Well repair receding device and tower type oil pumping unit

Abstract

The utility model relates to the technical field of oil pumping units, in particular to a well repair receding device and a tower type oil pumping unit, the well repair receding device comprises a foundation body, a fixed base, a movable base and a traction mechanism, and the fixed base is fixedly installed on the upper side of the foundation body. The movable base is reasonable and compact in structure, when the movable base is used, a machine frame of the oil pumping unit is fixedly installed on the upper side of the movable base, a beam hanger of the oil pumping unit and a well mouth polish rod are installed together, and when workover operation needs to be carried out, the lower portion of the upper positioning base and the upper portion of the lower positioning base at the corresponding position are detached. Then the movable base drives the oil pumping unit to move rightwards through the traction mechanism, in this way, follow-up workover operation is facilitated, after the workover operation is finished, the movable base moves leftwards to the initial position through the traction mechanism, and then the lower portion of each upper positioning base and the upper portion of the lower positioning base at the corresponding position are fixedly installed together; the beam hanger of the pumping unit and the well mouth polish rod are installed together, and normal production operation can be carried out.

Description

Technical Field

[0001] This utility model relates to the field of oil pumping unit technology, and is a well workover clearance device and a tower-type oil pumping unit. Background Technology

[0002] Currently, before and after oil well operations, it is necessary to move and reposition the pumping unit. To facilitate the movement of the pumping unit during well workover operations, Chinese patent document CN204185171U discloses a belt-driven pumping unit relocation device, which includes a lever hoist, guide wheels, and a wire rope. Two guide wheels are provided and can be fixed side-by-side on both sides of the pumping unit base. One end of the wire rope can be fixed to a lifting point on one side of the concrete foundation of the belt-driven pumping unit, and the other end can pass around the two guide wheels and connect in the opposite direction to the chain hook of the lever hoist. The hook of the lever hoist can be fixed to a lifting point on the other side of the concrete foundation of the belt-driven pumping unit via a connector. In use, the wire rope must first be connected to a fixed connector, and then pass around two movable connectors to connect to a tensioning device. The tensioning device also needs to be connected to another fixed connector via a short rope loop. This not only requires a long wire rope, but also makes the entire installation process of the relocation device too cumbersome, affecting work efficiency.

[0003] Chinese patent document CN210068101U discloses a movable, beamless pumping unit, which includes a base, a tower body, and a drive mechanism. The base is installed on a concrete foundation using anchor bolts. The tower body is mounted on the base, and the drive mechanism is mounted on a platform at the top of the tower body. The drive mechanism includes a motor, a reduction gear, a roller, a belt, and a counterweight. The two ends of the belt are connected to the counterweight and the suspension rope device of the pumping unit, respectively. The belt wraps around the roller from the top. The motor drives the roller to rotate via the reduction gear. The rotation of the roller causes the suspension rope devices and the counterweight at both ends of the belt to move up and down under the belt's influence, thus enabling the pumping action of the pumping unit. The tower body is a four-column frame structure. Bearings are installed at various points, allowing the tower body to slide relative to the base. The tower body and base are secured with bolts, which are elongated. A threaded sleeve is fixedly connected to the base at the end furthest from the wellhead, and a lead screw is screwed into the sleeve. One end of the lead screw is connected to the tower body, and the other end is fitted with a turntable for rotating the lead screw. The reduction mechanism is a planetary gear reduction mechanism located inside the drum. The high-speed input shaft of the planetary gear reduction mechanism is located in the center of the drum, while the low-speed output shaft is the drum itself. The output shaft of the motor is connected to the high-speed input shaft via a coupling. Dustproof sealing covers are installed at both ends of the drum. A winch is installed on the platform and connected to a counterweight via a wire rope. This pumping unit uses the rotation of the lead screw to move the entire unit; however, the pumping unit has poor stability during movement and is prone to tilting.

[0004] However, there are safety hazards when using a well cleaning rig to relocate the pumping unit. It is easily restricted by the space at the well site, and wheeled equipment may not have enough power. After the well workover is completed, the entire pumping unit must be moved to its original position, i.e., a reset operation. During the reset, it is necessary to ensure that the suspension cable is aligned with the wellhead. The existing clearance mechanism makes the alignment of the suspension cable with the wellhead difficult, time-consuming, and labor-intensive. Summary of the Invention

[0005] This utility model provides a well workover clearance device and a tower-type pumping unit, which overcomes the shortcomings of the prior art and can effectively solve the problems of difficult operation and time-consuming and labor-intensive operation when resetting the existing clearance mechanism.

