An apparatus and method for treating the inner surface of a pipe used in oil production

Abstract

The application provides an inner surface treatment device and method for petroleum exploitation pipe, which comprises a main shaft motor, a surface treatment structure, a propeller, a first conveying rail, a second conveying rail, a rust removal assembly, a sand storage layer, a connecting spray disc, a disc connecting seat, a supporting main shaft, a plurality of electric telescopic columns one arranged between the sand storage layer and the connecting disc, a plurality of electric telescopic columns two arranged between the disc connecting seat and the connecting disc, a plurality of axial movable ports arranged on the outer wall of the connecting disc, and a positioning rod arranged in each axial movable port; a sand blasting machine group is arranged on the circumferential side of the supporting main shaft, a plurality of axial connecting seats are arranged on the outer wall of the sand blasting machine group, a plurality of sand blasting guns are movably connected to the axial connecting seats, the sand blasting guns are movably connected between the positioning rods, and sand blasting connecting pipes are arranged between the sand blasting guns and the sand blasting machine group; the anticorrosion assembly is used for uniformly applying an anticorrosive adhesive to the inner wall of the petroleum pipe, and the application can improve the cleaning effect of the inner wall of the pipe, so that the anticorrosive coating can better adhere to the inner wall of the petroleum pipe.

Description

Technical Field

[0001] This invention relates to the field of oil pipeline cleaning equipment technology, specifically to an internal surface treatment device and method for oil extraction pipes. Background Technology

[0002] Oilfield piping typically consists of oil pipelines and their accessories. Oil pipelines are seamless steel pipes used in oil refineries for furnace tubes and other pipelines. Geological drilling pipes are used by geological departments for core drilling. They can be categorized by application as drill pipes, core tubes, casing, and sedimentation pipes, and are relatively expensive. Due to the underground working environment, oil pipelines require advanced corrosion protection, often involving recycling and re-corrosion treatment. During pipeline treatment, it's necessary to clean the oil deposits and other contaminants from the pipe wall. Sand washing is commonly used for this purpose. However, sand washing is difficult and is usually done manually. Manual sand washing is inefficient and lacks precise control. Often, the swaying of the sandblasting gun during manual operation causes sand and gravel to splash, affecting the actual washing effect and preventing the effective application of subsequent anti-corrosion coatings, thus impacting the oil pipeline's performance.

[0003] To achieve the above objectives, the present invention provides an apparatus and method for treating the inner surface of pipes used in oil extraction, which can solve the problems mentioned in the background art. Summary of the Invention

[0004] The present invention adopts the following technical solution:

[0005] An internal surface treatment device for oil extraction pipes includes a spindle motor, a surface treatment structure, a pusher, a first conveyor rail, and a second conveyor rail.

[0006] One end of the surface treatment structure is connected to the spindle motor. The surface treatment structure includes a rust removal component and an anti-corrosion component. The rust removal component is connected to the output end of the spindle motor, and the anti-corrosion component is connected to the side of the rust removal component away from the spindle motor.

[0007] The rust removal assembly includes a sand storage layer, a connecting spray plate, a disc connecting seat, and a supporting spindle.

[0008] Multiple electrically operated telescopic columns are provided between the sand storage layer and the connecting disc, and multiple electrically operated telescopic columns are provided between the disc connecting seat and the connecting disc. The outer wall of the connecting disc is provided with multiple axial movable openings, and a positioning rod is provided inside each of the axial movable openings.

[0009] The supporting spindle is equipped with a sandblasting unit on its periphery. The outer wall of the sandblasting unit is provided with multiple axial connecting seats. Multiple sandblasting guns are movably connected to the axial connecting seats. The sandblasting guns are movably connected to the positioning rod. A sandblasting connecting pipe is provided between the sandblasting guns and the sandblasting unit. An anti-slip rubber ring is provided between the sandblasting connecting pipe and the axial movable port to prevent displacement. The anti-corrosion component is used to uniformly apply anti-corrosion adhesive to the inner wall of the oil pipe.

[0010] Preferably, the supporting spindle is at the same position as the rotation axis of the spindle motor, the sand storage layer is connected to the side of the supporting spindle closer to the spindle motor, and the disc connecting seat is connected to the side of the supporting spindle away from the spindle motor.

