Rear supporting leg device of special workover rig

Abstract

The utility model provides a rear supporting leg device of a special workover rig. The rear supporting leg device of the special workover rig comprises two outer square pipes and two inner square pipes, the two fixing discs are fixedly connected to the ends, opposite to each other, of the interiors of the two outer square pipes correspondingly, the other ends of the two fixing discs are fixedly connected with second hydraulic telescopic rods correspondingly, and the telescopic ends of the two second hydraulic telescopic rods are connected with the positions, close to the middles, of the interiors of the two inner square pipes through the fixing discs correspondingly; limiting strips are fixedly connected to the front faces and the back faces of the two inner square pipes correspondingly, and butt joint grooves are formed in the front faces and the back faces of the inner walls of the two outer square pipes correspondingly. According to the rear supporting leg device of the special workover rig, the outer square pipe and the inner square pipe are adopted, a small pipe is sleeved with a large pipe, the process is simplified, the cost is reduced, meanwhile, adjustment is easy and labor-saving through the hydraulic telescopic rod, pressure borne by the main supporting plate is relieved through the auxiliary contact plate, and the use safety of the workover rig is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the rear support leg technical field of workover rig, especially relates to a rear support leg device of special workover rig. BACKGROUND

[0002] The workover rig or the well drilling machine is the most basic and primary power source in the workover and downhole operation construction, and is divided into two forms of caterpillar type and tire type according to the running structure.

[0003] With the continuous development of the petroleum exploitation industry, the workover rig without cable is also continuously developed. The workover rig without cable is the common operation equipment in the oil field, and when working, the derrick at the tail of the frame is lifted, and the rear support leg of the workover rig is extended to support the road surface.

[0004] The existing rear support leg is mostly hydraulic jack support leg, and due to stress, operation, material service life and other reasons, oil leakage and pressure relief problems are often generated during use, the staff needs to add lubricating oil regularly, the labor intensity of the staff is increased, and once forgotten, the device is not used smoothly, and the work progress is affected.

[0005] Therefore, it is necessary to provide a rear support leg device of special workover rig to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0006] The utility model provides a rear support leg device of special workover rig, solve the problem that if the existing hydraulic jack support leg is not added with lubricating oil in time after being used for a period of time due to stress, operation and material problems, the device is not used smoothly, and the work progress is affected.

[0007] To solve the above technical problems, the rear support leg device of special workover rig provided by the utility model comprises two outer pipes,

[0008] Two fixed discs are fixedly connected at the opposite ends in the interiors of the two outer pipes respectively, second hydraulic telescopic rods are fixedly connected at the other ends of the two fixed discs, the telescopic ends of the two second hydraulic telescopic rods are connected through the fixed discs and the positions close to the middle in the interiors of the two inner pipes, limit strips are fixedly connected to the front and back surfaces of the two inner pipes, and butt grooves are formed in the front and back surfaces of the inner walls of the two outer pipes.

[0009] Two connecting blocks are fixedly connected at the opposite ends of the two inner pipes respectively, first hydraulic telescopic rods are installed at the top of the two connecting blocks, connecting discs are fixedly connected to the telescopic ends of the two first hydraulic telescopic rods, limit racks are fixedly connected to the bottoms of the connecting discs, pulleys are rotatably connected to the front and back surfaces of the limit racks, and contact plates are slidably connected to the outer surfaces of the two limit racks through sliding grooves.

[0010] The limiting strip slides in the butt joint groove, the inner square tube slides in the outer square tube, the limiting frame is an I-shaped, the pulley can reduce the friction of the limiting frame sliding in the sliding groove, and the sliding groove and the limiting frame are in corresponding shapes.

[0011] Preferably, the top of the two outer square tubes is provided with an oil supply device, and the opposite end of the two outer square tubes is fixedly connected with a supporting assembly.

[0012] The oil supply device can provide the first hydraulic telescopic rod and the second hydraulic telescopic rod with the required hydraulic oil.

