Oil extraction paraffin control and descaling device and method

Abstract

The invention discloses an oil extraction paraffin control descaling device which comprises a plurality of cleaning pipes with the diameters increasing in sequence, the cleaning pipes are in sliding fit, heating pipes are embedded in the pipe walls of the cleaning pipes and fixedly connected with the cleaning pipes, an air conveying hose is arranged in the cleaning pipe located on the innermost side and fixedly connected with the inner walls of the cleaning pipes, and the heating pipes are fixedly connected with the inner walls of the cleaning pipes. The lower end of the air conveying hose is fixedly connected with the annular air bag, the air conveying hose is communicated with the annular air bag, the annular air bag is arranged at the bottom end of the cleaning pipe on the outermost side in a sleeving mode, a sliding groove is formed in the inner wall of each cleaning pipe, a sliding block is arranged in each sliding groove, and a sliding block is fixedly arranged on the outer wall of the other cleaning pipe located on the inner side of the cleaning pipe. The cleaning pipes form a structure similar to a fishing rod, after the cleaning pipes are sequentially pulled out and unfolded, the inner wall of a shaft with a longer distance can be heated, a space for containing wax and dirt is formed between the cleaning pipes and the inner wall of the shaft, and the wax and the dirt can be prevented from falling to the shaft bottom by arranging the annular air bag.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of scale removal device, especially to a wax removal device and method for oil production. BACKGROUND

[0002] Generally, crude oil contains wax, which increases the viscosity of the crude oil and reduces the flowability of the crude oil. When the waxy crude oil flows upward in the wellbore, the temperature of the waxy crude oil gradually decreases. When the temperature of the waxy crude oil reaches the wax precipitation point (generally about 40℃), the wax in the waxy crude oil precipitates and condenses on the wall of the wellbore, which reduces the oil production and the recovery rate of the oil field, and causes great difficulty in production. Therefore, in the process of oil production, wax prevention and scale removal are the core technologies for maintaining efficient production of oil wells and ensuring stable operation of equipment, which are respectively aimed at the problems of wax deposition and inorganic scale deposition.

[0003] The patent with publication number CN203669829U discloses an oil production equipment, in particular to a wax removal device for oil production. The technical scheme is as follows: the device comprises an outer cylinder, an upper joint, a lower joint, a central pipe, and an oil inlet hole. The upper part of the outer cylinder is connected to the upper joint through threads, and the lower part of the outer cylinder is connected to the lower joint through threads. The central pipe is arranged in the inner part of the outer cylinder and connected to the upper joint. The central pipe is provided with a spiral blade. The upper part of the outer cylinder is provided with the oil inlet hole. The inner part of the outer cylinder is provided with a metal sleeve. The bottom of the metal sleeve is fixed to an arc-shaped filter and shunt cover through a support rod. The inner part of the metal sleeve is provided with a wax prevention block. The device has the beneficial effects of avoiding scale deposition and blockage of the upper and lower parts of the oil screen pipe and the oil pump, increasing the oil production of the oil well, and improving the recovery rate of the oil field.

[0004] The patent with publication number CN204492760U discloses a wax removal device for oil production. The device comprises an upper joint, a connecting pipe, a lower joint, an upper fixing device, an upper bearing, a spiral blade, a wax prevention alloy pipe, a heating rod, a lower bearing, and a lower fixing device. The device has the beneficial effects of simple, compact, and reasonable structure, convenient and fast assembly, reliable connection, avoidance of scale deposition and blockage of the upper and lower parts of the oil screen pipe and the oil pump, increase of the oil production of the oil well, improvement of the recovery rate of the oil field, effective removal of wax and scale in the inner part of the outer cylinder through the spiral blade on the central pipe, guarantee of the long-term normal operation of the downhole equipment, prolongation of the equipment maintenance period, saving of the equipment maintenance and repair costs, and improvement of the output efficiency.

