Hydraulic power assisted paraffin removal device for rodless pump well belt

Abstract

The invention discloses a rodless pump well belt hydraulic power-assisted paraffin removal device. The device comprises a hydraulic forming system, an umbrella-shaped opening system, a paraffin removal system, a climbing system, a centralizing device and a control system which are sequentially arranged in an oil pipe from bottom to top. The rodless pump well belt hydraulic power-assisted paraffin removal device and method have the following beneficial effects that operation is easy and convenient, the rodless pump well belt hydraulic power-assisted paraffin removal device is tripped into a shaft along with pump tripping operation, and extra manual maintenance operation is not needed in daily life; particularly, when the battery is used up, the device can be conveyed to a well mouth by means of upward lifting assistance provided by the rodless pump to assist the climbing motor to drive the device to ascend, so that the power consumption of the climbing motor can be reduced, the in-well time of the device is prolonged, the actual problem of rodless pump well paraffin removal is effectively solved, the cost is reduced, and the device is safe, environmentally friendly and easy to popularize.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production equipment, and in particular relates to a rodless pump well belt hydraulic power assist wax removal device. Background Art

[0002] Oil production in oil wells mainly relies on mechanical equipment to pump crude oil from the oil layer to the ground. Electric submersible screw pumps are mainly used in oil wells with low liquid volume for energy-saving considerations. Therefore, wax deposition is more common in on-site oil pipes, and wax removal is also more troublesome. If wax removal is not timely, it will seriously affect production, causing the wellbore to be blocked and no oil to be produced, or the pump unit to be burned due to overheating. At present, there are several ways to clean the oil pipes of electric submersible screw pumps on site: one is to use wax scrapers to clean the wax. This wax cleaning method requires the cooperation of a wax cleaning vehicle, and the wax scrapers are lowered and lifted by the power of the wax cleaning vehicle to clean the wax. However, this requires a lot of manpower, generally requiring the cooperation of more than 3 people to complete, which has certain unsafe factors and is costly; the second is the hot washing wax cleaning method, which mainly uses a wax cleaning vehicle to form a high-temperature wax cleaning liquid by heating water or heating the output fluid in the wellbore. The high-temperature wax cleaning liquid is pumped into the well from the annulus of the oil casing to heat the oil pipe, dissolve the wax on the inner wall of the oil pipe, and is carried out to the well by the output fluid and the pumped wax cleaning liquid. The wax cleaning work is completed by the ground system, but due to the use of high-temperature wax cleaning liquid and even high-temperature steam, this wax cleaning method is also dangerous and costly; the third is the cable electric wax cleaning method, which mainly adds a motor to the wax cleaning device with a wax scraper, and drives the wax cleaning device up and down and cleans the wax through the motor, which requires the use of cables to power the wax cleaning device; since cables are needed for power supply, the recovery and lowering of the cables is a problem, mainly because it is difficult to synchronize the up and down movement of the wax cleaning device with the recovery of cables and wire ropes, which is easy to cause entanglement of cables and wire ropes, and thus easily causes cable wear and leakage.

[0003] Chinese Patent Application No. 201910175361.2 discloses "a variable diameter hydraulic mechanical wax cleaning device". However, the "hydraulic force" mainly used in this device is used to drive the wax scraper to change its diameter.

[0004] Chinese Patent Application No. 201910496052.5 discloses "a device and method for hot wax removal in oil pipes". The device includes a hot wax removal device, an oil pipe sleeved outside the hot wax removal device, and a distributed temperature measurement optical fiber arranged on the outer wall of the oil pipe. However, the device only introduces a hot wax removal method and does not involve a mechanical automatic wax removal method.

[0005] Chinese Patent Application No. 201821910881.0 discloses a "device for removing wax from oil pipes in self-flowing wells". The device uses a cable to remove wax and can automatically reverse to remove wax deposits on the inner wall, but it has the problems of large investment and complex operation.

[0006] Chinese patent application No. 201621180653.3 discloses a "mechanical wax removal device for rodless oil wells". The device is lowered into a rodless oil well (mainly an electric submersible pump). Through the synergistic effect of the sealing rubber plug and the lower baffle, as well as the wax scraper, the wax scraper scrapes the wax upward to the reversing pipe and then starts to reverse downward. However, the device only uses mechanical wax removal and still requires manual operation, with a long operation cycle and high labor costs. Summary of the invention

[0007] In order to solve the above problems, the object of the present invention is to provide a rodless pump well belt hydraulic power assisted wax cleaning device and method.

