An oil-water well operation minor repair wellhead oil-water recovery device

Abstract

The application discloses an oil-water recovery device for oil-water well operation minor repair wellhead, and relates to the technical field of well operation. The application comprises an oil receiving box, the bottom of one side of the oil receiving box is fixed with an oil discharge pipe, a splash-proof device is arranged at the oil receiving box, the splash-proof device comprises a U-shaped frame fixed at the bottom of the oil receiving box, a threaded rod is rotatably arranged in the U-shaped frame, a threaded block is threadedly connected to the threaded rod, a notched cylinder is fixed to the outer wall of the threaded block, and a flange is fixed to the bottom of the notched cylinder. The arrangement of the splash-proof device enables the oil receiving box, the threaded rod and the threaded block to drive the notched cylinder to form a shielding protection outside the wellhead and the oil pipe. In the instant when the oil pipe is lifted and pulled out of the oil wellhead, if the contaminated oil-water liquid is splashed, the notched cylinder can effectively block the splashing of the contaminated oil-water liquid, so that the contaminated oil-water liquid does not pollute the wellhead blowout preventer and the wellhead platform, and the working environment is kept clean.

Description

Technical Field

[0001] This invention relates to the field of well workover technology, specifically to an oil and water recovery device for minor wellhead repairs in oil and water well operations. Background Technology

[0002] Oil and water well maintenance work mainly includes cleaning the wellhead, repairing equipment, and troubleshooting, aiming to ensure wellhead safety and normal production. During oil and water well maintenance, leakage of oil and water from the wellhead is inevitable. Oil and water spills can cause well site pollution, waste of oil and water, and the generation of oily soil waste. To avoid waste and pollution, a maintenance cleaning platform is usually set up at the wellhead.

[0003] Chinese patent CN221373548U discloses a wellhead anti-pollution and oil-water recovery device, including an oil receiving container. The oil receiving container includes a first oil receiving part and a second oil receiving part that are interconnected. The depth of the second oil receiving part is greater than the depth of the first oil receiving part, allowing liquid in the first oil receiving part to flow into the second oil receiving part. The first oil receiving part includes a fitting hole, through which it can be fitted onto a wellhead blowout preventer (BOP). A sealing element is provided between the first oil receiving part and the wellhead BOP. This patent optimizes the structure of the wellhead anti-pollution and oil-water recovery device. The oil receiving container adopts an integrated structure design, reducing the number of seams that need to be sealed compared to a split design. In use, it is directly fitted onto the wellhead BOP, requiring only a seal between the fitting hole and the wellhead BOP.

[0004] However, current oil-water recovery devices have the following problems: During well workover operations, when the tubing is disconnected and pulled out of the wellhead, the sludge and water carried out of the well will flow out rapidly and splash. The current oil-water recovery device is not convenient to protect against the splashed sludge and water, which can easily fall and splash onto the blowout preventer and the small platform at the wellhead, causing wellhead environmental pollution and affecting the working environment of the operators. Therefore, we propose an oil-water recovery device for small-scale wellhead workover operations. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an oil-water recovery device for minor wellhead repairs in oil and water well operations, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oil-water recovery device for minor repairs of oil and water wells, comprising an oil receiving box, an oil drain pipe fixed to one side bottom of the oil receiving box, an anti-splash device provided at the oil receiving box, the anti-splash device comprising a U-shaped frame fixed to the bottom of the oil receiving box, a threaded rod rotatably mounted inside the U-shaped frame, a threaded block threadedly connected to the outside of the threaded rod, a notched cylinder fixed to the outer wall of the threaded block, a flange fixed to the bottom of the notched cylinder, the notch of the notched cylinder facing the oil drain pipe, the notched cylinder vertically penetrating and slidably mounted at the bottom of the oil receiving box, a plurality of limiting blocks evenly and equidistantly fixed to the top of the notched cylinder, the limiting blocks being used to limit the position of the notched cylinder at the oil receiving box, and a sealing component provided at the bottom of the oil receiving box for sealing the connection between the notched cylinder and the oil receiving box.