[0006] One of the technical solutions of this utility model is achieved through the following measures: a well workover clearance device and a tower-type pumping unit, including a base body, a fixed base, a movable base and a traction mechanism. A fixed base is fixedly installed on the upper side of the base body, and a movable base is slidably installed on the upper side of the fixed base. A traction mechanism is provided on the right side of the fixed base, which enables the movable base to move left and right on the upper side of the fixed base. A front positioning component is provided on the upper front side of the fixed base. The front positioning component includes an upper positioning seat and at least one lower positioning seat spaced left and right. Each lower positioning seat has a lower positioning surface that smoothly transitions from left to right and from top to bottom on its upper side. For two adjacent lower positioning seats, the height of the right end of the lower positioning surface on the left is greater than the height of the left end of the lower positioning surface on the right. An upper positioning seat is fixedly installed on the front side of the movable base corresponding to each lower positioning seat position. Each upper positioning seat has an upper positioning surface on its lower side that matches the lower positioning surface. The lower part of each upper positioning seat and the upper part of the corresponding lower positioning seat can be detachably and fixedly installed together. A rear positioning component with the same structure as the front positioning component is provided on the upper rear side of the fixed base.

[0007] The following are further optimizations and / or improvements to one of the above-mentioned utility model technical solutions:

[0008] The aforementioned fixed base has two or three lower positioning seats spaced apart on the left front side. Each lower positioning seat has a lower positioning surface that slopes from left to right and from top to bottom on its upper side. Each lower positioning seat has several lower connecting through holes spaced apart circumferentially on its upper part. The central axis of each lower connecting through hole is perpendicular to the upper positioning surface. Each upper positioning seat has an upper connecting through hole whose central axis is perpendicular to the upper positioning surface and corresponds to the lower connecting through hole. The lower part of each upper positioning seat and the upper part of the corresponding lower positioning seat are detachably and fixedly installed together through a first connecting piece that passes through the upper connecting through hole and the corresponding lower connecting through hole.

[0009] The aforementioned front positioning component may further include a lower fixing seat. The lower fixing seat is fixedly installed on the front side of the fixing base. The lower fixing seat is located to the right of the rightmost lower positioning seat. Several fixing through holes are distributed circumferentially on the upper side of the lower fixing seat. After the leftmost upper positioning seat moves to the right, it can be detachably and fixedly installed together with the lower fixing seat.

[0010] The aforementioned traction mechanism may include a drive motor, a drive sprocket, a driven sprocket, and a chain. The drive motor is mounted on the right side of the fixed base. The drive sprocket is fixedly mounted on the outer front part of the output shaft of the drive motor. The driven sprocket is rotatably mounted on the inner right side of the movable base. A left adjustment frame and a right adjustment frame are fixedly mounted at intervals on the inner side of the movable base corresponding to the right position of the driven sprocket. A left adjustment rod is provided in the left adjustment frame, and a right adjustment rod is provided in the right adjustment frame. A chain connects the left end of the left adjustment rod and the right end of the right adjustment rod. The drive sprocket and the driven sprocket are connected together through the chain drive.

[0011] The fixed base corresponding to the position between the front positioning component and the rear positioning component is provided with two parallel guide rails spaced back and forth on its upper side, and the movable base corresponding to each guide rail position is provided with several support rollers that are rotatably installed left and right at intervals on its lower side.

[0012] Each of the above guide rails may be provided with an upward-opening guide groove on its upper side. Each guide groove is provided with several guide sliders that are fixedly installed together with the lower side of the movable base on their upper side at intervals on the left and right. Each guide slider is slidably installed in the guide groove.

[0013] The second technical solution of this utility model is achieved through the following measures: a tower-type pumping unit, including a well workover clearance device and a pumping unit body, wherein the lower side of the pumping unit body is fixedly installed on the upper side of the movable base of the well workover clearance device.