[0005] The patent with publication number CN221546930U discloses a wax removal device for underground oil extraction, which comprises a treatment pipe and an outer cylinder body installed in the middle of the treatment pipe, and the two ends of the treatment pipe are movably connected with connecting pipes, the extension amount of the connecting pipes is adjusted by an adjusting assembly arranged at the end of the outer cylinder body, the wax removal material in the inner cavity of the outer cylinder body can fully contact with the middle part of the treatment pipe, and the wax removal material can be uniformly penetrated into the crude oil through the penetration holes on the treatment pipe, the wax removal and descaling effect is good, the extension amount of the connecting pipes is adjusted by the adjusting assembly, so that the connecting pipes can be well butted with the ends of the first oil pipe and the second oil pipe, the butt joint is convenient and fast, and the operation is convenient and manual, and the device has stronger practicability.

[0006] The patent with publication number CN204591220U discloses a wax removal device for oil extraction operation, which has the technical scheme that the device comprises a sucker rod, a wax removal device, a stop ring, an upper reversing device, an oil pipe and a lower reversing device, the inside of the oil pipe is provided with the sucker rod, the upper part of the oil pipe is provided with the upper reversing device, the lower part of the oil pipe is connected with the lower reversing device, the bottom of the lower reversing device is provided with the stop ring, and the upper part of the sucker rod is connected with the wax removal device.

[0007] The above-mentioned wax removal and descaling device and similar devices have the problem that after the wax and dirt are cleaned, the wax and dirt often fall to the bottom of the well, causing secondary pollution, and improvement is needed. SUMMARY

[0008] The present application aims to provide a wax removal and descaling device and method for oil extraction to solve the above-mentioned technical problems.

[0009] To solve the above-mentioned technical problems, the present application adopts the following technical scheme:

[0010] The present application is a wax removal and descaling device for oil extraction, which comprises a plurality of cleaning pipes with increasing diameters, the cleaning pipes are slidably connected with each other, a heating pipe is embedded in the inner wall of the cleaning pipe, the heating pipe is fixedly connected with the cleaning pipe, a gas delivery hose is arranged in the innermost cleaning pipe, the gas delivery hose is fixedly connected with the inner wall of the cleaning pipe, the lower end of the gas delivery hose is fixedly connected with a ring-shaped air bag, the gas delivery hose is in communication with the ring-shaped air bag, and the ring-shaped air bag is sleeved with the bottom end of the outermost cleaning pipe.

[0011] Preferably, a sliding groove is formed on the inner wall of the cleaning pipe, a sliding block is arranged in the sliding groove, a sliding block is fixedly arranged on the outer wall of another cleaning pipe on the inner side of the cleaning pipe, the sliding block is located in the sliding groove, and the sliding block and the sliding groove are in sliding fit, so that the cleaning pipes on the inner and outer sides can slide relative to each other.

[0012] Preferably, a vertical plate is arranged at the top end of the outermost cleaning pipe, the vertical plate is fixedly connected with the cleaning pipe, a rechargeable electric telescopic rod is arranged on the vertical plate, and the electric telescopic rod is fixedly connected with the vertical plate.

[0013] Preferably, a limiting disc is arranged on the top of the gas conveying hose, and the limiting disc is fixedly connected with the gas conveying hose.

[0014] Preferably, a rotating shaft is arranged at the bottom of the outermost cleaning pipe, bearings are arranged on the left and right ends of the rotating shaft, the inner ring of the bearing is fixedly connected with the rotating shaft, the outer ring of the bearing is fixedly connected with the inner wall of the cleaning pipe, a rotating drum is arranged on the rotating shaft, the rotating drum is fixedly connected with the rotating shaft, and the gas conveying hose is wound on the rotating drum.

[0015] Preferably, limiting plates are arranged on the left and right sides of the rotating drum, the limiting plates are arranged on the rotating shaft, and the limiting plates are fixedly connected with the rotating shaft.

