Energy-saving oil field well washing and workover rig

Abstract

The invention discloses an energy-saving oil field well washing and workover rig, which relates to the technical field of oil field machinery, is used for maintaining a borehole, and comprises a bearing vehicle and a well workover unit, the well workover unit is mounted on the borehole, a well washing tank and a sewage suction tank are further mounted on the bearing vehicle, the well washing tank is communicated with a well washing pipe, the sewage suction tank is communicated with a sewage suction pipe, and the sewage suction pipe is communicated with the bearing vehicle. A well washing auxiliary assembly is arranged on the well washing pipe; the well repairing unit and the well washing device are integrated together, so that when a well is repaired and washed, an operator only needs to move the position of the bearing vehicle on the ground, the well repairing unit and the well washing device arranged on the bearing vehicle correspond to the position of the well, and then the operator can more conveniently switch between two functions according to operation requirements; complex equipment coordination is not needed, the well washing process and the well repairing process are closely connected, the overall operation efficiency is improved, and compared with the mode that a well washing machine and a well repairing machine are separately dispatched, the time spent on equipment dispatching is greatly shortened, and oil well maintenance operation can be carried out more quickly.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield machinery, in particular to an energy-saving oilfield well-washing and workover machine. Background Art

[0002] Well flushing machines and well repairing machines are two important equipment used for different operational purposes in the field of oil extraction. Well flushing machines inject high-pressure fluid into the well and use the flushing and carrying effects of the fluid to remove dirt, silt, oil stains, wax and other impurities from the well wall and bottom of the well to restore or improve the well's production capacity and water quality. Well repairing machines are mainly used to repair wells that have failed or require maintenance, replace downhole equipment, deal with accidents in the well, and other operations to restore the normal production capacity of the well.

[0003] However, in the existing maintenance process of oil wells, the well washing machine and the well repairing machine are two independent equipment and machinery, and the well washing and well repairing operations need to be performed alternately. When one device completes the operation, it is necessary to wait for the other device to be ready before continuing the next operation. During this period, a lot of waiting time will be generated, which reduces the overall work efficiency and also causes waste of resources.

[0004] At the same time, due to geological conditions, production requirements and other factors, the design specifications and parameters of different wellbores may be different, while the diameter of the well-washing pipe is a fixed size, which may lead to a size mismatch between the two during well-washing. If the inner diameter of the well-washing pipe is smaller than the inner diameter of the wellbore, the flow rate and velocity of the well-washing fluid will be limited, so that the well-washing fluid cannot smoothly enter the wellhead and wellbore. This may cause the well-washing fluid to accumulate near the wellhead, increase the pressure, and eventually overflow or spray out from the wellhead, causing waste, and may also affect the well-washing effect and fail to effectively clean the wellbore.

[0005] Therefore, an energy-saving oilfield well-washing and workover machine is proposed. Summary of the invention