[0008] In order to achieve the above-mentioned purpose, the rodless pump well belt hydraulic assisted wax cleaning device provided by the present invention comprises a hydraulic forming system, an umbrella-shaped opening system, a wax cleaning system, a climbing system, a straightening device and a control system which are sequentially arranged inside the oil pipe from bottom to top; wherein, the hydraulic forming system comprises a sealing outer tube, a sealing inner tube and a limiting device; the sealing outer tube is an annular boss formed by protruding inwardly from the inner circumferential surface of the lower end of the oil pipe; a plurality of sieve holes are formed on the lower end surface of the sealing inner tube, the internal cavity is a hydraulic channel, a plurality of liquid flow holes are formed by radially penetrating the upper part, an annular sealing platform which is used to cooperate with the sealing outer tube to form a seal is formed by protruding outwardly on the upper outer circumferential surface of the annular sealing platform; a limiting ring which can be stuck on the upper end of the sealing outer tube is formed by protruding outwardly on the upper outer circumferential surface of the annular sealing platform;

[0009] The umbrella-shaped opening system comprises a hydraulic umbrella opening block, a hydraulic umbrella, a hydraulic slider, an umbrella outer cylinder, a reset spring and a fixed rod; wherein the lower end of the fixed rod is fixed to the upper end of the sealing inner cylinder, and the edge of the lower end protrudes outward to form a convex edge; the hydraulic umbrella opening block is annular, sleeved on the outer upper part of the sealing inner cylinder and the lower end is located at the top of the annular sealing platform; the hydraulic slider is an annular structure, the cross section is in the shape of a door, the opening is inward, the middle part is sleeved on the outer side of the convex edge, and the lower end is located on the lower side of the liquid flow hole on the sealing inner cylinder; the reset spring is arranged in the space between the upper end of the hydraulic slider and the convex edge; the umbrella outer cylinder is annular, the cross section is in the shape of a 7, the middle part is tightly attached to the outer side of the hydraulic slider, the upper end is fixed to the outer surface of the middle part of the fixed rod, and the lower end is located above the hydraulic umbrella opening block, thereby forming a hydraulic umbrella inlet and outlet between the lower end of the umbrella outer cylinder and the upper end of the hydraulic umbrella opening block; the hydraulic umbrella is annular, the upper end is connected to the lower end of the hydraulic slider, and the lower end can enter and exit the hydraulic umbrella inlet and outlet;

[0010] The wax cleaning system includes a wax sweeping brush end fixer, a wax sweeping brush retractor, a wax sweeping brush, a motor rubber cylinder protector, a wax sweeping brush retractor push cylinder, an outer cover, a wax sweeping battery and a wax sweeping motor; wherein the middle part of the bottom surface of the outer cover is installed on the upper end of the fixed rod, and the wax sweeping motor and the wax sweeping battery are arranged inside; a power transmitter is provided on the output shaft of the wax sweeping motor, and the power transmitter is provided with an external thread; an internal thread is provided on the inner upper part of the wax sweeping brush retractor push cylinder, the upper part passes through the outer part of the bottom surface of the outer cover and is threaded on the power transmitter, and the lower part is located on the outer side of the fixed rod; the wax sweeping brush retractor is a ring structure, which is arranged on the outer side of the fixed rod, Therefore, it can slide freely on the fixed rod, and the upper end is connected to the lower end of the pushing cylinder of the wax sweeping brush retractor; the wax sweeping brush end fixer is an annular structure, which is installed on the upper outer surface of the fixed rod at a position below the wax sweeping brush retractor; the wax sweeping brush is an annular structure, the upper part of which surrounds the outer side of the wax sweeping brush retractor, and the lower end is connected to the wax sweeping brush end fixer; the motor rubber cylinder protector is made of an annular elastic film, the upper end of which is connected to the bottom surface of the outer cover at the outer side of the pushing cylinder of the wax sweeping brush retractor, and the lower end is fixed to the top surface of the wax sweeping brush retractor to prevent the wax sweeping motor and the wax sweeping battery from being damaged by water in the production process;