[0016] Preferably, a through hole is arranged at the bottom of the outermost cleaning pipe, and the bottom end of the gas conveying hose is connected with the annular air bag through the through hole.

[0017] Preferably, two accommodating grooves are formed in the inner side of the annular air bag, and a control assembly is arranged in the accommodating groove.

[0018] Preferably, the control assembly comprises controllers, two controllers are respectively used for controlling the opening and closing of the heating pipe and the electric telescopic rod, the controllers are fixedly connected with the cleaning pipe, springs are arranged on the outer side of the controllers, one end of the spring is fixedly connected with the cleaning pipe, and the other end of the spring is fixedly connected with a pressing plate.

[0019] The present application has the following beneficial effects:

[0020] The present application discloses an oil extraction wax prevention and scale removal device and method, and the device is composed of cleaning pipes similar to a fishing rod. When the cleaning pipes are pulled out and unfolded in sequence, the inner wall of a wellbore with a longer distance can be heated, and a space for accommodating wax and scale is formed between the cleaning pipes and the inner wall of the wellbore. The annular air bag is arranged to prevent the wax and scale from falling to the bottom of the wellbore, thereby effectively solving the problem that the wax and scale will fall to the bottom of the wellbore after being cleaned, causing secondary pollution. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic view of the oil extraction wax prevention and scale removal device and method of the present application;

[0022] Figure 2 Oil extraction wax prevention and scale removal device and method Figure 1 A enlarged schematic view of part A of the oil extraction wax prevention and scale removal device and method

[0023] Figure 3 Oil extraction wax prevention and scale removal device and method Figure 1 A enlarged schematic view of part B of the oil extraction wax prevention and scale removal device and method

[0024] Figure 4 Oil extraction wax prevention and scale removal device and method Figure 1 A enlarged schematic view of part C of the oil extraction wax prevention and scale removal device and method

[0025] Figure 5 Structure schematic view of the cleaning pipe of the oil extraction wax prevention and scale removal device and method

[0026] Figure 6 Oil extraction wax prevention and scale removal device and method Figure 5 A enlarged schematic view of part D of the oil extraction wax prevention and scale removal device and method

[0027] The figure marks: 1, limit disc; 3, electric telescopic rod; 4, vertical plate; 5, gas delivery hose; 6, heating pipe; 7, cleaning pipe; 8, sliding block; 9, sliding groove; 10, through hole; 11, spring; 12, pressing plate; 13, controller; 14, annular air bag; 15, limit plate; 16, rotating drum; 17, bearing; 18, containing groove; 20, rotating shaft. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Example 1

[0032] like Figures 1-6 As shown, an oil extraction anti-wax and descaling device includes multiple cleaning pipes 7 with progressively increasing diameters. Each cleaning pipe 7 is slidably fitted together. A heating pipe 6 is embedded inside the wall of each cleaning pipe 7 and is fixedly connected to the cleaning pipe 7. A gas delivery hose 5 is installed inside the innermost cleaning pipe 7 and is fixedly connected to the inner wall of the cleaning pipe 7. The lower end of the gas delivery hose 5 is fixedly connected to an annular airbag 14 and communicates with the annular airbag 14. The annular airbag 14 is fitted around the bottom end of the outermost cleaning pipe 7.

[0033] Hold the air supply hose 5 and insert the cleaning tube 7 into the bottom of the well. Then, inflate the annular airbag 14 through the air supply hose 5 to make it expand. Pull out each cleaning tube 7 in sequence and unfold it. Activate the heating tube 6 on the cleaning tube 7 to heat the mixture of wax and dirt on the well wall and restore it to a liquid state. The space between each cleaning tube 7 and the inner wall of the well can be used to contain the wax and dirt. The expanded annular airbag 14 can prevent the wax and dirt from flowing down to the bottom of the well. Pull this device out of the well and the melted wax and dirt will be carried out of the well.