[0007] According to the above technical solution, the sealing assembly includes several support rods, which are evenly spaced and vertically penetrate the bottom of the flange edge of the notched cylinder. An arc pressure plate is fixed between the tops of the support rods. A spring is provided between the bottom of the arc pressure plate and the flange edge of the notched cylinder. An arc rubber gasket is fixed to the top of the arc pressure plate. Both the top of the arc pressure plate and the arc rubber gasket have openings that are adapted to the notched cylinder, and the openings of the arc pressure plate and the arc rubber gasket are clearance-fitted with the notched cylinder.

[0008] According to the above technical solution, a transverse movement device is provided above the oil receiving box. The transverse movement device includes a T-shaped frame fixed to the top of the oil receiving box. A sliding column is slidably installed through the side of the T-shaped frame. A lock is fixed to the end of the sliding column away from the T-shaped frame. A lock is fixed to the outside of the lock by bolts. A screw is threaded through the side of the T-shaped frame. The end of the screw away from the T-shaped frame is rotatably connected to the outer wall of the lock.

[0009] According to the above technical solution, a long trough frame is fixed to the top of the oil receiving box, and a net bag is fixed to the middle of the long trough frame. The net bag is used to collect the oil sludge flowing out of the oil pipe.

[0010] According to the above technical solution, a center plate is fixed to the side of the long slot frame, and U-shaped guide plates are fixed to both sides of the center plate. A spring is provided between the U-shaped guide plate and the outer wall of the center plate. A triangular plate is fixed to the bottom of the U-shaped guide plate. The bottom of the triangular plate is an inclined surface, and the inclined surface of the triangular plate is located on the movement trajectory of the top notch corner of the notched cylinder.

[0011] According to the above technical solution, an auxiliary device is provided at the T-shaped frame. The auxiliary device includes a small motor, which is fixed at the T-shaped frame. A rotating rod is fixed at the bottom of the small motor, and a spiral blade is fixed at the lower outer wall of the rotating rod.

[0012] According to the above technical solution, an annular inclined groove column is fixed on the lower outer wall of the rotating rod. An annular inclined groove is opened on the outside of the annular inclined groove column. A fixed column is slidably installed inside the annular inclined groove of the annular inclined groove column. A sliding plate is fixed on the outer wall of the fixed column, and the sliding plate is slidably installed on the inner wall of the oil receiving box. A push column is fixed on the side of the sliding plate near the net bag. A notched scraping ring is fixed at the bottom of the push column by a bracket.

[0013] According to the above technical solution, the outer diameter of the notched scraper ring is equal to the inner diameter of the notched cylinder.

[0014] This invention provides an oil-water recovery device for wellhead repair operations in oil and water wells. It has the following beneficial effects:

[0015] (1) The present invention, through the setting of the anti-splash device, enables the oil receiving box, threaded rod, and threaded block to work together to drive the notched cylinder to form a shield and protection outside the wellhead and the tubing. When the tubing is lifted out of the wellhead and the sludge oil and water splashes, the notched cylinder can effectively block the sludge oil and water splash, preventing the sludge oil and water from contaminating the wellhead blowout preventer and wellhead platform, and keeping the working environment clean. At the same time, the threaded rod, threaded block, notched cylinder, and the corresponding spring of the arc pressure plate work together to drive the arc pressure plate to squeeze the arc rubber pad, so that the arc rubber pad can fit more tightly in the bottom gap between the oil receiving box and the notched cylinder. The arc rubber pad can prevent the sludge oil and water from leaking from the gap between the oil receiving box and the notched cylinder when the tubing is pulled out, ensuring the sealing effect.

[0016] (2) By setting up a transverse movement device, the threaded rod, threaded block, notched cylinder, screw, and sliding column work together to pull the oil pipe to the upper position of the mesh bag. The oil sludge flowing out of the oil pipe will fall onto the mesh bag, thereby preventing the oil sludge in the oil pipe from falling into the oil collection box and ultimately causing the oil drain pipe to become blocked, affecting the oil drain pipe's oil discharge. Furthermore, the center plate and U-shaped guide plate will form a shield on the displacement trajectory of the oil pipe, thereby further preventing the oil sludge in the oil pipe from falling into the oil collection box.

