A sucker rod back spanner

Abstract

The application discloses a sucker rod back wrench, which comprises a fixing cylinder used for fixing with a well head, a guide rail disc is fixed on the outer cylinder wall of the fixing cylinder, a through rail groove is arranged on the disc surface of the guide rail disc, the through rail groove is eccentric with the center of the fixing cylinder, a circumferential moving sleeve is inserted into the through rail groove, the circumferential moving sleeve is fixed through a back female, a rotating sleeve is inserted into the circumferential moving sleeve, a circumferential groove is arranged on the outer wall of the rotating sleeve, a through hole is formed in the cylinder wall of the circumferential moving sleeve, a mounting pin is inserted into the circumferential groove of the rotating sleeve through the through hole on the circumferential moving sleeve, so that the rotating sleeve can rotate in the circumferential moving sleeve, a shaft core is connected to the rotating sleeve through a trapezoidal thread, a wrench sleeve capable of being inserted into the handle of a wrench is fixed to the top end of the shaft core, and an elongated hole is formed in the wrench sleeve.

Description

Technical Field

[0001] This invention belongs to the field of oilfield well workover operations, and particularly relates to a sucker rod back clamp. Background Technology

[0002] The sucker rod is a slender rod in a pumping unit well. It connects to the polished rod at the top and the pump at the bottom, transmitting power. Raising or lowering the sucker rod requires multiple people (2-3 people) with various tools and close coordination, resulting in high labor intensity and low efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a sucker rod back clamp that reduces the need for manual operation, reduces labor intensity, and improves efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a sucker rod back clamp, comprising a fixing cylinder for fixing to the wellhead, a horizontal guide plate fixed on the outer wall of the fixing cylinder, an arc-shaped through track groove provided on the surface of the guide plate, the through track groove being not concentric with the center of the fixing cylinder, a circumferential moving sleeve inserted into the through track groove, the circumferential moving sleeve being fixed on the guide plate and movable along the through track groove by connecting with a back nut thread below the guide plate, a rotating sleeve inserted in the circumferential moving sleeve, the outer wall of the rotating sleeve being provided with a circumferential groove, a through hole opened on the wall of the circumferential moving sleeve, an installation pin passing through the through hole on the circumferential moving sleeve and inserted into the circumferential groove of the rotating sleeve, so that the rotating sleeve can rotate in the circumferential moving sleeve, a shaft core connected to the rotating sleeve by a trapezoidal thread, a horizontal wrench glove fixed at the top of the shaft core, a wrench handle being inserted into the horizontal wrench glove, an elongated hole opened on the wrench glove, the wrench being slidably fixed on the rotating sleeve by inserting a rod into the elongated hole and the wrench handle.

[0005] The fixed cylinder and guide rail are welded and fixed; the shaft and wrench are welded and fixed.

[0006] A friction-reducing ring is installed in the annular space between the circumferential moving sleeve and the rotating sleeve.

[0007] A handle is mounted radially on the outside of the rotating sleeve.

[0008] The circumferentially movable sleeve has two through holes, which are symmetrically arranged.

[0009] The guide rail disk is a fan-shaped disk that extends through the outer edge of the fan-shaped disk adjacent to the track groove.

[0010] The beneficial effects of this invention are: this invention enables a single person to lift and lower the sucker rod from the wellhead using a sucker rod back clamp, thereby reducing operation time, reducing labor intensity, and improving efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the sucker rod back clamp structure of the present invention;

[0012] Figure 2 This is a schematic diagram of the guide rail disc of the sucker rod back clamp of the present invention;

[0013] Figure 3 This is a diagram showing the wrench structure of the sucker rod back clamp of the present invention;

[0014] In the diagram: 1-fixed cylinder, 2-guide rail disc, 3-back nut, 4-circumferential moving sleeve, 5-friction reduction ring, 6-installation pin, 7-rotating sleeve, 8-shaft core, 9-handle, 10-wrench, 11-wrench glove, 12-through track groove. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0016] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] like Figure 1-3As shown, the sucker rod back clamp of the present invention includes a fixing cylinder 1 for fixing to the wellhead. A horizontal guide rail disk 2 is fixed on the outer wall of the fixing cylinder 1. An arc-shaped through track groove 12 is provided on the surface of the guide rail disk 2. The through track groove 12 is not concentric with the center of the fixing cylinder 1. A circumferential moving sleeve 4 is inserted into the through track groove 12. The circumferential moving sleeve 4 is fixed on the guide rail disk 2 and can move along the through track groove by being threadedly connected to the back nut 3 below the guide rail disk 2. A rotating part is inserted in the circumferential moving sleeve 4. The outer wall of the rotating sleeve 7 is provided with a circumferential groove. The circumferential moving sleeve 4 has a through hole on its cylindrical wall. The mounting pin 6 passes through the through hole on the circumferential moving sleeve and is inserted into the circumferential groove of the rotating sleeve, so that the rotating sleeve 7 can rotate in the circumferential moving sleeve 4. The rotating sleeve 7 is connected to the shaft core 8 by a trapezoidal thread. The top of the shaft core 8 is fixed with a horizontal wrench sleeve 11 that can be inserted into the handle of the wrench 10. The wrench sleeve 11 has an elongated hole. The wrench 10 is slidably fixed on the rotating sleeve 7 by inserting into the elongated hole and the insert rod 13 in the wrench handle.

[0019] Preferably, the fixed cylinder 1 and the guide rail disk 2 are welded and fixed; the shaft core 8 and the wrench 11 are welded and fixed.

[0020] Preferably, a wear-reducing ring 5 is installed in the annular space between the circumferential moving sleeve 4 and the rotating sleeve 7.

