Anti-waxing, anti-fouling and viscosity reducing device for oil exploitation

Abstract

The present application relates to the technical field of oil exploitation industry equipment, in particular to a wax-proof, scale-proof and viscosity-reducing device for oil exploitation, which comprises a discharging cylinder, a connecting ring is fixedly installed at the lower end of the discharging cylinder, a movable cylinder is arranged below the connecting ring, a supporting cover is fixedly sleeved on the inner upper end of the discharging cylinder, a pressure relief pipe is arranged through the inner end of the discharging cylinder, the upper end of the pressure relief pipe is fixedly connected with the supporting cover, a stabilizing cylinder is arranged on the side of the movable cylinder away from the connecting ring, a partition device is arranged inside the stabilizing cylinder, an inflatable expansion air bag is arranged, the expansion air bag is inflated by the air in the air storage cylinder during the operation process and adheres to the well wall, thereby effectively isolating the lower area of the well cylinder, preventing the downward infiltration of the dissolving liquid, enhancing the directional jetting effect, improving the wax removal efficiency, meanwhile, the linkage structure of the supporting cover and the flange plate driven by the connecting pipe is used to automatically extend the jetting pipe, ensure that the dissolving liquid is accurately jetted to the wax layer adhesion position, and further improve the accuracy and reliability of the wax removal operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil exploitation industry equipment, in particular to a wax and scale prevention and viscosity reduction device for oil exploitation. BACKGROUND

[0002] During the process of oil exploitation, transportation and storage, wax, inorganic salt scale (such as calcium carbonate, calcium sulfate) and other deposits are often generated, which will adhere to the inner wall of the oil pipe, resulting in the reduction of the inner diameter of the pipe, the increase of flow resistance, and even the blockage of the pipe in severe cases, affecting normal production. At the same time, crude oil contains a certain amount of gum, asphaltene and high molecular compounds, which are prone to viscosity increase under low temperature or high shear conditions, further exacerbating the transportation difficulty.

[0003] After searching, it is found that the prior art with publication number CN203729950U discloses a viscosity reduction, oil increase, wax prevention and scale removal device, which comprises a lower joint, an upper joint connected with the lower joint, a reed seat connected in the lower joint, a nozzle opened at the oil inlet end of the reed seat, a reed connected at the oil outlet end of the reed seat, a spiral seat connected in the upper joint, a plurality of spiral grooves provided on the outer cylindrical surface of the spiral seat, a ball seat provided in the upper joint or the lower joint, and a floating ball provided on the side of the ball seat away from the reed seat. The scheme can effectively reduce the wax dissolved in the crude oil to form crystals, precipitate and accumulate on the oil pipe wall, oil sucker rod and oil pump to form crystalline wax and scale, and slow down the formation of wax crystallization on the oil well pipe wall through speed increase, temperature increase, resonance and spiral advancement.

[0004] Therefore, based on the above search and in combination with the existing technology, in the prior art, the cleaning of the wax layer in the wellbore is often affected by the residual and flow interference of crude oil. Because the crude oil still exists in the wellbore during the wax cleaning process, especially when the liquid level of the crude oil is high, it is easy to mix with the wax layer to form a high-viscosity oil-wax mixture, which adheres to the well wall, thereby affecting the contact and penetration effect of the cleaning liquid. Therefore, the present application proposes a wax and scale prevention and viscosity reduction device for oil exploitation. SUMMARY

[0005] The present application aims to provide a wax and scale prevention and viscosity reduction device for oil exploitation to solve the problems raised in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: the device for preventing wax and scale and reducing viscosity for oil exploitation, comprising a discharging cylinder, a connecting ring is fixedly installed at the lower end of the discharging cylinder, a movable cylinder is arranged below the connecting ring, and the connecting ring is sleeved on the outer surface of the movable cylinder, a supporting cover is fixedly sleeved on the inner side upper end of the discharging cylinder, a connecting pipe is arranged on the side of the supporting cover away from the discharging cylinder, the upper and lower ends of the connecting pipe are provided with sub-mother clamping grooves, so that the connecting pipe can be continuously connected, a pressure relief pipe is arranged at the inner end of the discharging cylinder, the upper end of the pressure relief pipe is fixedly connected with the supporting cover, and a spray cleaning device is arranged between the pressure relief pipe and the discharging cylinder, which is used for cleaning paraffin in the oil well, a stabilizing cylinder is arranged on the side of the movable cylinder away from the connecting ring, and a partition device is arranged in the stabilizing cylinder, which is used for isolating crude oil and preventing the crude oil from flowing and interfering during cleaning operation.