[0006] The object of the present invention is to provide an energy-saving oilfield well-washing and workover machine to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an energy-saving oilfield well washing and repairing machine for maintaining a wellbore, comprising a carrier vehicle and a well repairing unit, the well repairing unit is installed on the wellbore, the carrier vehicle is also equipped with a well washing tank and a sewage suction tank, the well washing tank is connected with a well washing pipe, the sewage suction tank is connected with a sewage suction pipe, and the well washing pipe is provided with a well washing auxiliary component, the well washing auxiliary component comprises a metal pipe, the metal pipe is fixedly connected to the end of the well washing pipe away from the well washing tank, the end of the metal pipe away from the well washing pipe is fixedly connected with a rubber pipe, the top of the inner wall of the metal pipe is fixedly connected with a cross cross brace, the lower surface of the cross cross brace is fixedly connected with a support column, the bottom end of the support column is fixedly connected with a bottom column, the outer sleeve of the bottom column is provided with a sliding pipe, the support column is respectively provided with a bottom spring and a top spring in upper and lower distributions, the top end of the sliding pipe is fixedly connected with an impact plate, the bottom end of the bottom column is rotatably connected with a plurality of bottom connecting rods in an annular array, and the middle of the outer wall of the sliding pipe is rotatably connected in an annular array There are multiple top connecting rods, and the bottom connecting rods corresponding to the upper and lower positions are rotatably connected with an inner supporting arc plate at one end of the top connecting rod away from the bottom column. Two straight grooves are symmetrically arranged on the metal tube, and a folding sealing belt is fixedly connected to each of the two straight grooves, and a cross connecting rod is fixedly connected to each of the two straight grooves. The outer wall of the metal tube is fixedly connected with a square plate, and two sliding grooves are symmetrically arranged on one side of the square plate away from the metal tube, and an L-shaped connecting rod is slidably connected inside the two sliding grooves. The ends of the two L-shaped connecting rods away from each other are each fixedly connected to a connecting column, and the bottom ends of the two connecting columns are each fixedly connected to a rubber arc plate. The ends of the two cross connecting rods away from each other are jointly fixedly connected with a U-shaped rod, and the middle top surface of the U-shaped rod is fixedly connected with a bottom tooth plate, and the top of the outer wall of the metal tube close to the bottom tooth plate is fixedly connected to a support plate, and the end of the U-shaped rod close to the bottom tooth plate is rotatably connected to a gear, and a top tooth plate is slidably connected to the support plate, and the top of the top tooth plate is fixedly connected to a limiting ring.

[0008] Furthermore, the number of bottom connecting rods and top connecting rods is equal, the bottom connecting rods and top connecting rods corresponding to the upper and lower positions are rotatably connected to each other, the two cross connecting rods are slidingly connected to the straight grooves on the same side, and one end of the two cross connecting rods located inside the metal tube is fixedly connected to the impact plate.

[0009] Furthermore, one end of the two L-shaped connecting rods away from the square plate is slidably connected to the horizontal connecting rod.

[0010] Furthermore, the bottom column is slidably connected to the inner wall of the sliding tube, the sliding tube is slidably connected to the support column, the bottom spring is located in the sliding tube cavity, and the two ends of the bottom spring are respectively fixedly connected to the top of the inner wall of the sliding tube and the top of the bottom column.

[0011] Furthermore, two ends of the top spring are fixedly connected to the lower surface of the metal tube and the top end of the outer wall of the sliding tube respectively.

[0012] Furthermore, the two slide grooves are both inclined, with the top ends of the two slide grooves being away from each other and the bottom ends being close to each other.

[0013] Furthermore, the inner annular surfaces of the two rubber arc plates are provided with anti-slip textures.

[0014] Furthermore, the bottom tooth plate is meshed with the gear, and the gear is meshed with the top tooth plate.

[0015] Furthermore, the limiting ring is sleeved on the well-washing pipe, and the inner wall of the limiting ring is in contact with the well-washing pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By integrating the well repair unit and the well flushing device, when repairing and flushing the wellbore, the operator only needs to move the carrier vehicle on the ground so that the well repair unit and the well flushing device installed on the carrier vehicle correspond to the position of the wellbore. Then, the operator can switch between the two functions more conveniently according to the operation requirements, without the need for complex equipment coordination, so that the well flushing and well repair processes are closely connected, improving the overall operation efficiency. Compared with separately transporting the well flushing machine and the well repairing machine, the time spent on equipment transportation is greatly reduced, and the oil well maintenance operation can be carried out faster;

[0018] During the well washing operation, the rubber tube is stretched out to fit tightly against the inner wall of the wellbore wellhead, so that the rubber tube matches the wellbore size. The tight fit can effectively prevent the well washing fluid from overflowing or splashing from the gap between the wellbore and the well washing tube to the outside of the well or other unnecessary areas, so that the well washing fluid can be used for well washing in the wellbore to the maximum extent, avoiding waste caused by leakage;

[0019] By fixing the connection flow state with the wellbore during the well washing process, the uncertainty caused by unstable connection is reduced, and the high-pressure well washing fluid can be guaranteed to flow inside the wellbore according to the preset path and method, and there will be no cleaning blind area caused by loose or displaced connection, so that a more comprehensive and thorough well washing operation can be carried out on various parts such as the well wall and the bottom of the well, thereby improving the adaptability and reliability of the well washing operation;

