Packer capable of preventing leakproofness from being damaged

Abstract

The utility model discloses a packer capable of avoiding leakproofness damage. The packer comprises a slip and a slip bowl, and the slip comprises a clamping head and a sliding head; a sliding groove is formed in the slip bowl, the sliding head is arranged in the sliding groove in a sliding mode in the radial direction of the packer, and a sliding roller is arranged in the sliding groove. The sliding roller is arranged at the bottom of the sliding groove, and when the slip moves outwards under the action of the cone, the bottom wall of the sliding head is in rolling fit with the sliding roller, so that friction between the slip and the slip bowl is reduced, friction loss is reduced, the service life of the whole packer is prolonged, and the sealing performance of the whole packer is further guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of packers, and in particular to a packer capable of preventing damage to its sealing performance. Background Art

[0002] A packer is a device used to isolate, separate or protect the interaction between different substances. When working, the packer is set in an external pipe. When the two ends of the packer are subjected to axial external forces, the rubber barrel on the packer will expand due to the extrusion force, causing the rubber barrel to abut against the inner wall of the external pipe, thereby dividing the space inside the external pipe into two isolated parts, thereby forming a blockage.

[0003] The patent document with announcement number CN210289701U discloses a self-locking Y211 seal. By setting a locking ring and a retaining spring, after the seal is set, even when the external force disappears, the locking cooperation of the locking ring and the retaining spring limits the movement of the central tube, so that the sealing mechanism can still maintain a radially expanded state, thereby ensuring the sealing performance. It has certain positive significance, but there are also certain disadvantages. For example, in actual work, the radial outward movement of the cava is achieved through the inclined surface between the outer wall of the cone and the inner wall of the cava. Therefore, the cava will inevitably be subjected to a downward force while moving outward, that is, sliding friction will occur between the bottom of the cava and the cava seat every time the sealing work is performed, and there is a certain risk of wear. Utility Model Content

[0004] The purpose of this application is to solve the above problems and provide a packer that avoids damage to the sealing performance.

[0005] To achieve the above objectives, the technical solution of this application is:

[0006] A packer for preventing loss of airtightness comprises a slip and a slip seat, wherein the slip comprises a clamping joint and a sliding head; a sliding groove is provided on the slip seat, the sliding head is radially slidably arranged in the sliding groove along the packer, and a sliding roller is provided in the sliding groove.

[0007] Preferably, it further includes a first spring, one end of which is connected to the side wall of the sliding groove, and the other end is connected to the side wall of the sliding head, so as to drive the sliding head to move back toward the center of the slip seat.

[0008] Preferably, a first mounting groove is provided on both side walls of the sliding groove, and a second mounting groove is correspondingly provided on the two side walls of the sliding head. The first mounting groove is open on one side facing the center of the cava seat, and the second mounting groove is open on the side facing away from the center of the cava seat. One end of the first spring is connected to the inner side wall of the first mounting groove away from the center of the cava seat, and the other end is connected to the inner side wall of the second mounting groove close to the center of the cava seat. The first spring is in a stretched state.

[0009] Preferably, the two opposite side walls of the sliding groove are arranged at an angle, and the opening relatively located inside the slip seat is larger than the opening inside.

[0010] Preferably, the number of the sliding rollers is two, the two sliding rollers are arranged radially along the cava seat, and the height of the sliding roller relatively close to the center of the cava seat is higher than the other sliding roller; the bottom side wall of the sliding head is inclined, and the side away from the center of the cava seat is relatively lower.

[0011] Preferably, a limiting groove is provided on the end surface of the slip seat facing the slip corresponding to the sliding groove, the limiting groove is located above the sliding groove, and the width of the limiting groove is smaller than the width of the sliding groove.

[0012] Preferably, a third mounting groove is provided on the side wall of the limit groove, and a fourth mounting groove is correspondingly provided on the cava, the third mounting groove is opened on the side facing the center of the cava seat, and the fourth mounting groove is opened on the side facing away from the center of the cava seat; and a second spring is also included, one end of the second spring is connected to the inner side wall of the third mounting groove away from the center of the cava seat, and the other end is connected to the inner side wall of the fourth mounting groove close to the center of the cava seat, and the second spring is in a stretched state.

[0013] The present application discloses a packer that avoids damage to its airtightness. A sliding roller is arranged at the bottom of a sliding groove. When the slip moves outward under the action of the cone, the bottom wall of the sliding head rolls with the sliding roller, thereby reducing the friction between the slip and the slip seat, reducing friction loss, increasing the service life of the entire packer, and further ensuring the sealing of the entire packer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;

[0016] Figure 3 This is a schematic diagram of the slip structure in this application;

[0017] Figure 4 This is a schematic diagram of the structure of the slips in this application from another angle;

[0018] Figure 5 This is a schematic diagram of the slip seat structure in this application;

[0019] Figure 6 This is a structural diagram of the slip seat from another angle in this application.

