Integral single-rubber-cylinder Y221 packer

Abstract

The utility model relates to the technical field of packers, in particular to an integral single-rubber-cylinder Y221 packer which comprises an upper connector, a central pipe and a lower connector, an inner boss is fixed on the inner side of the upper portion of a transposition body, and the bottom end of a clamping seat is arranged at the top end of the inner boss. A reversing sliding groove is formed in the transposition body in the circumferential direction, and a sliding block located in the reversing sliding groove is arranged on the outer side of the upper end of the upper connector. A plurality of integrated slip friction blocks are fixed to the outer side of the clamping base in the circumferential direction at intervals, a stroke is arranged between the bottom end of the cone and the top ends of the integrated slip friction blocks, and the inner sides of slips of the integrated slip friction blocks can be matched with the outer conical face of the cone. Compared with a conventional Y221 packer, the integrated slip friction block is higher in strength, and based on supporting of the integrated slip friction block designed integrally and the spiral spring, even if the rubber sleeve falls off and is clamped on the inner side of the slip, the integrated slip friction block is difficult to prize to fall off, so that the problem of clamping when a tubular column is lifted can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of packers and is an integral single-rubber-tube Y221 packer. Background Art

[0002] The Y221 packer is a common packer in the oil industry, often used as a completion tool. It can also be applied to tubing processes such as fracturing, water injection, gas injection, acidizing, and channeling detection. Currently, the commonly used Y221 packer is equipped with three rubber cartridges. This structure makes it very easy for the rubber cartridges and slips to fall out when the tubing is unsealed after the Y221 packer completes its operation, causing the tubing to become stuck. Summary of the Invention

[0003] The utility model provides an integral single-rubber-tube Y221 packer, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problem that the rubber tube and slips of the prior Y221 packer easily fall off when unsealing, causing the pipe string to get stuck.

[0004] The technical solution of the utility model is achieved through the following measures: an integral single-rubber-tube Y221 packer, comprising an upper joint, a central tube and a lower joint, wherein the inner side of the lower end of the upper joint is fixedly mounted on the outer side of the upper end of the central tube, the outer side of the lower end of the central tube is fixedly mounted on the inner side of the upper portion of the lower joint, an adjusting cap is fixedly connected to the outer side of the lower end of the upper joint, a cone is provided on the outer side of the central tube below the adjusting cap, and a rubber tube is provided on the outer side of the central tube between the adjusting cap and the cone; A card seat is mounted on the outer side of the lower part, and a transposition body is fixedly connected to the outer side of the lower end of the card seat. An inner boss is fixed on the inner side of the upper part of the transposition body, and the bottom end of the card seat is seated on the top of the inner boss. A reversing groove is provided in the circumferential direction of the transposition body, and a slider located in the reversing groove is provided on the outer side of the upper end of the upper joint. Several integrated slip friction blocks are fixed at circumferential intervals on the outer side of the card seat above the transposition body, and a stroke is provided between the bottom end of the cone and the top end of the integrated slip friction block, and the inner side of the slip of the integrated slip friction block can cooperate with the outer conical surface of the cone.

[0005] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0006] The above-mentioned integrated cava friction block includes a cava and a friction block. The bottom of the cava is connected to the top of the friction block as a whole. At least two radial spring grooves are arranged at intervals above and below the inner side of the friction block. A coil spring is fixedly installed between each radial spring groove and the outer side of the seat. A ring platform is provided at the upper end of the transposition body, and the bottom of the friction block is located inside the ring platform.

[0007] A clamp is fixedly installed on the outer side of the connection between the bottom of the slip and the top of the friction block; the number of the rubber sleeve is one.

[0008] The above-mentioned reversing chute is a conventional J-type reversing chute of the Y221 packer.

[0009] A sliding groove is provided on the inner side of the upper part of the above-mentioned cone, and a limiting groove is provided on the outer side of the center tube corresponding to the upper part of the sliding groove. A limiting ring is fixedly installed in the limiting groove, and the outer side of the limiting ring is located on the upper part of the sliding groove; a lower retaining ring is provided on the outer side of the center tube between the rubber cylinder and the cone, and a cone limiting groove is provided on the inner side of the lower part of the lower retaining ring. The upper end of the cone extends into the cone limiting groove, and the lower part of the lower retaining ring is fixedly connected to the upper end of the cone by a set screw.