[0011] The climbing system includes a climbing drum, a box, a climbing wheel, a climbing motor and a climbing battery; wherein the climbing motor and the climbing battery are arranged inside the box, and the output shaft of the climbing motor is located at the lower end; the upper end of the central axis of the climbing drum is connected to the output shaft of the climbing motor, and the lower end is fixed to the top surface of the outer cover, and a plurality of guide grooves are formed in a spiral shape on the outer circumference, and the climbing wheel is installed between two adjacent guide grooves, and the climbing wheel is closely attached to the inner circumference of the oil pipe;

[0012] The control system is installed at the upper end of the box, including a controller and a power supply battery, and the controller is electrically connected to the wax sweeping motor and the climbing motor respectively;

[0013] The straightening device includes an arch bracket and a rolling wheel; the arch bracket is elastic and vertically arranged, and multiple arch brackets are installed on the outer circumference of the controller at intervals. At least one rolling wheel is installed in the middle of each arch bracket, and the rolling wheel is against the inner circumference of the oil pipe.

[0014] The cross section of the sealed outer tube is in a vertical trapezoidal shape.

[0015] Sealing rubber rings are arranged between the contact surfaces of the convex edge and the hydraulic sliding block, and between the hydraulic sliding block and the outer tube of the umbrella.

[0016] The overall diameter of the straightening device is larger than the inner diameter of the oil pipe, so it is tightly matched with the oil pipe.

[0017] The rodless pump well belt hydraulic power-assisted wax removal device and method provided by the present invention has the following beneficial effects:

[0018] The operation is easy and can be lowered into the wellbore along with the pumping operation, without any additional manual maintenance work in daily life. Especially when the battery is exhausted, the device can be sent to the wellhead with the help of the upward lifting assistance provided by the rodless pump, and the auxiliary climbing motor can drive the device upward, thereby reducing the power consumption of the climbing motor and extending the time the device is in the well, effectively solving the practical problem of wax cleaning in rodless pump wells, reducing costs, being safe and environmentally friendly, and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A partial structural cross-sectional view of the rodless well pump with hydraulically assisted wax cleaning device provided by the present invention descending in the oil pipe and sitting on the sealed outer pipe.

[0020] Figure 2 A cross-sectional view of the structure of the hydraulic pressure forming system in the rodless pump well belt hydraulic assisted wax cleaning device provided by the present invention.

[0021] Figure 3 A cross-sectional view of the umbrella-shaped expansion system structure in the rodless pump well belt hydraulic assisted wax cleaning device provided by the present invention.

[0022] Figure 4 A cross-sectional view of the structure of the wax cleaning system in the rodless pump well belt hydraulic assisted wax cleaning device provided by the present invention.

[0023] Figure 5 A schematic diagram of the structure of the climbing system in the rodless pump well belt hydraulic assisted wax cleaning device provided by the present invention, wherein (a) is an enlarged view of the climbing system structure, (b) is a schematic diagram of the outer surface of the climbing drum, and (c) is a transverse cross-sectional view of the climbing drum.

[0024] Figure 6 A cross-sectional view of the structure of the righting system and control system in the rodless pump well belt hydraulic assisted wax cleaning device provided by the present invention.

[0025] Figure 7 This is a schematic diagram of the operating status of the rodless pump well belt hydraulic assisted wax cleaning device provided by the present invention. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-Figure 7As shown, the rodless pump well belt hydraulic assisted wax cleaning device provided by the present invention comprises a hydraulic forming system 1, an umbrella-shaped opening system 2, a wax cleaning system 3, a climbing system 4, a straightening device 5 and a control system 6 which are sequentially arranged inside the oil pipe 7 from bottom to top; wherein, the hydraulic forming system 1 comprises a sealing outer tube 1-1, a sealing inner tube 1-2 and a limit ring 1-4; the sealing outer tube 1-1 is an annular boss formed by protruding inward from the inner circumferential surface of the lower end of the oil pipe 7; a plurality of sieve holes 1-3 are formed on the lower end surface of the sealing inner tube 1-2, the internal cavity is a hydraulic channel 1-5, a plurality of liquid flow holes 1-7 are formed radially through the upper part, an annular sealing platform 1-6 for cooperating with the sealing outer tube 1-1 to form a seal is protruded outward on the upper outer circumferential surface of the annular sealing platform 1-6, and a limit ring 1-4 which can be stuck on the upper end of the sealing outer tube 1-1 is formed;