[0017] (3) The present invention, through the setting of auxiliary devices, enables the small motor and the rotating rod to drive the spiral blade to rotate. The rotation of the spiral blade can increase the flow speed of the liquid, promote the smooth discharge of sludge and oily water, and help prevent the solid substances in the oily water liquid from depositing or clogging the pipe, ensuring the smooth flow of the oil drain pipe. At the same time, the rotating rod, the annular inclined groove column, the fixed column, the sliding plate, the oil receiving box, and the push column work together to drive the net bag to fluctuate up and down, thereby helping to disperse the oil sludge accumulated in the net bag, preventing the oil sludge from accumulating into clumps, and avoiding the oil sludge from clogging the net bag pores due to excessive deposition. At the same time, the sliding plate drives the notched scraper ring to move up and down reciprocally through the push column. The notched scraper ring can reciprocate to scrape the inner wall of the notched cylinder, thereby preventing the solid substances in the sludge and oily water liquid from depositing on the inner wall of the notched cylinder and interfering with the use of the notched cylinder, thus ensuring that the notched cylinder can run smoothly when moving up and down. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the entire invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the entire invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the splash-proof device of the present invention. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the splash-proof device of the present invention. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the transverse movement device of the present invention;

[0023] Figure 6 This is a partial structural diagram of the transverse movement device of the present invention. Figure 1 ;

[0024] Figure 7 This is a partial structural diagram of the transverse movement device of the present invention. Figure 2 ;

[0025] Figure 8 This is a schematic diagram of the auxiliary device of the present invention;

[0026] Figure 9 This is a partial structural schematic diagram of the auxiliary device of the present invention.

[0027] In the diagram: 1. Oil receiving box; 2. Oil drain pipe; 3. Splash preventer; 31. U-shaped frame; 32. Threaded rod; 33. Threaded block; 34. Notched cylinder; 35. Limiting block; 36. Arc pressure plate; 37. Arc rubber pad; 38. Support rod; 4. Lateral movement device; 41. T-shaped frame; 42. Sliding column; 43. Screw; 44. Lock one; 45. Lock two; 46. Long slot frame; 47. Net bag; 48. Center plate; 49. U-shaped guide plate; 410. Triangular plate; 5. Auxiliary device; 51. Small motor; 52. Rotating rod; 53. Spiral blade; 54. Annular inclined slot column; 55. Push column; 56. Notched scraper ring; 57. Slide plate; 58. Fixed column. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Please see Figures 1-9 One embodiment of the present invention is: an oil-water recovery device for minor repairs of oil and water wells, comprising an oil receiving box 1, an oil drain pipe 2 fixed to one side bottom of the oil receiving box 1, and a splash guard 3 provided at the oil receiving box 1. The splash guard 3 includes a U-shaped frame 31 fixed to the bottom of the oil receiving box 1, a threaded rod 32 rotatably mounted inside the U-shaped frame 31, a threaded block 33 threadedly connected to the outside of the threaded rod 32, a notched cylinder 34 fixed to the outer wall of the threaded block 33, a flange fixed to the bottom of the notched cylinder 34, the notch of the notched cylinder 34 facing the oil drain pipe 2, and the notched cylinder 34 vertically penetrating and slidably mounted. At the bottom of the oil receiving box 1 and at the top of the notched cylinder 34, several limiting blocks 35 are evenly and equidistantly fixed. The limiting blocks 35 are used to limit the position of the notched cylinder 34 at the oil receiving box 1. The bottom of the oil receiving box 1 is provided with a sealing component for sealing the connection between the notched cylinder 34 and the oil receiving box 1. Through the above structure, the notched cylinder 34 forms a shield and protection outside the wellhead and the tubing. When the tubing is lifted and pulled out of the wellhead, and oily water splashes, the notched cylinder 34 can effectively block the splashing of oily water, preventing the oily water from contaminating the wellhead blowout preventer and the wellhead platform, and keeping the working environment clean.

[0030] The sealing assembly includes several support rods 38, which are evenly spaced and vertically penetrate the bottom of the flange edge of the notched cylinder 34. An arc pressure plate 36 is fixed between the tops of the support rods 38. A spring is provided between the bottom of the arc pressure plate 36 and the flange edge of the notched cylinder 34. An arc rubber gasket 37 is fixed to the top of the arc pressure plate 36. Both the top of the arc pressure plate 36 and the arc rubber gasket 37 have openings that are adapted to the notched cylinder 34, and the openings of the arc pressure plate 36 and the arc rubber gasket 37 are clearance fits with the notched cylinder 34. Through the above structure, the flange edge of the notched cylinder 34 continuously applies an upward pushing force to the arc pressure plate 36 through the spring corresponding to the arc pressure plate 36. The arc pressure plate 36 squeezes the arc rubber gasket 37, so that the arc rubber gasket 37 can fit more tightly in the bottom gap between the oil receiving box 1 and the notched cylinder 34.