[0010] The inner side of the lower end of the above-mentioned upper joint is fixed together with the outer side of the upper end of the center tube by threads, the outer side of the lower end of the center tube is fixed together with the inner side of the upper part of the lower joint by threads, the outer side of the lower end of the upper joint is fixedly connected with the adjustment cap by a tightening screw, and the outer side of the lower end of the holder is fixedly connected with the transposition body by a tightening screw.

[0011] At least one sealing ring is provided between the inner side of the lower end of the upper joint and the outer side of the upper end of the central tube; a retaining ring is provided between the rubber sleeve and the outer side of the central tube, and at least one sealing ring is provided between the inner side of the retaining ring and the outer side of the central tube.

[0012] Compared with the conventional Y221 packer, the integrated slip friction block of the utility model has higher strength. Based on the integral design of the integrated slip friction block and the support of the coil spring, even if the rubber tube falls off and gets stuck inside the slip, it is difficult to pry the integrated slip friction block to make it fall, thereby effectively preventing the problem of the pipe string getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 It is a schematic diagram of the main cross-sectional structure of the present utility model.

[0014] Attachment Figure 2 This is an enlarged structural diagram of the right side of the J-type reversing chute.

[0015] The codes in the accompanying drawings are: 1 for the upper joint, 2 for the center tube, 3 for the lower joint, 4 for the adjusting cap, 5 for the cone, 6 for the rubber cylinder, 7 for the holder, 8 for the transposition body, 9 for the inner boss, 10 for the reversing slide groove, 11 for the slider, 12 for the slips, 13 for the friction block, 14 for the radial spring groove, 15 for the coil spring, 16 for the ring table, 17 for the clamp, 18 for the sliding groove, 19 for the limit ring, 20 for the lower retaining ring, 21 for the cone limit groove, 22 for the sealing ring, 23 for the bearing ring, and 24 for the set screw. DETAILED DESCRIPTION

[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0017] In this utility model, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 The positional relationships of front, back, top, bottom, left, and right are described in the layout of the manual. Figure 1 The layout direction is determined by the

[0018] The present invention will be further described below in conjunction with the embodiments and accompanying drawings:

[0019] Example 1: As shown in the attached Figure 1 As shown, the integral single rubber tube Y221 packer includes an upper joint 1, a central tube 2 and a lower joint 3. The inner side of the lower end of the upper joint 1 is fixedly installed with the outer side of the upper end of the central tube 2, and the outer side of the lower end of the central tube 2 is fixedly installed with the upper inner side of the lower joint 3. The outer side of the lower end of the upper joint 1 is fixedly connected with an adjusting cap 4. A cone 5 is provided on the outer side of the central tube 2 below the adjusting cap 4. A rubber tube 6 is provided on the outer side of the central tube 2 between the adjusting cap and the cone 5. A clamping seat 7 is provided on the outer side of the lower part of the central tube 2. 7 The outer side of the lower end is fixedly connected to the transposition body 8, the inner side of the upper part of the transposition body 8 is fixed with an inner boss 9, and the bottom end of the holder 7 is seated on the top of the inner boss 9; the transposition body 8 is provided with a reversing slide 10 in the circumferential direction, and the outer side of the upper end of the upper joint 1 is provided with a slider 11 located in the reversing slide 10; a number of integrated slip friction blocks are fixed at intervals on the outer side of the holder 7 above the transposition body 8, and a stroke is provided between the bottom end of the cone 5 and the top of the integrated slip friction block, and the inner side of the slip 12 of the integrated slip friction block can cooperate with the outer conical surface of the cone 5.

[0020] The packer is designed to have the slips 12 and the friction blocks 13 as an integrated structure (i.e., an integrated slip friction block). Compared with the conventional Y221 packer, the integrated slip friction block has higher strength.

[0021] The above-mentioned integral single-tube Y221 packer can be further optimized and / or improved according to actual needs:

[0022] Example 2: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the integrated cava friction block includes a cava 12 and a friction block 13. The bottom of the cava 12 is connected to the top of the friction block 13 as a whole. At least two radial spring grooves 14 are arranged at intervals above and below the inner side of the friction block 13. A coil spring 15 is fixedly installed between each radial spring groove 14 and the outer side of the seat 7. A ring platform 16 is provided at the upper end of the transposition body 8, and the bottom of the friction block 13 is located in the ring platform 16.