[0013] Preferably, the top of the fixed plate is threaded and penetrates the adjusting screw, and the bottom end of the adjusting screw is rotatably connected with the contact disc through the rotating ring.

[0014] After the contact plate contacts the ground, the position of the contact disc is adjusted through the adjusting screw.

[0015] Preferably, the front surface of the oil supply device is provided with a control box, and the front surface of the control box is rotatably connected with a box door.

[0016] The control box is internally provided with a control switch and a controller for controlling the operation of the equipment.

[0017] Preferably, the opposite end of the two outer square tubes and the inner square tube is provided with an opening, and the bottom of the contact plate is provided with a buffer assembly.

[0018] The buffer assembly is located between the contact plate and the ground.

[0019] Preferably, the buffer assembly comprises a bottom plate, and the top of the bottom plate is provided with a buffer spring near four corners through a supporting disc.

[0020] The top end of the buffer spring is in contact with the bottom of the contact plate through the supporting disc.

[0021] Compared with the related art, the rear leg device of the special workover rig has the following advantages

[0022] Advantages:

[0023] This utility model provides a rear outrigger device for a dedicated well workover rig. To facilitate the use and ensure the safety of the rear outrigger, two inner square tubes are installed inside the two outer square tubes at the telescopic ends of the second hydraulic telescopic rods. The extension and retraction of the second hydraulic telescopic rods can adjust the length of the inner square tube extending from one end of the outer square tube. The limiting strip on the outer surface of the inner square tube and the mating groove on the inner surface of the outer square tube are connected, thereby increasing the stability of the inner square tube's movement. Then, the two first hydraulic telescopic rods are installed on the connecting blocks at one end of the two inner square tubes, and the telescopic ends of the two first hydraulic telescopic rods are connected by a limiting frame with pulleys and a sliding groove on the top of the contact plate. This design uses a large outer square tube and a small inner square tube, which simplifies the process and reduces costs. At the same time, the adjustment via the hydraulic telescopic rods is easy and labor-saving, and the auxiliary contact plate reduces the pressure on the main support plate, improving the safety of the well workover rig. Attached Figure Description

[0024] Figure 1 A schematic diagram of a preferred embodiment of the rear outrigger device of the special well workover rig provided by this utility model;

[0025] Figure 2 A schematic diagram of the outer square tube is provided for this utility model;

[0026] Figure 3 Provided for this utility model Figure 2 An enlarged view of point A shown;

[0027] Figure 4 Provided for this utility model Figure 2 An enlarged view of point B shown;

[0028] Figure 5 Provided for this utility model Figure 2 A magnified view of point C shown.

[0029] The following are the labels in the diagram: 1. Outer square tube, 2. First hydraulic telescopic rod, 3. Connecting block, 4. Slide groove, 5. Buffer assembly, 501. Base plate, 502. Support plate, 503. Buffer spring, 6. Contact plate, 7. Inner square tube, 8. Support assembly, 801. Fixing plate, 802. Adjusting screw, 803. Contact plate, 804. Rotating ring, 9. Box door, 10. Control box, 11. Oil supply equipment, 12. Limiting strip, 13. Second hydraulic telescopic rod, 14. Fixing plate, 15. Pulley, 16. Limiting frame, 17. Connecting plate, 18. Docking groove. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Please refer to the following: Figure 1 , Figure 2 , Figure 3 ,Figure 4 and Figure 5 wherein, Figure 1 Structure diagram of a preferred embodiment of the rear support leg device of the special workover rig provided by the present application is shown in the figure; Figure 2 Structure diagram of the outer pipe provided by the present application is shown in the figure; Figure 3 Structure diagram of the special workover rig provided by the present application is shown in the figure Figure 2 Enlarged view of position A shown in the figure;

[0032] Figure 4 Structure diagram of the special workover rig provided by the present application is shown in the figure Figure 2 Enlarged view of position B shown in the figure; Figure 5 Structure diagram of the special workover rig provided by the present application is shown in the figure Figure 2 Enlarged view of position C shown in the figure. The rear support leg device of the special workover rig comprises two outer square pipes 1;

