Multifunctional hydraulic elevator device for oilfield workover

Abstract

The present application belongs to the technical field of oilfield workover equipment, and particularly relates to a multifunctional hydraulic elevator device for oilfield workover operation. The multifunctional hydraulic elevator device for oilfield workover operation has the function of automatic cleaning, improves the functionality of the elevator device, reduces the labor intensity of the workers, and has better cleaning efficiency for the lifting hole. The multifunctional hydraulic elevator device for oilfield workover operation comprises: a lifting arm; the lifting arm is used for lifting the elevator device; a main seat is installed between the lifting arms; a hinge; the hinge is rotatably connected with the main seat through a pin shaft; the main seat and the hinge form a lifting hole; a hydraulic assembly is used for controlling the opening and closing of the hinge; water holes are circumferentially distributed on the top sidewall surface of the lifting hole; the water holes are communicated with an external water source through pipelines.

Description

Technical Field

[0001] This invention belongs to the technical field of oilfield well workover equipment, and particularly relates to a multi-functional hydraulic lifting device for oilfield well workover operations. Background Technology

[0002] During well workover operations in oilfields, it is necessary to frequently raise the tubing to a certain height. Currently, this is usually achieved using a lifting clamp. Lifting clamps are divided into manual lifting clamps and automatic lifting clamps. Manual lifting clamps require manual control of the opening and closing of two hinges, while automatic lifting clamps are generally controlled by hydraulic cylinders, which are more convenient to operate and safer.

[0003] A Chinese patent with publication number CN105822237A discloses a small-tonnage hydraulic lifting clamp for well workover, comprising a main body, a valve, and a locking tongue. The valve is rotatably connected to one side of the lower part of the main body's central hole via a valve shaft, and the locking tongue is rotatably connected to the other side of the lower part of the main body's central hole via a locking tongue shaft. A valve cylinder is located on one side of the upper part of the main body, and the piston rod of the valve cylinder is hinged to the valve via a valve linkage mechanism, driving the valve to rotate around the valve shaft. A locking tongue cylinder is located on the other side of the upper part of the main body, and the piston rod of the locking tongue cylinder is hinged to the locking tongue via a locking tongue linkage structure, driving the locking tongue to rotate around the locking tongue shaft. A hydraulic valve assembly is located in the upper part of the main body. This invention can be used in various types of well workover rigs and various types of wellhead automation equipment. It is a small-tonnage lifting clamp with a load capacity of less than 80 tons, small in size, light in weight, simple in structure, and easy to maintain. Furthermore, the opening and closing of the lifting clamp is operated remotely by hydraulic means, automatically adjusting the balance, realizing unmanned operation at the wellhead, improving well workover efficiency, reducing production costs, and improving safety performance.

[0004] Chinese patent CN106522857B discloses a novel hydraulic safety hanger, comprising a hanger body, a hanger fixing arm, a hanger right hinge, a latch protective sleeve, a hanger opening and closing mechanism, a hanger left hinge, a hanger rear seat, a replaceable hanger tooth sleeve, an opening and closing hydraulic cylinder, a hanger latch, and a latch hydraulic cylinder. The hanger body is hinged to the hanger left and right hinges via fixed pins. The hanger left and right hinges are connected to the hanger opening and closing mechanism, which is driven by the opening and closing hydraulic cylinder to open and close a parallelogram mechanism. A hanger latch is provided at the front end of the hanger left and right hinges, and the latch is fixed to the hanger left and right hinges via pins. The latch hydraulic cylinder drives the hanger latch to open and close. This invention features a compact structure, strong clamping force, uniform load distribution, replaceable and highly adaptable toothed sleeves, and a safety latch device that ensures effective closure of the lifting clamp, thereby improving safety during lifting operations.