[0020] The well-washing pipe connected to the metal pipe is supported in a vertical state by a limiting ring, that is, the well-washing pipe part connected to the wellbore is limited to a vertical state, so that the high-pressure well-washing fluid sprayed from the well-washing pipe also moves vertically downward. The high-pressure well-washing fluid can be evenly sprayed to various parts of the well wall, avoiding the wellbore deviation caused by the concentrated and inclined flushing of the high-pressure well-washing fluid on a certain side, and can evenly distribute the impact force of the high-pressure well-washing fluid on the wellbore, reducing excessive scouring and wear on the local part of the wellbore. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall device of the present invention;

[0022] Figure 2This is a schematic diagram of the structural positions of the wellbore, well-washing tank, well-washing pipe, etc. of the present invention;

[0023] Figure 3 For the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0024] Figure 4 It is a schematic diagram of the wellbore, well-washing tank, well-washing pipe and other structural positions from another perspective of the present invention;

[0025] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point B in the middle;

[0026] Figure 6 It is a vertical cross-sectional schematic diagram of the wellbore, well-washing tank, well-washing pipe and other structures of the present invention;

[0027] Figure 7 For the present invention Figure 6 The enlarged schematic diagram at C in the middle;

[0028] Figure 8 It is a transverse cross-sectional schematic diagram of the wellbore, well-washing pipe, metal pipe, rubber pipe and other structures of the present invention;

[0029] Fig. 9 It is a schematic diagram of the structural positions of the bottom connecting rod, top connecting rod, inner supporting arc plate, etc. of the present invention.

[0030] In the figure:

[0031] 1. Wellbore;

[0032] 21. Carrier; 22. Well repair unit; 23. Well washing tank; 24. Sewage suction tank; 25. Well washing pipe; 26. Sewage suction pipe;

[0033] 31. Metal pipe; 32. Rubber pipe; 33. Cross brace; 34. Support column; 35. Bottom column; 36. Slide tube; 37. Bottom spring; 38. Top spring; 39. Impact plate; 310. Bottom connecting rod; 311. Top connecting rod; 312. Inner support arc plate; 313. Straight groove; 314. Folding sealing belt; 315. Horizontal connecting rod; 316. Square plate; 317. Slide groove; 318. L-shaped connecting rod; 319. Connecting column; 320. Rubber arc plate; 321. U-shaped rod; 322. Bottom gear plate; 323. Support plate; 324. Gear; 325. Top gear plate; 326. Limiting ring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiments provided by the present invention:

[0036] Embodiment 1:

[0037] See also Figure 1 An energy-saving oilfield well-washing and workover machine is used for maintaining a wellbore 1, and comprises a carrier vehicle 21 and a workover unit 22. The workover unit 22 is mounted on the wellbore 1. A well-washing tank 23 and a sewage suction tank 24 are also mounted on the carrier vehicle 21. A well-washing pipe 25 is fixedly connected to the well-washing tank 23, and a sewage suction pipe 26 is fixedly connected to the sewage suction tank 24.

[0038] Among them, the well-washing tank 23 , the sewage suction tank 24 , the well-washing pipe 25 , and the sewage suction pipe 26 are well-washing devices of the carrier vehicle 21 , which are used for cleaning the wellbore 1 .

[0039] Wherein: the well repair unit 22 includes structures such as a derrick, a drilling platform, a rotary table, a winch, a crown block, an elevator, and a slip. When the wellbore 1 needs to be repaired, the derrick needs to be erected and fixed first to ensure that it is stable and reliable, and then the wire rope of the winch is connected to the crown block and the traveling block of the traveling system, and the elevator, slip and other tools are installed to prepare for the operation of lifting and lowering the pipe string. Then the winch is started, and the drum of the winch is controlled to rotate through the operating console so that the wire rope is wound around the drum, driving the traveling block and the elevator to rise, and the elevator clamps the coupling of the oil pipe or drill pipe to pull the pipe string out of the oil well one by one. The pulled out pipe string is neatly placed on the pipe rack in order for inspection and maintenance. When the inspection, maintenance or replacement of the pipe string is completed, the pipe string needs to be lowered into the oil well again. The operation process is opposite to that of pulling out the pipe string. The traveling block and the elevator are controlled to descend by the winch, and the pipe string is lowered into the well one by one, and the connecting thread is tightened with a tubing clamp or a drill pipe clamp to ensure that the pipe string is firmly connected.