[0028] The umbrella-shaped opening system 2 includes a hydraulic umbrella opening block 2-1, a hydraulic umbrella 2-2, a hydraulic slide block 2-3, an umbrella outer tube 2-4, a return spring 2-5 and a fixed rod 2-7; wherein, the lower end of the fixed rod 2-7 is fixed to the upper end of the sealing inner tube 1-2, and the lower end edge protrudes outward to form a convex edge 2-8; the hydraulic umbrella opening block 2-1 is annular, sleeved on the outer upper part of the sealing inner tube 1-2 and the lower end is located on the top of the annular sealing platform 1-6; the hydraulic slide block 2-3 is an annular structure, the cross section is gate-shaped, the opening is inward, the middle part is sleeved on the outer side of the convex edge 2-8, and the lower end is located in the sealing inner tube 1-2. The lower side of the liquid flow hole 1-7 on the cylinder 1-2; the return spring 2-5 is arranged in the space between the upper end of the hydraulic slider 2-3 and the convex edge 2-8; the umbrella outer cylinder 2-4 is an annular structure, the cross section is 7-shaped, the middle part is close to the outer side of the hydraulic slider 2-3, the upper end is fixed to the middle outer surface of the fixed rod 2-7, and the lower end is located above the hydraulic umbrella opening block 2-1, thereby forming a hydraulic umbrella inlet and outlet between the lower end of the umbrella outer cylinder 2-4 and the upper end of the hydraulic umbrella opening block 2-1; the hydraulic umbrella 2-2 is an annular structure, the upper end is connected to the lower end of the hydraulic slider 2-3, and the lower end can enter and exit the hydraulic umbrella inlet and outlet;

[0029] The wax cleaning system 3 includes a wax sweeping brush end fixer 3-1, a wax sweeping brush retractor 3-2, a wax sweeping brush 3-3, a motor rubber cylinder protector 3-4, a wax sweeping brush retractor push cylinder 3-5, an outer cover 3-6, a wax sweeping battery 3-7 and a wax sweeping motor 3-8; wherein, the middle part of the bottom surface of the outer cover 3-6 is installed on the upper end of the fixed rod 2-7, and the wax sweeping motor 3-8 and the wax sweeping battery 3-7 are arranged inside; a power transmitter is provided on the output shaft of the wax sweeping motor 3-8, and the power transmitter is provided with an external thread; an internal thread is provided on the inner upper part of the wax sweeping brush retractor push cylinder 3-5, the upper part passes through the outer part of the bottom surface of the outer cover 3-6 and is threaded on the power transmitter, and the lower part is located on the outer side of the fixed rod 2-7; the wax sweeping brush retractor 3-2 is an annular structure, and is arranged on the fixed rod 2 -7, so it can slide freely on the fixed rod 2-7, and the upper end is connected to the lower end of the wax sweeping brush retractor push tube 3-5; the wax sweeping brush end fixer 3-1 is an annular structure, installed on the upper outer surface of the fixed rod 2-7 at a position below the wax sweeping brush retractor 3-2; the wax sweeping brush 3-3 is an annular structure, the upper part of which surrounds the outer side of the wax sweeping brush retractor 3-2, and the lower end is connected to the wax sweeping brush end fixer 3-1; the motor rubber cylinder protector 3-4 is made of an annular elastic film, the upper end of which is connected to the bottom surface of the outer cover 3-6 at the position outside the wax sweeping brush retractor push tube 3-5, and the lower end is fixed to the top surface of the wax sweeping brush retractor 3-2 to prevent the wax sweeping motor 3-8 and the wax sweeping battery 3-7 from being damaged by water during the production process;

[0030] The climbing system 4 includes a climbing drum 4-1, a box body 4-2, a climbing wheel 4-3, a climbing motor and a climbing battery; wherein the climbing motor and the climbing battery are arranged inside the box body 4-2, and the output shaft of the climbing motor is located at the lower end; the upper end of the central axis of the climbing drum 4-1 is connected to the output shaft of the climbing motor, and the lower end is fixed to the top surface of the outer cover 3-6, and a plurality of guide grooves 4-4 are formed in a spiral shape on the outer circumferential surface, and the climbing wheel 4-3 is installed between two adjacent guide grooves 4-4, and the climbing wheel 4-3 is closely attached to the inner circumferential surface of the oil pipe 7;