[0020] In the picture:

[0021] 1. Slip; 10. Sliding head; 100. Second mounting slot; 11. Connecting part; 110. Fourth mounting slot; 12. Card joint; 2. Slip seat; 20. Sliding slot; 21. Sliding roller; 22. First mounting slot; 23. First spring; 24. Limiting slot; 25. Third mounting slot; 26. Second spring; 3. Cone. DETAILED DESCRIPTION

[0022] The present application will now be described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the present application in a schematic manner, and therefore only show the components related to the present application.

[0023] like Figure 1-6 As shown, a packer for preventing loss of airtightness includes a slip 1 and a slip seat 2. The slip 1 includes a card joint 12 and a sliding head 10. A sliding groove 20 is provided on the slip seat 2. The sliding head 10 is set in the sliding groove 20 for radial sliding along the packer. A sliding roller 21 is provided in the sliding groove 20.

[0024] The slip seat 2 is in a circular ring structure, and the number of slips 1 is multiple, specifically four, and they are evenly spaced along the circumference of the slip seat 2.

[0025] A snap-fit groove is provided on the cone 3, which is used to cooperate with the snap joint 12. When the cone 3 descends, its outer inclined side wall and the inner side wall of the snap joint 12 are snapped together, so that the slip 1 can slide radially outward along the sliding groove 20. Due to the limitation of the snap-fit groove, the slip 1 can only slide when the cone 3 and the slip 1 slide relative to each other.

[0026] By arranging a sliding roller 21 at the bottom of the sliding groove 20, when the cava 1 moves outward under the action of the cone 3, the bottom wall of the sliding head 10 rolls with the sliding roller 21, thereby reducing the friction between the cava 1 and the cava seat 2, reducing friction loss, improving the service life of the entire packer, and further ensuring the sealing of the entire packer.

[0027] In some further embodiments, a first spring 23 is further included, one end of the first spring 23 is connected to the side wall of the sliding groove 20, and the other end is connected to the side wall of the sliding head 10 to drive the sliding head 10 to move back toward the center of the slip seat 2.

[0028] Since the driving of the cava 1 by the cone 3 is achieved through the inclined surface, that is, it is achieved through the radial component force generated on the inclined surface, therefore, in order to ensure that the cava 1 can move radially outward while the cone 3 moves, a first spring 23 is specially provided. The first spring 23 can provide a certain auxiliary effect when the cava 1 moves outward relative to the cava seat 2, thereby avoiding the phenomenon of the cava 1 getting stuck.

[0029] In some further embodiments, a first mounting groove 22 is provided on both side walls of the sliding groove 20, and a second mounting groove 100 is correspondingly provided on both side walls of the sliding head 10. The first mounting groove 22 is open on one side facing the center of the cava seat 2, and the second mounting groove 100 is open on the side facing away from the center of the cava seat 2. One end of the first spring 23 is connected to the inner side wall of the first mounting groove 22 away from the center of the cava seat 2, and the other end is connected to the inner side wall of the second mounting groove 100 close to the center of the cava seat 2. The first spring 23 is in a stretched state.

[0030] Since the sliding head 10 and the sliding groove 20 will move relative to each other, in order to avoid affecting the normal function of the first spring 23, a first mounting groove 22 and a second mounting groove 100 are specially provided, so that the first spring 23 is located in the first mounting groove 22 and the second mounting groove 100, and the side wall of the sliding head 10 and the side wall of the sliding groove 20 interfere with the first spring 23.

[0031] In some further embodiments, two opposite side walls of the sliding groove 20 are inclined, and the opening relatively located inside the slip seat 2 is larger than the opening inside.

[0032] The two side walls of the sliding groove 20 are arranged at an angle, thereby preventing the sliding head 10 from sliding directly out of the sliding groove 20 .

[0033] In some further embodiments, the number of sliding rollers 21 is two, the two sliding rollers 21 are arranged radially along the kava seat 2, and the height of one sliding roller 21 relatively close to the center of the kava seat 2 is higher than the other sliding roller 21; the bottom side wall of the sliding head 10 is inclined, and the side away from the center of the kava seat 2 is relatively low.

[0034] One sliding roller 21 near the center of the slip seat 2 is higher than the other sliding roller 21, making it easier for the slip 1 to slide out of the sliding groove 20; the side walls at the bottom of the sliding head 10 are also tilted to accommodate two sliding rollers 21 of different heights.

[0035] In some further embodiments, a limiting groove 24 is provided on the end surface of the slip seat 2 facing the slip 1 corresponding to the sliding groove 20 . The limiting groove 24 is located above the sliding groove 20 , and the width of the limiting groove 24 is smaller than the width of the sliding groove 20 .

