Underground hydraulic locking device

Abstract

The utility model discloses an underground hydraulic locking device which comprises a fixing sleeve, an oil pumping pipe, an L-shaped rod, a limiting block, a moving ring, a fixing ring, a connecting rod, a fixing block, a connecting block, a sliding block, a V-shaped groove, a spring, a supporting assembly and a recycling assembly. The utility model belongs to the technical field of oil well operation, particularly relates to an underground hydraulic locking device, and solves the problems that when an oil pipe is broken, due to the poor clamping effect of a locking device, the oil pipe with a sleeve slides down and falls into the bottom of a well, the sleeve clamped by hydraulic control of the oil pipe is difficult to recycle, the subsequent oil pumping process is affected, and the oil pumping efficiency is affected. And the oil pumping efficiency is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of oil well operation technology, specifically referring to a hydraulic locking device for downhole applications. Background Technology

[0002] A hydraulic locking device is a well control device commonly used to hydraulically control and clamp the tubing casing to prevent tubing creep.

[0003] However, when the tubing breaks, the locking device only uses an anti-slip sleeve, resulting in poor clamping effect. This can cause the tubing and casing to slide down to the bottom of the well. The hydraulic control of the tubing to clamp the casing is difficult to recover, which affects the subsequent oil pumping process and reduces the oil pumping efficiency. Therefore, there is an urgent need for a hydraulic locking device for downhole to solve the above problems. Utility Model Content

[0004] The technical problem this utility model aims to solve is that when an oil pipe breaks, due to the poor clamping effect of the locking device, the oil pipe and casing may slide down to the bottom of the well. The hydraulic control of the oil pipe and the casing are difficult to recover, which affects the subsequent oil pumping process and reduces the oil pumping efficiency.

[0005] To achieve the above functions, the technical solution adopted by this utility model is as follows: a hydraulic locking device for downhole, including a sucker pipe and a fixing sleeve sleeved on the outer wall of the sucker pipe, wherein a support component is provided on the outer wall of the fixing sleeve and a recovery component is provided on the outer wall of the sucker pipe;

[0006] The support assembly includes a fixed ring fixed on the outer wall of the fixed sleeve, and a movable ring located above the fixed ring and slidably connected to the fixed sleeve. The outer walls of the movable ring and the fixed ring are also provided with a limiting mechanism to prevent the sucker tube from falling.

[0007] The recovery component includes an L-shaped rods arranged in a ring array on the outer wall of the sucker tube, and a connecting block arranged in a ring array on the outer wall of the moving ring for limiting the ends of the L-shaped rods.

[0008] Furthermore, the limiting mechanism also includes multiple connecting rods that are rotatably disposed on the outer walls of the moving ring and the fixed ring, and a fixed block is rotatably connected between every two connecting rods.

[0009] Furthermore, a trapezoidal cutout is provided on one side wall of the fixing block.

[0010] Furthermore, the recycling component also includes a slider that is slidably disposed on the upper end of the connecting block, and rectangular cutouts are provided on both sides of the slider. A spring is fixedly connected to the cutout, and the other end of the spring is fixedly connected to the connecting block. A V-groove is provided between the connecting block and the slider, and a limiting block adapted to the V-groove is fixedly disposed at the end of the L-shaped rod.

[0011] Furthermore, a gap is provided between the two sliders for the lower end of the limiting block to pass through, and the two sides of the limiting block are arranged in a triangular shape.

[0012] Furthermore, when the oil extraction pipe is working normally, the limiting block at the end of the L-shaped rod on it does not directly contact the slider.

[0013] The beneficial effects of this utility model by adopting the above structure are as follows:

[0014] 1. A support assembly is provided. The L-shaped rod on the sucker pipe moves downward, contacts the connecting block and pushes it downward. The connecting rod connected to the fixed ring and the moving ring at the fixed sleeve unfolds in an umbrella-shaped structure, and the fixed block connected to the end of the connecting rod abuts against the inner wall of the wellhead to prevent it from sliding down.

[0015] 2. A recovery assembly is provided. When the limiting block at the end of the L-shaped rod moves downward, it pushes the two sliders apart and they enter the V-shaped groove to be restricted. During recovery, the oil suction pipe is pulled, and the L-shaped rod and connecting block pull the moving ring upward, releasing the support of the fixed sleeve and facilitating subsequent recovery. Attached Figure Description

[0016] Figure 1 This solution presents a schematic diagram of the structure of a hydraulic locking device for downhole applications. Figure 1 ;

[0017] Figure 2 This solution presents a schematic diagram of the structure of a hydraulic locking device for downhole applications. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the support component in this embodiment;

[0019] Figure 4 This is an example. Figure 3 An enlarged view of part A in the image.

[0020] The components are: 1. Fixed sleeve; 2. Oil suction pipe; 3. L-shaped rod; 4. Limiting block; 5. Moving ring; 6. Fixed ring; 7. Connecting rod; 8. Fixed block; 9. Connecting block; 10. Slider; 11. V-groove; 12. Spring.