[0007] As a further scheme of the present application, the spray cleaning device comprises a flange disc, the flange disc is fixedly sleeved on the outer surface of the pressure relief pipe, a plurality of movable blocks are arranged on the outer surface of the movable cylinder, and the movable blocks are arranged in a ring shape, the outer surface of each movable block is fixedly connected with an extension rod, a plurality of inclined sliding grooves are formed in the outer surface of the flange disc, and the extension rods are arranged in the inclined sliding grooves, so that the automatic adjustment and linkage control of the components are realized, the device has good expansion and contraction capacity, and is suitable for different diameter wellbores and complex working conditions.

[0008] As a further scheme of the present application, the inner end of each movable block is fixedly installed with a spray pipe, the outer surface of the pressure relief pipe is fixedly sleeved with a shunt pipe, the output end of the shunt pipe is fixedly connected with a plurality of output sleeves, the output sleeves correspond to the spray pipes, one end of each spray pipe close to the output sleeve is fixedly connected with a movable pipe, and the movable pipe is arranged in the inner part of the output sleeve.

[0009] As a further scheme of the present application, the partition device comprises a gas storage cylinder, the gas storage cylinder is fixedly installed at the inner end of the movable cylinder, an extrusion ring is arranged at the inner end of the gas storage cylinder, an expansion air bag is fixedly connected to the end of the gas storage cylinder away from the extrusion ring, a plurality of guide elastic plates are arranged at the inner end of the gas storage cylinder, the guide elastic plates are arranged in a ring shape, and the inner end of the expansion air bag away from the extrusion ring is fixedly connected with the end of the guide elastic plate.

[0010] As a further scheme of the present application, the gas storage cylinder and the extrusion ring are connected through a return spring, a flow guide pipe is arranged at the inner end of the movable cylinder, a plurality of communication sleeves are arranged on the outer surface of the flow guide pipe, and one end of each communication sleeve away from the flow guide pipe is exposed on the outer surface of the movable cylinder, and the crude oil between the movable cylinder and the well wall can flow into the inner part of the flow guide pipe through the communication sleeves.

[0011] As a further scheme of the present application, the upper end of the stabilizing cylinder is sleeved with a guide ring, the inner end of the stabilizing cylinder is fixedly installed with a conical cylinder, the upper end of the conical cylinder is fixedly connected with the bottom end of the flow guide pipe, the outer surface of the guide ring is rotatably installed with a limiting arc plate, and the limiting arc plate is arranged in a ring shape.

[0012] As a further scheme of the present application, the bottom end of the stabilizing cylinder is fixedly connected with an auxiliary ring, the upper end of the auxiliary ring is fixedly installed with a plurality of stabilizing rods, the stabilizing rods are arranged in a ring shape, the outer surfaces of the stabilizing rods are each sleeved with a movable sleeve, the movable sleeve and the stabilizing cylinder are connected through an auxiliary spring, the outer surfaces of the stabilizing rods are each sleeved with a resistance baffle, the resistance baffles are each located inside the conical cylinder, and the resistance baffles move upward along the outer walls of the stabilizing rods under the resistance of the crude oil during the downward movement of the stabilizing cylinder.

[0013] As a further scheme of the present application, the resistance baffles are located below the movable sleeves, the outer surfaces of the movable sleeves are fixedly installed with support blocks, and one end of each support block close to the resistance baffles is rotatably installed with a sliding rod, which can form an effective limiting and guiding structure during operation, improve the stability of the movement of the assembly, prevent deviation or jamming, and enhance the overall reliability of the device.

[0014] As a further scheme of the present application, the outer surfaces of the resistance baffles are provided with limiting grooves, the end portions of the sliding rods are slidably connected in the limiting grooves, the outer surfaces of the stabilizing rods are provided with two turning grooves, the two turning grooves are distributed above and below, and the resistance baffles start to rotate after moving upward to the turning grooves, which can effectively realize the conversion from linear movement to rotary movement, enhance the linkage and control accuracy of the structure, and improve the adaptability and operation efficiency of the device in complex operation environments.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. When the present application is used, the inflatable expansion air bag is expanded by the air in the air storage cylinder during operation, and is attached to the well wall, thereby effectively isolating the lower region of the well cylinder, preventing the infiltration of the dissolving liquid, enhancing the directional injection effect, and improving the wax removal efficiency.

