Oil field well washing and workover rig

Abstract

The invention belongs to the technical field of well washing and workover operation equipment, and particularly relates to an oil field well washing and workover rig which comprises a vehicle body, a support arranged on the vehicle body, a well workover device and a well washing device, the well workover device and the well washing device are arranged on the support, a lifting mechanism is arranged on the surface of the support, and a mounting shell is mounted on one side of the upper surface of the vehicle body; a controller is mounted on the outer surface of the mounting shell, a water tank is mounted on the upper surface, close to the mounting shell, of the vehicle body, two water inlet pipes with valves fixedly communicate with the surface of the water tank, water suction pumps are arranged on the surfaces of the two water inlet pipes, and two water suction pumps are arranged on the upper surface, close to the water suction pumps, of the vehicle body. The water suction ends of the two water pumps fixedly communicate with water outlet pipes. According to the oil field well washing and workover rig, by arranging the well washing device, the two water inlet pipes and the two water outlet pipes, the washing efficiency is improved, through a rotating motor and a servo motor, a spray head enters an oil well, the spray head can be close to the side wall of the oil well, and therefore the washing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of well flushing and workover equipment, and in particular to an oilfield well flushing and workover machine. Background Art

[0002] Well flushing machines and well repairing machines are used in oil field development projects. Since well repairing machines and well flushing machines are two special equipment commonly used in oil fields, which are used for well repairing and well cleaning operations on oil wells respectively, it takes more time to use the two equipment alternately, resulting in low overall work efficiency and high cost.

[0003] At the same time, most of the current well washing machines are only equipped with one water inlet pipe and one water outlet pipe. If the pipe is abnormal, it will not only easily affect the efficiency of the well washing operation, but also require maintenance of the pipe, thereby increasing the working cost. In addition, the height of the derrick is mostly fixed, which is inconvenient for storage. Summary of the invention

[0004] Based on the above-mentioned existing technical problems, the present invention proposes an oilfield well washing and workover machine.

[0005] The present invention proposes an oilfield well washing and repairing machine, comprising a vehicle body, a bracket arranged on the vehicle body, and a well repairing device and a well washing device arranged on the bracket, the surface of the bracket is provided with a lifting mechanism, a mounting shell is installed on one side of the upper surface of the vehicle body, a controller is installed on the outer surface of the mounting shell, a water tank is installed on the upper surface of the vehicle body close to the mounting shell, two water inlet pipes with valves are fixedly connected to the surface of the water tank, and water suction pumps are arranged on the surfaces of the two water inlet pipes, and two water pumps are respectively arranged on the upper surface of the vehicle body close to the water suction pump, and the water suction ends of the two water pumps are fixedly connected to water outlet pipes.

[0006] Wherein, the lifting mechanism includes a screw rod, and the rotation of the screw rod drives the well repairing device and the well washing device to move up and down.

[0007] Wherein, the well repair device includes a drill pipe used for performing well repair operations on the oil well.

[0008] Wherein, the well flushing device includes nozzles distributed in a ring array for flushing the oil well.

[0009] Preferably, the lifting mechanism also includes a driving motor fixedly mounted on the upper surface of the bracket, both ends of the screw are mounted on the inner surface of the bracket through bearings, one end of the output shaft of the driving motor is fixedly sleeved with the upper end of the screw, sliding grooves are penetrated through the two side surfaces of the bracket, a moving seat is threadedly sleeved on the outer surface of the screw, and the surface of the moving seat is slidably engaged with the inner wall of the sliding groove.

[0010] By adopting the above technical solution, the output shaft of the driving motor is driven to rotate to drive the screw connected thereto to rotate, and the rotation of the screw drives the moving block connected thereto to move on the screw along the inner wall of the slide groove.

[0011] Preferably, the inner wall of the movable seat is respectively fixedly sleeved with a first set of rods and a second set of rods, and one side of the upper surface of the vehicle body is hinged to the lower surface of one side of the bracket through a hinge shaft.

[0012] By adopting the above technical solution, when not in use, the bracket can be laid down for easy driving; the movement of the moving block drives the first set of rods and the second set of rods to move.