[0005] However, further research revealed that existing hydraulic lifting devices are prone to oil sludge buildup on the lifting hole surface, leading to slippage when lifting the tubing. Furthermore, current lifting devices lack automatic cleaning capabilities, requiring manual cleaning of the oil sludge inside the lifting hole, which is cumbersome and poses a risk of injury during manual cleaning due to the device's weight. Therefore, there is an urgent need for those skilled in the art to provide a novel, multi-functional hydraulic lifting device for oilfield well workover operations to overcome these technical problems. Summary of the Invention

[0006] This invention provides a multi-functional hydraulic lifting clamp device for oilfield well workover operations, overcoming the technical shortcomings of existing hydraulic lifting clamp devices, which are relatively cumbersome to operate. This multi-functional hydraulic lifting clamp device for oilfield well workover operations has an automatic cleaning function, improving the functionality of the lifting clamp device and reducing the labor intensity of workers; it also has better cleaning efficiency for lifting holes.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A multi-functional hydraulic lifting device for oilfield well workover operations includes:

[0009] Two booms (1) are provided; the booms (1) are used to lift the lifting device.

[0010] Main seat (2), which is installed between the booms (1);

[0011] The hinge (3) has two hinges (3); the hinge (3) is rotatably connected to the main seat (2) by a pin; the main seat (2) and the hinge (3) form a lifting hole (4);

[0012] A hydraulic assembly for controlling the opening and closing of the hinge (3);

[0013] Water holes (5) are provided in a set, and the water holes (5) are evenly distributed around the top side wall surface of the hanging hole (4); the water holes (5) are connected to an external water source through a pipeline.

[0014] Preferably, a set of slots (6) are evenly distributed around the circumference of the side wall surface of the lifting hole (4); the slots (6) correspond one-to-one with the water holes (5) and are interconnected; an arc plate (7) is provided inside the slot (6), and the convex surface of the arc plate (7) faces the lifting hole (4); the top of the arc plate (7) is hinged to the slot (6), and an elastic strip (8) is fixed between the arc plate (7) and the side wall of the slot (6); an inclined baffle (9) is fixed at the top of the slot (6) near the convex surface of the arc plate (7).

[0015] Preferably, a rotating rod (10) is rotatably connected inside the water hole (5) via a bracket; an impeller (11) is fixedly connected to one end of the rotating rod (10) near the slot (6); a magnetic ball (13) is fixedly connected to one end of the rotating rod (10) away from the slot (6) via a connecting rod (12); a sliding groove (14) is provided above the water hole (5) near the magnetic ball (13); a magnetic piston (15) is slidably and sealed inside the sliding groove (14), and the magnetic piston (15) and the magnetic ball (13) attract each other when they are close; a spring (16) is fixedly connected between the upper side of the magnetic piston (15) and the top of the sliding groove (14); the sliding groove (14) and the water hole (5) are connected through a guide hole (17), and a one-way valve is provided inside the guide hole (17); a cleaning agent is added inside the sliding groove (14) between the lower side of the magnetic piston (15) and the guide hole (17).

[0016] Preferably, a storage box (18) is fixedly connected to the upper side of both the main seat (2) and the hinge (3), and a cleaning agent is added inside the storage box (18); the storage box (18) is connected to the bottom of the slide (14) through a guide hole (19), and a one-way valve is provided inside the guide hole (19).

[0017] Preferably, the one-way valve includes a ball plug (20); the ball plug (20) is located below the guide hole (17), and the diameter of the ball plug (20) is larger than the diameter of the guide hole (17); an elastic rope (21) is fixedly connected between the ball plug (20) and the side wall of the guide hole (17); a retaining ring (22) is fixedly connected to the top of the water hole (5), and the ball plug (20) is located inside the retaining ring (22).