[0033] Two fixed discs 14 are fixedly connected to the opposite ends inside the two outer square pipes 1 respectively, and the other ends of the two fixed discs 14 are fixedly connected with second hydraulic telescopic rods 13, the telescopic ends of the two second hydraulic telescopic rods 13 are connected through the fixed discs 14 and the positions inside the two inner square pipes 7 close to the middle, the front and back surfaces of the two inner square pipes 7 are fixedly connected with limiting strips 12, and the front and back surfaces of the inner walls of the two outer square pipes 1 are provided with butt joints 18;

[0034] Two connecting blocks 3 are fixedly connected to the opposite ends of the two inner square pipes 7 respectively, and the top portions of the two connecting blocks 3 are provided with first hydraulic telescopic rods 2, the telescopic ends of the two first hydraulic telescopic rods 2 are fixedly connected with connecting discs 17, the bottom portions of the connecting discs 17 are fixedly connected with limiting racks 16, the front and back surfaces of the limiting racks 16 are rotatably connected with pulleys 15, and the outer surfaces of the two limiting racks 16 are slidingly connected with contact plates 6 through sliding grooves 4;

[0035] The limiting strips 12 slide inside the butt joints 18, the inner square pipes 7 slide inside the outer square pipes 1, the limiting racks 16 are I-shaped, the pulleys 15 can reduce the friction of the limiting racks 16 sliding in the sliding grooves 4, the shapes of the sliding grooves 4 and the limiting racks 16 correspond to each other, and the outer square pipes 1 and the inner square pipes 7 are all hollow square pipes and are made of high-strength steel.

[0036] The top portions of the two outer square pipes 1 are provided with oil supply equipment 11, and the opposite ends of the two outer square pipes 1 are fixedly connected with support assemblies 8, and the support assemblies 8 comprise fixed plates 801;

[0037] The oil supply equipment 11 can provide the first hydraulic telescopic rods 2 and the second hydraulic telescopic rods 13 with hydraulic oil required for work, and the fixed plates 801 are located at the ends of the outer square pipes 1 without openings.

[0038] The top of the fixing plate 801 is threaded through an adjusting screw 802, and the bottom end of the adjusting screw 802 is rotationally connected with a contact disc 803 through a rotating ring 804.

[0039] After the contact plate 6 contacts the ground, the position of the contact disc 803 is adjusted through the adjusting screw 802, so that the safety of the rear leg working can be increased.

[0040] The front surface of the oil supply device 11 is provided with a control box 10, and the front surface of the control box 10 is rotationally connected with a box door 9.

[0041] The box door 9 is provided with a lock, and the inside of the control box 10 is provided with a control switch and a controller for controlling the operation of the equipment.

[0042] The opposite ends of the two outer square tubes 1 and the inner square tubes 7 are both provided with openings, and the bottom of the contact plate 6 is provided with a buffer assembly 5.

[0043] The buffer assembly 5 is located between the contact plate 6 and the ground and plays a buffering role.

[0044] The buffer assembly 5 comprises a bottom plate 501, and the top of the bottom plate 501 is provided with a buffer spring 503 through a supporting disc 502 at positions close to four corners.

[0045] The top end of the buffer spring 503 is in contact with the bottom of the contact plate 6 through the supporting disc 502.

[0046] The working principle of the rear leg device of the special workover rig is as follows:

[0047] The two inner square tubes 7 are installed at the telescopic ends of the second hydraulic telescopic rods 13 inside the two outer square tubes 1, and the length of the inner square tubes 7 extending from one end of the outer square tubes 1 can be adjusted through the telescoping of the second hydraulic telescopic rods 13, and the limiting strips 12 on the outer surfaces of the inner square tubes 7 and the butt joint grooves 18 on the inner surfaces of the outer square tubes 1 are butted, so that the stability of the movement of the inner square tubes 7 is increased, and then the two first hydraulic telescopic rods 2 are respectively installed on the connecting blocks 3 at one end of the two inner square tubes 7, and the limiting racks 16 with pulleys 15 and the sliding grooves 4 at the top of the contact plate 6 are connected, in actual use, the two second hydraulic telescopic rods 13 are started to push the two inner square tubes 7 to extend from one end of the outer square tubes 1 to a corresponding length, and in this process, the limiting rack 16 slides in the sliding groove 4 through the pulley 15, then the two first hydraulic telescopic rods 2 are started to push the contact plate 6 to move downward and contact the ground, and the support of the workover rig is completed, and when it is needed to be folded, it only needs to be operated in the opposite direction once to fold the contact plate 6 to a position where the contact plate 6 contacts the bottoms of the two outer square tubes 1.