[0011] The output ends of both the electric telescopic column one and the electric telescopic column two are connected to both sides of the connecting spray plate. A drive disc is provided on one side of the disc connecting seat, and the side of the drive disc away from the disc connecting seat is connected to the anti-corrosion component.

[0012] Preferably, the drive disc is provided with multiple telescopic cylinders, the output end of a single telescopic cylinder extends out of the drive disc and is connected to a drive wheel seat, the drive wheel seat is provided with an electric wheel, and the multiple telescopic cylinders operate synchronously.

[0013] Preferably, a lifting structure is provided below the first conveying rail, the conveying directions of the first conveying rail and the second conveying rail are on the same straight line, the pusher is fixed above the first conveying rail, and the main shaft motor is connected above the pusher;

[0014] The second conveying rail is provided with a positioning seat. The upper surface of the positioning seat is composed of two split symmetrical arc surfaces, and the upper surface of the arc surface is in direct contact with the outer wall of the oil pipe.

[0015] Preferably, the anti-corrosion component includes a storage tank and a mounting tank, both of which are cylindrical boxes, with the mounting tank located on the side of the storage tank away from the main spindle motor;

[0016] The storage tank is equipped with a pressurizing pump area. Multiple coating plates are evenly arranged on the outer wall of the pressurizing pump area. Adjacent coating plates are fixedly connected to each other. Each coating plate has a telescopic channel communicating with the outside. A pressure stabilizing pipe is movably installed inside the telescopic channel. One end of the pressure stabilizing pipe extends out of the telescopic channel and is connected to an arc-shaped coating plate. A porous membrane is provided on the side of the arc-shaped coating plate away from the pressurizing pump area.

[0017] Preferably, the pressurizing pump area is provided with a winding reel, and multiple telescopic conduits are connected to the winding reel. One end of the telescopic conduit is connected to the pressure stabilizing pipe, and the other end is connected to the output port of the pressurizing pump area.

[0018] Preferably, the inner wall of the telescopic channel is provided with multiple rubber back pressure rings evenly distributed in the opposite direction along the pipeline;

[0019] The pressure stabilizing pipe is provided with a backflow preventer with an isosceles trapezoidal cross section on the side near the pressurizing pump area, and the backflow preventer and the backflow preventer cooperate with each other.

[0020] Preferably, a heat insulation component is provided between the anti-corrosion component and the rust removal component. The heat insulation component includes a heating furnace and a blower. A disc-shaped guide steel plate is provided on the side of the heating furnace near the blower. A raised frustum-shaped top surface is provided at the center of the guide steel plate. The top surface is located on the same axis as the rotation axis of the blower.

[0021] An air outlet is provided on the outside of the insulation component, and the air outlet is connected to the lowest point of the guide steel plate.

[0022] Preferably, both the electric telescopic column one and the electric telescopic column two include a movable plug tube and a telescopic cylinder. The movable plug tube includes an extension tube and a fixed tube. One end of the extension tube is fixedly connected to the disc connecting seat. The telescopic cylinder is located inside the movable plug tube. The output end of the telescopic cylinder extends into the extension tube. A long spring sleeve shaft is provided inside the extension tube. The long spring sleeve shaft is located on the periphery of the telescopic cylinder.

[0023] A method for treating the inner surface of oil well pipes includes the following steps: S1, alignment and preparation, transporting the oil pipe to the processing position, fixing the outer wall of the oil pipe to prevent deviation, and adjusting the upper and lower positions of the first conveying rail until the device can enter the inside of the oil pipe.

[0024] S2. Preheating: The pushing device enters the oil pipe and synchronously drives all telescopic support cylinders until multiple telescopic support cylinders can press against the inner wall of the oil pipe. Then, the upper and lower positions of the first conveyor rail are adjusted again to preheat the heat preservation components.

[0025] S3, Sand washing; filling the sand storage layer and storage tank, pushing the surface treatment structure into the oil pipe wall, adjusting the extension length of the electric telescopic column two and the electric telescopic column one, running the main shaft motor at low power, synchronously starting the sandblasting unit, and the propeller slowly and continuously recovering.

[0026] S4. Applying the coating; check the sandblasting effect. If it is not up to standard, repeat S1-S3. Then, the main shaft motor runs on the entire highway. When all the porous coatings come into contact with the inner wall of the oil pipe, the motor stops. Start the pressurized pump to fill the anti-corrosion adhesive. The main shaft motor continues to run at low power, and the thruster extends slowly.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] This invention uses a surface treatment structure to perform rust removal, degreasing, and anti-corrosion spraying on the inner wall of an oil pipe in one go, thus completing a one-time rapid painting of the oil pipe wall.

