Anchoring packer releasing tool

Abstract

The invention belongs to the technical field of downhole tools, and particularly relates to an anchoring, packing and releasing tool. The anchoring, packing and releasing tool comprises a base tube, a sealing sleeve and a sealing sleeve, wherein a connecting hole is formed in the tube wall of the base tube; the moving assembly is arranged on the outer side of the base pipe and is used for anchoring and / or packing in response to the pressure transmitted by the connecting hole; the central tube is arranged on the inner side of the base tube, and a pressure transmitting hole communicated with the connecting hole is formed in the tube wall of the central tube; the ball seat is arranged in the central pipe through a shear pin; the locking block is arranged on the pipe wall of the central pipe in a radial penetrating mode, in the first state, the first end of the locking block abuts against the ball seat in the radial direction, and the second end of the locking block is located in the base pipe, so that the base pipe and the central pipe are locked, in the second state, the ball seat moves relative to the central pipe, radial abutting against the locking block is relieved, and therefore the locking block is separated from the base pipe; and the central tube is separated from the base tube.

Description

Technical Field

[0001] The present invention belongs to the technical field of downhole tools, and in particular, relates to an anchoring and isolation releasing tool. Background Art

[0002] Secondary branch wells are usually completed in open holes, which are prone to wellbore collapse due to changes in formation stress during later production, resulting in a decrease in production capacity.

[0003] At present, the completion method of running a screen in the secondary branch wellbore is usually used to avoid wellbore collapse. However, after the screen is run in, there is a lack of dedicated drop-and-anchor tools, and the screen will move axially in the wellbore. The branch wellbore is first drilled and the screen is run in. When the main wellbore is drilled later, if the screen in the branch wellbore is not anchored, the screen may slide out of the branch wellbore due to the vibration generated during drilling, causing problems such as resistance and drill jamming.

[0004] In addition, if there is a sand production problem in the branch wellbore, the formation sand may enter the main wellbore axially from the outside of the screen, affecting the subsequent production and subsequent output.

[0005] Chinese patent document CN104481438B discloses a branch well open hole anchoring tie-back completion process and its liner delivery tool. The open hole tie-back tube is connected to the top of the liner string, and the open hole anchor is connected between any casing between the bottom ball seat and the open hole tie-back tube; the liner delivery tool, open hole tie-back tube, open hole anchor, bottom ball seat and liner completion string are lowered into the well to a predetermined position, the first ball is put in, the pressure is held to open the open hole anchor, the entire string is anchored in the well, and the pressure is continued to increase to re-connect the bottom ball seat, so that the circulation can be re-established. The tool involved in this patent needs to be used in conjunction with other tool parts, and the operation process is relatively complicated.

[0006] Chinese patent document CN202882816U discloses an oilfield drilling and completion tool. The slip seat of the tool is fixed on the central tube I by screws, and the slips and support rods are installed at the reserved position between the central tube I, the slip seat and the extended two-stage push tube. The extended two-stage push tube is fixed on the central tube I by pins, and the force transmission tube is connected to the extended two-stage push tube by threads and an anti-retraction ring is installed between the two. The central tube I is designed with a sawtooth buckle to match the anti-retraction ring. The hydraulic cylinder and the piston are connected to the force transmission tube through the central tube II. The lower part of the central tube II is connected to the hand release mechanism, and the upper part of the hydraulic cylinder is designed with a drill rod buckle that can be connected to the drill rod. The utility model realizes the completion of the screen tube suspension, has good stability, simple structure, improves the stability of the wellbore wall of the fishbone wellbore, improves the completion quality of the fishbone branch wellbore, and extends the production cycle of the fishbone well. This patent can realize the anchoring of the screen string in the branch wellbore, but the tool does not have a sealing function and cannot prevent the formation sand from entering the main wellbore through the annular gap between the tool and the formation, and the structure is relatively complex.

