Workover rig provided with pipe pushing structure and used for oil field workover

Abstract

The utility model relates to the technical field of workover rigs, in particular to a workover rig provided with a push pipe structure and used for oil field workover, the inner wall of a push plate is in threaded connection with a reciprocating lead screw, and the two sides of the outer wall of the reciprocating lead screw are rotationally connected with a fixing plate through bearings. According to the workover rig with the push pipe structure for oil field workover, the output end of the hydraulic cylinder extends out to drive the bent plate to move, so that the clamping block is driven to slide along the outer wall of the vertical rod, the transverse plate can be driven to ascend, an operator does not need to frequently overhaul equipment, and the service life of the equipment is prolonged; an output shaft of a second motor rotates to drive a first gear to rotate so as to drive a second gear to rotate, the second gear rotates to drive a rotating shaft to rotate, and the output end of an electric telescopic rod moves to drive a rear side limiting plate and a connecting rod to move so as to drive a rotating rod to rotate along a connecting point with the box body; and compared with manual adjustment of the direction of the equipment by an operator, the required time is shorter, so that the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of well workover rig technology, specifically a well workover rig with a push pipe structure for oilfield well workover. Background Technology

[0002] Well workover rigs or well cleaning rigs are the most basic and important power source for well workover and downhole operations. According to their operating structure, they are divided into two types: tracked and wheeled. When using a well workover rig, a pusher device is usually needed to push the tubing.

[0003] For example, a well workover rig with a pusher mechanism for oilfield well workover, as disclosed in announcement number "CN221096447U," automatically pushes the pipe towards the workover rig through the pusher mechanism. An automatic feeding mechanism lifts the pipe placed on an L-shaped pipe rack and places it into the pusher slot for automatic feeding. However, this well workover rig with a pusher mechanism uses an internal toothed belt to drive multiple second threaded rods. The internal toothed belt is prone to loosening, making it impossible to simultaneously drive multiple second threaded rods, resulting in frequent maintenance and reduced equipment lifespan. Furthermore, when feeding material to different positions of the workover rig, operators need to manually adjust the position of the pusher mechanism, which takes a considerable amount of time, thus reducing work efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problems of vibration caused by the internal toothed belt driving multiple second threaded rods, which makes the internal toothed belt prone to loosening and unable to drive multiple second threaded rods simultaneously. This results in frequent maintenance of the equipment, reducing its service life. In addition, the well workover rig with a push pipe structure required manual adjustment of the push pipe mechanism by the operator when feeding materials to different positions of the well workover rig, which took a long time to adjust and reduced work efficiency. Therefore, this invention proposes a well workover rig with a push pipe structure for oilfield well workover.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a well workover rig with a push pipe structure for oilfield well workover, including a housing and a base. The housing is located on top of the base, and an adjustment mechanism is located inside the housing. A lifting mechanism is located on top of the base. Fixed plates are located on both sides of the top of the housing. The bottom of each fixed plate is fixedly connected to a horizontal plate. A horizontal bar is fixedly connected to the inner wall of the horizontal plate. The outer wall of the horizontal bar is slidably connected to a push plate. The inner wall of the push plate is threadedly connected to a reciprocating screw. Both sides of the outer wall of the reciprocating screw are rotatably connected to the fixed plate through bearings.

[0007] Preferably, the right end of the reciprocating screw is fixedly connected to the output end of the first motor, and the end of the first motor is fixedly connected to the right side fixing plate.

[0008] Preferably, the adjustment mechanism includes a second motor, rollers, and an electric telescopic rod. The second motor is mounted inside the housing via a bracket. A first gear is fixedly connected to the end of the output shaft of the second motor, and the first gear meshes with the second gear. The lower end of the transmission shaft of the second gear is rotatably connected to the housing via a bearing. A rotating shaft is fixedly connected to the upper end of the transmission shaft of the second gear, and the rotating shaft is rotatably connected to the housing via a bearing. The outer wall of the electric telescopic rod is fixedly connected to the housing. The output end of the electric telescopic rod is fixedly connected to the rear limiting plate. The inner side of the limiting plate is movably connected to a connecting rod via a pin. The inner side of the connecting rod is movably connected to a rotating rod via a pin. The upper part of the rotating rod is rotatably connected to the housing via a bearing. The inner wall of the limiting plate is slidably connected to two limiting rods. Both ends of the limiting rods are fixedly connected to the housing. A horizontal plate is fixedly connected to the upper end of the rotating shaft.