[0021] Preferably, a handle 9 is radially mounted on the outside of the rotating sleeve 7.

[0022] Preferably, the circumferentially movable sleeve 4 has two through holes on its cylindrical wall, and the two through holes are symmetrically arranged.

[0023] Preferably, the guide rail disk 2 is a fan-shaped disk that passes through the outer edge of the track groove 12 adjacent to the fan-shaped disk.

[0024] In simple terms, the guide rail plate 2 is provided with a through track groove 12, which is not concentric with the center of the fixed cylinder 1; a circumferential moving sleeve 4 is inserted and installed in the through track groove 12 of the guide rail plate 2, and the circumferential moving sleeve 4 is threadedly connected to the back nut 3; a wrench 10 is installed inside the wrench sleeve 11; the circumferential moving sleeve 4 and the rotating sleeve 7 are fixedly connected by a mounting pin 6, and the circumferential moving sleeve 4 and the rotating sleeve 7 can rotate; a friction-reducing ring 5 is installed in the annular space between the circumferential moving sleeve 4 and the rotating sleeve 7; a handle 9 is radially installed on the outside of the rotating sleeve 7; the rotating sleeve 7 and the shaft core 8 are connected by a trapezoidal thread; the back nut 3, the circumferential moving sleeve 4, the friction-reducing ring 5, and the mounting pin are all present. 6. The rotating sleeve 7, shaft core 8, handle 9, wrench 10, and wrench sleeve 11 can revolve within the through-track groove 12. The wrench 10, wrench sleeve 11, and shaft core 8 can rotate on their own axis. The wrench 10 can move radially within the wrench sleeve 11. The combination of rotation, revolution, and radial movement ensures that the straight end of the wrench 10 engages with the square cross-section of the sucker rod for clamping. The height of the wrench 10 and wrench sleeve 11 can be adjusted by rotating the rotating sleeve 7 via the handle 9. By setting the through-track groove 12 and the fixed cylinder 1 to be non-concentric, the wrench 10 can tighten one sucker rod, and tightening the other sucker rod with pipe wrenches will not cause the wrench 10 to move along the through-track groove 11.

[0025] The sucker rod back clamp of the present invention specifically includes the following steps for lifting and lowering the sucker rod:

[0026] (1) Connection and fixation to the wellhead: The wellhead fixing cylinder 1 is fixed to the wellhead by clamps;

[0027] (2) Setting up the sucker rod clamp: After lifting one sucker rod through the clamp, the next sucker rod is suspended from the wellhead fixing cylinder 1 of the sucker rod back clamp through another sucker rod clamp;

[0028] (3) Movement adjustment: The wrench 10 rotates, revolves and moves radially so that the straight end of the wrench 10 fits and clamps with the square cross-section of the next sucker rod;

[0029] (4) Tightening: Use pipe wrench to tighten the other sucker rod. By setting the center of the through track groove 12 to be different from that of the fixed cylinder 1, the wrench 10 is tightened on one sucker rod. Tightening the other sucker rod with pipe wrench will not cause the wrench 10 to move along the through track groove 11. Tightening is completed.

[0030] (5) Repeat (1)-(4): One operator completes the lifting and lowering of all sucker rods.

[0031] In summary, the content of this invention is not limited to the above-described embodiments. Those skilled in the art can easily propose other embodiments within the technical guiding principles of this invention, but such embodiments are all included within the scope of this invention.

Claims

1. A sucker rod back clamp, characterized in that, The system includes a fixed cylinder (1) for fixing to the wellhead. A horizontal guide rail disc (2) is fixed on the outer wall of the fixed cylinder (1). An arc-shaped through track groove (12) is provided on the surface of the guide rail disc (2). The through track groove (12) is not concentric with the center of the fixed cylinder (1). A circumferential moving sleeve (4) is inserted into the through track groove (12). The circumferential moving sleeve (4) is fixed to the guide rail disc (2) and can move along the through track groove by being threaded to the back nut (3) below the guide rail disc (2). A rotating sleeve (7) is inserted into the circumferential moving sleeve (4). The outer wall of the sleeve (7) is provided with a circumferential groove. The circumferential moving sleeve (4) has a through hole on its cylindrical wall. The mounting pin (6) passes through the through hole on the circumferential moving sleeve and is inserted into the circumferential groove of the rotating sleeve, so that the rotating sleeve (7) can rotate in the circumferential moving sleeve (4). The rotating sleeve (7) is connected to the shaft core (8) by a trapezoidal thread. The top of the shaft core (8) is fixed with a horizontal wrench glove (11) that can be inserted into the handle of the wrench (10). The wrench glove (11) has an elongated hole. The wrench (10) is slidably fixed on the rotating sleeve (7) by inserting into the elongated hole and the insert rod (13) in the wrench handle.

2. The sucker rod back clamp according to claim 1, characterized in that, The fixed cylinder (1) and the guide rail disc (2) are welded and fixed; the shaft core (8) and the wrench (11) are welded and fixed.

3. The sucker rod back clamp according to claim 1, characterized in that, A friction-reducing ring (5) is installed in the annular space between the circumferential moving sleeve (4) and the rotating sleeve (7).

4. The sucker rod back clamp according to claim 1, characterized in that, A handle (9) is radially mounted on the outside of the rotating sleeve (7).

5. The sucker rod back clamp according to claim 1, characterized in that, The circumferential moving sleeve (4) has two through holes on its cylindrical wall, and the two through holes are arranged symmetrically.

6. The sucker rod back clamp according to claim 1, characterized in that, The guide rail disk (2) is a fan-shaped disk that passes through the track groove (12) adjacent to the outer edge of the fan-shaped disk.

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