[0007] Chinese patent document CN102418503B discloses a branch well screen anchoring compensation device, which consists of four parts: hydraulic setting, release, compensation and anchoring. It realizes four main functions in one device: two-stage hydraulic cylinder, rotary anchoring, lifting or rotary release, and drillable compensation casing. The anchoring compensation device uses four powerful anchor claws to anchor the entire branch well screen string in the wellbore, preventing the screen string from moving from the branch wellbore to the main wellbore in future production, hindering the lowering of the production pipe string in the main wellbore and affecting the production of the oil well. The pipe anchoring compensation device enables the screen in the branch wellbore to support the well wall and prevent sand, which can extend the service life of the branch wellbore and increase the production of a single well. This patent can realize the anchoring of the screen string in the branch wellbore, but the tool does not have a sealing function, cannot prevent the formation sand from entering the main wellbore from the annular gap between the tool and the formation, and the structure is relatively complex.

[0008] Therefore, there is an urgent need to develop an anchoring, isolation and release device that can be used for a screen string. Summary of the invention

[0009] In view of the technical problems mentioned above, the present invention aims to provide an anchoring, isolation and releasing tool, which can complete the anchoring, isolation and releasing processes of the screen string at one time without the need for additional downhole tools, thereby simplifying the operation process.

[0010] According to the present invention, there is provided an anchoring and packing release tool, comprising:

[0011] A base pipe, wherein a connecting hole is provided on a pipe wall of the base pipe;

[0012] a moving assembly disposed outside the base pipe for anchoring and / or isolating in response to pressure transmitted by the connecting hole;

[0013] A central tube disposed inside the base tube, wherein a pressure transmission hole communicating with the connecting hole is disposed on the tube wall of the central tube;

[0014] A ball seat disposed within the center tube via a shear pin; and

[0015] A locking block is radially penetrated on the wall of the central tube, wherein:

[0016] In the first state, the first end of the locking block is radially in contact with the ball seat, and the second end of the locking block is located in the base pipe, thereby locking the base pipe and the center pipe.

[0017] In the second state, the ball seat moves relative to the central tube to release the radial abutment on the locking block, so that the locking block is separated from the base tube, thereby separating the central tube from the base tube.

[0018] In a specific embodiment, a recovery groove is provided on the outer wall of the ball seat. In a first state, the recovery groove is located above the locking block. In a second state, the recovery groove and the locking block are at the same height.

[0019] In a specific embodiment, a small diameter portion is provided at the lower end of the central tube, and the inner diameter of the small diameter portion is smaller than the outer diameter of the ball seat.

[0020] In a specific embodiment, in the second state, the lower end of the ball seat is in axial contact with the small diameter portion.

[0021] In a specific embodiment, a locking groove for accommodating the locking block is provided on the base pipe.

[0022] In a specific embodiment, a connecting nipple for connecting other downhole tools is provided at the lower end of the base pipe.

[0023] In a specific embodiment, the upper end of the connecting short section is configured as the lower end of the locking groove.

[0024] In a specific embodiment, the moving assembly includes a cone sleeve, an anchor sleeve and a liquid cylinder which are axially arranged in sequence on the outside of the base pipe, the cone sleeve is fixedly arranged on the base pipe, and the liquid cylinder is configured to be able to move axially relative to the base pipe in response to the pressure of the connecting hole, thereby pushing the anchor sleeve to move relative to the cone sleeve to complete anchoring.

[0025] In a specific embodiment, a sealing tube is arranged between the liquid cylinder and the anchor sleeve.

[0026] In a specific embodiment, a dust cover for protecting the moving component is fixedly provided on the outer side of the central tube, and the dust cover is located at the upper end of the moving component.

[0027] Compared with the prior art, the advantages of the present application are as follows.

[0028] The present invention is specially used for anchoring, isolating and releasing the branch wellbore when the screen pipe is lowered into the branch wellbore in the secondary branch well, which can prevent the subsequent drilling problems caused by the sliding of the screen pipe string in the branch wellbore during drilling, and can cooperate with the screen pipe in the branch wellbore to block the formation sand, preventing a large amount of formation sand from entering the main wellbore to cause blockage and affect the production.