[0018] Preferably, an elastic pad (23) is fixedly connected to the concave surface of the arc plate (7); an elastic element (24) is fixedly connected between the elastic pad (23) and the arc plate (7); air is stored inside the closed cavity formed between the elastic pad (23) and the arc plate (7); an arc groove (25) is opened at the bottom of the arc plate (7); an extension piece (26) is slidably and sealed inside the arc groove (25); an elastic element (27) is fixedly connected between the extension piece (26) and the top of the arc groove (25); the closed cavity formed between the elastic pad (23) and the arc plate (7) is connected to the top of the arc groove (25) through a pipe.

[0019] Preferably, the top of the arc plate (7) is evenly distributed with a set of fine holes (28), and the fine holes (28) penetrate the arc plate (7).

[0020] Preferably, a water-dividing cover (29) is provided on the convex surface of the arc plate (7) near the fine hole (28), and the concave surface of the water-dividing cover (29) faces the fine hole (28); an elastic rope (30) is fixed between the water-dividing cover (29) and the side wall of the fine hole (28).

[0021] This invention provides a multi-functional hydraulic lifting device for oilfield well workover operations. The device includes structural units such as a boom (1), a main seat (2), a hinge (3), hydraulic components, and a water inlet (5). Compared to existing technologies, the multi-functional hydraulic lifting device for oilfield well workover operations with the above-mentioned structural features has at least the following advantages:

[0022] 1. The multi-functional hydraulic lifting clamp device for oilfield well workover operations described in this invention has multiple water holes set on the top surface of the lifting hole. When the lifting hole needs to be cleaned, clean water is injected into the water holes through an external water source, and then the water flows out through the water holes and drips down the surface of the lifting hole to clean the side wall of the lifting hole, effectively removing oil and impurities from the surface of the lifting hole. This realizes the automatic cleaning function of the lifting clamp device, improves the functionality of the lifting clamp device, and reduces the labor intensity of the workers.

[0023] 2. The multi-functional hydraulic lifting device for oilfield well workover operations described in this invention, under normal circumstances, has its arc-shaped plate retracted into the slot, without affecting the clamping and lifting of the tubing by the lifting hole. When cleaning the lifting hole, water is sprayed out through the water hole and acts on the concave surface of the arc-shaped plate, thereby pushing the arc-shaped plate outward, so that the lower end of the arc-shaped plate turns to the outside of the slot and faces the side wall of the lifting hole. Thus, the arc-shaped plate can play a guiding role, and the water can flow along the concave surface at the bottom of the arc-shaped plate and directly impact the side wall of the lifting hole below the slot, thereby increasing the flushing force of the water flow on oil and impurities and improving the cleaning efficiency of the lifting hole. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0025] Figure 1 This is a perspective view of the multi-functional hydraulic lifting clamp device for oilfield well repair operations of the present invention;

[0026] Figure 2 This is a perspective view of the multi-functional hydraulic lifting device for oilfield well repair operations of the present invention.

[0027] Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle;

[0028] Figure 4 yes Figure 3 Enlarged view of a section at point B in the middle;

[0029] Figure 5 This is a partial sectional view of the arc-shaped plate in the multifunctional hydraulic lifting clamp device for oilfield well repair operations of the present invention;

[0030] Figure 6 This is a cross-sectional view of the arc-shaped plate in the multifunctional hydraulic lifting clamp device for oilfield well repair operations of the present invention;

[0031] Figure 7 This is a cross-sectional view of the fine hole in the multifunctional hydraulic lifting device for oilfield well repair operations of the present invention.

[0032] Reference numerals: 1. boom; 2. main seat; 3. hinge; 4. lifting hole; 5. water hole; 6. slot; 7. arc plate; 8. elastic strip; 9. baffle; 10. rotating rod; 11. impeller; 12. connecting rod; 13. magnetic ball; 14. slide groove; 15. magnetic piston; 16. spring; 17. guide hole one; 18. storage box; 19. guide hole two; 20. ball plug; 21. elastic rope one; 22. retaining ring; 23. elastic pad; 24. elastic element one; 25. arc groove; 26. outward extension plate; 27. elastic element two; 28. fine hole; 29. ​​water distribution cover; 30. elastic rope two. Detailed Implementation

[0033] This invention provides a multi-functional hydraulic lifting clamp device for oilfield well workover operations, overcoming the technical shortcomings of existing hydraulic lifting clamp devices, which are relatively cumbersome to operate. This multi-functional hydraulic lifting clamp device for oilfield well workover operations has an automatic cleaning function, improving the functionality of the lifting clamp device and reducing the labor intensity of workers; it also has better cleaning efficiency for lifting holes.