[0017] 2、The application uses the fluid guiding structure composed of the connecting sleeve and the flow guide pipe, so that the diluted wax layer and the crude oil are smoothly discharged in the cleaning process, the wax injection area is prevented from being blocked or remaining in the well, the wax removal efficiency is remarkably improved, the device can realize the layered and segmented cleaning of the wax layer of the well wall in the operation process of the step-by-step submersion, and the device is suitable for the wax scale distribution of different depths;

[0018] 3、In the continuous submersion process, the wax layer attached to the well wall can smoothly sweep the outer surface of the expanded air bag, accumulation and interference are avoided, so that the device submersion is stable and smooth, and movement limitation or structure damage caused by the air bag blockage is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of a wax and scale prevention and viscosity reduction device for oil exploitation;

[0020] Figure 2 It is a structural schematic view of the inside of the discharging cylinder;

[0021] Figure 3 It is a structural schematic view of the position relationship between the pressure relief pipe and the passive surface shell;

[0022] Figure 4 It is a structural schematic view of the flange plate and the movable block;

[0023] Figure 5 It is a structural schematic view of the inside of the movable block;

[0024] Figure 6 It is a structural schematic view of the inside of the movable cylinder;

[0025] Figure 7 It is a structural schematic view of the inside of the expanded air bag;

[0026] Figure 8 It is a structural schematic view of the inside of the stabilizing cylinder;

[0027] Figure 9 It is a structural schematic view of the movable sleeve and the stabilizing rod in the stabilizing cylinder;

[0028] Figure 10 It is a structural schematic view of the position relationship between the stabilizing rod and the resistance baffle;

[0029] Figure 11 It is a structural schematic view of the inside of the movable block; Figure 9

[0030] It is a structural schematic view of the inside of the movable block; Figure 12

[0031] It is a state diagram of the wax and scale prevention and viscosity reduction device for oil exploitation during cleaning operation; Figure 13

[0032] ​In the figure: 1, blanking cylinder; 2, connecting ring; 3, movable cylinder; 4, stabilizing cylinder;

[0033] 11, connecting pipe; 12, transmission pipe;

[0034] 101, support cover; 102, passive face shell; 103, chain belt; 104, flange plate; 105, pressure relief pipe; 106, movable block; 107, triangular block; 108, pressing ring; 109, shunt pipe; 110, extension rod; 111, output sleeve; 112, movable pipe; 113, injection pipe;

[0035] 201, flow guide pipe; 202, communication sleeve; 203, sealing cover; 204, extrusion ring; 205, air reservoir;

[0036] 301, support ring; 302, limit arc plate; 303, expansion air bag; 304, guide elastic plate; 305, steering ring; 306, return spring; 307, auxiliary wheel;

[0037] 401, movable sleeve; 402, stabilizing rod; 403, auxiliary spring; 404, auxiliary ring; 405, resistance baffle; 406, guide ring; 407, conical cylinder; 408, sliding rod; 409, support block; 410, top sheet; 411, steering groove; 412, lock catch; 413, movable buckle. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] Embodiment 1: Please refer to Figures 1-3 The device for preventing wax and scale and reducing viscosity in oil exploitation includes a blanking cylinder 1, a connecting ring 2 fixedly installed at the lower end of the blanking cylinder 1, a movable cylinder 3 arranged below the connecting ring 2, and the connecting ring 2 sleeved on the outer surface of the movable cylinder 3, a limiting block fixedly installed at the inner end of the connecting ring 2, an active groove opened on the outer surface of the movable cylinder 3, the limiting block arranged in the active groove, the connecting ring 2 capable of moving up and down along the outer surface of the movable cylinder 3, and a plurality of through holes opened on the outer surface of the connecting ring 2 and arranged in a ring shape.

