Well repair packer for oil exploitation

Abstract

The utility model discloses a workover packer for oil exploitation, which comprises a pipe body, the top end and the bottom end of the pipe body are respectively provided with an upper joint and a connecting sleeve, the bottom end of the connecting sleeve is provided with a lower joint, the outer wall of the pipe body is provided with a rubber sleeve, the outer wall of the pipe body is sleeved with two lantern rings, and the two lantern rings are respectively connected with the upper joint and the connecting sleeve. A plurality of first threaded holes are formed in the side wall of the lantern ring, the first threaded holes are formed in an annular array mode with the lantern ring as the center, inner cavities of the first threaded holes are in threaded connection with fixing cylinders, springs are arranged in inner cavities of the fixing cylinders, inner rods are arranged at one ends of the springs and inserted into the inner cavities of the fixing cylinders, and the outer ends of the inner rods are provided with second threaded holes. And a ball is arranged at the exposed end of the inner rod. The utility model relates to the technical field of oil exploitation, the packer is provided with a plurality of fixing cylinders in the lantern ring, under the action of the spring, the inner rod and the ball can be ejected outwards, so that when the whole packer enters a well, the center position of the packer in the well can be stabilized through the elasticity of the spring and the rolling of the ball, and the packer is convenient to use. And the phenomenon that the packer shakes is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of oil extraction, specifically a well workover packer used in oil extraction. Background Technology

[0002] A packer is a downhole tool primarily used to connect to the downhole tubing string of an oil and gas well to seal the annular space between the tubing and the well casing or open hole wall. Its main function is to isolate the annular space above and below the packer, preventing interference and cross-flow between different fluids. According to Chinese Patent Publication No. CN219548835U, which describes a packer, a frame is fitted onto the outer parts of the upper and lower tubing bodies, with connecting frames at both ends. Rollers are fitted onto the inner parts of these connecting frames, providing stable support as the packer enters the well. However, due to the cylindrical shape of the well, the relatively long rollers struggle to fully contact the well wall, resulting in poor stability. Therefore, we provide a well workover packer for oil extraction to address these issues. Utility Model Content

[0003] To address the aforementioned problems, specifically those raised in the background section, this utility model proposes a well workover packer for oil extraction, comprising a pipe body. An upper connector and a connecting sleeve are respectively provided at the top and bottom of the pipe body. A lower connector is provided at the bottom of the connecting sleeve. A rubber sleeve is provided on the outer wall of the pipe body. Two collars are fitted onto the outer wall of the pipe body. Several threaded holes are formed on the side walls of the collars, arranged in a circular array around the collars. A fixed cylinder is threaded into the inner cavity of each threaded hole. A spring is provided within the inner cavity of the fixed cylinder. An inner rod is provided at one end of the spring and inserted into the inner cavity of the fixed cylinder. A ball bearing is provided at the exposed end of the inner rod.

[0004] Preferably, a fixing block is embedded and fixedly provided on the side wall of the fixing cylinder, and a sliding groove is provided on the outer wall of the inner rod corresponding to the fixing block, and the fixing block is slidably connected to the inner cavity of the sliding groove.

[0005] Preferably, the tube body has a groove on the outer wall corresponding to the fixed cylinder, and the fixed cylinder can be embedded in the inner cavity of the groove.

[0006] Preferably, the outer wall of the collar has a plurality of threaded holes II, which are arranged in a ring array around the collar. Bolts are threaded inside the threaded holes II, and one end of the bolts can press against the outer wall of the tube.

[0007] Preferably, a limiting block is fixedly provided at the threaded end of the bolt, and a limiting groove is opened on the outer wall of the pipe body corresponding to the limiting block, with the limiting block abutting against the inner cavity of the corresponding limiting groove.

[0008] The beneficial technical effects of this utility model are as follows: By setting multiple fixed cylinders inside the collar, the inner rod and ball can be pushed outward under the action of springs. Thus, when the packer enters the well, the elasticity of the springs and the rolling of the balls can stabilize the packer in the center position in the well, and prevent the packer from shaking. Attached Figure Description

[0009] Figure 1 A schematic diagram of the front view structure of this utility model is shown.

[0010] Figure 2 The diagram shows a top sectional view of the tube body and collar of this invention.

[0011] Figure 3 This utility model is shown Figure 2 Enlarged view of the structure at point A.

[0012] Attached diagram: 1. Pipe body; 2. Upper connector; 3. Rubber tube; 4. Connecting sleeve; 5. Lower connector; 6. Collar; 7. Threaded hole one; 8. Fixed cylinder; 9. Spring; 10. Inner rod; 11. Ball bearing; 12. Fixed block; 13. Slide groove; 14. Groove; 15. Threaded hole two; 16. Bolt; 17. Limiting block; 18. Limiting groove. Detailed Implementation

[0013] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0014] This utility model proposes a well workover packer for oil extraction, comprising a pipe body 1, with an upper connector 2 and a connecting sleeve 4 respectively provided at the top and bottom ends of the pipe body 1, and a lower connector 5 provided at the bottom end of the connecting sleeve 4. A rubber sleeve 3 is provided on the outer wall of the pipe body 1. The packer uses high-pressure liquid to act on the inner cavity of the rubber sleeve 3, causing the rubber sleeve 3 to expand and seal the oil sleeve ring 6. When the oil pressure is released, the rubber sleeve 3 retracts back to its original shape by its own elastic force, thus releasing the seal. Two sleeve rings 6 are fitted on the outer wall of the pipe body 1, and the side walls of the sleeve rings 6 have several threaded holes 7. The several threaded holes 7 are used to... The collar 6 is arranged in a ring array around the center. The inner cavity of the threaded hole 7 is threadedly connected to the fixed cylinder 8. The inner cavity of the fixed cylinder 8 is equipped with a spring 9. One end of the spring 9 is equipped with an inner rod 10, which is inserted into the inner cavity of the fixed cylinder 8. The outer end of the inner rod 10 is equipped with a ball 11. In actual use, there are 6 threaded holes 7. Under the action of the spring 9, the inner rod 10 and the ball 11 can be pushed outward, so that when the packer enters the well, the elasticity of the spring 9 and the rolling of the ball 11 can stabilize the packer in the center position in the well.