[0029] On the one hand, the ball seat of the present invention is used to cooperate with the sealing ball to provide the pressure required for anchoring and sealing for the mobile component. On the other hand, the ball seat abuts the locking block, so that the locking block locks the central pipe and the base pipe. When the ball seat moves downward relative to the central pipe, the ball seat can release the abutment on the locking block, so that the locking block can be separated from the base pipe, and then the central pipe and the base pipe are separated to complete the release. The process of anchoring, sealing and releasing can be completed by simply adjusting the pressure of the drilling fluid, and the operation is simple.

[0030] The anchoring and sealing processes of the present invention are performed in no particular order as is the process of releasing the anchor, and the operation is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be described below with reference to the accompanying drawings.

[0032] Figure 1 A schematic diagram showing an embodiment of a first state of an anchor packer release tool according to the present invention;

[0033] Figure 2 A schematic diagram showing an embodiment of a second state of an anchor packer release tool according to the present invention;

[0034] Figure 3 A schematic diagram showing an embodiment of the movable assembly of the anchoring and isolation releasing tool according to the present invention when completing anchoring and isolation.

[0035] In the figure:

[0036] 1. Base pipe;

[0037] 2. Moving assembly; 21. Cone sleeve; 22. Anchor sleeve; 23. Liquid cylinder; 24. Packer tube;

[0038] 3. Connecting hole; 4. Center tube; 5. Pressure transmission hole; 6. Shear pin; 7. Ball seat; 8. Locking block; 9. Recovery groove; 10. Small diameter part; 11. Locking groove; 12. Connecting short section; 13. Dust cover; 14. Sealing ball; 100. Anchoring and packing release tool.

[0039] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn according to the actual scale. DETAILED DESCRIPTION

[0040] The present invention will be described below with reference to the accompanying drawings.

[0041] It should be noted that the directional terms or qualifiers "upper" and "lower" used in this application are all directed to the referenced Figure 1 They are not intended to define the absolute positions of the components involved, but may vary depending on the specific circumstances.

[0042] Figure 1 The structure of the anchoring and packing release tool 100 according to the present invention is shown. Figure 1 As shown, the anchoring and isolation releasing tool 100 includes a base pipe 1, a moving assembly 2, a central pipe 4, a ball seat 7 and a locking block 8.

[0043] The base tube 1 is constructed in a shape similar to a cylindrical tube, and a connecting hole 3 for connecting the inner and outer cavities of the base tube 1 is provided on the tube wall of the base tube 1 .

[0044] The moving assembly 2 is configured to be activated in response to the pressure of the drilling fluid, thereby achieving anchoring and / or isolation. The moving assembly 2 is coaxially sleeved on the outside of the base pipe 1, and the position of the moving assembly 2 for responding to the drilling fluid is connected to the connecting hole 3, and the drilling fluid pressure inside the anchoring and isolation releasing tool 100 can be transmitted to the moving assembly 2 through the connecting hole 3.

[0045] The central tube 4 is configured to be approximately cylindrical. The central tube 4 is coaxially and sealedly sleeved on the inner side of the base tube 1, and the length of the central tube 4 is greater than the length of the base tube 1, and the upper end of the central tube 4 exceeds the length range of the base tube 1. A pressure transmission hole 5 is provided on the tube wall of the central tube 4 to connect the inner and outer cavities of the central tube 4, and the pressure transmission hole 5 is connected to the connecting hole 3 of the base tube 1. Specifically, the central axis of the pressure transmission hole 5 coincides with the central axis of the connecting hole 3.

[0046] The ball seat 7 is located below the pressure transmission hole 5 and is set in the central tube 4 through the shear pin 6. A sealing ring (not shown) is provided between the outer wall of the ball seat 7 and the inner wall of the central tube 4. The ball seat 7 can cooperate with the sealing ball 14 to form a seal to block the inner cavity of the central tube 4. After the inner cavity of the central tube 4 is blocked by the ball seat 7 and the sealing ball 14, the drilling fluid pressure in the central tube 4 can be transmitted to the moving component 2 through the pressure transmission hole 5 and the connecting hole 3, so that the moving component 2 can be anchored and isolated.

