Anti-blocking packer for half-way well cementation

Abstract

The utility model discloses an anti-blocking packer for half-way well cementation, and relates to the technical field of fixed buildings. An anti-blocking packer for half-stroke well cementation comprises an upper connector, a limiting device is arranged on the upper connector and comprises a rotating sleeve, a square block and four limiting blocks, a rotating column is rotationally connected to the upper end of the interior of the upper connector, the square block is fixedly connected to the lower end of the rotating column, a coil spring groove is formed in the upper connector, and the limiting blocks are arranged in the coil spring groove. A rotating sleeve is screwed to rotate to drive a limiting rod to rotate around a rotating column and drive the rotating column to rotate at the same time, then the rotating column rotates to drive a coil spring to contract and drive a limiting block to move oppositely, then the limiting block moves oppositely and is separated from the interior of a first limiting block groove, and then a connecting pipe can be taken down from an upper connector. In this way, workers can maintain the packer conveniently, meanwhile, the situation that the workers need to disassemble the packer with the help of tools is avoided, the maintenance cost is effectively reduced, and meanwhile the working efficiency of the workers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixed buildings, in particular to an anti-stuck half-way cementing packer. Background Art

[0002] The packer is the core component of the downhole pipe string and plays an extremely important role in the oil production process. With the development of the oil industry, the packer has also been continuously developed. Thermal oil production technology first appeared in the 1920s and was promoted and applied in some famous heavy oil fields in the world in the 1960s. This has led to the continuous development of drilling and completion technology towards high pressure, high temperature and complex deep formations. Ordinary packers are not competent, so various higher requirements are put forward for the performance of packers.

[0003] The connection between the existing packer upper joint and the pipeline is connected by welding, so that the metal parts of two or more components are fused together to form a whole. However, when the packer needs to be repaired or the packer parts need to be replaced, more time and tools may be required to disassemble and reinstall, which increases the difficulty and cost of maintenance and reduces the work efficiency of the staff. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a half-way cementing packer for preventing sticking, which can solve the problem that when repairing or replacing the packer parts, more time and tools may be required to disassemble and reinstall, thereby increasing the difficulty and cost of maintenance.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a packer for anti-sticking half-way cementing, comprising an upper joint, on which a limiting device is arranged;

[0006] The limiting device includes a rotating sleeve, a block and four limiting blocks;

[0007] Wherein, the inner upper end of the upper joint is rotatably connected with a rotating column;

[0008] Wherein, the block is fixedly connected at the lower end of the rotating column;

[0009] Wherein, a coil spring groove is provided inside the upper joint;

[0010] Wherein, a coil spring is arranged inside the coil spring groove;

[0011] Wherein, the two ends of the coil spring are fixedly connected to the outer wall of the corresponding rotating column and the inner wall of the coil spring groove respectively;

[0012] Among them, four second limit block grooves are opened on the outer wall of the lower end of the upper joint;

[0013] The four limit blocks are respectively slidably connected inside the corresponding second limit block grooves;

[0014] Wherein, a limit rod groove is provided on the outer wall of the upper joint;

[0015] Among them, the limit rod groove is in an "arc" shape;

[0016] Among them, one end of the four limit blocks close to the block is rotatably connected to the four corners of the block respectively;

[0017] Wherein, the inner part of the limit rod groove is slidably connected to the limit rod;

[0018] Wherein, one end of the limiting rod close to the rotating column is fixedly connected to the outer wall of the rotating column;

[0019] Wherein, the outer wall of the upper joint is provided with a rotating sleeve groove;

[0020] Wherein, the interior of the rotating sleeve groove is rotatably connected with a rotating sleeve;

[0021] Wherein, one end of the limiting rod close to the rotating sleeve is fixedly connected to the inner wall of the rotating sleeve;

[0022] Wherein, a connecting pipe is arranged below the upper joint;

[0023] Among them, four first limit block grooves are opened on the inner wall of one end of the connecting pipe close to the upper joint;

[0024] Wherein, one end of the upper joint close to the connecting pipe is slidably connected to the inner wall of the connecting pipe;

[0025] Among them, one end of the four limiting blocks close to the first limiting block groove is respectively in contact with the inner wall of the corresponding first limiting block groove.

[0026] Preferably, an elastic block is installed on the outer wall of the connecting pipe.

[0027] Preferably, a threaded groove is provided at the lower end of the connecting pipe.

[0028] Preferably, the internal thread of the thread groove is connected with a threaded connector.

[0029] Preferably, one end of the threaded connector away from the upper connector is fixedly connected to a lower connector.

[0030] Preferably, a resistance groove is provided on the outer wall of the lower joint.