[0040] By integrating the well repair unit 22 with the well flushing device, when repairing and flushing the wellbore 1, the operator only needs to move the position of the carrier vehicle 21 on the ground so that the well repair unit 22 and the well flushing device set on the carrier vehicle 21 correspond to the position of the wellbore 1, and then the operator can switch between the two functions more conveniently according to the operation requirements, without the need for complex equipment coordination, so that the well flushing and well repair processes are closely connected, thereby improving the overall operation efficiency. Compared with separately transporting the well flushing machine and the well repair machine, the time spent on equipment transportation is greatly reduced, and the oil well maintenance operation can be carried out more quickly.

[0041] Embodiment 2: At the same time, due to the soft characteristics of the well washing pipe 25, it is difficult to maintain a vertical downward cleaning direction when flushing the wellbore 1. The cleaning fluid sprayed from the well washing pipe 25 cannot be perpendicular to the well wall, but impacts the well wall at a certain inclination angle. Over time, lateral force will be generated on the well wall, causing the well wall to be locally subjected to greater pressure, especially when the well wall rock strength is low or there are weak points, which can easily lead to the well wall rock breaking and peeling, thereby changing the stratum structure around the wellhead and causing the wellhead to deviate.

[0042] Reference Figures 1 to 9As shown, in order to solve the above-mentioned problems, a well-washing auxiliary component is provided on the well-washing pipe 25, and the well-washing auxiliary component includes a metal pipe 31, and the metal pipe 31 is fixedly connected to the end of the well-washing pipe 25 away from the well-washing tank 23, and the end of the metal pipe 31 away from the well-washing pipe 25 is fixedly connected to a rubber tube 32, and the top of the inner wall of the metal pipe 31 is fixedly connected to a cross brace 33, and the lower surface of the cross brace 33 is fixedly connected to a support column 34, and the bottom end of the support column 34 is fixedly connected to a bottom column 35, and the outer side of the bottom column 35 is sleeved with a sliding pipe 36, and the support column 34 is respectively sleeved with a bottom spring 37 and a top spring 38 in upper and lower distribution. The top of the sliding tube 36 is fixedly connected with an impact disk 39, the bottom end of the bottom column 35 is rotatably connected with a plurality of bottom connecting rods 310 in an annular array, and the middle part of the outer wall of the sliding tube 36 is rotatably connected with a plurality of top connecting rods 311 in an annular array, and the number of the bottom connecting rods 310 and the top connecting rods 311 is equal, and the bottom connecting rods 310 and the top connecting rods 311 corresponding to the upper and lower positions are rotatably connected to each other, and the ends of the bottom connecting rods 310 and the top connecting rods 311 corresponding to the upper and lower positions away from the bottom column 35 are rotatably connected with an inner support arc plate 312, and two straight grooves 313 are symmetrically provided on the metal tube 31, and each of the two straight grooves 313 is fixedly connected with a A folded sealing belt 314 is provided, and a horizontal connecting rod 315 is fixedly connected to each of the two straight grooves 313. The two horizontal connecting rods 315 are slidably connected to the straight grooves 313 on the same side. One end of the two horizontal connecting rods 315 located inside the metal tube 31 is fixedly connected to the impact disk 39. A square plate 316 is fixedly connected to the outer wall of the metal tube 31. Two sliding grooves 317 are symmetrically provided on one side of the square plate 316 away from the metal tube 31. An L-shaped connecting rod 318 is slidably connected inside each of the two sliding grooves 317. One end of the two L-shaped connecting rods 318 away from the square plate 316 is slidably connected to the horizontal connecting rod 315. The two L-shaped connecting rods 31 The ends away from each other are fixedly connected with a connecting column 319, the bottom ends of the two connecting columns 319 are fixedly connected with a rubber arc plate 320, the ends away from each other of the two horizontal connecting rods 315 are commonly fixedly connected with a U-shaped rod 321, the middle top surface of the U-shaped rod 321 is fixedly connected with a bottom tooth plate 322, the top of the outer wall of one side of the metal tube 31 close to the bottom tooth plate 322 is fixedly connected with a support plate 323, the end of the U-shaped rod 321 close to the bottom tooth plate 322 is rotatably connected with a gear 324, the support plate 323 is slidably connected with a top tooth plate 325, and the top of the top tooth plate 325 is fixedly connected with a limiting ring 326.