[0047] The locking block 8 is radially and penetratingly arranged on the wall of the central tube 4. Specifically, a guide hole is arranged on the wall of the central tube 4 to connect the inner and outer cavities, and the locking block 8 is slidably arranged in the guide hole. Under this arrangement, the locking block 8 can move radially on the wall of the central tube 4, so that the radial ends of the central tube 4 can be in different positions under different conditions.

[0048] In the first state, the first end of the locking block 8 is radially abutted against the ball seat 7, that is, the radial inner end of the locking block 8 is abutted against the outer wall of the ball seat 7. At the same time, the second end of the locking block 8 is located in the base pipe 1, that is, the radial outer end of the locking block 8 extends into the base pipe 1, so that the locking block 8 is abutted against the base pipe 1 on both the upper and lower sides of the axial direction of the anchoring and packing release tool 100, so that the base pipe 1 cannot move axially relative to the central pipe 4, and the base pipe 1 and the central pipe 4 are axially locked to each other. Therefore, in the first state, the upper end of the central pipe 4 is connected to the well-entering tool, and the well-entering tool can drive the entire anchoring and packing release tool 100 into the well.

[0049] In the second state, the ball seat 7 moves relative to the central pipe 4, releasing the radial abutment on the locking block 8, so that the locking block 8 is separated from the base pipe 1, and the central pipe 4 is separated from the base pipe 1. Specifically, after the setting ball 14 enters the ball seat 7 to form a seal, the shear pin 6 is sheared by increasing the drilling fluid pressure, so that the ball seat 7 moves downward relative to the central pipe 4.

[0050] Furthermore, a recovery groove 9 is provided on the outer wall of the ball seat 7, and the shape of the recovery groove 9 is configured to accommodate the locking block 8, so that the locking block 8 can move radially inward relative to the central tube 4. In the first state, the recovery groove 9 is located above the locking block 8, and in the second state, the ball seat 7 moves downward until the recovery groove 9 and the locking block 8 are at the same height, so that the locking block 8 can move radially inward relative to the central tube 4, thereby separating the locking block 8 from the base tube 1, and realizing the separation of the central tube 4 from the base tube 1.

[0051] In a specific embodiment, a locking groove 11 is provided on the inner wall of the base pipe 1, and the locking groove 11 is configured to accommodate a locking block 8. After the locking block 8 enters the locking groove 11, both the upper and lower sides of the locking block 8 contact the base pipe 1, so that the locking block 8 cannot move axially relative to the base pipe 1, and further the center pipe 4 cannot move axially relative to the base pipe 1.

[0052] According to the present invention, in a preferred embodiment, a small diameter portion 10 is provided at the lower end of the central tube 4, and the inner diameter of the small diameter portion 10 is smaller than the outer diameter of the ball seat 7. In the second state, the lower end of the ball seat 7 is in axial contact with the small diameter portion 10. That is, when the ball seat 7 cuts off the shear pin 6 under the pressure of the drilling fluid and moves downward relative to the central tube 4, it will abut against the upper part of the small diameter portion 10, and at this time, the recovery groove 9 on the ball seat 7 and the locking block 8 are at the same height.

[0053] Under this configuration, the small diameter portion 10 has multiple beneficial effects. On the one hand, the small diameter portion 10 can prevent the ball seat 7 from falling into the well. On the other hand, the small diameter portion 10 can provide positioning for the ball seat 7 so that the recovery groove 9 is aligned with the locking block 8. On the one hand, the small diameter portion 10 prevents the ball seat 7 from falling off the central pipe 4, so that the ball seat 7 can always block the inner cavity of the central pipe 4, thereby making it unnecessary to have a specific sequence for the anchoring isolation process and the releasing process of the present invention.