[0013] Preferably, the well repair device further comprises a support plate fixedly connected to the lower end of the first sleeve rod, the upper surface of the support plate is fixedly connected to the lower surface of the movable seat via a connecting plate, and the drill rod is mounted on the inner wall of the first sleeve rod via a bearing.

[0014] By adopting the above technical solution, the movement of the moving seat drives the support plate to move synchronously through the connecting plate, thereby enhancing the movement stability of the support plate.

[0015] Preferably, a driving gear and a driven gear are respectively installed on the lower surface of the support plate through bearings, the driving gear is meshed with the driven gear, a stepper motor is fixedly installed on the upper surface of the support plate, one end of the output shaft of the stepper motor is fixedly sleeved with the axis of the driving gear, a hydraulic chuck is fixedly installed on the lower surface of the driven gear, and the lower end of the drill rod passes through the support plate and is fixedly connected to the axis of the driven gear.

[0016] By adopting the above technical solution, the driving gear connected to the stepper motor is driven to rotate by the rotation of the output shaft thereof, the driving gear is driven to rotate by the rotation of the driven gear meshing with the stepper motor, the driven gear is driven to rotate by the rotation of the hydraulic chuck and the drill rod connected thereto, in order to facilitate drilling, the drill bit is connected to the hydraulic chuck, and in order to extend the length of the drill rod, the drill rod with the drill bit is connected to the hydraulic chuck.

[0017] Preferably, the well washing device also includes side plates symmetrically installed on one side of the outer surface of the second sleeve rod, a connecting gear is installed between the two side plates through a bearing, a rotating motor is fixedly installed on one side surface of one of the side plates, one end of the output shaft of the rotating motor is fixedly sleeved with the axis of the connecting gear, a connecting pipe is provided on the inner wall of the second sleeve rod, a first rack is fixedly installed on one side of the outer surface of the connecting pipe, the connecting gear is meshed with the first rack, a limiting groove is provided on the inner wall of the first sleeve rod, a limiting strip is fixedly connected to the other side of the outer surface of the connecting pipe, and the surface of the limiting strip is slidably engaged with the inner wall of the limiting groove.

[0018] By adopting the above technical solution, the rotation of the output shaft of the rotating motor drives the connecting gear connected to it to rotate, the rotation of the connecting gear drives the first rack meshing with it to move, the movement of the first rack drives the connecting pipe connected to it to move up and down, and the movement of the connecting pipe is limited by the limit bar and the limit groove.

[0019] Preferably, the upper end of the connecting pipe is fixedly connected to a first folding pipe, a boosting pump is fixedly installed on one side of the upper surface of the movable seat, a water pipe is fixedly connected between the water inlet of the boosting pump and the water outlet of the water suction pump, and the water outlet of the boosting pump is fixedly connected to the first folding pipe.

[0020] By adopting the above technical solution, the water in the water tank can be easily introduced into the connecting pipe through the booster pump, and the arrangement of the folding pipe facilitates the movement of the connecting pipe.

[0021] Preferably, a fixed plate is fixedly installed on the lower surface of the connecting tube, a spur gear is installed inside the fixed plate through a bearing, a servo motor is fixedly installed on the upper surface of the fixed plate, one end of the output shaft of the servo motor is fixedly sleeved with the axis of the spur gear, and the inner wall of the fixed plate is provided with second racks distributed in a circular array, and four of the second racks are meshed with the spur gear.

[0022] By adopting the above technical solution, the rotation of the servo motor output shaft drives the spur gear connected thereto to rotate, and the rotation of the spur gear drives the second rack meshing therewith to move.

[0023] Preferably, an L-shaped plate is fixedly installed on the surface of the second rack, a T-shaped plate is fixedly connected to the upper surface of the L-shaped plate, the outer surface of the fixed plate is provided with perforations distributed in a circular array, and the surfaces of the L-shaped plate and the T-shaped plate are slidably engaged with the inner walls of the perforations.

[0024] By adopting the above technical solution, the movement of the second rack drives the L-shaped plate and the T-shaped plate connected thereto to move along the perforated inner wall.

[0025] Preferably, connecting rods are symmetrically installed on the upper surface of the T-shaped plate, and the outer surface of the lower end of the connecting tube is connected to a second folded tube in a circular array, one end of the second folded tube is fixedly connected to the nozzle, and the upper ends of the two connecting rods are fixedly connected to the outer surface of the second folded tube.