[0031] Compared with the prior art, the beneficial effects of the utility model are:

[0032] (1) The anti-stuck half-stroke cementing seal drives the limit rod to rotate around the rotating column by twisting the rotating sleeve, and drives the rotating column to rotate at the same time. Then, the rotating column rotates to drive the coil spring to contract and drives the limit block to move in the opposite direction. Then, the limit block moves in the opposite direction and disengages from the inside of the first limit block groove. Then, the connecting pipe can be removed from the upper joint, which makes it easy for the staff to repair the seal and avoids the need for the staff to disassemble it with the help of tools, effectively reducing the maintenance cost and improving the work efficiency of the staff.

[0033] (2) The anti-stuck mid-stroke cementing seal is made of wear-resistant and corrosion-resistant materials through the elastic block on the outer wall of the connecting pipe, which can reduce the friction between the equipment and the well wall and reduce wear. At the same time, it effectively reduces the risk of the equipment getting stuck in the well. Then the elastic block helps to increase the stability of the seal in the wellbore by providing additional support and fixing force, preventing the seal from moving or deviating during the cementing process, thereby greatly improving the stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0035] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0036] Figure 2 This is a schematic diagram of the external structure of the threaded connector of the utility model;

[0037] Figure 3 This is a schematic diagram of the structure inside the connecting pipe of the utility model;

[0038] Figure 4 It is a schematic diagram of the structure of the outer part of the rotating sleeve of the utility model;

[0039] Figure 5 It is a schematic diagram of the structure inside the upper joint of the utility model.

[0040] Figure markings: 1. upper joint; 2. rotating sleeve; 3. limiting rod; 4. resistance groove; 5. lower joint; 6. elastic block; 7. connecting pipe; 8. threaded groove; 9. threaded connector; 10. limiting block; 11. first limiting block groove; 12. second limiting block groove; 13. rotating sleeve groove; 14. rotating column; 15. coil spring; 16. block; 17. limiting rod groove; 18. coil spring groove. DETAILED DESCRIPTION

[0041] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0042] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0044] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0045] See also Figure 1-5 , the utility model provides a technical solution: a packer for anti-sticking half-way cementing, comprising an upper joint 1;

[0046] A limiting device is provided on the upper joint 1;

[0047] The limiting device includes a rotating sleeve 2, a block 16 and four limiting blocks 10. The upper end of the upper joint 1 is rotatably connected to a rotating column 14. The block 16 is fixedly connected to the lower end of the rotating column 14. A coil spring groove 18 is provided inside the upper joint 1. A coil spring 15 is provided inside the coil spring groove 18. The two ends of the coil spring 15 are respectively fixedly connected to the outer wall of the corresponding rotating column 14 and the inner wall of the coil spring groove 18. Four second limiting block grooves 12 are provided on the outer wall of the lower end of the upper joint 1. The four limiting blocks 10 are respectively slidably connected inside the corresponding second limiting block grooves 12. A limiting rod groove 17 is provided on the outer wall of the upper joint 1. The limiting rod groove 17 is in an "arc" shape. One end of the four limiting blocks 10 close to the block 16 is respectively fixed to the square The four corners of block 16 are rotatably connected, and the limiting rod 3 is slidably connected inside the limiting rod groove 17. The end of the limiting rod 3 close to the rotating column 14 is fixedly connected to the outer wall of the rotating column 14. A rotating sleeve groove 13 is provided on the outer wall of the upper joint 1. The rotating sleeve groove 13 is rotatably connected inside with a rotating sleeve 2. The end of the limiting rod 3 close to the rotating sleeve 2 is fixedly connected to the inner wall of the rotating sleeve 2. A connecting pipe 7 is provided below the upper joint 1. Four first limiting block grooves 11 are provided on the inner wall of one end of the connecting pipe 7 close to the upper joint 1. One end of the upper joint 1 close to the connecting pipe 7 is slidably connected to the inner wall of the connecting pipe 7. One end of the four limiting blocks 10 close to the first limiting block grooves 11 respectively contacts the inner walls of the corresponding first limiting block grooves 11.

[0048] Among them, an elastic block 6 is installed on the outer wall of the connecting pipe 7, a threaded groove 8 is opened at the lower end of the connecting pipe 7, the internal thread of the threaded groove 8 is connected to a threaded connector 9, the end of the threaded connector 9 away from the upper connector 1 is fixedly connected to the lower connector 5, and a groove resistance groove 4 is opened on the outer wall of the lower connector 5.

[0049] Furthermore, when using the device, it is started by connecting an external power supply. First, after the upper connector 1 and the lower connector 5 are connected to the external equipment, the elastic block 6 on the outer wall of the connecting pipe 7 is made of wear-resistant and corrosion-resistant material, which can reduce the friction between the equipment and the well wall and reduce wear, while effectively reducing the risk of the equipment getting stuck in the well.

[0050] Furthermore, when the connecting pipe 7 needs to be removed, the rotating sleeve 2 is twisted to rotate and drive the limit rod 3 to rotate around the rotating column 14 while driving the rotating column 14 to rotate. Then, the rotating column 14 rotates to drive the coil spring to contract while driving the limit block 10 to move in the opposite direction. Then, the limit block 10 moves in the opposite direction and disengages from the inside of the first limit block groove 11. Then, the connecting pipe 7 can be removed from the upper joint 1.