[0043] Among them: the sliding tube 36 is set to be hollow, the bottom column 35 is slidably connected to the inner wall of the sliding tube 36, the sliding tube 36 is slidably connected to the outer wall of the support column 34, the bottom spring 37 is located in the sliding tube 36 cavity, the two ends of the bottom spring 37 are respectively fixedly connected to the top end of the inner wall of the sliding tube 36 and the top end of the bottom column 35, and the two ends of the top spring 38 are respectively fixedly connected to the lower surface of the metal tube 31 and the top end of the outer wall of the sliding tube 36.

[0044] The folding sealing belt 314 has the characteristic of folding up and down, and the two folding sealing belts 314 are respectively fixedly connected to the corresponding transverse connecting rods 315. The function of the folding sealing belt 314 is to ensure that the interior of the metal tube 31 is sealed while the transverse connecting rod 315 slides up and down inside the straight groove 313.

[0045] Among them: Reference Figure 3 As shown, the two slide grooves 317 are both inclined, and the top ends of the two slide grooves 317 are far away from each other and the bottom ends are close to each other.

[0046] Among them: Reference Figure 7 As shown, the inner surfaces of the two rubber arc plates 320 are both provided with anti-slip textures.

[0047] Among them: Reference Figure 3 As shown, the bottom tooth plate 322 and the gear 324 are meshed with each other, and the gear 324 and the top tooth plate 325 are meshed with each other.

[0048] Among them: Reference Figure 3 and Figure 5 As shown, the top tooth plate 325 can only slide up and down on the support plate 323.

[0049] Among them: Reference Figure 3 As shown, the limiting ring 326 is sleeved on the well-washing pipe 25 , and the inner wall of the limiting ring 326 is in contact with the well-washing pipe 25 .

[0050] The plurality of inner supporting arc plates 312 are all in contact with the inner wall of the rubber tube 32 .

[0051] Among them: in the initial stage of the well washing auxiliary component, that is, when the wellbore 1 is not washed, the well washing tank 23 does not flow the well washing fluid to the well washing pipe 25, the impact plate 39 is not impacted by the high-pressure well washing fluid, the top spring 38 and the bottom spring 37 do not produce elastic deformation, the cross connecting rod 315 is located at a high point inside the straight groove 313, the sliding pipe 36 does not slide upward from the bottom column 35, the multiple inner support arc plates 312 do not open the rubber tube 32, the two L-shaped connecting rods 318 are both at the highest point of the sliding groove 317, the two L-shaped connecting rods 318 are both on the side of the corresponding cross connecting rod 315 away from the metal pipe 31, the bottom end of the bottom tooth plate 322 is meshed with the gear 324, the top end of the top tooth plate 325 is meshed with the gear 324, and the limit ring 326 is located on the side of the well washing pipe 25 close to the metal pipe 31.