[0048] Compared with the related art, the rear leg device of the special workover rig has the following advantages

[0049] Advantages:

[0050] In order to facilitate the use and safety of the rear legs of the workover rig, two inner square tubes 7 are installed inside the extension end of the second hydraulic telescopic rod 13 of the two outer square tubes 1, the length of the inner square tube 7 extending from one end of the outer square tube 1 can be adjusted through the extension of the second hydraulic telescopic rod 13, and the limiting strip 12 on the outer surface of the inner square tube 7 is butted against the butt joint groove 18 on the inner surface of the outer square tube 1, thereby increasing the stability of the movement of the inner square tube 7, then only the two first hydraulic telescopic rods 2 are installed on the connecting blocks 3 at one end of the two inner square tubes 7, and the limiting frame 16 with the pulley 15 is connected to the sliding groove 4 on the top of the auxiliary contact plate 6 at the extension end of the two first hydraulic telescopic rods 2, the design adopts the large tube covering the small tube of the outer square tube 1 and the inner square tube 7, the process is simplified, the cost is reduced, the adjustment through the hydraulic telescopic rod is easy and labor-saving, the pressure on the main support plate is reduced through the auxiliary contact plate 6, and the use safety of the workover truck is improved.

[0051] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process conversion or direct or indirect application in other related technical fields by using the content of the present application specification and drawings are also included in the patent protection range of the present application.

Claims

1. A rear leg device of a special workover rig, characterized in that, Include: Two outer square tubes; Two fixed discs, two said fixed discs are fixedly connected at the opposite ends inside two outer square tubes respectively, the other end of two said fixed discs is fixedly connected with second hydraulic telescopic rod, the telescopic end of two said second hydraulic telescopic rod is connected through fixed disc and two inner square tubes inside near the middle position, the front and back of two said inner square tubes are fixedly connected with limiting strip, the front and back of two said outer square tube inner wall are provided with butt joint groove; Two connecting blocks, two said connecting blocks are fixedly connected at the opposite ends of two inner square tubes respectively, the top of two said connecting blocks is mounted with first hydraulic telescopic rod, the telescopic end of two said first hydraulic telescopic rod is fixedly connected with connecting disc, the bottom of said connecting disc is fixedly connected with limiting frame, the front and back of said limiting frame are rotatably connected with pulley, the outer surface of two said limiting frame is slidably connected with contact plate through sliding groove.

2. The rear leg apparatus of a specialized workover rig as defined in claim 1 wherein, The top of two said outer square tubes is mounted with oil supply equipment, the opposite end of two said outer square tubes is fixedly connected with support assembly, said support assembly contains fixed plate.

3. The rear leg apparatus of a specialized workover rig as defined in claim 2 wherein, The top of said fixed plate is screwed through adjusting screw, the bottom end of said adjusting screw is rotatably connected with contact disc through rotating ring.

4. The rear leg apparatus of a specialized workover rig as defined in claim 2 wherein, The front of said oil supply equipment is mounted with control box, the front of said control box is rotatably connected with box door.

5. The rear leg apparatus of a specialized workover rig as defined in claim 1 wherein, The opposite end of two said outer square tube and inner square tube is provided with opening, the bottom of said contact plate is mounted with buffer assembly.

6. The rear leg apparatus of a specialized workover rig as defined in claim 5 wherein, Said buffer assembly contains bottom plate, the top of said bottom plate is mounted with buffer spring through support disc near four corners.

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