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example 1

[0035] like Figures 1 to 4 As shown in the figure, the multi-functional hydraulic lifting device for oilfield well workover operations according to an embodiment of the present invention includes:

[0036] Two booms are used to lift the lifting device.

[0037] Main seat 2, which is installed between a pair of booms 1;

[0038] There are two hinges 3; the hinges 3 are rotatably connected to the main seat 2 via pins; the main seat 2 and the pair of hinges 3 form a lifting hole 4;

[0039] Hydraulic assembly, used to control the opening and closing of hinge 3;

[0040] Water holes 5 are provided in a set, and the water holes 5 are evenly distributed around the top side wall surface of the lifting hole 4; the water holes 5 are connected to an external water source through pipes.

[0041] In existing hydraulic lifting devices, the surface of the lifting hole 4 is prone to accumulating a large amount of oil stains, which can cause slippage when lifting the oil pipe. Current lifting devices lack automatic cleaning functions, requiring manual cleaning of the oil stains inside the lifting hole 4, which is cumbersome and poses a risk of injury due to the weight of the lifting device. This invention addresses this by setting multiple water holes 5 on the top surface of the lifting hole 4. When cleaning is needed, clean water is injected into the water holes 5 through an external water source, and the water flows out through the water holes 5 and drips down the surface of the lifting hole 4, cleaning the side walls of the lifting hole 4. This effectively removes oil stains and impurities from the surface of the lifting hole 4, thereby achieving an automatic cleaning function for the lifting device, improving its functionality and reducing the labor intensity of workers.

[0042] A set of slots 6 are evenly distributed around the circumference of the side wall surface of the lifting hole 4; the slots 6 correspond one-to-one with the water holes 5 and are interconnected; an arc-shaped plate 7 is installed inside the slot 6, with the convex surface of the arc-shaped plate 7 facing the lifting hole 4; the top of the arc-shaped plate 7 is hinged to the slot 6, and an elastic strip 8 is fixed between the arc-shaped plate 7 and the side wall of the slot 6; an inclined baffle 9 is fixedly attached to the top of the slot 6 near the convex surface of the arc-shaped plate 7; under normal circumstances, the arc-shaped plate 7 is retracted into the slot 6, which does not affect the clamping of the oil pipe by the lifting hole 4. During the lifting and cleaning of the lifting hole 4, water is sprayed out through the water hole 5 and acts on the concave surface of the arc plate 7, thereby pushing the arc plate 7 to deflect outward, so that the lower end of the arc plate 7 turns to the outside of the slot 6 and faces the side wall of the lifting hole 4. Thus, the arc plate 7 can play a guiding role, and the water can flow along the concave surface at the bottom of the arc plate 7 and directly impact the side wall of the lifting hole 4 below the slot 6, thereby increasing the flushing force of the water flow on oil and impurities and improving the cleaning efficiency of the lifting hole 4.