[0009] Preferably, a plurality of the rollers are installed at the bottom of the horizontal plate, and the outer wall of the rollers is in contact with the box body.

[0010] Preferably, the lifting mechanism includes a hydraulic cylinder, the output end of which is fixedly connected to a curved plate, the upper end of which is fixedly connected to a housing, and both sides of the outer wall of the curved plate are fixedly connected to locking blocks, the inner walls of which are slidably connected to vertical rods, and the lower ends of which are fixedly connected to a base.

[0011] Preferably, the end of the hydraulic cylinder is fixedly connected to the base, and a slot is machined on the horizontal plate.

[0012] The present invention proposes a well workover rig with a push pipe structure for oilfield well workover. The beneficial effects are as follows: through the cooperation of the base and the lifting mechanism, the output end of the hydraulic cylinder extends and drives the bending plate to move, thereby driving the locking block to slide along the outer wall of the vertical rod, which can drive the horizontal plate to rise, so that the equipment does not need to be frequently inspected by the operator, thereby improving the service life of the equipment.

[0013] Through the cooperation of the housing and the adjustment mechanism, the output shaft of the second motor rotates, driving the first gear to rotate, which in turn drives the second gear to rotate. The rotation of the second gear drives the rotating shaft to rotate, and the output end of the electric telescopic rod moves, driving the rear limit plate and connecting rod to move. This causes the rotating rod to rotate along the connection point with the housing, which in turn drives the front limit plate and connecting rod to move. This ensures that the number of teeth on the first gear is greater than the number of teeth on the second gear, allowing for automatic adjustment of the direction of the horizontal plate. Compared to manual adjustment of the equipment direction by the operator, this takes less time and improves work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 A front sectional view;

[0016] Figure 3 for Figure 1 A partial left view;

[0017] Figure 4 for Figure 2 Top sectional view of the central adjustment mechanism;

[0018] Figure 5 for Figure 2 A top view of the lifting mechanism.

[0019] In the diagram: 1. Box body, 2. Adjustment mechanism, 201. Second motor, 202. First gear, 203. Second gear, 204. Rotating shaft, 205. Electric telescopic rod, 206. Limiting plate, 207. Connecting rod, 208. Rotating rod, 209. Limiting rod, 210. Roller, 3. Base, 4. Horizontal plate, 5. Fixing plate, 6. Horizontal bar, 7. Reciprocating screw, 8. Push plate, 9. Lifting mechanism, 901. Hydraulic cylinder, 902. Bending plate, 903. Locking block, 904. Vertical rod, 10. First motor, 11. Slot. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] See attached document Figure 1-5 In this embodiment, a well workover rig with a push pipe structure for oilfield well workover includes a housing 1 and a base 3. The housing 1 is located on top of the base 3. An adjustment mechanism 2 is located inside the housing 1. A lifting mechanism 9 is located on top of the base 3. Fixed plates 5 are located on both sides of the upper part of the housing 1. The bottom of the fixed plates 5 is fixedly connected to a horizontal plate 4. A horizontal bar 6 is fixedly connected to the inner wall of the horizontal plate 4. The outer wall of the horizontal bar 6 is slidably connected to a push plate 8. The inner wall of the push plate 8 is threadedly connected to a reciprocating screw 7. The outer walls of the reciprocating screw 7 are rotatably connected to the fixed plates 5 through bearings on both sides.

[0022] The right end of the reciprocating screw 7 is fixedly connected to the output end of the first motor 10. Both the first motor 10 and the second motor 201 are servo motors. The end of the first motor 10 is fixedly connected to the right side fixing plate 5. Multiple rollers 210 are installed at the bottom of the horizontal plate 4, and the outer wall of the rollers 210 is in contact with the housing 1.