[0015] Specifically, a fixing block 12 is embedded in the side wall of the fixing cylinder 8, and a sliding groove 13 is provided on the outer wall of the inner rod 10 corresponding to the fixing block 12. The fixing block 12 is slidably connected to the inner cavity of the sliding groove 13. Through the design of the fixing block 12 and the sliding groove 13, the stability of the movement of the inner rod 10 can be guaranteed.

[0016] Specifically, the tube body 1 has a groove 14 on the outer wall corresponding to the fixed cylinder 8. The fixed cylinder 8 can be embedded in the inner cavity of the groove 14. The purpose of this design is to further increase the length of the fixed cylinder 8, thereby increasing the activity space of the inner rod 10.

[0017] Specifically, the outer wall of the collar 6 has several threaded holes 15, which are arranged in a circular array around the collar 6. Bolts 16 are threaded inside the threaded holes 15. One end of the bolts 16 can be pressed against the outer wall of the tube body 1. A limit block 17 is fixedly installed at the threaded end of the bolts 16. A limit groove 18 is opened on the outer wall of the tube body 1 corresponding to the limit block 17. The limit block 17 is pressed against the inner cavity of the corresponding limit groove 18. The collar 6 can be fixed to the tube body 1 by the bolts 16. When the limit block 17 is pressed against the limit groove 18, the collar 6 can be stably fixed to prevent the collar 6 from rotating or shifting.

[0018] For those skilled in the art, all electrical components and parts in this case are general standard parts or parts known to those skilled in the art. Their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods. All models are compatible with this solution and can operate normally. All electrical components in this case are connected to their compatible power supplies through wires. According to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence should refer to the working principle below, and the electrical connection is completed by the sequential operation of each electrical component. The detailed connection method is a well-known technology in the art, and the electrical control will not be described further.

[0019] Working principle: When using this packer, the operator first puts the collar 6 on the outer wall of the pipe body 1 and screws the bolt 16 into the inner cavity of the threaded hole 15 until the limiting block 17 abuts against the limiting groove 18. At this time, the collar 6 is fixed to the outer wall of the pipe body 1. Then, the fixing cylinder 8 can be screwed into the inner cavity of the threaded hole 7 until one end of the fixing cylinder 8 is completely in contact with the groove 14. After installation, the operator can place one end of the lower connector 5 into the well and slide the packer down into the well. At this time, under the action of the spring 9, the inner rod 10 can be pushed outward, so that the ball 11 at the outer end of the inner rod 10 contacts the well wall. Under the action of multiple balls 11, the packer can be stably slid into the well, replacing the original roller contact method. This allows the balls 11 to be completely in contact with the well wall, making it more convenient to use and easier to disassemble.

[0020] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0021] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0024] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A well workover packer for oil extraction, comprising a pipe body (1), wherein an upper connector (2) and a connecting sleeve (4) are respectively provided at the top and bottom ends of the pipe body (1), a lower connector (5) is provided at the bottom end of the connecting sleeve (4), and a rubber sleeve (3) is provided on the outer wall of the pipe body (1), characterized in that: The outer wall of the tube body (1) is fitted with two collars (6). The side wall of the collars (6) is provided with several threaded holes (7). The several threaded holes (7) are arranged in a ring array with the collars (6) as the center. The inner cavity of the threaded hole (7) is threadedly connected to a fixed cylinder (8). The inner cavity of the fixed cylinder (8) is provided with a spring (9). One end of the spring (9) is provided with an inner rod (10). The inner rod (10) is inserted into the inner cavity of the fixed cylinder (8). The outer end of the inner rod (10) is provided with a ball (11).

2. A well workover packer for oil extraction according to claim 1, characterized in that: A fixing block (12) is embedded in the side wall of the fixing cylinder (8). The inner rod (10) has a groove (13) on the outer wall of the fixing block (12). The fixing block (12) is slidably connected to the inner cavity of the groove (13).

3. A well workover packer for oil extraction according to claim 1, characterized in that: The tube body (1) has a groove (14) on the outer wall corresponding to the fixed cylinder (8), and the fixed cylinder (8) can be embedded in the inner cavity of the groove (14).

4. A well workover packer for oil extraction according to claim 1, characterized in that: The outer wall of the collar (6) is provided with a plurality of threaded holes (15), and the plurality of threaded holes (15) are arranged in a ring array with the collar (6) as the center. The internal threads of the threaded holes (15) are connected to bolts (16), and one end of the bolts (16) can press against the outer wall of the tube body (1).

5. A well workover packer for oil extraction according to claim 4, characterized in that: The threaded end of the bolt (16) is fixedly provided with a limiting block (17), and the outer wall of the pipe body (1) corresponding to the limiting block (17) is provided with a limiting groove (18), and the limiting block (17) abuts against the inner cavity of the corresponding limiting groove (18).

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