[0040] The inner side upper end of the discharging cylinder 1 is fixedly sleeved with a supporting cover 101, the side away from the discharging cylinder 1 of the supporting cover 101 is provided with a connecting pipe 11, the outer surface of the connecting pipe 11 is provided with a weight-reducing hole, the inner side upper end of the discharging cylinder 1 is fixedly welded with a limiting ring, the limiting ring is located above the supporting cover 101, so that the discharging cylinder 1 is prevented from falling off under the action of gravity when the supporting cover 101 is lifted, the upper and lower ends of the connecting pipe 11 are provided with a primary and secondary clamping groove, so that the connecting pipe 11 can be continuously connected, the primary and secondary clamping groove adopts an existing common connection mode, and quick locking is realized through sleeving rotation, the upper end of the supporting cover 101 is also provided with a primary and secondary clamping groove, so that the connecting pipe 11 can be clamped at the upper end of the supporting cover 101, the inner end of the discharging cylinder 1 is provided with a pressure relief pipe 105, the upper end of the pressure relief pipe 105 is fixedly connected with the supporting cover 101, and a spraying device is arranged between the pressure relief pipe 105 and the discharging cylinder 1, so as to clean paraffin in the oil well, the side away from the connecting ring 2 of the movable cylinder 3 is provided with a stabilizing cylinder 4, and the stabilizing cylinder 4 is internally provided with a partition device for isolating crude oil and preventing the crude oil from flowing and interfering during cleaning operation.

[0041] The outer surface of the discharging cylinder 1 is provided with a plurality of rectangular holes, the passive shell 102 is arranged in the rectangular hole, two rotating rods are rotatably arranged at the inner end of the passive shell 102, the outer surface of the two rotating rods is tightly sleeved with a chain belt 103, the inner end of the passive shell 102 is provided with a tensioning wheel, the chain belt 103 is sleeved on the outer surface of the tensioning wheel, so that the chain belt 103 is kept in a tight state, the outer surface of the pressure relief pipe 105 is fixedly welded with a pressing ring 108, one end of the passive shell 102 close to the pressure relief pipe 105 is fixedly welded with a triangular block 107, the triangular block 107 is located below the pressing ring 108, and the inclined surface of the triangular block 107 is in contact with the outer surface of the pressing ring 108, when the pressure relief pipe 105 moves downward, the pressing ring 108 is driven to move, then the pressing ring 108 starts to extrude and push the triangular block 107 during the downward movement, so that the passive shell 102 moves away from the pressure relief pipe 105, and the tensioning wheel makes the chain belt 103 tightly contact the well wall, so that the discharging cylinder 1 always keeps a vertical downward movement track when penetrating into the oil well.

[0042] As shown in Figures 2-5 The spraying device comprises a flange plate 104, the flange plate 104 is fixedly sleeved on the outer surface of the pressure relief pipe 105, the outer surface of the movable cylinder 3 is provided with a plurality of movable blocks 106, and the movable blocks 106 are arranged in a ring shape, the outer surface of the movable block 106 is fixedly welded with an extension rod 110, the outer surface of the flange plate 104 is provided with a plurality of inclined sliding grooves, the extension rod 110 is arranged in the inclined sliding groove, when the flange plate 104 rotates, the movable block 106 is pushed to move away from the pressure relief pipe 105 by the extrusion force of the inclined sliding groove;

[0043] The inner end of the movable block 106 is fixedly provided with a spray pipe 113 through a clamp, the outer surface of the pressure relief pipe 105 is fixedly provided with a shunt pipe 109, and the output end of the shunt pipe 109 is fixedly connected with a plurality of output sleeves 111, the output sleeves 111 correspond to the spray pipe 113, one end of the spray pipe 113 close to the output sleeves 111 is fixedly connected with a movable pipe 112, the movable pipe 112 penetrates the inside of the output sleeve 111, the end of the movable pipe 112 away from the spray pipe 113 is provided with a gap, and the gap of the movable pipe 112 corresponds to the output port of the output sleeve 111 when the movable block 106 moves and drives the spray pipe 113 to move;

[0044] Specifically, the inner end of the blanking cylinder 1 is provided with a transmission pipe 12 for transmitting a dissolving liquid (such as an aromatic hydrocarbon solvent, an alkane solvent, etc.), the transmission pipe 12 is fixedly connected with the shunt pipe 109, and the other end of the transmission pipe 12 is connected with a pressure pump (not shown in the figure), the pressure pump is a mature technology, and details are not repeated here. Meanwhile, the inner end of the blanking cylinder 1 can also be provided with an ultrasonic generator for destroying the aggregation structure of wax crystals by using high-frequency sound waves (20 kHz-1 MHz) and stripping the deposits on the pipe wall by cavitation effect, the outer surface of the connecting ring 2 is also fixedly provided with a permanent magnet, and the 0.5-2T magnetic field generated by the permanent magnet changes the polarity of the wax crystals to make them suspended in the crude oil.