[0031] The control system 6 is installed at the upper end of the box 4-2, including a controller 6-1 and a power supply battery 6-2, and the controller 6-1 is electrically connected to the wax sweeping motor 3-8 and the climbing motor respectively;

[0032] The straightening device 5 includes a bow-shaped bracket 5-1 and a rolling wheel 5-2; the bow-shaped bracket 5-1 is elastic and vertically arranged, and multiple bow-shaped brackets 5-1 are installed at intervals on the outer circumference of the controller 6, and at least one rolling wheel 5-2 is installed in the middle of each bow-shaped bracket 5-1, and the rolling wheel 5-2 is against the inner circumference of the oil pipe 7.

[0033] The cross section of the sealing outer tube 1-1 is an upright trapezoidal shape. The sealing outer tube 1-1 of this structure cooperates with the limiting ring 1-4 to limit the length of the wax removal section; the limiting ring 1-4 also has another function of facilitating sealing.

[0034] A sealing rubber ring 2-6 is provided between the contact surfaces of the convex edge 2-8 and the hydraulic slide block 2-3, and between the hydraulic slide block 2-3 and the umbrella outer tube 2-4.

[0035] The overall diameter of the straightening device 5 is larger than the inner diameter of the oil pipe 7 , so it is tightly fitted with the oil pipe 7 .

[0036] The method for using the rodless pump well belt hydraulic power-assisted wax removal device provided by the present invention is described as follows:

[0037] When it is necessary to remove the wax deposited on the inner wall of the oil pipe 7, the staff will first retract the hydraulic umbrella 2-2 in the umbrella-shaped opening system 2 to the inside of the hydraulic umbrella inlet and outlet; then put the lower part of the device into the oil pipe 7 from the wellhead, and wait for the straightening device 5 to reach the upper end of the oil pipe 7. Since the overall diameter of the straightening device 5 is larger than the inner diameter of the oil pipe 7, it is necessary to apply a certain external force to press the straightening device 5 into the oil pipe 7. At this time, the middle part of the elastic bow bracket 5-1 will be close to the inner wall of the oil pipe 7, but due to the presence of the rolling wheel 5-2, it will not affect the up and down sliding of the device, and when the wax cleaning system 3 is used for wax cleaning, it can be ensured that when the climbing system 4 rotates, the control system 6 and the straightening device 5 will not rotate in the horizontal plane with the climbing system 4. Then, under the control of the controller 6-1, the climbing motor is started, thereby driving the climbing drum 4-1 and the components below to rotate together, and with the help of the climbing wheel 4-3, the device is moved downward; at the same time, the wax sweeping motor 3-8 is started, thereby driving the wax sweeping brush retractor push tube 3-5 and the wax sweeping brush retractor 3-2 to move downward together and press down the inner side of the wax sweeping brush 3-3, so that the upper part of the wax sweeping brush 3-3 is opened and contacts the inner wall of the oil pipe 7, and the wax sweeping brush 3-3 is used to remove the oil. Wax deposited on the inner wall of tube 7; when the sealing inner tube 1-2 in the hydraulic forming system 1 descends to the position of the sealing outer tube 1-1, the outer circumferential surface of the annular sealing platform 1-6 will be tightly attached to the inner circumferential surface of the sealing outer tube 1-1 to form a sealed state, blocking the upward passage of the oil well production liquid flow between the sealing inner tube 1-2 and the sealing outer tube 1-1, and the limit ring 1-4 will be stuck at the upper end of the sealing outer tube 1-1 to limit the further downward movement of the device and help sealing, and the downward process ends here.