[0026] By adopting the above technical solution, the movement of the T-shaped plate drives the connecting rod to move, and the movement of the connecting rod drives the second folding tube to expand and contract, thereby driving the nozzle to move.

[0027] The beneficial effects of the present invention are:

[0028] 1. By setting up a well repair device, when the screw rotates to drive the first set of rods and the second set of rods to move, the drill rod is brought close to the oil well, and the rotation of the stepper motor output shaft drives the drill rod to rotate, so that it rotates at the wellhead for drilling. At the same time, the drill rod can be pushed deeper into the oil well under the action of the hydraulic chuck, thereby improving the well repair efficiency; at the same time, the casing damaged well can be repaired by side drilling the original well, which greatly reduces the mining cost, develops the remaining oil and gas resources, and achieves the beneficial effect of increasing the production and efficiency of old oil wells.

[0029] 2. The flushing efficiency is improved by setting up a well-washing device, two water inlet pipes and two water outlet pipes, and the nozzle is allowed to enter the oil well and approach the side wall of the oil well by rotating the motor and the servo motor, thereby improving the flushing efficiency.

[0030] 3. By configuring the well-washing device and the well-repairing device as an integrated device, the well-washing machine and the well-repairing machine are avoided from operating separately, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of an oilfield well-washing and workover machine proposed by the present invention;

[0032] Figure 2 A three-dimensional diagram of the support structure of an oilfield well-washing and workover machine proposed by the present invention;

[0033] Figure 3 A three-dimensional diagram of the screw structure of an oilfield well-washing and workover machine proposed by the present invention;

[0034] Figure 4 A three-dimensional diagram of the structure of a movable base of an oilfield well-washing and workover machine proposed by the present invention;

[0035] Figure 5 A three-dimensional diagram of the drill pipe structure of an oilfield well-washing and workover rig proposed by the present invention;

[0036] Figure 6 A three-dimensional diagram of the driven gear structure of an oilfield well-washing and workover machine proposed by the present invention;

[0037] Figure 7 A three-dimensional diagram of the second set of rod structures of an oilfield well-washing and workover machine proposed by the present invention;

[0038] Figure 8 A three-dimensional diagram of the connecting gear structure of an oilfield well-washing and workover machine proposed by the present invention;

[0039] Fig. 9 A three-dimensional diagram of the nozzle structure of an oilfield well-washing and workover machine proposed by the present invention;

[0040] Fig.10 This is a stereoscopic diagram of the spur gear structure of an oilfield well flushing and workover machine proposed by the present invention.

[0041] In the figure: 1, vehicle body; 2, bracket; 3, drill rod; 31, support plate; 32, connecting plate; 33, driving gear; 34, driven gear; 35, stepping motor; 36, hydraulic chuck; 4, nozzle; 401, side plate; 402, connecting gear; 403, rotating motor; 404, connecting pipe; 405, first rack; 406, limit groove; 407, limit strip; 408, first folding pipe; 409, booster pump; 410, water pipe; 411, fixed Fixed plate; 412, spur gear; 413, servo motor; 414, second rack; 415, L-shaped plate; 416, T-shaped plate; 417, perforation; 418, connecting rod; 419, second folding tube; 5, screw; 51, driving motor; 52, slide; 53, moving seat; 54, first set of rods; 55, second set of rods; 6, mounting shell; 7, controller; 8, water tank; 9, water inlet pipe; 10, water suction pump; 11, water pump; 12, water outlet pipe. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] Reference Figure 1-Figure 10 A well-washing and workover machine for oil fields comprises a vehicle body 1, a bracket 2 arranged on the vehicle body 1, and a well-repairing device and a well-washing device arranged on the bracket 2. A lifting mechanism is arranged on the surface of the bracket 2. A mounting shell 6 is arranged on one side of the upper surface of the vehicle body 1. A controller 7 is arranged on the outer surface of the mounting shell 6. A water tank 8 is arranged on the upper surface of the vehicle body 1 close to the mounting shell 6. Two water inlet pipes 9 with valves are fixedly connected to the surface of the water tank 8. Water suction pumps 10 are arranged on the surfaces of the two water inlet pipes 9. Two water pumps 11 are arranged on the upper surface of the vehicle body 1 close to the water suction pump 10. Water suction ends of the two water pumps 11 are fixedly connected to water outlet pipes 12.