[0036] A connecting portion 11 is provided between the sliding head 10 and the card joint 12 in the cava 1. The connecting portion 11 is narrower than the sliding head 10. When the cava 1 slides outward, the sliding groove 20 and the sliding head 10, the connecting portion 11 and the limiting groove 24 slide and cooperate synchronously, and the cava 1 is limited at the same time.

[0037] In some further embodiments, a third mounting groove 25 is provided on the side wall of the limit groove 24, and a fourth mounting groove 110 is correspondingly provided on the cava 1. The third mounting groove 25 is open on the side facing the center of the cava seat 2, and the fourth mounting groove 110 is open on the side facing away from the center of the cava seat 2; a second spring 26 is also included, one end of the second spring 26 is connected to the inner side wall of the third mounting groove 25 away from the center of the cava seat 2, and the other end is connected to the inner side wall of the fourth mounting groove 110 close to the center of the cava seat 2, and the second spring 26 is in a stretched state.

[0038] In order to further ensure the timeliness of the outward movement of the cava 1 when the cone 3 moves relative to the cava 1, a second spring 26 is particularly provided on the limit groove 24 and the connecting part 11. The second spring 26 has the same function as the first spring 23, both of which make the cava 1 have a tendency to move radially outward, thereby making it easier for the cava 1 to move radially outward under the action of the cone 3.

[0039] At the same time, in order to avoid interference between the second spring 26 and the connecting part 11 and the side wall of the limiting groove 24, a third mounting groove 25 and a fourth mounting groove 110 are respectively arranged on the side wall of the limiting groove 24 and the connecting part 11 of the cava 1, so that the second spring 26 can be located between the third mounting groove 25 and the fourth mounting groove 110 to avoid interference.

[0040] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of this application.

Claims

1. A packer for preventing loss of airtightness, characterized in that: The invention comprises a slip (1) and a slip seat (2), wherein the slip (1) comprises a card joint (12) and a sliding head (10); a sliding groove (20) is provided on the slip seat (2); the sliding head (10) is arranged in the sliding groove (20) for radial sliding along the packer; and a sliding roller (21) is provided in the sliding groove (20).

2. The packer for preventing airtightness from being damaged according to claim 1, characterized in that: It also includes a first spring (23), one end of which is connected to the side wall of the sliding groove (20) and the other end of which is connected to the side wall of the sliding head (10) to drive the sliding head (10) to move back toward the center of the slip seat (2).

3. The packer for preventing airtightness from being damaged according to claim 2, characterized in that: A first mounting groove (22) is provided on both side walls of the sliding groove (20), and a second mounting groove (100) is correspondingly provided on both side walls of the sliding head (10), the first mounting groove (22) is open on one side facing the center of the cava seat (2), and the second mounting groove (100) is open on one side facing away from the center of the cava seat (2), one end of the first spring (23) is connected to the inner side wall of the first mounting groove (22) away from the center of the cava seat (2), and the other end is connected to the inner side wall of the second mounting groove (100) close to the center of the cava seat (2), and the first spring (23) is in a stretched state.

4. The packer for preventing airtightness from being damaged according to claim 3, characterized in that: The two opposite side walls of the sliding groove (20) are arranged obliquely, and the opening relatively located inside the slip seat (2) is larger than the opening inside.

5. The packer for preventing airtightness from being damaged according to claim 4, characterized in that: The number of the sliding rollers (21) is two, and the two sliding rollers (21) are arranged radially along the cava seat (2), and the height of one sliding roller (21) relatively close to the center of the cava seat (2) is higher than that of the other sliding roller (21); the bottom side wall of the sliding head (10) is inclined, and the side away from the center of the cava seat (2) is relatively low.

6. The packer for preventing airtightness from being damaged according to claim 5, characterized in that: A limiting groove (24) is provided on the end surface of the cava seat (2) facing the cava (1) corresponding to the sliding groove (20), and the limiting groove (24) is located above the sliding groove (20), and the width of the limiting groove (24) is smaller than the width of the sliding groove (20).

7. The packer for preventing airtightness from being damaged according to claim 6, characterized in that: A third mounting groove (25) is provided on the side wall of the limiting groove (24), and a fourth mounting groove (110) is correspondingly provided on the cava (1), wherein the third mounting groove (25) is opened on one side toward the center of the cava seat (2), and the fourth mounting groove (110) is opened on the side facing away from the center of the cava seat (2); and a second spring (26) is also included, wherein one end of the second spring (26) is connected to the inner side wall of the third mounting groove (25) away from the center of the cava seat (2), and the other end is connected to the inner side wall of the fourth mounting groove (110) close to the center of the cava seat (2), and the second spring (26) is in a stretched state.

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