[0045] Embodiment 2: please refer to Figures 4-7 , the wax and scale prevention and viscosity reduction device for oil exploitation is based on the basis of embodiment 1, the blocking device includes a gas storage cylinder 205, the gas storage cylinder 205 is fixedly installed at the inner end of the movable cylinder 3, the inner end of the gas storage cylinder 205 is provided with an extrusion ring 204, the outer surface of the extrusion ring 204 is provided with a sealing rubber ring and is attached to the inner wall of the gas storage cylinder 205 to increase the air tightness, the upper end of the extrusion ring 204 is in contact with the bottom end of the blanking cylinder 1 (not shown in the figure), and the end of the gas storage cylinder 205 away from the extrusion ring 204 is fixedly connected with an expansion air bag 303, the expansion air bag 303 is made of FFKM, UHMWPE or the like and has good corrosion resistance and is not corroded or swollen by any crude oil component;

[0046] The inner end of the gas storage cylinder 205 is provided with a plurality of guide elastic plates 304, the guide elastic plates 304 are arranged in a ring shape, one end of the guide elastic plates 304 away from the extrusion ring 204 is fixedly connected with the inner end of the expansion air bag 303, the other end of the guide elastic plates 304 away from the expansion air bag 303 is fixedly connected with the bottom end of the extrusion ring 204, the expansion air bag 303 is in communication with the gas storage cylinder 205, the extrusion ring 204 moves downward to compress the air in the gas storage cylinder 205, the air is pressed into the inside of the expansion air bag 303, the inside of the expansion air bag 303 is provided with a deflection ring 305, the deflection ring 305 is made of elastic metal material, and the outer surface of the deflection ring 305 is fixedly connected with the outer surface of the guide elastic plate 304;

[0047] The inner end of the gas cylinder 205 is provided with a guide groove, the outer surface of the guide elastic plate 304 is clamped in the inner part of the guide groove, the direction of the guide groove points to the outer side of the stabilizing cylinder 4, so that the guide elastic plate 304 expands outward along the guide groove after being pressed, the steering ring 305 accurately limits the movement track of the plurality of guide elastic plates 304, preventing misalignment, and the guide elastic plate 304 can be more closely attached to the well wall after being moved and assisting the expansion air bag 303;

[0048] The gas cylinder 205 is connected with the extrusion ring 204 through the return spring 306, the inner end of the movable cylinder 3 is provided with the flow guide pipe 201, the outer surface of the flow guide pipe 201 is provided with a plurality of communication sleeves 202, and the end of the communication sleeve 202 away from the flow guide pipe 201 is exposed on the outer surface of the movable cylinder 3, the crude oil between the movable cylinder 3 and the well wall can flow into the inner part of the flow guide pipe 201 through the communication sleeve 202, the flow guide pipe 201 is sleeved on the outer surface of the pressure relief pipe 105, the inner end of the flow guide pipe 201 and the pressure relief pipe 105 are both fixedly sleeved with the sealing cover 203, the outer surface of the sealing cover 203 is provided with a fan-shaped through hole, and the two sealing covers 203 overlap with each other, when the pressure relief pipe 105 rotates, the sealing cover 203 at the inner end of the pressure relief pipe 105 rotates, at this time, the fan-shaped through hole on the outer surface of the sealing cover 203 in the inner part of the flow guide pipe 201 corresponds to each other, at this time, the crude oil can flow from the flow guide pipe 201 into the inner part of the pressure relief pipe 105, when the expansion air bag 303 expands and is attached to the well wall, the cavity below the stabilizing cylinder 4 is cut off from the cavity above the expansion air bag 303, so that the flow of crude oil can be avoided during the cleaning operation.