[0054] According to the present invention, in a preferred embodiment, a connecting nipple 12 for connecting other downhole tools is provided at the lower end of the base pipe 1. The upper end of the connecting nipple 12 is configured as the lower end of the locking groove 11. Under this arrangement, after the connecting nipple 12 is disassembled from the lower end of the base pipe 1, the locking block 8 can be assembled from the bottom of the base pipe 1, thereby facilitating the assembly of the anchoring and packing release tool 100.

[0055] In a specific embodiment, the moving assembly 2 includes a cone sleeve 21 , an anchor sleeve 22 and a hydraulic cylinder 23 .

[0056] The cone sleeve 21, the anchor sleeve 22 and the hydraulic cylinder 23 are sequentially arranged on the outer side of the base pipe 1 from top to bottom in the axial direction. The cone sleeve 21 is configured as a ring with a certain taper on the outer side, and the taper surface of the cone sleeve 21 faces the anchor sleeve 22. The anchor sleeve 22 includes a plurality of anchoring sheets (not shown) arranged in the circumferential direction. When the anchor sleeve 22 moves upward relative to the cone sleeve 21, the anchoring sheets can expand radially under the taper of the cone sleeve 21, thereby abutting against the inner wall of the wellbore to complete anchoring. The hydraulic cylinder 23 is configured to be able to move axially relative to the base pipe 1 in response to the pressure of the connecting hole 3, thereby pushing the anchor sleeve 22 to move relative to the cone sleeve 21 to complete anchoring. Specifically, after the sealing sleeve of the hydraulic cylinder 23 is arranged on the outer side of the base pipe 1, an annulus is formed between the hydraulic cylinder 23 and the base pipe 1, and the annulus is connected to the connecting hole 3. The area of ​​the upper pressure difference working surface of the hydraulic cylinder 23 is larger than the cotton knot of the lower pressure difference working surface, and the hydraulic cylinder 23 can move upward under the pressure difference.

[0057] In a preferred embodiment, a packing tube 24 is provided between the hydraulic cylinder 23 and the anchoring sleeve 22. The hydraulic cylinder 23 can push the packing tube 24 and the anchoring sleeve 22 to move upwards in the process of moving upwards relative to the base pipe 1. The anchoring sleeve 22 expands radially under the action of the cone sleeve 21 to complete the anchoring. The packing tube 24 expands radially under axial compression and abuts against the inner wall of the wellbore to complete the isolation.

[0058] In a preferred embodiment, a dust cover 13 for protecting the moving component 2 is fixedly arranged on the outer side of the central tube 4, and the dust cover 13 is located at the upper end of the moving component 2. Specifically, the lower end of the dust cover 13 is inserted into the inner side of the cone sleeve 21, that is, the radial inner and outer sides of the lower end of the dust cover 13 are in contact with the central tube 4 and the cone sleeve 21 respectively.

[0059] In a preferred embodiment, the cone sleeve 21 is fixedly connected to the base pipe 1 by means of a threaded connection.

[0060] In a preferred embodiment, the connecting nipple 12 is fixedly connected to the base pipe 1 by threaded connection.

[0061] In a preferred embodiment, the packing tube 24 is configured as a rubber tube.

[0062] According to the present invention, the method of using the anchor packer release tool 100 is as follows.

[0063] First follow Figure 1 As shown, the anchoring and isolation releasing tool 100 is assembled, the lower end of the connecting short section 12 is connected to the screen string, and the upper end of the central pipe 4 is connected to the well tool.

[0064] After the anchoring and packing release tool 100 is lowered to the designated position, the sealing ball 14 is dropped into the tool until the sealing ball 14 enters the ball seat 7 to seal the inner cavity of the central pipe 4 .

[0065] The drilling fluid is pumped into the central pipe 4 to pressurize the ball seat 7 to cut the shear pin 6, and the ball seat 7 moves downward to axially abut against the small diameter portion 10. At the same time, the recovery groove 9 and the locking block 8 are at the same height, and the locking block 8 can move radially inward, thereby releasing the lock on the central pipe 4 and the base pipe 1. The central pipe 4 can be separated from the base pipe 1 by lifting the central pipe 4, and the release is realized. Figure 2 shown.