[0029] The present invention features a sandblasting unit with an adjustable angle, which allows the angle at which the sandblasting gun sprays sand onto the surface to always be at an oblique angle or a right angle, thereby achieving several beneficial effects: 1. The obliquely shot sand has a greater impact and friction effect. When the sand is impacted directly, the rebound of the sand on the impact surface has a certain suppression effect. The obliquely shot sand flow can produce a better scouring effect.

[0030] 2. Since the sand washing is performed on the inside of the pipe wall, a large amount of sand from the direct sand washing will be deposited in the lower horizontal position. The deposited sand and gravel may adhere to the tar and also hinder the operation of the cleaning components. The impact surface of the direct sand washing is perpendicular to the tangent of the pipe wall. The vertical impact causes the sand and gravel to fall in a fan-shaped distribution. When the sand and gravel fall into the cleaned part, it will affect the observation of the actual cleaning effect, and at the same time, it will carry some tar back to the sand-washed position.

[0031] 3. Components that can clean and spray the inside of the pipe wall in one go are usually a unified whole component. During sand washing, the direction of sand spraying is not fixed, which will cause the sand to stick to the adhesive plate, thus affecting the subsequent spraying. Angled sand spraying can greatly reduce this kind of adhesion and improve the treatment effect of the inner pipe wall of the device.

[0032] This invention improves the applicability of a single table treatment component to oil pipelines of different radii by using an automatically rotating and pop-out anti-corrosion component that can adapt to oil pipelines of different radii within a certain range. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the table processing structure of the present invention;

[0034] Figure 2 This is a breakdown diagram of the overall structure of the table processing structure of the present invention;

[0035] Figure 3 This is a side view of the connection structure between the components of the present invention;

[0036] Figure 4 This is a cross-sectional view of the structure connecting the spray plate and the sandblasting unit of the present invention;

[0037] Figure 5 This is a cross-sectional view of the overall structure of the mounting box of the present invention;

[0038] Figure 6 This is a cross-sectional view of the thermal insulation component of the present invention;

[0039] Figure 7This is a cross-sectional view of the electric telescopic pole of the present invention.

[0040] In the diagram: 1. Surface treatment structure; 2. Spindle motor; 3. Pusher; 100. Rust removal assembly; 200. Corrosion protection assembly; 300. Insulation assembly; 400. Lifting structure;

[0041] 101. Sand storage layer; 102. Connecting spray plate; 103. Disc connecting seat; 104. Drive disc; 105. Support spindle; 106. Sandblasting unit; 107. Electric telescopic column one; 108. Axial movable port; 109. Positioning rod; 110. Drive wheel seat; 111. Electric wheel; 112. Telescopic cylinder; 113. Sandblasting gun; 115. Axial connecting seat; 117. Sandblasting connecting pipe; 118. Anti-slip rubber pad; 119. First conveyor rail; 120. Second conveyor rail; 121. Positioning seat; 122. Long spring sleeve shaft; 123. Electric telescopic column two;

[0042] 201. Storage tank; 202. Installation box; 203. Pressurization pump area; 204. Laying plate block; 205. Expansion channel; 206. Pressure stabilizing pipe; 207. Arc-shaped laying plate; 208. Porous membrane; 209. Winding reel; 210. Telescopic guide tube; 211. Backlash ring; 212. Backlash stake;

[0043] 301. Heating furnace; 302. Blower; 303. Guide plate; 304. Air outlet;

[0044] 401. Movable plug tube; 402. Telescopic cylinder; 403. Extending tube; 404. Fixed tube. Detailed Implementation

[0045] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] The present invention will be further described in detail below with reference to the accompanying drawings.

[0049] In one embodiment of the present invention: please refer to the appendix for details. Figure 1-7 The system includes a spindle motor 2, a surface treatment structure 1, a pusher 3, a first conveyor rail 119, and a second conveyor rail 120. One end of the surface treatment structure 1 is connected to the spindle motor 2. The surface treatment structure 1 includes a rust removal component 100 and an anti-corrosion component 200. The rust removal component 100 is connected to the output end of the spindle motor 2, and the anti-corrosion component 200 is connected to the side of the rust removal component 100 away from the spindle motor 2.