[0052] When the well washing auxiliary component is in use, when it is necessary to wash the wellbore 1, the operator inserts the rubber tube 32 into the wellbore 1. After completion, the operator uses the controller to spray high-pressure well washing fluid from the well washing tank 23 to the well washing pipe 25. The high-pressure well washing fluid flows through the well washing pipe 25 to the metal pipe 31. At this time, the high-pressure well washing fluid impacts the impact plate 39, so that the impact plate 39 is exerted with pressure, and then the impact plate 39 drives the slide tube 36 downward to move, so that the slide tube 36 moves downward on the support column 34 and the bottom column 35. In the process of the slide tube 36 moving downward, the top spring 38 is elastically stretched downward and the bottom spring 37 is elastically compressed. At the same time, the slide tube 36 moves downward so that the middle part of the slide tube 36 is close to the bottom of the bottom column 35, that is, the bottom connecting rod 310, the top connecting rod 311 and the bottom column 35, the slide tube 3 6 are connected to each other, and then the ends of the bottom connecting rod 310 and the top connecting rod 311 away from the bottom column 35 are extended in the direction away from the bottom column 35. Since the bottom connecting rod 310 and the top connecting rod 311 are arranged in a circular array, the multiple inner supporting arc plates 312 are pushed around by the extension of the bottom connecting rod 310 and the top connecting rod 311. At this time, the multiple inner supporting arc plates 312 are circularly stretched from the inside to open the rubber tube 32 around until the outer wall of the rubber tube 32 hits the inner wall of the wellbore 1. At this time, the bottom connecting rod 310 and the top connecting rod 311 cannot continue to push the inner supporting arc plates 312 to the outside, that is, at this time, the high-pressure water flow rushed out by the well washing pipe 25 cannot continue to push the impact plate 39 downward. At this time, the high-pressure well washing fluid in the metal tube 31 will enter the rubber tube 32 and flow from the bottom end of the stretched rubber tube 32 to the inside of the wellbore 1.

[0053] As the high-pressure well washing fluid continues to circulate, the high-pressure well washing fluid continues to push the impact plate 39 downward, but since the impact plate 39 cannot be pushed downward any further at this time, as the high-pressure well washing fluid continues to circulate, the position of the impact plate 39 will be fixed, that is, the multiple inner support arc plates 312 open the rubber tube 32 and the state of being in contact with the inner wall of the wellbore 1 is fixed.

[0054] During the well washing operation, the rubber tube 32 is stretched out to closely fit against the inner wall of the wellhead of the wellbore 1, specifically, the rubber tube 32 is matched with the size of the wellbore 1. The close fit can effectively prevent the well washing fluid from overflowing or splashing from the gap between the wellbore 1 and the well washing pipe 25 to the outside of the well or other unnecessary areas, so that the well washing fluid can be used for well washing in the wellbore 1 to the maximum extent, avoiding waste caused by leakage.

[0055] When the impact plate 39 moves downward, the two horizontal connecting rods 315 are driven to move downward synchronously. At this time, the two horizontal connecting rods 315 slide downward in the corresponding straight grooves 313. The two horizontal connecting rods 315 also drive the two L-shaped connecting rods 318 to move synchronously downward, so that the two L-shaped connecting rods 318 slide downward in the corresponding sliding grooves 317. At the same time, the L-shaped connecting rods 318 slide inside the horizontal connecting rods 315 toward the side close to the metal tube 31. That is, at this time, the L-shaped connecting rods 318 are driven by the horizontal connecting rods 315 to move downward, and at the same time slide inside the horizontal connecting rods 315 toward the direction of the metal tube 31. Specifically, the two L-shaped connecting rods 318 slide obliquely downward and gather together. , and then the two L-shaped connecting rods 318 drive the two rubber arc plates 320 to move obliquely downward and gather together through the corresponding connecting columns 319. In the process of the two rubber arc plates 320 obliquely downward and gathering together, the two rubber arc plates 320 resist the top outer wall of the wellbore 1 and apply pressure toward the center direction of the wellbore 1, so that the two rubber arc plates 320 are squeezed and deformed. As the position of the impact plate 39 mentioned above is fixed, the state of the two rubber arc plates 320 squeezing the top of the outer wall of the wellbore 1 is fixed, that is, at this time, the positions of the well washing pipe 25, the metal pipe 31, and the rubber pipe 32 during the well washing work are fixed, specifically, the connection and flow state with the wellbore 1 during the well washing process is fixed.

[0056] By fixing the connection flow state with the wellbore 1 during the well washing process, the uncertainty caused by unstable connection is reduced, and the high-pressure well washing fluid can be ensured to flow inside the wellbore 1 according to a preset path and method, and there will be no cleaning blind area caused by loose or shifted connections, so that a more comprehensive and thorough well washing operation can be carried out on various parts such as the well wall and the bottom of the well, thereby improving the adaptability and reliability of the well washing operation.