[0023] This packer utilizes an integrated slip 12 and friction block 13 (i.e., an integrated slip friction block). Each integrated slip friction block is internally mounted with at least two sets of coil springs 15. Compared to the conventional Y221 packer, the integrated slip friction block offers greater strength. Furthermore, thanks to the integrated design of the integrated slip friction block and the support of the coil springs 15, even if the rubber cartridge 6 becomes lodged inside the slip 12, it is difficult to pry the integrated slip friction block free. This effectively prevents string jamming.

[0024] Example 3: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, a clamp 17 is fixedly installed on the outer side of the connection between the bottom of the slip 12 and the top of the friction block 13; the number of the rubber sleeve 6 is one.

[0025] This packer uses only one rubber cartridge 6 and has lower production costs compared to conventional Y221 packers.

[0026] like Figure 2 As shown, the reversing chute 10 is a conventional J-type reversing chute 10 of the Y221 packer.

[0027] Example 4: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, a sliding groove 18 is provided on the inner side of the upper part of the cone 5, and a limiting groove is provided on the outer side of the center tube 2 corresponding to the upper part of the sliding groove 18, and a limiting ring 19 is fixedly installed in the limiting groove, and the outer side of the limiting ring 19 is located at the upper part of the sliding groove 18; a lower retaining ring 20 is sleeved on the outer side of the center tube 2 between the rubber cylinder 6 and the cone 5, and a cone limiting groove 21 is provided on the inner side of the lower part of the lower retaining ring 20, and the upper end of the cone 5 extends into the cone limiting groove 21, and the lower part of the lower retaining ring 20 is fixedly connected to the upper end of the cone 5 by a set screw 24.

[0028] The distance between the limit ring 19 and the bottom of the sliding groove 18 serves as the upward stroke of the cone 5. After the slips 12 are opened and stuck on the inner wall of the casing, the pipe string is continued to be lowered to make the cone 5 move upward. The upward cone 5 compresses the rubber cylinder 6. After the compressed rubber cylinder 6 expands outward, it is sealed in the casing.

[0029] Example 5: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the inner side of the lower end of the upper joint 1 and the outer side of the upper end of the center tube 2 are fixed together by threads, the outer side of the lower end of the center tube 2 and the inner side of the upper part of the lower joint 3 are fixed together by threads, the outer side of the lower end of the upper joint 1 is fixedly connected to the adjustment cap 4 by a tightening screw 24, and the outer side of the lower end of the holder 7 is fixedly connected to the transposition body 8 by a tightening screw 24.

[0030] The set screw 24 can be a hexagonal cone-end set screw.

[0031] Example 6: As an optimization of the above embodiment, as needed, at least one sealing ring 22 is provided between the inner side of the lower end of the upper joint 1 and the outer side of the upper end of the center tube 2; a retaining ring 23 is provided between the rubber sleeve 6 and the outer side of the center tube 2, and at least one sealing ring 22 is provided between the inner side of the retaining ring 23 and the outer side of the center tube 2.

[0032] The above technical features respectively constitute various embodiments of the present invention, which have strong adaptability and better implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

[0033] The use process of the embodiment of the utility model:

[0034] (1) Connect the lower end of the pipe string to the upper connector 1 of the packer, and then slowly lower the entire pipe string into the well;

[0035] (2) Lower the packer to the expected sealing position;

[0036] (3) After the tubing is lifted, the slider 11 moves from point A of the J-shaped reversing slot 10 to point B. During the process of rotating the tubing 6 to 8 times, the slider 11 gradually slides out of the J-shaped reversing slot 10 from point B. The tubing is then lowered, and the cone 5 moves down to the inside of the slip 12 of the integrated slip friction block. When the outer conical surface of the cone 5 contacts the slip 12 of the integrated slip friction block, the slip 12 is spread open by the cone 5 as the tubing moves downward until the slip 12 is stuck on the inner wall of the casing. The tubing is then lowered further, causing the cone 5 to move upward. The upward cone 5 compresses the rubber cylinder 6. The compressed rubber cylinder 6 expands outward and is sealed in the casing.

[0037] (4) After the operation is completed, lift the tubing string to unseal the packer;

[0038] (5) Remove the packer from the wellbore and the construction is completed.