[0050] The rust removal component 100 includes a sand storage layer 101, a connecting spray disc 102, a disc connecting seat 103, and a supporting main shaft 105. Multiple electric telescopic columns 107 are provided between the sand storage layer 101 and the connecting disc, and multiple electric telescopic columns 123 are provided between the disc connecting seat 103 and the connecting disc. Multiple axial movable openings 108 are provided on the outer wall of the connecting disc, and a positioning rod 109 is provided inside each axial movable opening 108.

[0051] The supporting spindle 105 is provided with a sandblasting unit 106 around its periphery. The outer wall of the sandblasting unit 106 is provided with multiple axial connecting seats 115. Multiple sandblasting guns 113 are movably connected to the axial connecting seats 115. The sandblasting guns 113 are movably connected to the positioning rod 109. A sandblasting connecting pipe 117 is provided between the sandblasting guns 113 and the sandblasting unit 106. An anti-slip rubber ring is provided between the sandblasting connecting pipe 117 and the axial movable port 108 to prevent displacement. The anti-corrosion component 200 is used to uniformly apply anti-corrosion adhesive to the inner wall of the oil pipe.

[0052] The axial connecting seat 115 and the positioning rod 109 are intersected in rotation. The sandblasting gun 113 is rotatably connected in the middle of the axial connecting seat 115. The front end of the sandblasting gun 113 is slidably connected to the positioning rod 109. The sand storage layer 101, the drive disc 104 and the connecting spray disc 102 are movable and adjustable in the direction of the main shaft axis, which is suitable for the sliding connection angle of the positioning rod 109. There is no direct connection between the connecting disc and the sandblasting unit 106 except for the sandblasting gun 113. The range of motion between them is adjusted by the electric telescopic column one 107 and the electric telescopic column two 123. When the telescopic column one is less than or greater than the telescopic column two, the oblique cutting direction of the sandblasting is towards the main shaft motor 2, which can reduce the adhesion of the precipitates on the plate.

[0053] The anti-corrosion component 200 is used to uniformly apply anti-corrosion adhesive to the inner wall of the oil pipe, and has a certain effect of adapting to the radius of the circular edge.

[0054] Please refer to this carefully. Figure 1-3 The supporting spindle 105 is at the same position as the rotation axis of the spindle motor 2. The sand storage layer 101 is connected to the side of the supporting spindle 105 near the spindle motor 2, and the disc connecting seat 103 is connected to the side of the supporting spindle 105 away from the spindle motor 2.

[0055] The output ends of the electric telescopic column 107 and the electric telescopic column 123 are both connected to both sides of the connecting spray plate 102. A drive disc 104 is provided on one side of the disc connecting seat 103. The side of the drive disc 104 away from the disc connecting seat 103 is connected to the anti-corrosion component 200. The integrated structure can better achieve sandblasting and slow forward movement while rotating, and can reduce the negative force from the inner wall during rotation.

[0056] Please refer to this carefully. Figure 2-5 The drive disc 104 is equipped with multiple telescopic cylinders 112. The output end of a single telescopic cylinder 112 extends out of the drive disc 104 and is connected to a drive wheel seat 110. An electric wheel 111 is provided on the drive wheel seat 110. The multiple telescopic cylinders 112 operate synchronously and extend out simultaneously. Due to the initial diameter positioning, it is convenient to adapt to oil pipes of different radii.

[0057] Please refer to this carefully. Figure 3 The first conveying rail 119 has a lifting structure 400 below it. The conveying directions of the first conveying rail 119 and the second conveying rail 120 are on the same straight line. The pusher 3 is fixed above the first conveying rail 119, and the main shaft motor 2 is connected above the pusher 3.

[0058] The second conveying rail 120 is provided with a positioning seat 121. The upper surface of the positioning seat 121 is composed of two separate symmetrical arc surfaces, and the upper surface of the arc surface is in direct contact with the outer wall of the oil pipe.

[0059] In another embodiment of the invention: please refer to... Figure 1-3 The anti-corrosion component 200 includes a storage tank 201 and a mounting box 202. Both the mounting box 202 and the storage tank 201 are cylindrical boxes. The mounting box 202 is located on the side of the storage tank 201 away from the main spindle motor 2.