[0057] In the process of the two horizontal connecting rods 315 driving the U-shaped rod 321 to move downward synchronously, the U-shaped rod 321 synchronously drives the bottom tooth plate 322 to move downward. In the process of the bottom tooth plate 322 moving downward, the meshing drives the gear 324 to rotate, and the gear 324 rotates and meshes to drive the top tooth plate 325 to move upward. While the top tooth plate 325 moves upward, it drives the limit ring 326 to slide upward on the well washing pipe 25, so that the part of the well washing pipe 25 below the limit ring 326 is restricted from bending by the limit ring 326, that is, the part of the well washing pipe 25 below the limit ring 326 is supported by the limit ring 326 to be in a vertical state.

[0058] The part of the well-washing pipe 25 connected to the metal pipe 31 is supported in a vertical state by the limiting ring 326, that is, the part of the well-washing pipe 25 connected to the wellbore 1 is limited to a vertical state, so that the high-pressure well-washing fluid sprayed from the well-washing pipe 25 also moves vertically downward, and the high-pressure well-washing fluid can be evenly sprayed to various parts of the well wall, avoiding the wellbore 1 from being deviated due to the concentrated and inclined flushing of the high-pressure well-washing fluid on a certain side, and can make the impact force of the high-pressure well-washing fluid on the wellbore 1 evenly distributed, thereby reducing excessive scouring and wear on the part of the wellbore 1.

[0059] When the well washing operation of the wellbore 1 is completed, the operator controls the well washing tank 23 to stop circulating the high-pressure well washing fluid to the well washing pipe 25, and then the impact plate 39 is no longer subjected to downward pressure by the high-pressure well washing fluid. At this time, under the elastic restoring action of the top spring 38 and the bottom spring 37, the sliding tube 36 is pulled upward to reset. At this time, the bottom connecting rod 310 and the top connecting rod 311, which are away from the bottom column 35, are close to the bottom column 35, so that the multiple inner support arc plates 312 no longer open the inside of the rubber tube 32. At the same time, the impact plate 39 drives the horizontal connecting rod 315 to move upward to reset, so that the two L-shaped connecting rods 318 are driven to slide to At the top position of the corresponding slide groove 317, the two rubber arc plates 320 move synchronously and obliquely upward away from each other, that is, the two rubber arc plates 320 no longer contact the outer wall of the wellbore 1, and the two horizontal connecting rods 315 move upward while driving the bottom tooth plate 322 to move synchronously, and then the U-shaped rod 321 causes the gear 324 to move in the opposite direction through the bottom tooth plate 322, so that the gear 324 rotates in the opposite direction to drive the top tooth plate 325 to move downward, and the top tooth plate 325 drives the limit ring 326 to move downward on the well washing pipe 25. At this time, the well washing auxiliary assembly is reset, and the operator takes the metal pipe 31 and the rubber pipe 32 out of the wellbore 1.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving oilfield well-washing and workover machine, used for the maintenance of a wellbore (1), comprising a carrier vehicle (21) and a well-washing unit (22), wherein the well-washing unit (22) is mounted on the wellbore (1), and a well-washing tank (23) and a sewage suction tank (24) are also mounted on the carrier vehicle (21), wherein the well-washing tank (23) is connected to a well-washing pipe (25), and the sewage suction tank (24) is connected to a sewage suction pipe (26), wherein: A well-washing auxiliary component is arranged on the well-washing pipe (25), and the well-washing auxiliary component comprises a metal pipe (31), the metal pipe (31) is fixedly connected to one end of the well-washing pipe (25) away from the well-washing tank (23), the end of the metal pipe (31) away from the well-washing pipe (25) is fixedly connected to a rubber pipe (32), the top of the inner wall of the metal pipe (31) is fixedly connected to a cross brace (33), the lower surface of the cross brace (33) is fixedly connected to a support column (34), the bottom end of the support column (34) is fixedly connected to a bottom column (35), the outer side of the bottom column (35) is sleeved with a sliding pipe (36), and the support column (31) is fixedly connected to the bottom of the well-washing pipe (25). (34) are respectively provided with bottom springs (37) and top springs (38) in upper and lower distributions, the top of the slide tube (36) is fixedly connected with an impact plate (39), the bottom end of the bottom column (35) is rotatably connected with a plurality of bottom connecting rods (310) in an annular array, the middle part of the outer wall of the slide tube (36) is rotatably connected with a plurality of top connecting rods (311) in an annular array, the bottom connecting rods (310) and the top connecting rods (311) corresponding to the upper and lower positions are rotatably connected with an inner support arc plate (312) at one end away from the bottom column (35), and two straight grooves (313) are symmetrically provided on the metal tube (31), and the two straight grooves (313) are symmetrically provided on the metal tube (31). A folding sealing belt (314) is fixedly connected in each of the straight grooves (313), a transverse connecting rod (315) is fixedly connected to each of the two straight grooves (313), a square plate (316) is fixedly connected to the outer wall of the metal tube (31), two sliding grooves (317) are symmetrically provided on the side of the square plate (316) away from the metal tube (31), an L-shaped connecting rod (318) is slidably connected inside each of the two sliding grooves (317), and a connecting column (319) is fixedly connected to each of the ends of the two L-shaped connecting rods (318) away from each other, and the bottom ends of the two connecting columns (319) are fixedly connected to A rubber arc plate (320) is provided, and ends of the two horizontal connecting rods (315) that are away from each other are fixedly connected to a U-shaped rod (321), a bottom tooth plate (322) is fixedly connected to the middle top surface of the U-shaped rod (321), a support plate (323) is fixedly connected to the top of the outer wall of one side of the metal tube (31) close to the bottom tooth plate (322), a gear (324) is rotatably connected to the end of the U-shaped rod (321) close to the bottom tooth plate (322), a top tooth plate (325) is slidably connected to the support plate (323), and a limit ring (326) is fixedly connected to the top of the top tooth plate (325).

