6 , 7 , 8 and 9 , in the optional solution of this embodiment, the sleeve 120 is provided with a mounting hole 123 , and the mounting hole 123 is provided with a threaded member for 121 is connected to the stopper 124 so that the screw 121 cannot move along the axis of the base pipe; the stopper 124 is provided with a first limit block for transmitting torque, and the first limit block can abut with the screw 121 .

The screw 121 is fixedly installed on the sleeve 120 through the stopper 124, specifically, the stopper 124 is installed in the installation hole 123, the screw 121 is clamped on the stopper 124, and the stopper 124 can limit the screw 121 moves down.

In addition, the stopper 124 is provided with a first limit block. After the stopper 124 is connected with the screw 121, the first limit block can limit the rotation of the screw 121. When the sleeve 120 rotates, the stopper 124 can drive the screw 121 to rotate.

The screw 121 is provided with a second limit block 125 for transmitting torque, and the second limit block 125 can abut with the stopper 124 .

The screw member 121 is provided with a second limit block 125. After the stopper 124 is connected to the screw member 121, the second limit block 125 can limit the rotation of the screw member 121. When the sleeve 120 rotates, the stopper 124 can drive the screw 121 to rotate.

Specifically, after the screw 121 is set on the stopper 124, the screw 121 cannot move downward (away from the thrust portion 320), so when the stopper 124 is working normally, the screw 121 will not release the connection to the connection portion 310. Support, that is, the slips 330 can complete the normal hanging work and the sealing member 200 can normally complete the sealing work.

Referring to FIG. 1 , FIG. 12 , FIG. 13 , and FIG. 14 , in the optional solution of this embodiment, the bottom of the sleeve 120 is sleeved with an unencapsulated sleeve 400 , and the unencapsulated sleeve 400 is connected to the sleeve 120 through the third connection member 410 Connection; the mounting hole 123 is a second through hole, the top of the unpacking sleeve 400 can block the second through hole, and the outer wall of the unpacking sleeve 400 is provided with a groove 420 that can accommodate the stopper 124; the third connecting piece 410 is cut off Then, the groove 420 can correspond to the second through hole, and the threaded member 121 can push the stopper 124 into the groove 420, so that the threaded member 121 can slide relative to the stopper 124 along the axis of the base pipe; the outer wall of the central pipe 110 A limiting member 111 capable of abutting with the decapsulating sleeve 400 is provided, and the limiting member 111 is located below the decapsulating sleeve 400 .

Specifically, when it is necessary to release the seat seal of the packer, it is only necessary to lift the central pipe 110, the central pipe 110 will drive the limiting member 111 to move upward, and the limiting member 111 will move upward to abut against the unpacking sleeve 400, and along with the With the continuous upward movement of the central tube 110 , the limiting member 111 will drive the de-encapsulation sleeve 400 to move upward, and the de-encapsulating sleeve 400 will move upward along with the limiting member 111 after cutting the third connecting member 410 . When the unpacking sleeve 400 is in contact with the limiting table, the central tube 110 will drive the sleeve 120 to move up, and the groove 420 on the unpacking sleeve 400 will correspond to the second through hole, and the center pipe 110 will drive the sleeve 120 to move up. , because the seals 200 and the slips 330 arranged outside the sleeve 120 are in a fixed state, the slips 330 and the seals 200 will give the threaded part 121 a downward movement (with the sleeve 120) under the action of friction. At this time, the screw 121 will abut against the stopper 124, the screw 121 will press the stopper 124, and a part of the stopper 124 will fall into the groove 420 to prevent The part of the stopper 124 protruding from the second through hole is pressed into the second through hole, and then the stopper 124 no longer restricts the screw 121, and the screw 121 can move down with the connecting part 310 to release the slips 330 In a locked state with the sealing member 200 , the sleeve 120 can drive the thrust member 300 and the sealing member 200 to move up together with the central tube 110 .

In an optional solution of this embodiment, the stopper 124 is provided with an inclined surface 126 , and the screw 121 can abut against the inclined surface 126 .

Specifically, when the screw 121 is in contact with the stopper 124 , the inclined surface 126 is provided so that the stopper 124 can receive a downward (away from the thrust portion 320 ) component force and inward (into the second through hole) Therefore, when the groove 420 of the decapsulation sleeve 400 corresponds to the second through hole, the threaded member 121 can press the stopper 124 into the second through hole under the action of the upward movement of the central tube 110 .