[0060] The storage tank 201 is equipped with a pressurizing pump area 203. The outer wall of the pressurizing pump area 203 is uniformly provided with a plurality of dressing plates 204. Adjacent dressing plates 204 are fixedly connected to each other. Each dressing plate 204 is provided with a telescopic channel 205 communicating with the outside. A pressure stabilizing pipe 206 is movably provided inside the telescopic channel 205. One end of the pressure stabilizing pipe 206 extends out of the telescopic channel 205 and is connected to an arc-shaped dressing plate 207. A porous membrane 208 is provided on the side of the arc-shaped dressing plate 207 away from the pressurizing pump area 203.

[0061] The pressurizing pump area 203 is equipped with a winding reel 209, and a plurality of telescopic conduits 210 are connected to the winding reel 209. One end of the telescopic conduit 210 is connected to the pressure stabilizing pipe 206, and the other end is connected to the output port of the pressurizing pump area 203.

[0062] Multiple rubber back pressure rings 211 are evenly arranged inside the pipe wall of the telescopic channel 205 in the opposite direction along the pipeline.

[0063] The pressure stabilizing pipe 206 is provided with a backflow prevention pile 212 with an isosceles trapezoidal cross section on the side near the pressurizing pump area 203. The backflow prevention pile 212 and the backflow prevention ring 211 cooperate with each other.

[0064] In yet another embodiment of the invention: please refer to... Figure 1-3 , Figure 6 A heat insulation component 300 is provided between the anti-corrosion component 200 and the rust removal component 100. The heat insulation component 300 includes a heating furnace 301 and a blower 302. A disc-shaped guide steel plate 303 is provided on the side of the heating furnace 301 near the blower 302. The guide steel plate 303 has a raised frustum-shaped top surface at its center. The top surface is located on the same axis as the rotation axis of the blower 302. An air outlet 304 is provided on the outside of the heat insulation component 300. The air outlet 304 is connected to the lowest point of the guide steel plate 303. The heat insulation component 300 sprays out the generated hot airflow and blows it onto the pipe wall surface, which can help dissolve and soften the residual organic solvent inside the pipe wall and reduce the difficulty of the subsequent sand washing.

[0065] Both the electric telescopic column 107 and the electric telescopic column 123 include a movable plug tube 401 and a telescopic cylinder 402. The movable plug tube 401 includes an extension tube 403 and a fixed tube 404. One end of the extension tube 403 is fixedly connected to the disc connecting seat 103. The telescopic cylinder 402 is located inside the movable plug tube 401, and the output end of the telescopic cylinder 402 extends into the extension tube 403. A long spring sleeve shaft 122 is provided inside the extension tube 403. The long spring sleeve shaft 122 is located on the periphery of the telescopic cylinder 402. The long spring sleeve shaft 122 can adapt to situations where the coordination and synchronization between the two electric telescopic rods are not completely uniform, and is used to provide a certain buffering effect to prevent direct damage to the sandblasting gun 113.

[0066] The processing method of the present invention includes the following steps: S1, alignment and preparation, transporting the oil pipe to the processing position, fixing the outer wall of the oil pipe to prevent deviation, and adjusting the up and down position of the first conveying rail 119 until the device can enter the oil pipe;

[0067] S2. Preheating: The pushing device enters the oil pipe and synchronously drives all telescopic support cylinders until multiple telescopic support cylinders can abut against the inner wall of the oil pipe. Then, the upper and lower positions of the first conveying rail 119 are adjusted again to preheat the heat preservation component 300.

[0068] S3, sand washing; filling sand storage layer 101 and storage tank 201, pushing surface treatment structure 1 into the oil pipe wall, adjusting the extension length of electric telescopic column 2 123 and electric telescopic column 107, low-power operation of main shaft motor 2, synchronously starting sandblasting unit 106, and propeller 3 slowly and continuously recovering.

[0069] S4. Applying the coating; check the sandblasting effect. If it is not up to standard, repeat S1-S3. Then, the main shaft motor 2 runs on the entire highway. When all the porous coatings 208 come into contact with the inner wall of the oil pipe, the motor stops. Start the pressurization pump to fill the anti-corrosion adhesive. The main shaft motor 2 continues to run at low power, and the thruster 3 extends slowly.

