workover rig

Abstract

This utility model proposes a workover rig, including a workover rig body and a derrick. A support shaft is vertically mounted at the bottom of the mounting platform, and the support shaft is rotatably mounted within a mounting base. Both sides of the mounting base are rotatably connected to a support frame. The bottom of the support frame is located at the rear of the workover rig body. A drive device for rotating the support shaft is located at the bottom of the mounting base. A telescopic mechanism for tilting the support shaft is located on the side of the mounting base near the head of the workover rig body. In the initial state, the telescopic mechanism drives the derrick to rest on the workover rig body. In use, whether disassembling or adding drill pipe, the drill pipe can be hoisted by rotating and tilting the derrick. The drill pipe can be transported to the side of the well or hoisted above the well. The operation is simple and convenient. Therefore, the workover rig proposed in this application can not only hoist drill pipes but also move and place them to the side of the well.

Description

Technical Field

[0001] This utility model relates to the field of well workover machine technology, specifically to well workover machines. Background Technology

[0002] As the core power source for downhole operations, workover rigs utilize a wire rope drive system to perform suspension and tripping operations, while also being equipped with a rotary table to drive the drilling tools and fulfill drilling and milling process requirements. Their structures are available in two forms: tracked (suitable for complex terrain) and wheeled (facilitating rapid relocation), with the latter featuring its own derrick for quick movement.

[0003] Currently, well workover rigs require additional machinery to lift the drill pipe during operation—that is, to transport and raise the drill pipe to the required height for easy installation or removal. This equipment is expensive and requires specialized personnel to operate. Therefore, we propose a new well workover rig that can lift drill pipes like a crane, solving the problems of existing technology. Utility Model Content

[0004] This utility model provides a well workover rig that has the advantages of both hoisting drill pipes and transporting them to other locations, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: a workover rig includes a workover rig body and a derrick. The bottom of the derrick is installed on an installation platform. A support shaft is vertically provided at the bottom of the installation platform. The support shaft is rotatably mounted in the installation seat. The two sides of the installation seat are rotatably connected to the support frame. The bottom of the support frame is located at the rear of the workover rig body. A drive device for driving the support shaft to rotate is provided at the bottom of the installation seat. A telescopic mechanism for driving the support shaft to tilt is provided on the side of the installation seat near the head of the workover rig body. In the initial state, the telescopic mechanism drives the derrick to be placed on the workover rig body. In use, the telescopic mechanism drives the derrick to be erected.

[0006] Preferably, a hoisting device is installed on the side of the derrick, and the ropes on the hoisting device are set in the guide wheel at the top of the derrick.

[0007] Preferably, the workover rig body is provided with brackets on both sides near its head position, and the top of each of the two brackets is provided with a placement slot. When the rig is placed on the workover rig body, the two sides of the rig are placed in the placement slot.

[0008] Preferably, at least one support arm is rotatably provided on both sides of the workover machine body, and a first hydraulic cylinder is vertically installed at the end of the support arm, with a support seat at the bottom of the first hydraulic cylinder.

[0009] Preferably, the end of the workover rig body away from its head is perpendicular to the second hydraulic cylinder, and a support plate is provided at the bottom of the second hydraulic cylinder.

[0010] Preferably, the drive device includes a support mounted on one side of the mounting base, a rotary motor mounted on the top of the support, and rotary gears mounted on the bottom of the rotary motor and the bottom of the support shaft, with the two rotary gears meshing.

[0011] Preferably, the telescopic mechanism includes an L-shaped frame mounted on the side of the mounting base. At least one lifting hydraulic cylinder is rotatably mounted on the side of the L-shaped frame near the head of the workover machine vehicle. The lifting hydraulic cylinder is tilted and its bottom is rotatably mounted on the workover machine vehicle.

[0012] Compared with existing technologies, this utility model allows for easy operation of drill pipes during both disassembly and installation. The drill pipes can be lifted by rotating and tilting the derrick, either moving them to the side of the well or hoisting them above the well. The operation is simple and convenient. Therefore, the workover rig proposed in this application can not only lift drill pipes but also move them to the side of the well. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural schematic diagram of one side of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure on the other side of this utility model.

[0016] Figure 3 This is a schematic diagram of the specific installation of the derrick of this utility model.

[0017] Figure 4 This is the main view of the present utility model. Figure 1 .

[0018] Figure 5 This is the main view of the present utility model. Figure 2 .