[0014] This utility model has a reasonable and compact structure. In use, the pumping unit frame is fixedly installed on the upper side of the movable base, and the pumping unit's suspension rope is installed together with the wellhead polished rod. When well workover is required, the lower part of the upper positioning seat is disassembled from the upper part of the corresponding lower positioning seat. Then, the traction mechanism is used to move the movable base to the right, which facilitates subsequent well workover operations. After the well workover is completed, the traction mechanism is used to move the movable base to the left to the initial position, and then the lower part of each upper positioning seat is fixedly installed together with the upper part of the corresponding lower positioning seat. The pumping unit's suspension rope is installed together with the wellhead polished rod, and normal production operations can then be carried out. Attached Figure Description

[0015] Appendix Figure 1 These are schematic diagrams of partial cross-sectional views of embodiments one through seven of this utility model.

[0016] Appendix Figure 2 This is a schematic diagram of the main view structure after the relocation of embodiments one to seven of this utility model.

[0017] Appendix Figure 3 This is a right-side structural schematic diagram of embodiments one to seven of this utility model.

[0018] Appendix Figure 4 This is a top view of the structure of embodiments one to seven of this utility model.

[0019] Appendix Figure 5 This is a top view of the structure after the relocation of embodiments one through seven of this utility model.

[0020] Appendix Figure 6 This is a three-dimensional structural diagram of embodiments one to seven of this utility model.

[0021] Appendix Figure 7 This is a three-dimensional structural diagram of embodiments one through seven of this utility model after the relocation.

[0022] Appendix Figure 8 This is a three-dimensional partial cross-sectional view of embodiments one to seven of this utility model.

[0023] The codes in the attached diagram are as follows: 1 is the base body, 2 is the fixed base, 3 is the movable base, 4 is the upper positioning seat, 5 is the upper positioning surface, 6 is the lower positioning seat, 7 is the lower positioning surface, 8 is the rear positioning assembly, 9 is the first connecting piece, 10 is the lower fixed seat, 11 is the connecting column, 12 is the connecting bolt, 13 is the drive motor, 14 is the driving sprocket, 15 is the driven sprocket, 16 is the chain, 17 is the left adjusting frame, 18 is the left adjusting rod, 19 is the right adjusting frame, 20 is the right adjusting rod, 21 is the guide rail, 22 is the support roller, 23 is the guide groove, 24 is the guide slider, and 25 is the pumping unit body. Detailed Implementation

[0024] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0025] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0026] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0027] Example 1: As shown in the attached document Figures 1 to 8 As shown, the well workover clearance device includes a base body 1, a fixed base 2, a movable base 3, and a traction mechanism. The fixed base 2 is fixedly installed on the upper side of the base body 1, and the movable base 3 is slidably installed on the upper side of the fixed base 2. The right side of the fixed base 2 is provided with a traction mechanism that allows the movable base 3 to move left and right on the upper side of the fixed base 2. The upper front side of the fixed base 2 is provided with a front positioning component, which includes an upper positioning seat 4 and at least one lower positioning seat 6 spaced left and right. Each lower positioning seat 6 has a lower positioning surface 7 that smoothly transitions from left to right and from top to bottom on its upper side. For two adjacent lower positioning seats 6, the height of the right end of the left lower positioning surface 7 is greater than the height of the left end of the right lower positioning surface 7. The upper positioning seat 4 is fixedly installed on the front side of the movable base 3 corresponding to each lower positioning seat 6 position. Each upper positioning seat 4 has an upper positioning surface 5 that matches the lower positioning surface 7 on its lower side. The lower part of each upper positioning seat 4 and the upper part of the corresponding lower positioning seat 6 can be detachably and fixedly installed together. The upper rear side of the fixed base 2 is provided with a rear positioning component 8 with the same structure as the front positioning component.

[0028] According to requirements, the foundation body 1 can be formed by concrete pouring. In order to improve the strength of the foundation body 1, steel bars can also be embedded in the poured concrete to form a reinforced concrete structure. Each lower positioning seat 6 has a lower positioning surface 7 that smoothly transitions from left to right and from top to bottom on its upper side. The lower positioning surface 7 can be an arc surface or an inclined surface. The fixed base 2 can be composed of several steel plates that are fixedly installed together with the foundation body 1 by anchor bolts. Each lower positioning seat 6 has a lower positioning surface 7 that smoothly transitions from left to right and from top to bottom on its upper side. Each upper positioning seat 4 has an upper positioning surface 5 that matches the lower positioning surface 7 on its lower side. This facilitates the positioning of the movable base 3 and makes it easier to lock the movable base 3 and the fixed base 2, making the reset operation more convenient, time-saving and labor-saving. For two adjacent lower positioning seats 6, the height of the right end of the left lower positioning surface 7 is greater than the height of the left end of the right lower positioning surface 7. This can avoid interference between the left upper positioning seat 4 and the right lower positioning seat 6 when the left upper positioning seat 4 moves to the right, and can ensure that the movable base 3 moves more smoothly left and right.