[0034] Example 2

[0035] like Figures 1-6 As shown, while other parts are the same as in Embodiment 1, the difference between this embodiment and Embodiment 1 is that: a groove 9 is provided on the inner wall of the cleaning tube 7, and a slider 8 is provided in the groove 9. A slider 8 is fixed on the outer wall of another cleaning tube 7 located inside the cleaning tube 7. The slider 8 is located in the groove 9, and the slider 8 slides in conjunction with the groove 9, so that the inner and outer cleaning tubes 7 can slide relative to each other.

[0036] By setting the groove 9 and the slider 8, the cleaning tubes 7 located on the inner and outer sides can slide smoothly, and the cleaning tubes 7 on the inner and outer sides can be prevented from separating from each other.

[0037] Example 3

[0038] like Figures 1-6As shown, while other parts are the same as in Embodiment 2, the difference between this embodiment and Embodiment 2 is that: a vertical plate 4 is provided at the top of the outermost cleaning pipe 7, and the vertical plate 4 is fixedly connected to the cleaning pipe 7; a rechargeable electric telescopic rod 3 is provided on the vertical plate 4, and the electric telescopic rod 3 is fixedly connected to the vertical plate 4; a limiting plate 1 is sleeved on the top of the air supply hose 5, and the limiting plate 1 is fixedly connected to the air supply hose 5; a rotating shaft 20 is provided at the bottom inside the outermost cleaning pipe 7; bearings 17 are sleeved at both ends of the rotating shaft 20, and the inner ring of the bearing 17 is fixedly connected to the rotating shaft 20. The outer ring of the 17 is fixedly connected to the inner wall of the cleaning tube 7. A rotating cylinder 16 is sleeved on the rotating shaft 20 and fixedly connected to the rotating shaft 20. The air supply hose 5 is wound around the rotating cylinder 16. Limiting plates 15 are provided on both the left and right sides of the rotating cylinder 16. The limiting plates 15 are sleeved on the rotating shaft 20 and fixedly connected to the rotating shaft 20. A through hole 10 is provided through the bottom of the outermost cleaning tube 7. The bottom end of the air supply hose 5 passes through the through hole 10 and connects to the annular airbag 14. Two receiving grooves 18 are opened on the inner side of the annular airbag 14. Control components are provided in the receiving grooves 18.

[0039] The control assembly includes a controller 13. Two controllers 13 are used to control the opening and closing of the heating tube 6 and the electric telescopic rod 3 respectively. The controller 13 is fixedly connected to the cleaning tube 7. A spring 11 is sleeved on the outside of the controller 13. One end of the spring 11 is fixedly connected to the cleaning tube 7, and the other end of the spring 11 is fixedly connected to the pressure plate 12.

[0040] After the annular airbag 14 inflates, it squeezes the pressure plate 12, causing the pressure plate 12 to press the self-reset control button on the controller 13, so that the two controllers 13 control the heating tube 6 to start and the electric telescopic rod 3 to retract respectively.

[0041] After the electric telescopic rod 3 retracts, it no longer restricts the extension of the cleaning pipe 7. At this time, the air supply hose 5 is pulled up, and the rotating drum 16 releases the wound air supply hose 5. The air supply hose 5 can drive each cleaning pipe 7 to be pulled out and unfolded in sequence, so that the inner wall of the well barrel is heated over a longer distance, and a space for accommodating wax and dirt is formed between the cleaning pipe 7 and the inner wall of the well barrel.

[0042] After all the cleaning pipes 7 are extended, continue pulling the gas delivery hose 5 to bring the device, along with the wax and dirt, out of the wellbore.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An oil extraction anti-wax and scale removal device, characterized in that: It includes multiple cleaning tubes (7) with progressively increasing diameters, which slide together. A heating tube (6) is embedded inside the wall of each cleaning tube (7). The heating tube (6) is fixedly connected to the cleaning tube (7). A gas delivery hose (5) is installed inside the innermost cleaning tube (7). The gas delivery hose (5) is fixedly connected to the inner wall of the cleaning tube (7). The lower end of the gas delivery hose (5) is fixedly connected to an annular airbag (14). The gas delivery hose (5) communicates with the annular airbag (14). The annular airbag (14) is fitted at the bottom of the outermost cleaning tube (7).