[0023] The adjusting mechanism 2 includes a second motor 201, a roller 210, and an electric telescopic rod 205. The second motor 201 is mounted inside the housing 1 via a bracket. A first gear 202 is fixedly connected to the end of the output shaft of the second motor 201. The first gear 202 meshes with a second gear 203. The lower end of the transmission shaft of the second gear 203 is rotatably connected to the housing 1 via a bearing. A rotating shaft 204 is fixedly connected to the upper end of the transmission shaft of the second gear 203. The rotating shaft 204 is rotatably connected to the housing 1 via a bearing. The outer wall of the electric telescopic rod 205 is fixedly connected to the housing 1. The output end of the electric telescopic rod 205 is fixedly connected to the rear limiting plate 206. The inner side of the limiting plate 206 is movably connected to connecting rods 207 via pins. The inner side of rod 207 is movably connected to rotating rod 208 via pins. The upper part of rotating rod 208 is rotatably connected to housing 1 via bearings. The inner wall of limiting plate 206 is slidably connected to two limiting rods 209. Both ends of limiting rod 209 are fixedly connected to housing 1. A horizontal plate 4 is fixedly connected to the upper end of rotating shaft 204. The output shaft of second motor 201 rotates, driving first gear 202 to rotate, which in turn drives second gear 203 to rotate. The rotation of second gear 203 drives rotating shaft 204 to rotate. The output end of electric telescopic rod 205 moves, driving rear limiting plate 206 and connecting rod 207 to move, thereby driving rotating rod 208 to rotate along the connection point with housing 1, and then driving front limiting plate 206 and connecting rod 207 to move.

[0024] The lifting mechanism 9 includes a hydraulic cylinder 901. The model of the hydraulic cylinder 901 and the electric telescopic rod 205 can be selected according to actual needs to meet the work requirements. The electric telescopic rod 205 can be powered by a private battery to prevent the power cord from getting tangled when adjusting the position of the horizontal plate 4. The output end of the hydraulic cylinder 901 is fixedly connected to a bending plate 902. The upper end of the bending plate 902 is fixedly connected to the housing 1. Both sides of the outer wall of the bending plate 902 are fixedly connected to locking blocks 903. The inner walls of the locking blocks 903 are slidably connected to the vertical rod 904. The lower end of the vertical rod 904 is fixedly connected to the base 3. The end of the hydraulic cylinder 901 is fixedly connected to the base 3. The horizontal plate 4 is machined with a slot 11. The movement of the output end of the hydraulic cylinder 901 drives the bending plate 902 to move, thereby driving the locking blocks 903 to slide along the outer wall of the vertical rod 904.

[0025] Working principle:

[0026] When using a push rod structure to feed materials into a workover rig used for oilfield well workover:

[0027] Preparation process:

[0028] The operator installs the base 3 onto the corresponding platform through the threaded holes and bolts, and then the operator manually places the pipe into the slot 11 on the horizontal plate 4.

[0029] Adjustment process:

[0030] The operator first adjusts the direction of the horizontal plate 4 according to the direction of the workover rig, and starts the power supply of the second motor 201. The output shaft of the second motor 201 rotates, driving the first gear 202 to rotate, which in turn drives the second gear 203 to rotate. The rotation of the second gear 203 drives the rotating shaft 204 to rotate, which in turn drives the horizontal plate 4 to rotate, and at the same time drives the roller 210 to roll along the surface of the housing 1. When the horizontal plate 4 rotates to a direction that is convenient for pushing materials, the power supply of the second motor 201 is turned off. The output end of the electric telescopic rod 205 moves, driving the rear limit plate 206 and the connecting rod 207 to move, thereby driving the rotating rod 2 08 rotates along the connection point with the housing 1, thereby driving the front limiting plate 206 and the connecting rod 207 to move. When the inner side of the limiting plate 206 is pressed against the outer wall of the rotating shaft 204, the power supply of the electric telescopic rod 205 is turned off. The limiting plate 206 can self-lock the rotating shaft 204 to prevent the horizontal plate 204 from still moving after the second motor 201 stops working. The number of teeth of the first gear 202 is greater than the number of teeth of the second gear 203, so as to facilitate the operator to adjust the direction of the horizontal plate 4. Compared with the operator manually adjusting the direction of the equipment, the time required is shorter, thereby improving work efficiency.

[0031] Then, the operator adjusts the height of the horizontal plate 4 according to the height of the workover rig, and starts the hydraulic cylinder 901. The output end of the hydraulic cylinder 901 extends and drives the bending plate 902 to move, thereby causing the locking block 903 to slide along the outer wall of the vertical rod 904, which can drive the horizontal plate 4 to rise. When the horizontal plate 4 rises to a height that is convenient for pushing materials, the hydraulic cylinder 901 is turned off. By cooperating with the hydraulic cylinder 901 and the bending plate 902, the height of the horizontal plate 4 can be adjusted. The equipment does not need to be frequently inspected, thereby improving the service life of the equipment.