2. The energy-saving oilfield well-washing and workover machine according to claim 1 is characterized in that: The number of bottom connecting rods (310) and top connecting rods (311) is equal, and the bottom connecting rods (310) and top connecting rods (311) corresponding to the upper and lower positions are rotatably connected to each other, and the two transverse connecting rods (315) are slidably connected to the straight grooves (313) on the same side, and one end of the two transverse connecting rods (315) located inside the metal tube (31) is fixedly connected to the impact plate (39).

3. The energy-saving oilfield well-washing and workover machine according to claim 1 is characterized in that: One end of the two L-shaped connecting rods (318) away from the square plate (316) is slidably connected to the horizontal connecting rod (315).

4. The energy-saving oilfield well-washing and workover machine according to claim 1 is characterized in that: The bottom column (35) is slidably connected to the inner wall of the sliding tube (36), the sliding tube (36) is slidably connected to the support column (34), the bottom spring (37) is located in the cavity of the sliding tube (36), and the two ends of the bottom spring (37) are respectively fixedly connected to the top of the inner wall of the sliding tube (36) and the top of the bottom column (35).

5. The energy-saving oilfield well-washing and workover machine according to claim 1 is characterized in that: The two ends of the top spring (38) are respectively fixedly connected to the lower surface of the metal tube (31) and the top end of the outer wall of the sliding tube (36).

6. The energy-saving oilfield well-washing and workover machine according to claim 1, characterized in that: The two slide grooves (317) are both inclined, with the top ends of the two slide grooves (317) being away from each other and the bottom ends being close to each other.

7. The energy-saving oilfield well-washing and workover machine according to claim 1 is characterized in that: The inner annular surfaces of the two rubber arc plates (320) are both provided with anti-slip textures.

8. The energy-saving oilfield well-washing and workover machine according to claim 1, characterized in that: The bottom tooth plate (322) and the gear (324) are meshed with each other, and the gear (324) and the top tooth plate (325) are meshed with each other.

9. The energy-saving oilfield well-washing and workover machine according to claim 1, characterized in that: The limiting ring (326) is sleeved on the well-washing pipe (25), and the inner wall of the limiting ring (326) is in close contact with the well-washing pipe (25).

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