[0049] The upper end of the stabilizing cylinder 4 is sleeved with the guide ring 406, the guide ring 406 is located below the expansion air bag 303 and is used to limit the downward expansion of the expansion air bag 303, the inner end of the stabilizing cylinder 4 is fixedly installed with the conical cylinder 407, and the upper end of the conical cylinder 407 is fixedly connected with the bottom end of the flow guide pipe 201, the outer surface of the guide ring 406 is rotatably installed with the limiting arc plate 302 through a rotating shaft, the limiting arc plate 302 is arranged in a ring shape and wraps the expansion air bag 303, the outer surface of the limiting arc plate 302 is rotatably installed with the auxiliary wheel 307 through a rotating shaft, when the limiting arc plate 302 rotates away from the flow guide pipe 201, the outer surface of the auxiliary wheel 307 contacts the well wall, preventing the limiting arc plate 302 from being damaged by shearing force due to direct contact with the well wall, and ensuring that the stabilizing cylinder 4 moves up and down more smoothly, the upper end of the stabilizing cylinder 4 is fixedly installed with the supporting ring 301, which is used to prevent the limiting arc plate 302 from rotating too large an angle.

[0050] As Figures 8-11 , Figure 13As shown, the bottom end of the stabilizing cylinder 4 is fixedly welded with an auxiliary ring 404, the upper end of the auxiliary ring 404 is fixedly installed with a plurality of stabilizing rods 402 through bolts, the stabilizing rods 402 are arranged in a ring shape, and the outer surfaces of the stabilizing rods 402 are all sleeved with movable sleeves 401, the movable sleeves 401 and the stabilizing cylinder 4 are all connected through auxiliary springs 403, the outer surfaces of the stabilizing rods 402 are all sleeved with resistance baffles 405, the resistance baffles 405 are all located inside the conical cylinder 407, and the resistance baffles 405 move upward along the outer walls of the stabilizing rods 402 under the resistance of the crude oil during the downward movement of the stabilizing cylinder 4;

[0051] The resistance baffles 405 are located below the movable sleeves 401, the outer surfaces of the movable sleeves 401 are fixedly installed with support blocks 409, one end of the support block 409 close to the resistance baffle 405 is rotatably installed with a sliding rod 408, the outer surface of the resistance baffle 405 is provided with a limiting groove, and the end of the sliding rod 408 is slidably connected in the limiting groove;

[0052] The outer surfaces of the stabilizing rods 402 are provided with two turning grooves 411, the two turning grooves 411 are distributed above and below and staggered with each other (as shown), Figure 10 The upper turning groove 411 points to the resistance baffle 405, and the lower turning groove 411 faces away from the resistance baffle 405, and the resistance baffle 405 moves upward to the turning groove 411 and then starts to rotate, specifically, the resistance baffle 405 is sleeved on the edge of the stabilizing rod 402, first moves to the upper turning groove 411, under the action of the thrust of the crude oil in the well, the edge deviates into the turning groove 411, slides along the diagonal edge to the inside of the lower turning groove 411, at this time, the side of the resistance baffle 405 away from the stabilizing rod 402 rotates towards the upper end of the inside of the conical cylinder 407, at this time, the crude oil can flow more smoothly through the conical cylinder 407 into the flow guide pipe 201.

[0053] The outer surfaces of the movable sleeves 401 are provided with rectangular grooves, the inner end of the stabilizing cylinder 4 is fixedly installed with a rectangular block, the rectangular block is provided in the rectangular groove, so as to avoid the phenomenon of self-rotation of the movable sleeve 401 during the upward movement, and at the same time, the sliding rod 408 limits the phenomenon of lateral deviation of the resistance baffle 405;

[0054] As shown, Figure 9 , Figure 11As shown, the inner end of the guide ring 406 is provided with a plurality of movable holes corresponding to the limiting arc plates 302, the inside of the movable holes is provided with a lock catch 412, and the lock catch 412 is connected with the movable sleeve 401 through the top sheet 410. The end of the limiting arc plate 302 close to the guide ring 406 is fixedly welded with a movable catch 413. After the limiting arc plate 302 returns to the initial state, the movable catch 413 and the lock catch 412 are engaged with each other. When the movable sleeve 401 moves upward, the lock catch 412 is driven to move upward through the top sheet 410. At this time, the movable catch 413 and the lock catch 412 are no longer engaged with each other. At this time, the limiting arc plate 302 can rotate freely.