[0019] In the diagram: 1. Workover rig body; 2. Placement slot; 3. Bracket; 4. Electrical control cabinet; 5. Hydraulic control station; 6. Lifting device; 7. Derrick; 8. First hydraulic cylinder; 9. Support arm; 10. Lifting hydraulic cylinder; 11. Mounting shaft; 12. Support frame; 13. Second hydraulic cylinder; 14. Guide shaft; 15. L-shaped frame; 16. Mounting platform; 17. Rotary motor; 18. Mounting seat; 19. Rotary gear; 20. Support bracket; 21. Support shaft. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Reference Figures 1 to 5 This utility model provides a technical solution: a workover rig, including a workover rig body 1, with at least one support arm 9 rotatably mounted on both sides of the workover rig body 1, and a first hydraulic cylinder 8 vertically mounted at the end of each support arm 9. A support plate is provided at the bottom of the first hydraulic cylinder 8. Figure 1 and Figure 2 As shown, when the workover rig body 1 stops at the preset position, the first hydraulic cylinder 8 can be deployed around the vehicle via the outrigger 9, and then the first hydraulic cylinder 8 extends to drive the support plate to be placed on the ground. It should be noted that, as Figure 1 and Figure 2 As shown, the well workover rig body 1 has a derrick 7 at its rear, so the rear has a large load capacity. To increase the load capacity of the rear and prevent the rear from settling, as follows: Figure 1 As shown, a second hydraulic cylinder 13 is vertically positioned at the end of the workover rig body 1 furthest from its head, and a support base is provided at the bottom of the second hydraulic cylinder 13. In actual use, the length of the support base is approximately the same as the width of the rig, which increases the contact area between the support base and the ground. To prevent the support base from deforming, at least one guide shaft 14 is vertically provided at the top of the support base. The top of the guide shaft 14 is movably connected to the workover rig body 1, and the guide shaft 14 provides support for the support base. The derrick 7 in this application is the same as the actual derrick and has not been modified in any way. The actual derrick 7 comes in two types: telescopic and non-telescopic, both of which can be used in this solution. Figure 3 As shown, during the installation of the derrick, the bottom of the derrick 7 is mounted on the mounting platform 16. A support shaft 21 is vertically mounted on the bottom of the mounting platform 16. The support shaft 21 is rotatably mounted within the mounting base 18. Both sides of the mounting base 18 are rotatably connected to the support frame 12, as shown. Figure 1 and Figure 3 As shown, mounting shafts 11 are specifically provided on both sides of the mounting base 18, and the mounting shafts 11 are installed inside the top of the support frame 12, with the bottom of the support frame 12 located at the rear of the workover rig body 1. Therefore, the derrick 7 can rotate within the mounting base 18 via the support shafts 21, and the derrick 7 can also rotate around the support shafts 21. To ensure the smooth rotation of the derrick 7, a drive device for rotating the support shaft 21 is provided at the bottom of the mounting base 18. The drive device includes a support 20 mounted on one side of the mounting base 18, and a rotary motor 17 is mounted on the top of the support 20. The rotary motor 17 is hydraulically driven. Rotary gears 19 are mounted on the bottom of the rotary motor 17 and the bottom of the support shaft 21. The two rotary gears 19 mesh. It should be emphasized that the rotary gear 19 on the support shaft 21 is larger than the rotary gear 19 on the rotary motor 17, and there is at least one set of rotary gears 19. When the rotary motor 17 rotates, it can drive the support shaft 21 to rotate. The rotary motor 17 has a large driving force, which can drive the derrick 7 to rotate smoothly.

[0022] In practical use, such as Figure 5 As shown, when not in use, the derrick 7 should be placed on the workover rig body 1. If the derrick 7 is telescopic, it should be retracted to its shortest length. Figure 1 As shown, brackets 3 are provided on both sides of the workover rig body 1 near its head. Each bracket 3 has a placement slot 2 on its opposite side. When the derrick 7 is placed on the workover rig body 1, both sides of the derrick 7 are placed in the placement slots 2. It should also be noted that the distance between the two brackets 3 is sufficiently large relative to the derrick 7 because a lifting device 6, such as a crane or hoist, is installed on the side of the derrick 7. The lifting device 6 is positioned below the derrick 7, ensuring a lower center of gravity for the derrick 7. The derrick 7 has high structural strength and can stably support the lifting device 6. The ropes on the lifting device 6 are located inside guide wheels at the top of the derrick 7, and the ends of the ropes are equipped with lifting devices that match the drill pipe. In order to keep the derrick 7 stable during tilt adjustment, a telescopic mechanism for tilting the drive support shaft 21 is provided on the side of the mounting base 18 near the head of the workover machine body 1. So in the initial state, the telescopic mechanism drives the derrick 7 to be placed on the workover machine body 1. When in use, the telescopic mechanism drives the derrick 7 to be erected. like Figure 2 and Figure 4 As shown, the telescopic mechanism includes an L-shaped frame 15 mounted on the side of the mounting base 18. At least one lifting hydraulic cylinder 10 is rotatably mounted on the side of the L-shaped frame 15 closest to the head of the workover rig body 1. The lifting hydraulic cylinder 10 is inclined and its bottom is rotatably mounted on the workover rig body 1. In actual use, the number of lifting hydraulic cylinders 10 is at least two and symmetrically distributed on both sides of the L-shaped frame 15, such as... Figure 4 As shown, when the lifting hydraulic cylinder 10 extends or retracts, the lifting hydraulic cylinder 10 drives the derrick 7 to tilt left and right via the L-shaped frame 15. Figure 5 As shown, after the derrick 7 is placed on the workover machine body 1, the hoisting device 6 does not contact the equipment on the workover machine body 1, that is, the workover machine body 1 has a space corresponding to the hoisting device 6.