[0051] By twisting the rotating sleeve 2, the limiting rod 3 is driven to rotate around the rotating column 14 and the rotating column 14 is driven to rotate. Then, the rotating column 14 rotates to drive the coil spring to contract and drive the limiting block 10 to move in the opposite direction. Then, the limiting block 10 moves in the opposite direction and disengages from the inside of the first limiting block groove 11. Then, the connecting pipe 7 can be removed from the upper joint 1, which is convenient for the staff to repair the sealer and avoids the need for the staff to use tools to disassemble it, effectively reducing the maintenance cost and improving the work efficiency of the staff. The elastic block 6 on the outer wall of the connecting pipe 7 is made of wear-resistant and corrosion-resistant material, which can reduce the friction between the equipment and the well wall, reduce wear, and effectively reduce the equipment from getting stuck in the well. Then, the elastic block 6 helps to increase the stability of the sealer in the wellbore by providing additional support and fixing force, preventing the sealer from moving or deviating during cementing, thereby greatly improving the stability of the equipment.

[0052] Working principle: First, after the upper joint 1 and the lower joint 5 are connected to the external equipment, the elastic block 6 on the outer wall of the connecting pipe 7 is made of wear-resistant and corrosion-resistant materials, which can reduce the friction between the equipment and the well wall and reduce wear. At the same time, it effectively reduces the equipment from getting stuck in the well. Then, when the connecting pipe 7 needs to be removed, the rotating sleeve 2 is twisted to rotate and drive the limit rod 3 to rotate around the rotating column 14 while driving the rotating column 14 to rotate. Then, the rotating column 14 rotates to drive the coil spring to contract while driving the limit block 10 to move in the opposite direction. Then, the limit block 10 moves in the opposite direction and disengages from the inside of the first limit block groove 11. Then, the connecting pipe 7 can be removed from the upper joint 1.

[0053] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A packer for preventing sticking in the middle of cementing, comprising an upper joint (1), characterized in that: A limiting device is provided on the upper joint (1); The limiting device comprises a rotating sleeve (2), a block (16) and four limiting blocks (10); The upper end of the upper joint (1) is rotatably connected to a rotating column (14); Wherein, the block (16) is fixedly connected to the lower end of the rotating column (14); Wherein, a coil spring groove (18) is provided inside the upper joint (1); Wherein, a coil spring (15) is arranged inside the coil spring groove (18); Wherein, the two ends of the coil spring (15) are respectively fixedly connected to the outer wall of the corresponding rotating column (14) and the inner wall of the coil spring groove (18); Wherein, four second limit block grooves (12) are provided on the outer wall of the lower end of the upper joint (1); The four limit blocks (10) are respectively slidably connected inside the corresponding second limit block grooves (12); Wherein, a limit rod groove (17) is provided on the outer wall of the upper joint (1); Wherein, the limit rod groove (17) is in an arc shape; Wherein, one end of the four limit blocks (10) close to the block (16) is rotatably connected to the four corners of the block (16) respectively; The limiting rod (3) is slidably connected inside the limiting rod groove (17); Wherein, one end of the limiting rod (3) close to the rotating column (14) is fixedly connected to the outer wall of the rotating column (14); Wherein, a rotating sleeve groove (13) is provided on the outer wall of the upper joint (1); The rotating sleeve (2) is rotatably connected inside the rotating sleeve groove (13); Wherein, one end of the limiting rod (3) close to the rotating sleeve (2) is fixedly connected to the inner wall of the rotating sleeve (2); Wherein, a connecting pipe (7) is arranged below the upper joint (1); Wherein, four first limit block grooves (11) are formed on the inner wall of one end of the connecting pipe (7) close to the upper joint (1); Wherein, one end of the upper joint (1) close to the connecting pipe (7) is slidably connected to the inner wall of the connecting pipe (7); Wherein, one end of the four limit blocks (10) close to the first limit block groove (11) is in contact with the inner wall of the corresponding first limit block groove (11) respectively.

2. The anti-sticking half-way cementing packer according to claim 1, characterized in that: An elastic block (6) is installed on the outer wall of the connecting pipe (7).

3. The anti-sticking half-way cementing packer according to claim 1, characterized in that: A thread groove (8) is formed at the lower end of the connecting pipe (7).

4. The anti-sticking half-way cementing packer according to claim 3, characterized in that: The internal thread of the thread groove (8) is connected with a threaded connector (9).

5. The anti-sticking half-way cementing packer according to claim 4, characterized in that: One end of the threaded connector (9) away from the upper connector (1) is fixedly connected to the lower connector (5).

6. The anti-sticking half-way cementing packer according to claim 5, characterized in that: The outer wall of the lower joint (5) is provided with a groove resistance groove (4).

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