[0031] A horizontal movement device 4 is provided above the oil receiving box 1. The horizontal movement device 4 includes a T-shaped frame 41 fixed to the top of the oil receiving box 1. A sliding column 42 is slidably installed through the side of the T-shaped frame 41. A lock 44 is fixed to the end of the sliding column 42 away from the T-shaped frame 41. A lock 45 is fixed to the outside of the lock 44 by bolts. A screw 43 is threaded through the side of the T-shaped frame 41. The end of the screw 43 away from the T-shaped frame 41 is rotatably connected to the outer wall of the lock 44. The top of the oil receiving box 1 is fixed. A long trough frame 46 is fixed, and a net bag 47 is fixed in the middle of the long trough frame 46. The net bag 47 is used to collect the oil sludge flowing out of the oil pipe. Through the above structure, the oil sludge flowing out of the oil pipe will fall onto the net bag 47, thereby preventing the oil sludge in the oil pipe from falling into the oil receiving box 1, which would eventually cause the oil drain pipe 2 to be blocked and affect the oil drain pipe 2 to drain oil. In addition, the center plate 48 and the U-shaped guide plate 49 will form a shield on the displacement trajectory of the oil pipe, thereby further preventing the oil sludge in the oil pipe from falling into the oil receiving box 1.

[0032] A center plate 48 is fixed to the side of the long slot frame 46. U-shaped guide plates 49 are fixed to both sides of the center plate 48. A spring is provided between the U-shaped guide plate 49 and the outer wall of the center plate 48. A triangular plate 410 is fixed to the bottom of the U-shaped guide plate 49. The bottom of the triangular plate 410 is an inclined surface. The inclined surface of the triangular plate 410 is located on the movement trajectory of the top notch corner of the notched cylinder 34. With the above structure, the push column 55 will push the bottom of the net bag 47 during the movement, causing the net bag 47 to fluctuate up and down. This helps to disperse the sludge accumulated in the net bag 47, prevent the sludge from accumulating into clumps, and avoid clogging the pores of the net bag 47 due to excessive deposition. In addition, the push column 55 drives the inner wall of the notched cylinder 34 to scrape back and forth, thereby preventing solid substances in the sludge and water from depositing on the inner wall of the notched cylinder 34 and interfering with the use of the notched cylinder 34. This ensures that the notched cylinder 34 can run smoothly when it moves up and down.

[0033] In use, the oil receiving box 1 is fitted onto the blowout preventer flange at the wellhead, and then bolted to secure it. The drain pipe 2 is connected to the external receiving header. After the tubing is lifted and connected to the wellhead, the locking device 2 45 is bolted to the outside of the locking device 1 44, positioning the tubing between the locking device 2 45 and the locking device 1 44. Then, the operator rotates the threaded rod 32, which drives the threaded block 33 to move the notched cylinder 34 upwards. This creates a shielding effect between the notched cylinder 34 and the tubing at the wellhead. When the tubing is lifted and pulled out of the wellhead, and oily / watery liquids splash, the notched cylinder 34 provides protection. Effectively prevents oily and watery liquids from splashing, avoiding contamination of the wellhead blowout preventer and wellhead platform, and maintaining a clean working environment; each time the threaded rod 32 drives the threaded block 33 to move the notched cylinder 34 upward, the flange edge of the notched cylinder 34 will continuously exert an upward thrust on the arc pressure plate 36 through the spring corresponding to the arc pressure plate 36. The arc pressure plate 36 squeezes the arc rubber pad 37, so that the arc rubber pad 37 can fit more tightly in the bottom gap between the oil receiving box 1 and the notched cylinder 34. The arc rubber pad 37 can prevent oily and watery liquids from leaking from the gap between the oil receiving box 1 and the notched cylinder 34 when the tubing is pulled out, ensuring a sealing effect.