[0055] The working principle of the present application is as follows:

[0056] Reference Figure 10 When in use, the device is placed in the wellhead. The crude oil has high viscosity, and the well wall has already condensed a thick wax layer. Therefore, when the stabilizing cylinder 4 is inserted into the well, the crude oil attached to the outer surface of the wax layer will enter the inside of the stabilizing cylinder 4 and be connected to the connecting pipe 11 in turn. At this time, the outer surface of the resistance baffle 405 first contacts the crude oil. Under the action of the resistance of the crude oil, the resistance baffle 405 first starts to move upward and then deflects at the turning groove 411. At this time, the movable catch 413 and the lock catch 412 are no longer engaged with each other. At this time, the limiting arc plate 302 can rotate freely.

[0057] At the same time, under the influence of the resistance of the crude oil, the pressure relief pipe 105 moves downward, driving the downward pressing ring 108 to move. Then, the downward pressing ring 108 starts to squeeze and push the triangular block 107 during the downward movement, so that the driven face shell 102 moves away from the pressure relief pipe 105. The tensioning wheel makes the chain belt 103 closely adhere to the well wall, ensuring that the discharging cylinder 1 always maintains a vertical downward movement trajectory when penetrating into the oil well.

[0058] The connecting pipe 11 presses the support cover 101, and then the bottom end of the discharging cylinder 1 pushes the extrusion ring 204 downward. The air in the air cylinder 205 enters the inside of the expansion air bag 303 through the inlet channel. The expansion air bag 303 uniformly expands to the four directions under the action of the air pressure, pushes away the limiting arc plate 302, and then expands along the well hole and forms a continuous adhering surface with the well wall, so as to contact the well wall all around after the expansion is completed, effectively separates the space below the stabilizing cylinder 4 from the upper chamber, and then the solution for diluting the wax layer flows into the inside of the shunt pipe 109 through the transmission pipe 12 by the pressurizing pump, and the support cover 101 is rotated by the connecting pipe 11, the flange plate 104 is driven to rotate by the support cover 101, the movable block 106 moves away from the pressure relief pipe 105, and when the movable block 106 moves and drives the jet pipe 113 to move, the gap of the movable pipe 112 corresponds to the output port of the output sleeve 111. The solution is sprayed out through the jet pipe 113, and the wax removal operation is carried out.

[0059] With the continuous injection of the dissolving liquid, the diluted wax layer and crude oil flow into the inside of the flow conduit 201 through the communication sleeve 202 and then are discharged, so as to avoid the failure of the dissolving liquid to be retained in the dissolving area. The device is submerged for a distance after every ten minutes of the paraffin removal operation, and at the same time, the air inside the expansion air bag 303 is filled. The guide spring plate 304 itself has elasticity, so that during the continuous submersion and cleaning operation, the wax layer attached to the well wall pushes the limiting arc plate 302 to rotate and then immediately restores the open state under the elastic action of the guide spring plate 304 itself. The wax layer will directly sweep the expansion air bag 303 (the expansion air bag 303 is filled with gas and will shrink in volume under pressure). Since the dilution liquid is continuously sprayed, the dilution liquid can continuously fill the chamber above the expansion air bag 303. With the gradual dissolution of the wax layer, the expansion air bag 303 continuously expands under the action of gas pressure, and finally completely adheres to the inner wall of the well hole. Then, the residual wax layer is completely removed.

[0060] After waiting for the completion of the cleaning operation, the feeding cylinder 1 is extracted through the connecting pipe 11. At this time, the auxiliary wheels 307 on the outer surface of the limiting arc plate 302 remain in contact with the well wall to provide a certain supporting force. After the device is completely extracted, the production operation can be restored.

[0061] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the disclosed technical scope, which should be covered within the protection scope of the present application.