[0043] A rotating rod 10 is rotatably connected to the water hole 5 via a bracket; an impeller 11 is fixedly connected to the end of the rotating rod 10 near the slot 6; a magnetic ball 13 is fixedly connected to the end of the rotating rod 10 away from the slot 6 via a connecting rod 12; a sliding groove 14 is provided above the water hole 5 near the magnetic ball 13; a magnetic piston 15 is slidably and sealed inside the sliding groove 14, and the magnetic piston 15 and the magnetic ball 13 attract each other when they are close; a spring 16 is fixedly connected between the upper side of the magnetic piston 15 and the top of the sliding groove 14; the sliding groove 14 and the water hole 5 are connected through a guide hole 17, and a one-way valve is provided inside the guide hole 17; the sliding groove between the lower side of the magnetic piston 15 and the guide hole 17... 14 contains cleaning agent; when water flows inside water hole 5, it will simultaneously drive impeller 11 to rotate, and then impeller 11 will drive connecting rod 12 and magnetic ball 13 to rotate through rotating rod 10. When magnetic ball 13 rotates to the top of water hole 5, it will attract magnetic piston 15 and pull magnetic piston 15 to slide downward inside slide groove 14, squeezing the cleaning agent inside slide groove 14 into water hole 5 through guide hole 17. After the cleaning agent mixes with water, it can improve the ability to remove oil stains and further improve the cleaning effect on hanging hole 4. The rotating impeller 11 will further disperse the cleaning agent, improving the uniformity of mixing between cleaning agent and water.

[0044] Storage boxes 18 are fixedly attached to the upper sides of the main seat 2 and the hinge 3, and cleaning agent is added inside the storage boxes 18. The storage boxes 18 are connected to the bottom of the slide 14 through the guide hole 19, and the guide hole 19 is equipped with a one-way valve. As the rotating rod 10 rotates, when the magnetic ball 13 gradually moves away from the slide 14, its attraction to the magnetic piston 15 weakens. Then the spring 16 pulls the magnetic piston 15 upward to slide back to its original position. At this time, a negative pressure is generated inside the slide 14, and the cleaning agent inside the storage box 18 is drawn back into the slide 14 through the guide hole 19. Afterward, when the magnetic ball 13 approaches the slide 14, it squeezes the cleaning agent in the slide 14 back into the water hole 5. This cycle is repeated, so that the cleaning agent can be intermittently squeezed into the water hole 5 and mixed with the water flow, further improving the ability to remove oil stains.

[0045] The one-way valve includes a ball plug 20; the ball plug 20 is located below the guide hole 17, and the diameter of the ball plug 20 is larger than the diameter of the guide hole 17; an elastic rope 21 is fixedly connected between the ball plug 20 and the side wall of the guide hole 17; a retaining ring 22 is fixedly connected to the top of the water hole 5, and the ball plug 20 is located inside the retaining ring 22; when the magnetic piston 15 slides downward, the cleaning agent inside the slide groove 14 pushes the ball plug 20 downward under pressure, at which time the guide hole 17 is in the open state, when the magnetic piston 15... When sliding upwards, the elastic rope 21 pulls the ball plug 20 taut on the lower side of the guide hole 17. At this time, the guide hole 17 is in a closed state, thereby achieving a one-way flow effect. When the cleaning agent is squeezed out through the guide hole 17, the ball plug 20 can disperse the cleaning agent, thereby further promoting the uniform mixing of the cleaning agent and the water flow. The retaining ring 22 can block the water flow, avoiding the problem that the water flow exerts too much force on the ball plug 20, which would reduce the fit between the ball plug 20 and the guide hole 17. Example 2

[0046] like Figure 5 As shown, another embodiment of the present invention is as follows: an elastic pad 23 is fixedly attached to the concave surface of the arc plate 7; an elastic element 24 is fixedly attached between the elastic pad 23 and the arc plate 7; air is stored inside the closed cavity formed between the elastic pad 23 and the arc plate 7; an arc groove 25 is provided at the bottom of the arc plate 7; an extension piece 26 is slidably and sealed inside the arc groove 25; an elastic element 27 is fixedly attached between the extension piece 26 and the top of the arc groove 25; the closed cavity formed between the elastic pad 23 and the arc plate 7 is connected to the top of the arc groove 25 through a pipe; when the water flow acts on the concave surface of the arc plate 7, it will squeeze and deform the elastic pad 23, thereby squeezing the air between the elastic pad 23 and the arc plate 7 into the arc groove 25 and pushing the extension piece 26 downward. After the extension piece 26 is pushed out, its end is further close to the side wall of the lifting hole 4, thereby improving the guiding effect of the water flow and increasing the impact force of the water flow on the side wall of the lifting hole 4. Example 3