[0029] In use, the pumping unit frame is fixedly installed on the upper side of the movable base 3. The pumping unit's suspension rope is installed together with the wellhead polished rod. When well workover is required, the lower part of the upper positioning seat 4 is disassembled from the upper part of the corresponding lower positioning seat 6. Then, the traction mechanism is used to move the movable base 3 to the right, which facilitates subsequent well workover operations. After the well workover is completed, the traction mechanism is used again to make the upper positioning surface 5 contact the corresponding lower positioning surface 7, which moves the movable base 3 to the left to the initial position. Then, the lower part of each upper positioning seat 4 is fixedly installed together with the upper part of the corresponding lower positioning seat 6. The pumping unit's suspension rope is installed together with the wellhead polished rod, and normal production operations can then be carried out.

[0030] The above-mentioned well workover clearance device can be further optimized and / or improved according to actual needs:

[0031] Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figures 3, 5, 6, and 7, two or three lower positioning seats 6 are arranged at intervals on the left front side of the fixed base 2. Each lower positioning seat 6 has a lower positioning surface 7 that slopes from left to right and from top to bottom on its upper side. Each lower positioning seat 6 has several lower connecting through holes distributed circumferentially on its upper part. The central axis of each lower connecting through hole is perpendicular to the upper positioning surface 5. Each upper positioning seat 4 has an upper connecting through hole whose central axis is perpendicular to the upper positioning surface 5 and corresponds to the lower connecting through hole. The lower part of each upper positioning seat 4 and the upper part of the corresponding lower positioning seat 6 are detachably and fixedly installed together through a first connecting piece 9 that passes through the upper connecting through hole and the corresponding lower connecting through hole in the middle.

[0032] According to the requirements, two lower positioning seats 6 are set at intervals on the left front side of the fixed base 2. The lower positioning surface 7 and the upper positioning surface 5 are both inclined surfaces from left to right and from top to bottom, which facilitates the processing and manufacturing of the lower positioning surface 7 and the upper positioning surface 5. The total height of the left lower positioning seat 6 and the left upper positioning seat 4 is the same as the total height of the right lower positioning seat 6 and the right upper positioning seat 4. The first connecting piece 9 is a known technology. After the lower end passes through the upper connecting through hole and the lower connecting through hole in sequence, a fastening bolt with a connecting nut is screwed on. This facilitates the disassembly and assembly of the movable base 3. The lower positioning seat 6 can be made of a horizontal base plate, an inclined top plate, and an H-beam fixed between the horizontal base plate and the horizontal top plate. In order to improve the strength of the lower positioning seat 6, reinforcing ribs are welded between the two sides of the flange of the H-beam and the horizontal base plate and the inclined top plate.

[0033] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figures 3, 6, 7, and 8, the front positioning assembly also includes a lower fixing seat 10. The lower fixing seat 10 is fixedly installed on the front side of the fixing base 2. The lower fixing seat 10 is located to the right of the rightmost lower positioning seat 6. Several fixing through holes are distributed circumferentially on the upper side of the lower fixing seat 10. After the leftmost upper positioning seat 4 moves to the right, it can be detachably and fixedly installed together with the lower fixing seat 10.