[0021] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] refer to Figure 1 As shown, in order to achieve the above functions, the technical solution adopted by this utility model is as follows: a hydraulic locking device for downhole, including a sucker pipe 2 and a fixing sleeve 1 sleeved on the outer wall of the sucker pipe 2, a support component is provided on the outer wall of the fixing sleeve 1, and a recovery component is provided on the outer wall of the sucker pipe 2.

[0025] like Figure 1-4 As shown, the support assembly includes a fixed ring 6 fixed on the outer wall of the fixed sleeve 1, and a movable ring 5 located above the fixed ring 6 and slidably connected to the fixed sleeve 1. The outer walls of the movable ring 5 and the fixed ring 6 are also provided with limiting mechanisms to prevent the sucker tube 2 from falling. The recovery mechanism includes L-shaped rods 3 arranged in a ring array on the outer wall of the sucker tube 2, and connecting blocks 9 arranged in a ring array on the outer wall of the movable ring 5 to limit the ends of the L-shaped rods 3.

[0026] like Figure 2 and 3 As shown, the limiting mechanism also includes multiple connecting rods 7 rotatably mounted on the outer walls of the moving ring 5 and the fixed ring 6, and a fixing block 8 is rotatably connected between every two connecting rods 7. A trapezoidal hollow is provided on one side wall of the fixing block 8, which has a better fixing and limiting effect. When the L-shaped rod 3 falls, it pushes the connecting block 9 on the moving ring 5 downward, so that the upper and lower connecting rods 7 unfold and push the fixing block 8 at the end to abut against the inner wall of the wellhead. As the depth of the L-shaped rod 3 falls increases, the supporting force gradually increases, so as to prevent slippage.

[0027] Example 2:

[0028] Based on Example 1, why is it possible to achieve the purpose of recovering the fixed sleeve when the sucker pipe breaks, such as... Figure 1-4As shown, the recovery mechanism also includes a slider 10 that slides on the upper end of the connecting block 9. The slider 10 has rectangular openings on both sides, and a spring 12 is fixedly connected to the opening. The other end of the spring 12 is fixedly connected to the connecting block 9. A V-groove 11 is provided between the connecting block 9 and the slider 10. A limiting block 4 that matches the V-groove 11 is fixedly provided at the end of the L-shaped rod 3. A gap is provided between the two sliders 10 for the lower end of the limiting block 4 to pass through. The limiting block 4 is triangular on both sides. After the limiting block 4 at the lower end of the L-shaped rod 3 pushes the slider 10 into the V-groove 11, it is restricted. When recovery is required, it is only necessary to pull the oil extraction pipe 2 to pull up the moving ring 5 and the connecting block 9 on it to release the support and achieve the recovery purpose. When the oil extraction pipe 2 is working normally, the limiting block 4 at the end of the L-shaped rod 3 on it does not directly contact the slider 10.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A hydraulic locking device for downhole applications, comprising a sucker pipe (2) and a fixing sleeve (1) sleeved on the outer wall of the sucker pipe (2), characterized in that: The outer wall of the fixed sleeve (1) is provided with a support assembly, and the outer wall of the oil extraction pipe (2) is provided with a recovery assembly; The support assembly includes a fixed ring (6) fixed on the outer wall of the fixed sleeve (1) and a movable ring (5) located above the fixed ring (6) and slidably connected to the fixed sleeve (1). The outer walls of the movable ring (5) and the fixed ring (6) are also provided with a limiting mechanism to prevent the oil pipe (2) from falling. The recovery component includes an L-shaped rod (3) arranged in a ring array on the outer wall of the sucker pipe (2), and a connecting block (9) arranged in a ring array on the outer wall of the moving ring (5) for limiting the ends of the L-shaped rod (3).

2. The hydraulic locking device for downhole applications according to claim 1, characterized in that: The limiting mechanism also includes multiple connecting rods (7) that are rotatably disposed on the outer walls of the moving ring (5) and the fixed ring (6), and a fixed block (8) is rotatably connected between every two connecting rods (7).

3. A hydraulic locking device for downhole applications according to claim 2, characterized in that: A trapezoidal hollow is provided on one side wall of the fixing block (8).

4. A hydraulic locking device for downhole applications according to claim 1, characterized in that: The recycling assembly also includes a slider (10) that slides on the upper end of the connecting block (9), and rectangular cutouts are provided on both sides of the slider (10). A spring (12) is fixedly connected to the cutout. The other end of the spring (12) is fixedly connected to the connecting block (9). A V-groove (11) is provided between the connecting block (9) and the slider (10). A limiting block (4) that matches the V-groove (11) is fixedly provided at the end of the L-shaped rod (3).

5. A hydraulic locking device for downhole applications according to claim 4, characterized in that: A gap is provided between the two sliders (10) for the lower end of the limiting block (4) to pass through, and the two sides of the limiting block (4) are arranged in a triangular shape.

6. A hydraulic locking device for downhole applications according to claim 1 or 5, characterized in that: When the oil extraction pipe (2) is working normally, the limiting block (4) at the end of the L-shaped rod (3) on it does not directly contact the slider (10).

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