[0047] like Figure 6 As shown, another embodiment of the present invention is as follows: a set of fine holes 28 are evenly distributed on the top of the arc plate 7, and the fine holes 28 penetrate the arc plate 7; by setting multiple fine holes 28, water can flow through the fine holes 28 to the convex surface of the arc plate 7, and flow downward along the convex surface of the arc plate 7, thereby cleaning the convex surface of the arc plate 7 as well. Example 4

[0048] like Figure 7As shown, another embodiment of the present invention is as follows: a water-dividing cover 29 is provided on the convex surface of the arc plate 7 near the fine hole 28, and the concave surface of the water-dividing cover 29 faces the fine hole 28; an elastic rope 30 is fixed between the water-dividing cover 29 and the side wall of the fine hole 28; by providing the water-dividing cover 29, after the water flow is sprayed out through the fine hole 28, it will be blocked by the water-dividing cover 29 and then bounced back to the surface of the arc plate 7, thus avoiding the problem that the convex surface of the arc plate 7 cannot be cleaned due to the excessive flow velocity of the water flow and direct outward through the fine hole 28.

[0049] Working Principle: This invention features multiple water holes 5 on the top surface of the lifting hole 4. When cleaning the lifting hole 4 is required, clean water is injected into the water holes 5 via an external water source. The water then sprays out through the water holes 5 and flows down the surface of the lifting hole 4, cleaning the side walls of the lifting hole 4 and effectively removing oil and impurities. This achieves the automatic cleaning function of the lifting device, improving its functionality and reducing the labor intensity of workers. Under normal circumstances, the arc-shaped plate 7 is retracted into the slot 6, not affecting the clamping and lifting of the oil pipe by the lifting hole 4. When cleaning the lifting hole 4, water is sprayed out through the water holes 5 and acts on the concave surface of the arc-shaped plate 7, thereby pushing the arc-shaped plate 7 to deflect outward, causing the lower end of the arc-shaped plate 7 to rotate. The water flows out of the slot 6 and towards the side wall of the hanging hole 4, thus the arc plate 7 can act as a guide. The water can flow along the concave surface at the bottom of the arc plate 7 and directly impact the side wall of the hanging hole 4 below the slot 6, thereby increasing the flushing force of the water flow on oil and impurities and improving the cleaning efficiency of the hanging hole 4. When the water flows inside the water hole 5, it will simultaneously drive the impeller 11 to rotate. The impeller 11 will then drive the connecting rod 12 and the magnetic ball 13 to rotate through the rotating rod 10. When the magnetic ball 13 rotates to the top of the water hole 5, it will attract the magnetic piston 15 and pull the magnetic piston 15 to slide downward inside the slide groove 14, squeezing the cleaning agent inside the slide groove 14 into the water hole 5 through the guide hole 17. The cleaning agent mixes with the water flow. This enhances the degreasing ability and further improves the cleaning effect on the lifting hole 4. The rotating impeller 11 further disperses the cleaning agent, increasing the uniformity of mixing between the cleaning agent and the water flow. As the rotating rod 10 rotates, the magnetic ball 13 gradually moves away from the slide 14, weakening its attraction to the magnetic piston 15. The spring 16 then pulls the magnetic piston 15 upwards to reset. At this time, a negative pressure is generated inside the slide 14, and the cleaning agent inside the storage box 18 is drawn back into the slide 14 through the guide hole 19. Then, when the magnetic ball 13 approaches the slide 14, it squeezes the cleaning agent back into the water hole 5. This cycle repeats, allowing the cleaning agent to be intermittently squeezed into the water hole 5 and mixed with the water. The water flow mixes, further improving the degreasing ability. When the magnetic piston 15 slides downward, the cleaning agent inside the groove 14 pushes the ball plug 20 downward under pressure, at which point the guide hole 17 is open. When the magnetic piston 15 slides upward, the elastic rope 21 pulls the ball plug 20 tight to the lower side of the guide hole 17, at which point the guide hole 17 is closed, thus achieving a one-way flow effect. When the cleaning agent is squeezed out through the guide hole 17, the ball plug 20 can disperse the cleaning agent, thereby further promoting the uniform mixing of the cleaning agent and the water flow. The retaining ring 22 can block the water flow, avoiding excessive force from the water flow on the ball plug 20, which would reduce the fit between the ball plug 20 and the guide hole 17.When the water flow acts on the concave surface of the arc-shaped plate 7, it will compress and deform the elastic pad 23. This causes the air between the elastic pad 23 and the arc-shaped plate 7 to be squeezed into the arc-shaped groove 25, pushing the outward-extending piece 26 downwards. After being extended, the end of the outward-extending piece 26 approaches the side wall of the lifting hole 4, thereby improving the guiding effect of the water flow and increasing the impact force of the water flow on the side wall of the lifting hole 4. By setting multiple fine holes 28, the water flow can flow through the fine holes 28 to the convex surface of the arc-shaped plate 7 and flow downwards along the convex surface, thus cleaning the convex surface of the arc-shaped plate 7 as well. By setting a water-dividing cover 29, after the water flow is sprayed out through the fine holes 28, it will be blocked by the water-dividing cover 29 and bounce back to the surface of the arc-shaped plate 7, preventing the water flow velocity from being too high and directly ejected outwards through the fine holes 28, thus avoiding the problem of the convex surface of the arc-shaped plate 7 not being cleaned.