[0032] Tube pushing process:

[0033] After the horizontal plate 4 is positioned correctly, the operator starts the power supply of the first motor 10. The output shaft of the first motor 10 rotates, driving the reciprocating screw 7 to rotate, which in turn drives the push plate 8 to move to the left along the horizontal bar 6. This allows the pipeline to move to the left and enter the workover rig for subsequent oilfield workover needs. At this time, the push plate 8 moves to the left end of the reciprocating screw 7 and automatically resets. Then, through the hydraulic cylinder 901, the horizontal plate 4 is moved to a position that is convenient for the operator to add the pipeline. After that, the hydraulic cylinder 901 is closed, and the new pipeline is placed into the slot 11 on the horizontal plate 4. Then, the above-mentioned pipeline pushing process is repeated to continue the pipeline pushing work.

[0034] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An oilfield workover rig with push-tubing structure for workover, comprising a box (1) and a base (3), the box (1) is arranged above the base (3), characterized in that: The box (1) is internally provided with an adjusting mechanism (2), the base (3) is provided with a lifting mechanism (9) above, both sides of the box (1) are provided with a fixed plate (5) above, the bottom of the fixed plate (5) is fixedly connected with a horizontal plate (4), the inner wall of the horizontal plate (4) is fixedly connected with a horizontal rod (6), the outer wall of the horizontal rod (6) is slidably connected with a push plate (8), the inner wall of the push plate (8) is threadedly connected with a reciprocating screw (7), and the outer wall of the reciprocating screw (7) is rotatably connected with the fixed plate (5) through bearings on both sides.

2. The workover rig with a push-tubing structure for oilfields according to claim 1, characterized in that: The right end of the reciprocating screw (7) is fixedly connected with the output end of the first motor (10), and the end of the first motor (10) is fixedly connected with the right fixed plate (5).

3. The workover rig with a push-tubing structure for oilfields according to claim 1, characterized in that: The adjusting mechanism (2) comprises a second motor (201), a roller (210) and an electric telescopic rod (205), the second motor (201) is mounted in the box (1) through a support, the output shaft end of the second motor (201) is fixedly connected with a first gear (202), the first gear (202) is engaged with a second gear (203), the lower end of the transmission shaft of the second gear (203) is rotatably connected with the box (1) through a bearing, the upper end of the transmission shaft of the second gear (203) is fixedly connected with a rotating shaft (204), the rotating shaft (204) is rotatably connected with the box (1) through a bearing, the outer wall of the electric telescopic rod (205) is fixedly connected with the box (1), the output end of the electric telescopic rod (205) is fixedly connected with a rear limiting plate (206), the inner side of the limiting plate (206) is movably connected with a connecting rod (207) through a pin shaft, the inner side of the connecting rod (207) is movably connected with a rotating rod (208) through a pin shaft, the upper part of the rotating rod (208) is rotatably connected with the box (1) through a bearing, the inner wall of the limiting plate (206) is slidably connected with two limiting rods (209), and the two ends of the limiting rod (209) are fixedly connected with the box (1). The upper end of the rotating shaft (204) is fixedly connected with a horizontal plate (4).

4. The workover rig with a push-tubing structure for oilfields according to claim 3, characterized in that: A plurality of the rollers (210) are mounted on the bottom of the horizontal plate (4), and the outer wall of the roller (210) is in close contact with the box (1).

5. The workover rig with a push-tubing structure for oilfields according to claim 1, characterized in that: The lifting mechanism (9) comprises a hydraulic cylinder (901), the output end of the hydraulic cylinder (901) is fixedly connected with a bent plate (902), the upper end of the bent plate (902) is fixedly connected with the box (1), the outer wall of the bent plate (902) is fixedly connected with a clamping block (903) on both sides, the inner wall of the clamping block (903) is slidably connected with a vertical rod (904), and the lower end of the vertical rod (904) is fixedly connected with the base (3).

6. The workover rig with a push-tubing structure for oilfield workover according to claim 5, characterized in that: The end of the hydraulic cylinder (901) is fixedly connected with the base (3), and the horizontal plate (4) is processed with a clamping groove (11).

Images