It should be pointed out that the inclined surface 126 is provided on the part of the stopper 124 protruding from the second through hole, so the contact surface between the screw and the stopper 124 is the inclined surface 126, which can decompose the component forces in two directions , so that the stopper 124 can be driven.

An embodiment of the present invention provides a pipe string including a packer.

Compared with the prior art, the pipe string has the above advantages, which will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some or all of the technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A packer, characterized in that, comprising: a base pipe; A sealing member (200) and a thrust member (300) are slidably sleeved outside the base pipe; The outer wall of the base pipe is provided with a threaded portion, the threaded portion is an external thread, the inner wall of the thrust member (300) is provided with an internal thread (301) adapted to the external thread, and the outer wall of the thrust member (300) is provided with an internal thread (301) adapted to the external thread. a friction part (302) abutting against the inner wall of the wellbore is provided; The outer wall of the base pipe is provided with a limiting portion, one end of the sealing member (200) is in contact with the limiting portion, and the other end is abutted with the thrust member (300). 2 . The packer according to claim 1 , wherein the base pipe comprises a central pipe ( 110 ) and a casing ( 120 ) sealingly sleeved outside the central pipe ( 110 ); 2 . The sleeve (120) is connected with the central pipe (110) through a first connecting piece (122), and after the first connecting piece (122) is cut off, the sleeve (120) can be connected with the The central tube (110) slides relatively; The sealing member (200) and the thrust member (300) are both sleeved on the sleeve (120), and the threaded portion is disposed outside the sleeve (120). 3. The packer according to claim 2, wherein the thrust member (300) comprises a connecting portion (310) and a thrust portion (320); The inner thread (301) is opened on the inner wall of the connecting portion (310), one end of the thrust portion (320) is connected with the connecting portion (310), and the other end is in contact with the sealing member (200). 4. The packer according to claim 3, wherein the thrust member (300) further comprises a slip (330) and a slip seat (340); The slips (330) are arranged in the slip seat (340) through a slip spring (360), and a first through hole (341) is defined on the slip seat (340); The slips (330) are located between the connecting portion (310) and the thrust portion (320), and the slips (320) are pushed by the connecting portion (310) and the thrust portion (320). (330) can protrude from the first through hole (341). 5. The packer according to claim 4, characterized in that, one end of the connecting part (310) and the thrust part (320) facing the slip (330) is provided with a device for pushing the slip Wedge table (350) of tile (330). 6 . The packer according to claim 4 , wherein the slip seat ( 340 ) is connected with the connecting part ( 310 ) through a second connecting piece ( 342 ) that can transmit torque, and the friction The part (302) is arranged on the slip seat (340). 7. The packer according to claim 2, characterized in that a threaded member (121) is provided on the casing, the threaded member (121) forms the threaded portion, and the casing (120) A mounting hole (123) is opened on the top, and a stopper (124) for connecting with the screw (121) is arranged in the mounting hole (123), so that the screw (121) cannot follow the Base pipe axis movement; The stopper (124) is provided with a first limit block for transmitting torque, and the first limit block can abut with the threaded member (121); Or, the screw (121) is provided with a second limit block (125) for transmitting torque, and the second limit block (125) can abut with the stopper (124). 8 . The packer according to claim 7 , characterized in that an unpacking sleeve ( 400 ) is sleeved at the bottom inside the casing ( 120 ), and the unpacking sleeve ( 400 ) passes through a third connecting piece ( 410 ). ) is connected with the sleeve (120); The mounting hole (123) is a second through hole, the top of the decapsulation sleeve (400) can block the second through hole, and the outer wall of the decapsulation sleeve (400) is provided with a stopper capable of accommodating the stopper groove (420) of (124); After the third connecting piece (410) is cut off, the groove (420) can correspond to the second through hole, and the threaded piece (121) can push the stop piece (124) into in the groove (420), so that the screw (121) can slide relative to the stopper (124) along the axis of the base pipe; The outer wall of the central tube (110) is provided with a limiter (111) capable of abutting with the unsealing sleeve (400), and the limiter (111) is located below the unsealing sleeve (400). 9. The packer according to claim 8, characterized in that, an inclined surface (126) is provided on the stopper (124), and the screw (121) can be connected with the inclined surface (126) Abut. 10. A pipe string, characterized by comprising the packer according to any one of claims 1-9.

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