[0044] In order to facilitate the storage of the bracket 2, one side of the upper surface of the vehicle body 1 is hinged to the lower surface of one side of the bracket 2 through a hinge axis.

[0045] In order to facilitate the up and down movement of the well repairing device and the well washing device, a lifting mechanism is provided which includes a screw rod 5 , and the rotation of the screw rod 5 drives the well repairing device and the well washing device to move up and down.

[0046] In order to drive the screw 5 to rotate, the lifting mechanism also includes a driving motor 51 fixedly mounted on the upper surface of the bracket 2, and both ends of the screw 5 are mounted on the inner surface of the bracket 2 through bearings. One end of the output shaft of the driving motor 51 is fixedly sleeved with the upper end of the screw 5. Slide grooves 52 are provided on the two side surfaces of the bracket 2. A moving seat 53 is threadedly sleeved on the outer surface of the screw 5. The surface of the moving seat 53 is slidably engaged with the inner wall of the slide groove 52. The inner walls of the moving seat 53 are respectively fixedly sleeved with a first set of rods 54 and a second set of rods 55. The rotation of the output shaft of the driving motor 51 drives the screw 5 connected thereto to rotate. The rotation of the screw 5 drives the moving block connected thereto to move along the inner wall of the slide groove 52 on the screw 5. The movement of the moving block drives the first set of rods 54 and the second set of rods 55 to move.

[0047] In order to perform well repair operations on the oil well, a well repair device is provided including a drill pipe 3 for performing well repair operations on the oil well.

[0048] In order to facilitate the smooth movement of the drill pipe 3, the well repair device also includes a support plate 31 fixedly connected to the lower end of the first set of rods 54. The upper surface of the support plate 31 is fixedly connected to the lower surface of the moving seat 53 through a connecting plate 32. The drill pipe 3 is installed on the inner wall of the first set of rods 54 through a bearing. The movement of the moving seat 53 drives the support plate 31 to move synchronously through the connecting plate 32, thereby enhancing the movement stability of the support plate 31.

[0049] In order to drive the drill rod 3 to rotate, a driving gear 33 and a driven gear 34 are respectively installed on the lower surface of the support plate 31 through bearings, and the driving gear 33 is meshed with the driven gear 34. A stepper motor 35 is fixedly installed on the upper surface of the support plate 31, and one end of the output shaft of the stepper motor 35 is fixedly sleeved with the axis of the driving gear 33. A hydraulic chuck 36 is fixedly installed on the lower surface of the driven gear 34. The lower end of the drill rod 3 passes through the support plate 31 and is fixedly connected to the axis of the driven gear 34. The rotation of the output shaft of the stepper motor 35 drives the driving gear 33 connected thereto to rotate, and the rotation of the driving gear 33 drives the driven gear 34 meshed therewith to rotate, so that the rotation of the gear drives the hydraulic chuck 36 and the drill rod 3 connected thereto to rotate. In order to facilitate drilling, the drill bit is connected to the hydraulic chuck 36. In order to extend the length of the drill rod 3, the drill rod 3 with a drill bit is connected to the hydraulic chuck 36.

[0050] By setting up a well repair device, when the screw 5 rotates to drive the bracket 2 to move, the drill pipe 3 is brought close to the oil well, and the drill pipe 3 is driven to rotate at the wellhead by the rotation of the output shaft of the stepping motor 35, so as to be rotated for drilling. At the same time, the drill pipe 3 can be pushed deeper into the oil well under the action of the hydraulic chuck 36, thereby improving the well repair efficiency.

[0051] At the same time, by side drilling the original well, casing damaged wells can be repaired, production costs can be greatly reduced, remaining oil and gas resources can be developed, and the beneficial effects of increasing production and efficiency of old oil wells can be achieved.

[0052] In order to perform well flushing operations on the oil well, a well flushing device is provided, which includes nozzles 4 distributed in a circular array for flushing the oil well.