[0038] At this time, since the oil pump on the lower side of the device is still in normal production, the lifted output fluid will flow into the space enclosed by the sealing inner cylinder 1-2 and the lower part of the hydraulic slider 2-3 through the sieve holes 1-3, the hydraulic channel 1-5 and the liquid flow holes 1-7 on the sealing inner cylinder 1-2 in sequence, thereby applying a downward force to the lower end of the hydraulic slider 2-3, causing the hydraulic slider 2-3 to move downward, and at the same time compressing the return spring 2-5, thereby pushing the hydraulic umbrella 2-2 outward from the hydraulic umbrella inlet and outlet and against the inner wall of the oil pipe 7, forming a certain degree of sealing. The controller 6-1 is used to reverse the wax sweeping motor 3-8, thereby driving the wax sweeping brush retractor push tube 3-5 and the wax sweeping brush retractor 3-2 to move upward together, until the wax sweeping brush retractor 3-2 leaves the wax sweeping brush 3-3, and the upper part of the wax sweeping brush 3-3 is recovered and leaves the inner wall of the oil pipe 7; the climbing motor is reversed, thereby driving the climbing drum 4-1 and the components below to rotate together, and under the joint action of the climbing motor and the output fluid in the hydraulic forming system 1, the device moves upward to the wellhead, and the upward process ends. In this way, the power consumption of the climbing motor can be saved and the well retention time of the device can be extended.

[0039] In addition, if the power of the climbing battery in the device is insufficient and the device has difficulty in ascending, a certain amount of hydraulic pressure can be used to assist the climbing motor in driving the device upward, which can effectively reduce the consumption of the device's own power, extend the device's operating time, and save power. Moreover, when the device's own power is insufficient, the entire device can be lifted to the wellhead for charging by the action of hydraulic pressure alone, thereby avoiding the problem of the entire device being stuck in a certain position when it is lifted to the wellhead due to insufficient power, resulting in the need for upward repair operations to remove the device.