Claims

1. An integral single-tube Y221 packer, characterized by The lockhole that is formed on the upper part of the cylinder is formed, and the lockhole that is formed on the lower part of the cylinder is formed, and the lockhole engages with the upper and lower ends of the cylinder is fixed with the cylinder pressure bar.

2. The integral single-tube Y221 packer according to claim 1 is characterized in that The integrated slip friction block includes a slip and a friction block. The bottom of the slip is connected to the top of the friction block as a whole. At least two radial spring grooves are arranged at intervals above and below the inner side of the friction block. A coil spring is fixedly installed between each radial spring groove and the outer side of the seat. A ring platform is provided at the upper end of the transposition body, and the bottom of the friction block is located inside the ring platform.

3. The integral single-tube Y221 packer according to claim 1 or 2, characterized in that A clamp is fixedly installed on the outer side of the connection between the bottom of the slip and the top of the friction block; or / and, the number of the rubber sleeve is one; or / and, the reversing slide is a conventional J-type reversing slide of the Y221 packer.

4. The integral single-tube Y221 packer according to claim 1 or 2, characterized in that A sliding groove is provided on the inner side of the upper part of the cone, and a limiting groove is provided on the outer side of the center tube corresponding to the upper part of the sliding groove. A limiting ring is fixedly installed in the limiting groove, and the outer side of the limiting ring is located on the upper part of the sliding groove; a lower retaining ring is provided on the outer side of the center tube between the rubber cylinder and the cone, and a cone limiting groove is provided on the inner side of the lower part of the lower retaining ring. The upper end of the cone extends into the cone limiting groove, and the lower part of the lower retaining ring is fixedly connected to the upper end of the cone by a set screw.

5. The integral single-tube Y221 packer according to claim 3 is characterized in that A sliding groove is provided on the inner side of the upper part of the cone, and a limiting groove is provided on the outer side of the center tube corresponding to the upper part of the sliding groove. A limiting ring is fixedly installed in the limiting groove, and the outer side of the limiting ring is located on the upper part of the sliding groove; a lower retaining ring is provided on the outer side of the center tube between the rubber cylinder and the cone, and a cone limiting groove is provided on the inner side of the lower part of the lower retaining ring. The upper end of the cone extends into the cone limiting groove, and the lower part of the lower retaining ring is fixedly connected to the upper end of the cone by a set screw.

6. The integral single-tube Y221 packer according to claim 1, 2 or 5, characterized in that The inner side of the lower end of the upper joint and the outer side of the upper end of the center tube are fixed together by threads, the outer side of the lower end of the center tube and the inner side of the upper part of the lower joint are fixed together by threads, the outer side of the lower end of the upper joint is fixedly connected with an adjustment cap by a set screw, and the outer side of the lower end of the clamping seat is fixedly connected with a transposition body by a set screw.

7. The integral single-tube Y221 packer according to claim 3 is characterized in that The inner side of the lower end of the upper joint and the outer side of the upper end of the center tube are fixed together by threads, the outer side of the lower end of the center tube and the inner side of the upper part of the lower joint are fixed together by threads, the outer side of the lower end of the upper joint is fixedly connected with an adjustment cap by a set screw, and the outer side of the lower end of the clamping seat is fixedly connected with a transposition body by a set screw.

8. The integral single-tube Y221 packer according to claim 4 is characterized in that The inner side of the lower end of the upper joint and the outer side of the upper end of the center tube are fixed together by threads, the outer side of the lower end of the center tube and the inner side of the upper part of the lower joint are fixed together by threads, the outer side of the lower end of the upper joint is fixedly connected with an adjustment cap by a set screw, and the outer side of the lower end of the clamping seat is fixedly connected with a transposition body by a set screw.

9. The integral single-tube Y221 packer according to claim 1, 2, 5, 7 or 8, characterized in that At least one sealing ring is provided between the inner side of the lower end of the upper joint and the outer side of the upper end of the central tube; a retaining ring is provided between the rubber sleeve and the outer side of the central tube, and at least one sealing ring is provided between the inner side of the retaining ring and the outer side of the central tube.

10. The integral single-tube Y221 packer according to claim 6 is characterized in that At least one sealing ring is provided between the inner side of the lower end of the upper joint and the outer side of the upper end of the central tube; a retaining ring is provided between the rubber sleeve and the outer side of the central tube, and at least one sealing ring is provided between the inner side of the retaining ring and the outer side of the central tube.

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