[0053] In order to facilitate the nozzle to enter the oil well, the well washing device also includes a side plate 401 symmetrically installed on one side of the outer surface of the second set of rods 55, a connecting gear 402 is installed between the two side plates 401 through a bearing, a rotating motor 403 is fixedly installed on one side surface of one side plate 401, one end of the output shaft of the rotating motor 403 is fixedly sleeved with the axis of the connecting gear 402, a connecting pipe 404 is provided on the inner wall of the second set of rods 55, a first rack 405 is fixedly installed on one side of the outer surface of the connecting pipe 404, and the connecting gear 402 meshes with the first rack 405. A limiting groove 406 is provided on the inner wall of the first sleeve rod 54, and a limiting strip 407 is fixedly connected to the other side of the outer surface of the connecting tube 404. The surface of the limiting strip 407 is slidably engaged with the inner wall of the limiting groove 406. The rotation of the output shaft of the rotating motor 403 drives the connecting gear 402 connected thereto to rotate. The rotation of the connecting gear 402 drives the first rack 405 meshing therewith to move. The movement of the first rack 405 drives the connecting tube 404 connected thereto to move up and down. The movement of the connecting tube 404 is limited by the limiting strip 407 and the limiting groove 406.

[0054] In order to facilitate clean water to enter the connecting pipe 404 and be sprayed out from the nozzle, a first folding pipe 408 is fixedly connected to the upper end of the connecting pipe 404, and a boosting pump 409 is fixedly installed on one side of the upper surface of the movable seat 53. A water guide pipe 410 is fixedly connected between the water inlet of the boosting pump 409 and the water outlet of the water suction pump 10. The water outlet of the boosting pump 409 is fixedly connected to the first folding pipe 408. The boosting pump 409 can be used to facilitate the water in the water tank 8 to be introduced into the connecting pipe 404. At the same time, the setting of the folding pipe facilitates the movement of the connecting pipe 404.

[0055] In order to adjust the distance between the nozzle 4 and the oil well, a fixed plate 411 is fixedly installed on the lower surface of the connecting pipe 404, a spur gear 412 is installed inside the fixed plate 411 through a bearing, a servo motor 413 is fixedly installed on the upper surface of the fixed plate 411, one end of the output shaft of the servo motor 413 is fixedly sleeved with the axis of the spur gear 412, and the inner wall of the fixed plate 411 is provided with second racks 414 distributed in an annular array, four second racks 414 are meshed with the spur gear 412, an L-shaped plate 415 is fixedly installed on the surface of the second rack 414, and a T-shaped plate 416 is fixedly connected to the upper surface of the L-shaped plate 415, and the outer surface of the fixed plate 411 is provided with through holes 417 distributed in an annular array, and the surfaces of the L-shaped plate 415 and the T-shaped plate 416 are slidably engaged with the inner wall of the through hole 417, and the T-shaped plate 416 is The upper surface is symmetrically provided with connecting rods 418, the lower outer surface of the connecting tube 404 is connected with a second folding tube 419 in a circular array, one end of the second folding tube 419 is fixedly connected to the nozzle 4, the upper ends of the two connecting rods 418 are fixedly connected to the outer surface of the second folding tube 419, and the rotation of the output shaft of the servo motor 413 drives the spur gear 412 connected thereto to rotate, the rotation of the spur gear 412 drives the second rack 414 meshing therewith to move, the movement of the second rack 414 drives the L-shaped plate 415 and the T-shaped plate 416 connected thereto to move along the inner wall of the perforation 417, the movement of the T-shaped plate 416 drives the connecting rod 418 to move, the movement of the connecting rod 418 drives the second folding tube 419 to expand and contract, thereby driving the nozzle 4 to move, thereby facilitating the adjustment of the distance between the nozzle 4 and the oil well.

[0056] By setting up a well washing device, two water inlet pipes 9 and two water outlet pipes 12 are set to improve the washing efficiency, and by rotating the motor 403 and the servo motor 413, the nozzle 4 can enter the oil well and can also be close to the side wall of the oil well, thereby improving the washing efficiency.