[0034] After the tubing is lifted and pulled out of the wellhead, it is still between lock 2 45 and lock 1 44. At this time, the operator rotates the threaded rod 32 in the opposite direction. The threaded rod 32 drives the threaded block 33 to move the notched cylinder 34 downward. The top surface of the notched cylinder 34 moves below the top horizontal plane of the wellhead. Then, the operator rotates the screw 43. Under the coordinated action of the screw 43 and the sliding column 42, the screw 43 and the sliding column 42 drive lock 2 45 and lock 1 44 to pull the tubing to the position above the net bag 47. At this time, the sludge flowing out of the tubing will fall onto the net bag 47, thus preventing the sludge in the tubing from falling into the oil receiving box 1, which would eventually cause the drain pipe 2 to be blocked and affect the oil discharge of the drain pipe 2. In addition, the center plate 48 and the U-shaped guide plate 49 will form a shield on the displacement trajectory of the tubing, thereby further preventing the sludge in the tubing from falling into the oil receiving box 1.

[0035] It should be noted that during the upward movement of the notched cylinder 34, the notch corners at the top of the notched cylinder 34 will push the inclined surfaces of the two triangular plates 410 respectively, causing the U-shaped guide plate 49 to move towards the center of the central plate 48. This avoids the presence of the U-shaped guide plate 49 interfering with the upward movement of the notched cylinder 34. When the top surface of the notched cylinder 34 moves below the top horizontal plane of the wellhead, the notch corners at the top of the notched cylinder 34 no longer push the inclined surfaces of the two triangular plates 410. Under the spring force of the U-shaped guide plate 49, the U-shaped guide plate 49 will unfold from the central plate 48, thus ensuring that the U-shaped guide plate 49 and the central plate 48 will form a barrier on the displacement trajectory of the tubing.

[0036] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, an auxiliary device 5 is provided at the T-shaped frame 41. The auxiliary device 5 includes a small motor 51, which is fixed at the T-shaped frame 41. A rotating rod 52 is fixed at the bottom of the small motor 51, and a spiral blade 53 is fixed at the lower outer wall of the rotating rod 52.

[0037] An annular inclined groove column 54 is fixed to the lower outer wall of the rotating rod 52. An annular inclined groove is opened on the outside of the annular inclined groove column 54. A fixed column 58 is slidably installed inside the annular inclined groove of the annular inclined groove column 54. A sliding plate 57 is fixed to the outer wall of the fixed column 58, and the sliding plate 57 is slidably installed on the inner wall of the oil receiving box 1. A push column 55 is fixed to the side of the sliding plate 57 near the net bag 47. A notched scraper ring 56 is fixed to the bottom of the push column 55 through a bracket. The outer diameter of the notched scraper ring 56 is equal to the inner diameter of the notched cylinder 34.

[0038] During use, when discharging sludge and oily water from the oil drain pipe 2, the small motor 51 is started. The small motor 51 drives the rotating rod 52 to rotate the spiral blade 53. The rotation of the spiral blade 53 increases the flow speed of the liquid, promotes the smooth discharge of sludge and oily water, and helps prevent solid matter in the oily water from depositing or clogging the pipe, ensuring the unobstructed flow of the oil drain pipe 2. When the rotating rod 52 rotates, it also drives the annular inclined groove column 54 to rotate. The annular inclined groove of the annular inclined groove column 54 drives the fixed column 58 to drive the sliding plate 57 to move up and down along the inner wall of the oil receiving box 1. When the push column 55 moves... During the movement, the bottom of the net bag 47 is pushed, causing the net bag 47 to fluctuate up and down, which helps to break up the oil sludge accumulated in the net bag 47, prevents the oil sludge from accumulating into clumps, and avoids the oil sludge from clogging the pores of the net bag 47 due to excessive deposition; the slide plate 57 drives the notch scraper ring 56 to move up and down reciprocally through the push column 55. The notch scraper ring 56 can reciprocate to scrape the inner wall of the notch cylinder 34, thereby preventing solid substances in the oily and watery liquid from depositing on the inner wall of the notch cylinder 34 and interfering with the use of the notch cylinder 34, thus ensuring that the notch cylinder 34 can run smoothly when it moves up and down.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An oil-water recovery device for minor wellhead repairs in oil and water well operations, characterized in that: The system includes an oil receiving box (1), with an oil drain pipe (2) fixed to the bottom of one side of the oil receiving box (1). An anti-splash device (3) is provided at the oil receiving box (1). The anti-splash device (3) includes a U-shaped frame (31) fixed to the bottom of the oil receiving box (1). A threaded rod (32) is rotatably installed inside the U-shaped frame (31). A threaded block (33) is threadedly connected to the outside of the threaded rod (32). A notched cylinder (34) is fixed to the outer wall of the threaded block (33). The bottom of the notched cylinder (34) is fixed... The notch cylinder (34) has a flange edge, and the notch is set in the direction of the oil drain pipe (2). The notch cylinder (34) is vertically penetrating and slidably installed at the bottom of the oil receiving box (1). Several limiting blocks (35) are evenly and equidistantly fixed at the top of the notch cylinder (34). The limiting blocks (35) are used to limit the position of the notch cylinder (34) at the oil receiving box (1). The bottom of the oil receiving box (1) is provided with a sealing component for sealing the connection between the notch cylinder (34) and the oil receiving box (1). A transverse movement device (4) is provided above the oil receiving box (1). The transverse movement device (4) includes a T-shaped frame (41) fixed to the top of the oil receiving box (1). A sliding column (42) is slidably installed through the side of the T-shaped frame (41). A lock (44) is fixed to the end of the sliding column (42) away from the T-shaped frame (41). A lock (45) is fixed to the outside of the lock (44) by bolts. A screw (43) is threaded through the side of the T-shaped frame (41). The end of the screw (43) away from the T-shaped frame (41) is rotatably connected to the outer wall of the lock (44).