[0050] Finally, it should be noted that the aforementioned front, back, left, right, top, and bottom refer to the figures in the instruction manual. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0051] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0052] This invention provides a multi-functional hydraulic lifting device for oilfield well workover operations. The device includes structural units such as a boom (1), a main seat (2), a hinge (3), hydraulic components, and a water inlet (5). Compared to existing technologies, the multi-functional hydraulic lifting device for oilfield well workover operations with the above-mentioned structural features has at least the following advantages:

[0053] 1. The multi-functional hydraulic lifting clamp device for oilfield well workover operations described in this invention has multiple water holes set on the top surface of the lifting hole. When the lifting hole needs to be cleaned, clean water is injected into the water holes through an external water source, and then the water flows out through the water holes and drips down the surface of the lifting hole to clean the side wall of the lifting hole, effectively removing oil and impurities from the surface of the lifting hole. This realizes the automatic cleaning function of the lifting clamp device, improves the functionality of the lifting clamp device, and reduces the labor intensity of the workers.

[0054] 2. The multi-functional hydraulic lifting device for oilfield well workover operations described in this invention, under normal circumstances, has its arc-shaped plate retracted into the slot, without affecting the clamping and lifting of the tubing by the lifting hole. When cleaning the lifting hole, water is sprayed out through the water hole and acts on the concave surface of the arc-shaped plate, thereby pushing the arc-shaped plate outward, so that the lower end of the arc-shaped plate turns to the outside of the slot and faces the side wall of the lifting hole. Thus, the arc-shaped plate can play a guiding role, and the water can flow along the concave surface at the bottom of the arc-shaped plate and directly impact the side wall of the lifting hole below the slot, thereby increasing the flushing force of the water flow on oil and impurities and improving the cleaning efficiency of the lifting hole.