[0023] Based on the above embodiments, it should be further explained that the workover rig body 1 also needs to be equipped with the necessary equipment for the workover rig, such as the electrical control cabinet 4, the hydraulic control station 5, the control room, and the turntable located at the rear of the vehicle for driving the drill pipe to rotate, etc. This part is a necessary equipment for the workover rig and will not be described in detail here. The hydraulic control station 5 is connected to each hydraulic cylinder through oil pipes.

[0024] Based on the above embodiments, it should be further explained that at least two outriggers 9 are distributed at the rear of the vehicle. In this way, the outriggers 9 cooperate with the second hydraulic cylinder 13 to keep the rear of the vehicle stable, and at the same time keep the derrick 7 stable when it is lifted. When not in use, the outriggers 9 can be rotated to both sides of the workover rig vehicle body 1 and then fixed by pins.

[0025] Based on the above embodiments, it should be further explained that the power supply or oil supply to the rotary motor 17 and the hoisting device 6 can be achieved through a slip ring, which can be set on the support shaft 21.

[0026] Based on the above embodiments, further optimization can be achieved by providing a measuring device for monitoring the rotation angle of the mounting shaft 11 and the support shaft 21 at their ends, so as to facilitate their control.

[0027] In summary, when this application is in use, the workover rig body 1 is stopped at a preset position, and then the lifting hydraulic cylinder 10 is controlled to lift the derrick 7 so that the lifting tool is above the drill pipe. In this way, the lifting and lowering of the lifting tool can be controlled so that the lifting tool can lift the drill pipe. After the lifting device lifts the drill pipe, the derrick 7 can rotate under the drive of the rotary motor 17, allowing the drill pipe to be transported elsewhere. Therefore, whether disassembling or installing drill pipe, the drill pipe can be lifted by rotating and tilting the derrick 7. The drill pipe can be transported to the side of the well or lifted above the well, making the operation simple and convenient.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A workover rig, comprising a workover rig body (1) and a derrick (7), characterized in that, The bottom of the derrick (7) is installed on the installation platform (16). The bottom of the installation platform (16) is vertically provided with a support shaft (21). The support shaft (21) is rotatably installed in the installation seat (18). The two sides of the installation seat (18) are rotatably connected to the support frame (12). The bottom of the support frame (12) is located at the rear of the workover machine vehicle body (1). The bottom of the mounting base (18) is provided with a drive device for rotating the support shaft (21); and, A telescopic mechanism with an inclined drive support shaft (21) is provided on the side of the mounting base (18) near the head of the workover machine body (1). In the initial state, the telescopic mechanism drives the derrick (7) to be placed on the workover machine body (1). When in use, the telescopic mechanism drives the derrick (7) to be erected.

2. The well workover machine as described in claim 1, characterized in that, A hoisting device (6) is installed on the side of the derrick (7), and the rope on the hoisting device (6) is set in the guide wheel at the top of the derrick (7).

3. The well workover machine as described in claim 1, characterized in that, The workover machine body (1) is provided with brackets (3) on both sides near its head. The top of the two brackets (3) on opposite sides is provided with a placement slot (2). When the derrick (7) is placed on the workover machine body (1), the two sides of the derrick (7) are placed in the placement slot (2).

4. The well workover machine as described in claim 1, characterized in that, The well repair machine body (1) is equipped with at least one support arm (9) on both sides, and a first hydraulic cylinder (8) is vertically installed at the end of the support arm (9). The bottom of the first hydraulic cylinder (8) is provided with a support seat.

5. The well workover machine as described in claim 4, characterized in that, The end of the workover machine body (1) away from its head is perpendicular to the second hydraulic cylinder (13), and the bottom of the second hydraulic cylinder (13) is provided with a support plate.

6. The well workover rig as described in any one of claims 1-5, characterized in that, The drive unit includes a support (20) mounted on one side of the mounting base (18), a rotary motor (17) mounted on the top of the support (20), and rotary gears (19) mounted on the bottom of the rotary motor (17) and the bottom of the support shaft (21), with the two rotary gears (19) meshing.

7. The well workover machine as described in claim 6, characterized in that, The telescopic mechanism includes an L-shaped frame (15) mounted on the side of the mounting base (18). The L-shaped frame (15) is rotatably equipped with at least one lifting hydraulic cylinder (10) on the side near the head of the workover machine vehicle body (1). The lifting hydraulic cylinder (10) is tilted and its bottom is rotatably mounted on the workover machine vehicle body (1).

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