Claims

1. A rodless pump well with hydraulic power assist wax removal device, characterized in that: The rodless pump well belt hydraulic power wax removal device comprises a hydraulic forming system (1), an umbrella-shaped opening system (2), a wax removal system (3), a climbing system (4), a straightening device (5) and a control system (6) which are arranged in sequence from bottom to top inside the oil pipe (7); wherein the hydraulic forming system (1) comprises a sealed outer tube (1-1), a sealed inner tube (1-2) and a limit device (1-4); the sealed outer tube (1-1) is an annular tube protruding inwardly from the inner circumference of the lower end of the oil pipe (7) Boss; a plurality of sieve holes (1-3) are formed on the lower end surface of the sealing inner tube (1-2); the internal cavity is a hydraulic channel (1-5); a plurality of liquid flow holes (1-7) are formed in the radial direction on the upper part; an annular sealing platform (1-6) is formed on the outer circumferential surface of the lower part and is used to cooperate with the sealing outer tube (1-1) to form a seal; a limit ring (1-4) is formed on the upper outer circumferential surface of the annular sealing platform (1-6) and can be stuck on the upper end of the sealing outer tube (1-1); The umbrella-shaped opening system (2) comprises a hydraulic umbrella opening block (2-1), a hydraulic umbrella (2-2), a hydraulic slide block (2-3), an umbrella outer tube (2-4), a return spring (2-5) and a fixing rod (2-7); wherein the lower end of the fixing rod (2-7) is fixed to the upper end of the sealing inner tube (1-2), and the edge of the lower end protrudes outward to form a convex edge (2-8); the hydraulic umbrella opening block (2-1) is annular, sleeved on the outer upper part of the sealing inner tube (1-2), and the lower end is located on the top of the annular sealing platform (1-6); the hydraulic slide block (2-3) is an annular structure, the cross section is in the shape of a gate, the opening is inward, the middle part is sleeved on the outer side of the convex edge (2-8), and the lower end is located on the sealing inner tube (1-2). The lower side of the liquid flow hole (1-7) on the sealing inner cylinder (1-2); the return spring (2-5) is arranged in the space between the upper end of the hydraulic slider (2-3) and the convex edge (2-8); the umbrella outer cylinder (2-4) is an annular structure, the cross section is 7-shaped, the middle part is closely attached to the outer side of the hydraulic slider (2-3), the upper end is fixed to the middle outer surface of the fixing rod (2-7), and the lower end is located above the hydraulic umbrella opening block (2-1), thereby forming a hydraulic umbrella inlet and outlet between the lower end of the umbrella outer cylinder (2-4) and the upper end of the hydraulic umbrella opening block (2-1); the hydraulic umbrella (2-2) is an annular structure, the upper end is connected to the lower end of the hydraulic slider (2-3), and the lower end can enter and exit the hydraulic umbrella inlet and outlet; The wax cleaning system (3) comprises a wax sweeping brush end fixer (3-1), a wax sweeping brush retractor (3-2), a wax sweeping brush (3-3), a motor rubber cylinder protector (3-4), a wax sweeping brush retractor push cylinder (3-5), an outer cover (3-6), a wax sweeping battery (3-7) and a wax sweeping motor (3-8); wherein the middle part of the bottom surface of the outer cover (3-6) is mounted on the upper end of a fixed rod (2-7), and the wax sweeping motor (3-8) and the wax sweeping battery (3-7) are arranged inside; a power transmitter is arranged on the output shaft of the wax sweeping motor (3-8), and the power transmitter is provided with an external thread; an internal thread is arranged on the upper inner part of the wax sweeping brush retractor push cylinder (3-5), the upper part of which penetrates the outer part of the bottom surface of the outer cover (3-6) and is then threaded on the power transmitter, and the lower part is located on the outer side of the fixed rod (2-7); the wax sweeping brush retractor (3-2) is an annular structure, and is arranged on the fixed rod (2-7). The outer side of the fixed rod (2-7) can slide freely on the fixed rod (2-7), and the upper end is connected to the lower end of the push tube (3-5) of the wax sweeping brush retractor; the wax sweeping brush end fixer (3-1) is an annular structure, which is installed on the upper outer surface of the fixed rod (2-7) at a position below the wax sweeping brush retractor (3-2); the wax sweeping brush (3-3) is an annular structure, the upper part of which surrounds the outer side of the wax sweeping brush retractor (3-2), and the lower end is connected to the wax sweeping brush end fixer (3-1); the motor rubber cylinder protector (3-4) is made of an annular elastic film, the upper end of which is connected to the bottom surface of the outer cover (3-6) at the position outside the push tube (3-5) of the wax sweeping brush retractor, and the lower end is fixed to the top surface of the wax sweeping brush retractor (3-2) to prevent the wax sweeping motor (3-8) and the wax sweeping battery (3-7) from being damaged by water in the production process; The climbing system (4) comprises a climbing drum (4-1), a box (4-2), a climbing wheel (4-3), a climbing motor and a climbing battery; wherein the climbing motor and the climbing battery are arranged inside the box (4-2), and the output shaft of the climbing motor is located at the lower end; the upper end of the central axis of the climbing drum (4-1) is connected to the output shaft of the climbing motor, and the lower end is fixed to the top surface of the outer cover (3-6); a plurality of guide grooves (4-4) are formed in a spiral shape on the outer circumference; a climbing wheel (4-3) is arranged between two adjacent guide grooves (4-4), and the climbing wheel (4-3) is closely attached to the inner circumference of the oil pipe (7); The control system (6) is installed at the upper end of the box (4-2), and comprises a controller (6-1) and a power supply battery (6-2), and the controller (6-1) is electrically connected to the wax sweeping motor (3-8) and the climbing motor respectively; The straightening device (5) comprises an arched bracket (5-1) and a rolling wheel (5-2); the arched bracket (5-1) is elastic and vertically arranged, a plurality of arched brackets (5-1) are installed at intervals on the outer circumference of the controller (6), at least one rolling wheel (5-2) is installed in the middle of each arched bracket (5-1), and the rolling wheel (5-2) is against the inner circumference of the oil pipe (7).

2. The rodless pump well belt hydraulic power assist wax removal device according to claim 1, characterized in that: The cross section of the sealed outer tube (1-1) is in a vertical trapezoidal shape.

3. The rodless pump well belt hydraulic power wax removal device according to claim 1 is characterized in that: A sealing rubber ring (2-6) is provided between the contact surfaces of the convex edge (2-8) and the hydraulic sliding block (2-3), and between the hydraulic sliding block (2-3) and the umbrella outer tube (2-4).

4. The rodless pump well belt hydraulic power assist wax removal device according to claim 1, characterized in that: The overall diameter of the straightening device (5) is larger than the inner diameter of the oil pipe (7), so it is tightly fitted with the oil pipe (7).

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