[0034] As required, the height of the upper side of the lower fixed seat 10 is less than the height of the right side of the rightmost lower positioning surface 7 to avoid interference between the upper positioning seat 4 and the lower fixed seat 10 when the upper positioning seat 4 moves to the right. During use, after the movable base 3 moves to the right, the leftmost upper positioning seat 4 can be detachably and fixedly installed with the lower fixed seat 10, ensuring maximum clearance. The leftmost upper positioning seat 4 and the lower fixed seat 10 can be detachably and fixedly installed together using existing known connectors, such as steel wires passing through the fixing through hole and the upper connecting through hole. Alternatively, they can be detachably and fixedly installed together using a second connector, which includes a connecting post 11 and a connecting bolt 12. Both the lower side of the connecting post 11 and the upper side of the lower fixed seat 10 are... The upper side of the connecting column 11 and the lower side of the upper positioning seat 4 are both inclined surfaces from left to right and from top to bottom. The lower side of the connecting column 11 and the upper side of the lower fixed seat 10, as well as the upper side of the connecting column 11 and the lower side of the upper positioning seat 4, are detachably fixed together by several connecting bolts 12 distributed circumferentially and with nuts screwed to the ends. The second connecting piece can be installed inside the movable base 3, which makes it easy to remove the movable base 3 after it is moved to the right. The leftmost upper positioning seat 4 is moved to the right and fixed together with the lower fixed seat 10, thus realizing the fixation between the movable base 3 and the fixed base 2.

[0035] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 1 , 3As shown in Figures 4, 5, 6, 7, and 8, the traction mechanism includes a drive motor 13, a drive sprocket 14, a driven sprocket 15, and a chain 16. The drive motor 13 is mounted on the right side of the fixed base 2. The drive sprocket 14 is fixedly mounted on the outer front part of the output shaft of the drive motor 13. The driven sprocket 15 is rotatably mounted on the inner right side of the movable base 3. A left adjusting frame 17 and a right adjusting frame 19 are fixedly mounted on the inner side of the movable base 3 at intervals to the right of the driven sprocket 15. A left adjusting rod 18 is provided inside the left adjusting frame 17, and a right adjusting rod 20 is provided inside the right adjusting frame 19. A chain 16 connects the left end of the left adjusting rod 18 and the right end of the right adjusting rod 20. The drive sprocket 14 and the driven sprocket 15 are connected together by the chain 16.

[0036] Depending on the requirements, the drive motor 13 is a known geared motor or stepper motor. Both the left adjusting bracket 17 and the right adjusting bracket 19 have threaded through holes on their left sides. The right side of the left adjusting rod 18 is screwed into the threaded through hole on the left, and the left side of the right adjusting rod 20 is screwed into the threaded through hole on the right. The chain 16 is a known technology, such as a roller chain. The driving sprocket 14 and the driven sprocket 15 mesh with the roller chain. The chain 16 can also be a circular link chain used in known hoists, with the driving sprocket 14 and the driven sprocket 15 meshing with the circular link chain. To facilitate the assembly and disassembly of the left adjusting rod 18 and the right adjusting rod 20 with the chain 16, the chain 16 in this embodiment is a circular link chain with larger holes. This prevents sand and dust from falling into the circular link chain, reducing the failure rate and shortening the maintenance cycle. The left adjusting rod 18... Both the left and right adjusting rods 17 and 20 are existing hook bolts, allowing the hooks of the bolts to hook onto both ends of the circular chain. To facilitate adjustment of the chain tension, both the left and right adjusting frames 17 and 19 have adjusting through holes on their left sides. The right side of the left adjusting rod 18 is fitted into the left adjusting through hole, and the left side of the right adjusting rod 20 is fitted into the right adjusting through hole. Left adjusting nuts are screwed onto the outside of the left adjusting rod 18 on both sides of the left adjusting frame 17, and right adjusting nuts are screwed onto the outside of the right adjusting rod 20 on both sides of the right adjusting frame 19. By rotating the left and right adjusting nuts, the left and right adjusting rods 18 and 20 can be moved left and right, thereby adjusting the tension of the chain 16. This also provides a locking effect for the left and right adjusting rods 18 and 20.

[0037] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown in Figures 3, 6, 7, and 8, two parallel guide rails 21 are provided on the upper side of the fixed base 2 at a distance between the front positioning component and the rear positioning component 8. Several support rollers 22 are installed on the lower side of the movable base 3 at a distance between left and right for each guide rail 21.

[0038] Depending on the requirements, the guide rail 21 can be made using existing known technology, such as fixing two parallel I-shaped steel, H-shaped steel or H-shaped steel on the upper side of the fixed base 2, and supporting rollers 22 rolling on the upper side of the guide rail 21. In this way, the supporting rollers 22 can reduce the resistance when the movable base 3 moves left and right on the upper side of the fixed base 2, which can reduce the load on the drive motor 13, thereby reducing the strength requirements of the chain 16 and reducing the manufacturing cost.