2. The oil extraction anti-wax and scale removal device according to claim 1, characterized in that: A groove (9) is provided on the inner wall of the cleaning tube (7), and a slider (8) is provided in the groove (9). A slider (8) is fixed on the outer wall of another cleaning tube (7) located inside the cleaning tube (7). The slider (8) is located in the groove (9), and the slider (8) slides in conjunction with the groove (9) so that the inner and outer cleaning tubes (7) can slide relative to each other.

3. The oil extraction anti-wax and scale removal device according to claim 1, characterized in that: The outermost cleaning pipe (7) is provided with a vertical plate (4) at its top end. The vertical plate (4) is fixedly connected to the cleaning pipe (7). A rechargeable electric telescopic rod (3) is provided on the vertical plate (4). The electric telescopic rod (3) is fixedly connected to the vertical plate (4).

4. The oil extraction anti-wax and scale removal device according to claim 1, characterized in that: The gas delivery hose (5) is fitted with a limiting plate (1) at the top, and the limiting plate (1) is fixedly connected to the gas delivery hose (5).

5. The oil extraction anti-wax and scale removal device according to claim 1, characterized in that: A rotating shaft (20) is provided at the bottom of the outermost cleaning tube (7). Bearings (17) are fitted on both the left and right ends of the rotating shaft (20). The inner ring of the bearing (17) is fixed to the rotating shaft (20), and the outer ring of the bearing (17) is fixed to the inner wall of the cleaning tube (7). A rotating cylinder (16) is fitted on the rotating shaft (20). The rotating cylinder (16) is fixed to the rotating shaft (20). The air supply hose (5) is wound around the rotating cylinder (16).

6. The oil extraction anti-wax and scale removal device according to claim 5, characterized in that: Limiting plates (15) are provided on both the left and right sides of the rotating drum (16). The limiting plates (15) are sleeved on the rotating shaft (20) and the limiting plates (15) are fixedly connected to the rotating shaft (20).

7. The oil extraction anti-wax and scale removal device according to claim 6, characterized in that: The bottom of the outermost cleaning tube (7) is provided with a through hole (10), and the bottom end of the air supply hose (5) passes through the through hole (10) and is connected to the annular airbag (14).

8. The oil extraction anti-wax and scale removal device according to claim 1, characterized in that: The annular airbag (14) has two receiving slots (18) on its inner side, and a control component is provided in the receiving slots (18).

9. The oil extraction anti-wax and scale removal device according to claim 8, characterized in that: The control assembly includes a controller (13), two controllers (13) are used to control the opening and closing of the heating tube (6) and the electric telescopic rod (3) respectively. The controller (13) is fixedly connected to the cleaning tube (7). A spring (11) is sleeved on the outside of the controller (13). One end of the spring (11) is fixedly connected to the cleaning tube (7), and the other end of the spring (11) is fixedly connected to the pressure plate (12).

10. A method of using an oil extraction anti-wax and scale removal device, characterized in that: The process involves holding the gas delivery hose (5), inserting the cleaning tube (7) into the bottom of the well, inflating the annular airbag (14) through the gas delivery hose (5), sequentially pulling out and unfolding each cleaning tube (7), activating the heating tube (6) on the cleaning tube (7) to heat the mixture of wax and dirt on the well wall and restore it to a liquid state. The space between each cleaning tube (7) and the inner wall of the well can be used to contain the wax and dirt. The inflated annular airbag (14) can prevent the wax and dirt from flowing downwards to the bottom of the well. The device is then pulled out of the well, and the melted wax and dirt are carried out of the well along with it.

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