[0057] Working principle: When in use, the vehicle body 1 is started to make the well repairing device and the well washing device approach the oil well, and the well repairing device or the well washing device is aligned with the oil well as required;

[0058] When repairing a well, the drill bit is mounted on the drill pipe 3 through the hydraulic chuck 36, and the drive motor 51 is started. The clockwise rotation of the output shaft of the drive motor 51 drives the screw 5 connected thereto to rotate clockwise, and the clockwise rotation of the screw 5 drives the movable seat 53 connected thereto to move downward along the inner wall of the slide groove 52. The downward movement of the movable seat 53 drives the support plate 31 to move downward through the connecting plate 32, and at the same time drives the first set of rods 54 and the second set of rods 55 to move downward so that they extend into the oil well. At the same time, the stepper motor 35 is started, and the rotation of the output shaft of the stepper motor 35 drives the driving gear 33 connected thereto to rotate, and the rotation of the driving gear 33 drives the driven gear 34 meshing therewith to rotate, and the rotation of the driven gear 34 drives the hydraulic chuck 36 connected thereto and the drill pipe 3 to rotate, thereby facilitating drilling.

[0059] When washing the well, the rotating motor 403 is started, and the clockwise rotation of the output shaft of the rotating motor 403 drives the connecting gear 402 connected thereto to rotate clockwise. The rotation of the connecting gear 402 drives the first rack 405 to move downward through the meshing with the first rack 405. The downward movement of the first rack 405 drives the connecting pipe 404 to move downward. The downward movement of the connecting pipe 404 drives the limiting bar 407 to move downward along the inner wall of the limiting groove 406, so that the connecting pipe 404 drives the nozzle 4 to enter the oil well, and then the valve is opened and the water suction pump 10 is started. The water suction pump 10 guides the well washing liquid in the water tank 8 from the water inlet pipe 9 to the water guide pipe 410, and under the action of the booster pump 409, it is transported into the connecting pipe 404, so that it is sprayed out from the nozzle 4 to wash the oil well, and the water outlet pipe 12 is extended into the oil well, and the water pump 11 is started to discharge the well washing liquid in the oil well;

[0060] At the same time, in order to facilitate the nozzle 4 to better flush the side wall of the oil well, the servo motor 413 is started, and the clockwise rotation of the output shaft of the servo motor 413 drives the spur gear 412 connected thereto to rotate clockwise, and the clockwise rotation of the spur gear 412 drives the four second racks 414 meshing therewith to move out, and the movement of the second rack 414 drives the L-shaped plate 415 connected thereto to move out along the inner wall of the cavity, and the movement of the L-shaped plate 415 drives the T-shaped plate 416 to move out along the inner wall of the perforation 417, and the movement of the T-shaped plate 416 drives the connecting rod 418 to move out, and the movement of the connecting rod 418 drives the folding tube to stretch, so that the nozzle 4 is close to the side wall of the oil well.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oilfield well-washing and workover machine, comprising a vehicle body (1), a bracket (2) arranged on the vehicle body (1), and a well-washing device and a well-washing device arranged on the bracket (2), characterized in that: The surface of the bracket (2) is provided with a lifting mechanism, a mounting shell (6) is installed on one side of the upper surface of the vehicle body (1), a controller (7) is installed on the outer surface of the mounting shell (6), a water tank (8) is installed on the upper surface of the vehicle body (1) close to the mounting shell (6), two water inlet pipes (9) with valves are fixedly connected to the surface of the water tank (8), and the surfaces of the two water inlet pipes (9) are both provided with a water suction pump (10), and two water pumps (11) are respectively provided on the upper surface of the vehicle body (1) close to the water suction pump (10), and the water suction ends of the two water pumps (11) are both fixedly connected to a water outlet pipe (12); The lifting mechanism comprises a screw rod (5), and the rotation of the screw rod (5) drives the well repairing device and the well washing device to move up and down; Wherein, the well repair device comprises a drill pipe (3) for performing well repair operations on an oil well; The well-flushing device comprises nozzles (4) distributed in a circular array and used for flushing the oil well.

2. The oilfield well washing and workover machine according to claim 1, characterized in that: The lifting mechanism also includes a driving motor (51) fixedly mounted on the upper surface of the bracket (2); both ends of the screw rod (5) are mounted on the inner surface of the bracket (2) through bearings; one end of the output shaft of the driving motor (51) is fixedly sleeved with the upper end of the screw rod (5); sliding grooves (52) are provided through the two side surfaces of the bracket (2); a moving seat (53) is threadedly sleeved on the outer surface of the screw rod (5); and the surface of the moving seat (53) is slidably engaged with the inner wall of the sliding groove (52).