[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multi-functional hydraulic lifting clamp device for oilfield well workover operations, characterized in that: Including: Two booms (1) are provided; the booms (1) are used to lift the lifting device. Main seat (2), which is installed between the booms (1); The hinge (3) has two hinges (3); the hinge (3) is rotatably connected to the main seat (2) by a pin; the main seat (2) and the hinge (3) form a lifting hole (4); A hydraulic assembly for controlling the opening and closing of the hinge (3); Water holes (5), a set of water holes (5) are provided, and the water holes (5) are evenly distributed around the top side wall surface of the lifting hole (4); the water holes (5) are connected to an external water source through a pipe; Inside the water hole (5), a rotating rod (10) is rotatably connected via a bracket; an impeller (11) is fixedly connected to one end of the rotating rod (10) near the slot (6); a magnetic ball (13) is fixedly connected to one end of the rotating rod (10) away from the slot (6) via a connecting rod (12); a sliding groove (14) is provided above the water hole (5) near the magnetic ball (13); a magnetic piston (15) is slidably and sealed inside the sliding groove (14), and the magnetic piston (15) and the magnetic ball (13) attract each other when they are close; a spring (16) is fixedly connected between the upper side of the magnetic piston (15) and the top of the sliding groove (14); the sliding groove (14) and the water hole (5) are connected via a guide hole (17), and a one-way valve is provided inside the guide hole (17); a cleaning agent is added inside the sliding groove (14) between the lower side of the magnetic piston (15) and the guide hole (17).

2. The multi-functional hydraulic lifting device for oilfield well workover operations according to claim 1, characterized in that: A set of slots (6) are evenly distributed around the circumference of the side wall surface of the lifting hole (4); the slots (6) correspond one-to-one with the water holes (5) and are interconnected; an arc plate (7) is provided inside the slot (6), and the convex surface of the arc plate (7) faces the lifting hole (4); the top of the arc plate (7) is hinged to the slot (6), and an elastic strip (8) is fixed between the arc plate (7) and the side wall of the slot (6); an inclined baffle (9) is fixed at the top of the slot (6) near the convex surface of the arc plate (7).

3. The multi-functional hydraulic lifting device for oilfield well workover operations according to claim 1, characterized in that: Storage boxes (18) are fixedly connected to the upper side of the main seat (2) and the hinge (3), and cleaning agent is added inside the storage box (18); the storage box (18) is connected to the bottom of the slide (14) through the guide hole (19), and a one-way valve is provided inside the guide hole (19).

4. The multi-functional hydraulic lifting device for oilfield well workover operations according to claim 1, characterized in that: The one-way valve includes a ball plug (20); the ball plug (20) is located below the guide hole (17), and the diameter of the ball plug (20) is larger than the diameter of the guide hole (17); an elastic rope (21) is fixed between the ball plug (20) and the side wall of the guide hole (17); a retaining ring (22) is fixed to the top of the water hole (5), and the ball plug (20) is located inside the retaining ring (22).

5. The multi-functional hydraulic lifting device for oilfield well workover operations according to claim 2, characterized in that: An elastic pad (23) is fixedly connected to the concave surface of the arc plate (7); an elastic element (24) is fixedly connected between the elastic pad (23) and the arc plate (7); air is stored inside the closed cavity formed between the elastic pad (23) and the arc plate (7); an arc groove (25) is opened at the bottom of the arc plate (7); an extension piece (26) is slidably and sealed inside the arc groove (25); an elastic element (27) is fixedly connected between the extension piece (26) and the top of the arc groove (25); the closed cavity formed between the elastic pad (23) and the arc plate (7) is connected to the top of the arc groove (25) through a pipe.

6. The multi-functional hydraulic lifting device for oilfield well workover operations according to claim 2, characterized in that: The top of the arc plate (7) is evenly distributed with a set of fine holes (28), and the fine holes (28) penetrate the arc plate (7).

7. The multi-functional hydraulic lifting device for oilfield well workover operations according to claim 2, characterized in that: A water-dividing cover (29) is provided on the convex surface of the arc plate (7) near the fine hole (28), and the concave surface of the water-dividing cover (29) faces the fine hole (28); an elastic rope (30) is fixed between the water-dividing cover (29) and the side wall of the fine hole (28).

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