[0070] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. An internal surface treatment device for oilfield pipes, characterized in that: Includes a spindle motor, a surface treatment structure, a pusher, a first conveyor rail, and a second conveyor rail; One end of the surface treatment structure is connected to the spindle motor. The surface treatment structure includes a rust removal component and an anti-corrosion component. The rust removal component is connected to the output end of the spindle motor, and the anti-corrosion component is connected to the side of the rust removal component away from the spindle motor. The rust removal assembly includes a sand storage layer, a connecting spray plate, a disc connecting seat, and a supporting spindle. Multiple electric telescopic columns are provided between the sand storage layer and the connecting spray disc, multiple electric telescopic columns are provided between the disc connecting seat and the connecting spray disc, and multiple axial movable ports are provided on the outer wall of the connecting spray disc, with a positioning rod inside each axial movable port. The supporting spindle is equipped with a sandblasting unit on its periphery. The outer wall of the sandblasting unit is provided with multiple axial connecting seats. Multiple sandblasting guns are movably connected to the axial connecting seats. The sandblasting guns are movably connected to the positioning rod. A sandblasting connecting pipe is provided between the sandblasting guns and the sandblasting unit. The anti-corrosion component is used to uniformly apply anti-corrosion adhesive to the inner wall of the oil pipe. The supporting spindle is at the same position as the rotation axis of the spindle motor, the sand storage layer is connected to the side of the supporting spindle closer to the spindle motor, and the disc connecting seat is connected to the side of the supporting spindle away from the spindle motor. The output ends of the electric telescopic column one and the electric telescopic column two are both connected to both sides of the connecting spray plate. A drive disc is provided on one side of the disc connecting seat. The side of the drive disc away from the disc connecting seat is connected to the anti-corrosion component. The drive disc is equipped with multiple telescopic cylinders. The output end of a single telescopic cylinder extends out of the drive disc and is connected to a drive wheel seat. An electric wheel is provided on the drive wheel seat. The multiple telescopic cylinders operate synchronously. The first conveyor rail has a lifting structure below it, the conveying directions of the first conveyor rail and the second conveyor rail are on the same straight line, the pusher is fixed above the first conveyor rail, and the main shaft motor is connected above the pusher; The second conveying rail is provided with a positioning seat, the upper surface of which is composed of two split symmetrical arc surfaces, and the upper surface of the arc surface is in direct contact with the outer wall of the oil pipe. The corrosion protection component includes a storage tank and a mounting tank. Both the mounting tank and the storage tank are cylindrical boxes. The mounting tank is located on the side of the storage tank away from the main spindle motor. The storage tank is equipped with a pressurizing pump area. Multiple coating plates are evenly distributed on the outer wall of the pressurizing pump area. Adjacent coating plates are fixedly connected to each other. Each coating plate has a telescopic channel communicating with the outside. A pressure stabilizing pipe is movably installed inside the telescopic channel. One end of the pressure stabilizing pipe extends out of the telescopic channel and is connected to an arc-shaped coating plate. A porous membrane is provided on the side of the arc-shaped coating plate away from the pressurizing pump area. The pressurizing pump area is equipped with a winding reel, and multiple telescopic conduits are connected to the winding reel. One end of the telescopic conduit is connected to the pressure stabilizing pipe, and the other end is connected to the output port of the pressurizing pump area. Multiple rubber back pressure rings are evenly arranged inside the wall of the telescopic channel in the opposite direction along the pipeline. The pressure stabilizing pipe is provided with a backflow preventer with an isosceles trapezoidal cross section on the side near the pressurizing pump area, and the backflow preventer and the backflow preventer cooperate with each other; A heat insulation component is provided between the anti-corrosion component and the rust removal component. The heat insulation component includes a heating furnace and a blower. A disc-shaped guide steel plate is provided on the side of the heating furnace near the blower. A raised frustum-shaped top surface is provided at the center of the guide steel plate. The top surface is located on the same axis as the rotation axis of the blower. An air outlet is provided on the outside of the insulation component, and the air outlet is connected to the lowest point of the guide steel plate.

2. The internal surface treatment device for oilfield pipes according to claim 1, characterized in that: Both the electric telescopic column one and the electric telescopic column two include a movable plug tube and a telescopic cylinder. The movable plug tube includes an extension tube and a fixed tube. One end of the extension tube is fixedly connected to the disc connecting seat. The telescopic cylinder is located inside the movable plug tube. The output end of the telescopic cylinder extends into the extension tube. A long spring sleeve shaft is provided inside the extension tube. The long spring sleeve shaft is located on the periphery of the telescopic cylinder.

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