3. An oilfield well washing and workover machine according to claim 2, characterized in that: The inner wall of the movable seat (53) is respectively fixedly sleeved with a first sleeve rod (54) and a second sleeve rod (55), and one side of the upper surface of the vehicle body (1) is hinged to the lower surface of one side of the bracket (2) through a hinge shaft.

4. The oilfield well washing and workover machine according to claim 3, characterized in that: The well repair device also includes a support plate (31) fixedly connected to the lower end of the first sleeve rod (54), the upper surface of the support plate (31) is fixedly connected to the lower surface of the movable seat (53) via a connecting plate (32), and the drill rod (3) is installed on the inner wall of the first sleeve rod (54) via a bearing.

5. An oilfield well washing and workover machine according to claim 4, characterized in that: A driving gear (33) and a driven gear (34) are respectively mounted on the lower surface of the support plate (31) through bearings, the driving gear (33) meshes with the driven gear (34), a stepping motor (35) is fixedly mounted on the upper surface of the support plate (31), one end of the output shaft of the stepping motor (35) is fixedly sleeved with the axis of the driving gear (33), a hydraulic chuck (36) is fixedly mounted on the lower surface of the driven gear (34), and the lower end of the drill rod (3) passes through the support plate (31) and is fixedly connected with the axis of the driven gear (34).

6. The oilfield well washing and workover machine according to claim 3, characterized in that: The well washing device further comprises a side plate (401) symmetrically mounted on one side of the outer surface of the second sleeve rod (55); a connecting gear (402) is mounted between the two side plates (401) via a bearing; a rotating motor (403) is fixedly mounted on one side surface of one of the side plates (401); one end of an output shaft of the rotating motor (403) is fixedly sleeved with the axis of the connecting gear (402); a connecting pipe (404) is arranged on the inner wall of the second sleeve rod (55); a first rack (405) is fixedly mounted on one side of the outer surface of the connecting pipe (404); the connecting gear (402) meshes with the first rack (405); a limiting groove (406) is arranged on the inner wall of the first sleeve rod (54); a limiting strip (407) is fixedly connected to the other side of the outer surface of the connecting pipe (404); the surface of the limiting strip (407) is slidably engaged with the inner wall of the limiting groove (406).

7. The oilfield well washing and workover machine according to claim 6, characterized in that: The upper end of the connecting pipe (404) is fixedly connected to a first folding pipe (408), a booster pump (409) is fixedly installed on one side of the upper surface of the movable seat (53), a water guide pipe (410) is fixedly connected between the water inlet of the booster pump (409) and the water outlet of the water suction pump (10), and the water outlet of the booster pump (409) is fixedly connected to the first folding pipe (408).

8. The oilfield well washing and workover machine according to claim 7, characterized in that: A fixed disk (411) is fixedly mounted on the lower surface of the connecting tube (404), a spur gear (412) is mounted inside the fixed disk (411) via a bearing, a servo motor (413) is fixedly mounted on the upper surface of the fixed disk (411), one end of the output shaft of the servo motor (413) is fixedly sleeved with the axis of the spur gear (412), and second racks (414) are arranged in a circular array on the inner wall of the fixed disk (411), and four of the second racks (414) are meshed with the spur gear (412).

9. The oilfield well washing and workover machine according to claim 8, characterized in that: An L-shaped plate (415) is fixedly mounted on the surface of the second rack (414), a T-shaped plate (416) is fixedly connected to the upper surface of the L-shaped plate (415), and the outer surface of the fixed plate (411) is provided with perforations (417) distributed in a circular array, and the surfaces of the L-shaped plate (415) and the T-shaped plate (416) are slidably engaged with the inner walls of the perforations (417).

10. The oilfield well washing and workover machine according to claim 9, characterized in that: The upper surface of the T-shaped plate (416) is symmetrically installed with connecting rods (418), and the outer surface of the lower end of the connecting tube (404) is connected to a second folded tube (419) in a circular array, one end of the second folded tube (419) is fixedly connected to the nozzle (4), and the upper ends of the two connecting rods (418) are fixedly connected to the outer surface of the second folded tube (419).

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