[0066] The pumping pressure of the drilling fluid is increased, and the pressure is transmitted to the fluid cylinder 23 through the pressure transmission hole 5 and the connecting hole 3. The fluid cylinder 23 moves upward, and the anchor sleeve 22 and the isolation tube 24 are radially expanded to complete the anchoring and isolation between the outer wall of the base pipe 1 and the inner wall of the wellbore. Figure 3 shown.

[0067] Finally, the central pipe 4 is lifted up, and the dust cover 13, ball seat 7, sealing ball 14 and locking block 8 are all moved out of the well along with the central pipe 4, while the base pipe 1, cone sleeve 21, anchor sleeve 22, hydraulic cylinder 23, isolation tube 24 and connecting short section 12 remain in the well.

[0068] It should be noted that the above-mentioned anchoring, sealing and releasing processes can be switched in order by adjusting the strength of the shear pin 6 or the response pressure of the hydraulic cylinder 23 .

[0069] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anchor packer release tool, include: A base pipe (1), wherein a connecting hole (3) is provided on a pipe wall of the base pipe (1); A moving assembly (2) disposed on the outside of the base pipe (1) and used for anchoring and / or sealing in response to the pressure transmitted by the connecting hole (3); A central tube (4) arranged inside the base tube (1), wherein a pressure transmission hole (5) communicating with the connecting hole (3) is arranged on the tube wall of the central tube (4); a ball seat (7) disposed in the central tube (4) via a shear pin (6); and A locking block (8) is radially penetrated and arranged on the wall of the central tube (4), wherein: In the first state, the first end of the locking block (8) is radially abutted against the ball seat (7), and the second end of the locking block (8) is located inside the base pipe (1), thereby locking the base pipe (1) and the center pipe (4). In the second state, the ball seat (7) moves relative to the central tube (4) to release the radial abutment on the locking block (8), thereby causing the locking block (8) to detach from the base tube (1), thereby separating the central tube (4) from the base tube (1).

2. The anchor packer release tool according to claim 1, It is characterized in that A recovery groove (9) is provided on the outer wall of the ball seat (7); in a first state, the recovery groove (9) is located above the locking block (8); in a second state, the recovery groove (9) and the locking block (8) are at the same height.

3. The anchoring and packing release tool according to claim 2, It is characterized in that A small diameter portion (10) is provided at the lower end of the central tube (4), and the inner diameter of the small diameter portion (10) is smaller than the outer diameter of the ball seat (7).

4. The anchor packer release tool according to claim 3, It is characterized in that In the second state, the lower end of the ball seat (7) is in axial contact with the small diameter portion (10).

5. The anchor packer release tool according to any one of claims 1 to 4, It is characterized in that A locking groove (11) for accommodating the locking block (8) is provided on the base pipe (1).

6. The anchor packer release tool according to claim 5, It is characterized in that A connecting nipple (12) for connecting other downhole tools is provided at the lower end of the base pipe (1).

7. The anchor packer release tool according to claim 6, It is characterized in that The upper end of the connecting short section (12) is configured as the lower end of the locking groove (11).

8. The anchor packer release tool according to any one of claims 1 to 7, It is characterized in that The moving assembly (2) comprises a cone sleeve (21), an anchor sleeve (22) and a hydraulic cylinder (23) which are sequentially arranged along the axial direction on the outer side of the base pipe (1); the cone sleeve (21) is fixedly arranged on the base pipe (1); and the hydraulic cylinder (23) is configured to be able to move axially relative to the base pipe (1) in response to the pressure of the connecting hole (3), thereby pushing the anchor sleeve (22) to move relative to the cone sleeve (21) to complete anchoring.

9. The anchor packer release tool according to claim 8, It is characterized in that A sealing tube (24) is arranged between the liquid cylinder (23) and the anchor sleeve (22).

10. The anchor packer release tool according to any one of claims 1 to 9, It is characterized in that A dust cover (13) for protecting the moving component (2) is fixedly arranged on the outside of the central tube (4), and the dust cover (13) is located at the upper end of the moving component (2).

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