[0039] Example 6: As an optimization of the above examples, as shown in the appendix Figure 3 , 4 As shown in Figures 6, 7, and 8, each guide rail 21 has an upward-opening guide groove 23 on its upper side. Each guide groove 23 has several guide sliders 24, whose upper sides are fixedly installed together with the lower side of the movable base 3, spaced apart on the left and right. Each guide slider 24 is slidably installed in the guide groove 23.

[0040] According to the requirements, each guide rail 21 is composed of two H-beams fixedly installed together at a distance from front to back, forming a guide groove 23 between the two H-beams. In order to prevent the guide slider 24 from separating from the guide rail 21 after moving left and right, baffles are fixed between the left and right ends of the two H-beams. A limiting block can also be fixedly installed on the lower side of the guide slider 24. The limiting block is slidably installed between the web plates of the two H-beams. This can prevent the movable base 3 from being subjected to external forces (such as wind force) and causing the movable base 3 to separate from the fixed base 2 after moving back and forth or upward. This can ensure the connection stability between the movable base 3 and the fixed base 2, avoid safety accidents, and also ensure that the movable base 3 is more stable when moving left and right on the upper side of the fixed base 2.

[0041] Example 7: As attached Figures 1 to 8 As shown, the tower-type pumping unit includes a well workover clearance device and a pumping unit body 25. The lower side of the pumping unit body 25 is fixedly installed on the upper side of the movable base 3 of the well workover clearance device.

[0042] According to the requirements, the pumping unit body 25 is a well-known tower-type pumping unit. In this embodiment, the pumping unit body 25 is a belt-type pumping unit. In order to improve the safety of the belt-type pumping unit, a wind shield is installed on the outside of the tower of the belt-type pumping unit, such as the beamless belt-type pumping unit disclosed in Chinese patent document CN222185741U. The wind shield can prevent the wind from blowing the belt inside the tower, etc., and avoid affecting the pumping operation.

[0043] In use, the lower side of the base of the pumping unit body 25 is fixed to the upper side of the movable base 3. The drive motor 13 is electrically connected to the controller in the control cabinet of the pumping unit body 25. The suspension rope of the pumping unit is installed together with the wellhead polished rod. When well workover is required, the first connecting piece 9 between the lower part of the upper positioning seat 4 and the upper part of the corresponding lower positioning seat 6 is removed. Then, the output shaft of the drive motor 13 is rotated forward by the controller. After the drive sprocket 14 rotates forward (clockwise), the end of the chain 16 connected to the right adjusting rod 20 moves to the right. This movement of the right adjusting rod 20 to the right can drive the right adjusting frame 19 and the movable base 3 to move to the right. After the movable base 3 and the pumping unit body 25 have moved to the right a certain distance, in this embodiment, the movable base 3 and the pumping unit body 25 have moved 2500mm to the right. Then, the leftmost upper positioning seat 4 and lower fixed seat 10 are fixed together using the second connector, allowing for well workover operations. After the workover operation is completed, the output shaft of the drive motor 13 is reversed by the controller, and the drive sprocket 14 is reversed (rotated counterclockwise), causing the end of the chain 16 connected to the right adjusting rod 20 to move to the left. This movement of the right adjusting rod 20 to the left can drive the right adjusting frame 19 and the movable base 3 to move to the left. When the upper positioning surface 5 contacts the corresponding lower positioning surface 7, it indicates that the movable base 3 and the pumping unit body 25 have moved to the initial position to the left. Finally, the lower part of each upper positioning seat 4 and the upper part of the corresponding lower positioning seat 6 are fixed together using the first connector 9. The pumping unit's suspension rope is installed together with the wellhead polished rod, allowing for normal production operations.