2. The oil and water recovery device at the wellhead for minor repairs of oil and water wells according to claim 1, characterized in that: The sealing assembly includes several support rods (38), which are evenly spaced vertically through the bottom of the flange edge of the notched cylinder (34). An arc pressure plate (36) is fixed between the tops of the support rods (38). A spring is provided between the bottom of the arc pressure plate (36) and the flange edge of the notched cylinder (34). An arc rubber pad (37) is fixed to the top of the arc pressure plate (36). Both the tops of the arc pressure plate (36) and the arc rubber pad (37) are provided with openings that are compatible with the notched cylinder (34), and the openings of the arc pressure plate (36) and the arc rubber pad (37) are clearance-fitted with the notched cylinder (34).

3. The oil and water recovery device at the wellhead for minor repairs of oil and water wells according to claim 1, characterized in that: The top of the oil receiving box (1) is fixed with a long groove frame (46), and a net bag (47) is fixed in the middle of the long groove frame (46). The net bag (47) is used to collect the oil sludge flowing out of the oil pipe.

4. The oil and water recovery device at the wellhead for minor repairs of oil and water wells according to claim 3, characterized in that: A center plate (48) is fixed to the side of the long slot frame (46). U-shaped guide plates (49) are fixed to both sides of the center plate (48). A spring is provided between the U-shaped guide plate (49) and the outer wall of the center plate (48). A triangular plate (410) is fixed to the bottom of the U-shaped guide plate (49). The bottom of the triangular plate (410) is an inclined surface. The inclined surface of the triangular plate (410) is located on the movement trajectory of the top notch corner of the notched cylinder (34).

5. The oil and water recovery device at the wellhead for minor repairs of oil and water wells according to claim 4, characterized in that: An auxiliary device (5) is provided at the T-shaped frame (41). The auxiliary device (5) includes a small motor (51). The small motor (51) is fixed at the T-shaped frame (41). A rotating rod (52) is fixed at the bottom of the small motor (51). A spiral blade (53) is fixed at the lower outer wall of the rotating rod (52).

6. The oil and water recovery device at the wellhead for minor repairs of oil and water wells according to claim 5, characterized in that: An annular inclined groove column (54) is fixed on the lower outer wall of the rotating rod (52). An annular inclined groove is opened on the outside of the annular inclined groove column (54). A fixed column (58) is slidably installed inside the annular inclined groove of the annular inclined groove column (54). A sliding plate (57) is fixed on the outer wall of the fixed column (58). The sliding plate (57) is slidably installed on the inner wall of the oil receiving box (1). A push column (55) is fixed on the side of the sliding plate (57) near the net bag (47). A notched scraper ring (56) is fixed at the bottom of the push column (55) by a bracket.

7. The oil and water recovery device at the wellhead for minor repairs of oil and water wells according to claim 6, characterized in that: The outer diameter of the notched scraper ring (56) is equal to the inner diameter of the notched cylinder (34).

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