[0044] The above technical features constitute various embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A well workover clearance device, characterized in that... The system includes a base, a fixed base, a movable base, and a traction mechanism. The fixed base is fixedly mounted on the upper side of the base, and the movable base is slidably mounted on the upper side of the fixed base. The right side of the fixed base is equipped with a traction mechanism that allows the movable base to move left and right on the upper side of the fixed base. The upper front side of the fixed base is equipped with a front positioning component, which includes an upper positioning seat and at least one lower positioning seat spaced left and right. Each lower positioning seat has a lower positioning surface that smoothly transitions from left to right and from top to bottom on its upper side. For two adjacent lower positioning seats, the height of the right end of the lower positioning surface on the left is greater than the height of the left end of the lower positioning surface on the right. The upper front side of the movable base corresponding to each lower positioning seat is fixedly mounted with an upper positioning seat. The lower side of each upper positioning seat has an upper positioning surface that matches the lower positioning surface. The lower part of each upper positioning seat and the upper part of the corresponding lower positioning seat can be detachably and fixedly installed together. The upper rear side of the fixed base is equipped with a rear positioning component with the same structure as the front positioning component.

2. The well workover clearance device according to claim 1, characterized in that... The left front side of the fixed base is provided with two or three lower positioning seats at intervals. Each lower positioning seat has a lower positioning surface that slopes from left to right and from top to bottom on its upper side. Each lower positioning seat has several lower connecting through holes distributed circumferentially on its upper part. The central axis of each lower connecting through hole is perpendicular to the upper positioning surface. Each upper positioning seat has an upper connecting through hole whose central axis is perpendicular to the upper positioning surface and corresponds to the lower connecting through hole. The lower part of each upper positioning seat and the upper part of the corresponding lower positioning seat are detachably and fixedly installed together through a first connecting piece that passes through the upper connecting through hole and the corresponding lower connecting through hole.

3. The well workover clearance device according to claim 2, characterized in that... The front positioning assembly also includes a lower fixing seat. The lower fixing seat is fixedly installed on the front side of the fixing base. The lower fixing seat is located to the right of the rightmost lower positioning seat. Several fixing through holes are distributed circumferentially on the upper side of the lower fixing seat. After the leftmost upper positioning seat moves to the right, it can be detachably and fixedly installed together with the lower fixing seat.

4. The well workover clearance device according to claim 1, 2, or 3, characterized in that... The traction mechanism includes a drive motor, a drive sprocket, a driven sprocket, and a chain. The drive motor is mounted on the right side of the fixed base. The drive sprocket is fixedly mounted on the outer front part of the output shaft of the drive motor. The driven sprocket is rotatably mounted on the inner right side of the movable base. A left adjustment frame and a right adjustment frame are fixedly mounted on the inner side of the movable base at intervals to the left and right, corresponding to the position to the right of the driven sprocket. A left adjustment rod is provided in the left adjustment frame, and a right adjustment rod is provided in the right adjustment frame. A chain connects the left end of the left adjustment rod and the right end of the right adjustment rod. The drive sprocket and the driven sprocket are connected together through the chain drive.

5. The well workover clearance device according to claim 1, 2, or 3, characterized in that... The fixed base, corresponding to the position between the front and rear positioning components, has two parallel guide rails spaced apart on its upper side. The movable base, corresponding to the position of each guide rail, has several support rollers installed on its lower side at left and right intervals.

6. The well workover clearance device according to claim 4, characterized in that... The fixed base, corresponding to the position between the front and rear positioning components, has two parallel guide rails spaced apart on its upper side. The movable base, corresponding to the position of each guide rail, has several support rollers installed on its lower side at left and right intervals.

7. The well repair clearance device according to claim 1, 2, 3, or 6, characterized in that... Each guide rail has an upward-opening guide groove on its upper side. Each guide groove has several guide sliders that are fixedly installed on the lower side of the movable base at intervals on the left and right. Each guide slider is slidably installed in the guide groove.

8. The well repair clearance device according to claim 4, characterized in that... Each guide rail has an upward-opening guide groove on its upper side. Each guide groove has several guide sliders that are fixedly installed on the lower side of the movable base at intervals on the left and right. Each guide slider is slidably installed in the guide groove.

9. The well workover clearance device according to claim 5, characterized in that... Each guide rail has an upward-opening guide groove on its upper side. Each guide groove has several guide sliders that are fixedly installed on the lower side of the movable base at intervals on the left and right. Each guide slider is slidably installed in the guide groove.

10. A tower-type pumping unit according to any one of claims 1 to 9, characterized in that... It includes a well workover clearance device and a pumping unit body, with the lower side of the pumping unit body fixedly installed on the upper side of the movable base of the well workover clearance device.

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