Claims

1. A device for paraffin control, scale control and viscosity reduction for oil production, comprising a discharging cylinder (1), characterized in that: The lower end of the blanking cylinder (1) is fixedly installed with a connecting ring (2), the lower portion of the connecting ring (2) is provided with a movable cylinder (3), and the connecting ring (2) is sleeved on the outer surface of the movable cylinder (3), the inner side upper end of the blanking cylinder (1) is fixedly sleeved with a supporting cover (101), the side of the supporting cover (101) away from the blanking cylinder (1) is provided with a connecting pipe (11), the upper and lower ends of the connecting pipe (11) are provided with a primary and secondary clamping groove, so that the connecting pipe (11) can be continuously connected, the inner end of the blanking cylinder (1) is provided with a pressure relief pipe (105), the upper end of the pressure relief pipe (105) is fixedly connected with the supporting cover (101), and a spray cleaning device is arranged between the pressure relief pipe (105) and the blanking cylinder (1) for cleaning paraffin in the oil well, the side of the movable cylinder (3) away from the connecting ring (2) is provided with a stabilizing cylinder (4), and the inside of the stabilizing cylinder (4) is provided with a partition device for isolating crude oil and preventing the crude oil from flowing during cleaning operation. The partition device comprises a gas storage cylinder (205), the gas storage cylinder (205) is fixedly installed at the inner end of the movable cylinder (3), the inner end of the gas storage cylinder (205) is provided with an extrusion ring (204), one end of the gas storage cylinder (205) away from the extrusion ring (204) is fixedly connected with an expansion air bag (303), and the inner end of the gas storage cylinder (205) is provided with a plurality of guide elastic plates (304), the guide elastic plates (304) are arranged in a ring shape, and one end of the guide elastic plates (304) away from the extrusion ring (204) is fixedly connected with the inner end of the expansion air bag (303).

2. The device for paraffin and scale prevention and viscosity reduction for oil production according to claim 1, characterized in that: The spray cleaning device comprises a flange plate (104), the flange plate (104) is fixedly sleeved on the outer surface of the pressure relief pipe (105), the outer surface of the movable cylinder (3) is provided with a plurality of movable blocks (106), and the movable blocks (106) are arranged in a ring shape, the outer surface of the movable blocks (106) is fixedly connected with an extension rod (110), the outer surface of the flange plate (104) is provided with a plurality of inclined sliding grooves, and the extension rod (110) is provided in the inclined sliding grooves.

3. The device for paraffin and scale prevention and viscosity reduction for oil production according to claim 2, characterized in that: The inner end of the movable block (106) is fixedly installed with a spray pipe (113), the outer surface of the pressure relief pipe (105) is fixedly sleeved with a shunt pipe (109), the output end of the shunt pipe (109) is fixedly connected with a plurality of output sleeves (111), the output sleeves (111) correspond to the spray pipes (113), one end of the spray pipe (113) close to the output sleeve (111) is fixedly connected with a movable pipe (112), and the movable pipe (112) is provided in the inside of the output sleeve (111).

4. The device for paraffin and scale prevention and viscosity reduction for oil production according to claim 1, characterized in that: The gas cylinder (205) is connected with the extrusion ring (204) through the reset spring (306), the inner end of the movable cylinder (3) is provided with the flow guide pipe (201), the outer surface of the flow guide pipe (201) is provided with a plurality of communication sleeves (202), and the end of the communication sleeve (202) away from the flow guide pipe (201) is exposed on the outer surface of the movable cylinder (3), and the crude oil between the movable cylinder (3) and the well wall can flow to the inside of the flow guide pipe (201) through the communication sleeve (202).

5. The device for paraffin and scale prevention and viscosity reduction for oil production according to claim 1, characterized in that: The upper end of the stabilizing cylinder (4) is provided with the guide ring (406), the inner end of the stabilizing cylinder (4) is fixedly installed with the conical cylinder (407), the upper end of the conical cylinder (407) is fixedly connected with the bottom end of the flow guide pipe (201), and the outer surface of the guide ring (406) is rotatably installed with the limiting arc plate (302), and the limiting arc plate (302) is arranged in a ring shape.

6. The device for paraffin and scale prevention and viscosity reduction for oil production according to claim 5, characterized in that: The bottom end of the stabilizing cylinder (4) is fixedly connected with the auxiliary ring (404), the upper end of the auxiliary ring (404) is fixedly installed with a plurality of stabilizing rods (402), the stabilizing rods (402) are arranged in a ring shape, the outer surfaces of the stabilizing rods (402) are all sleeved with movable sleeves (401), the movable sleeves (401) and the stabilizing cylinder (4) are connected through the auxiliary springs (403), the outer surfaces of the stabilizing rods (402) are all sleeved with resistance baffles (405), the resistance baffles (405) are all located in the conical cylinder (407), and the resistance baffles (405) move upwards along the outer walls of the stabilizing rods (402) under the action of the resistance of the crude oil during the downward movement of the stabilizing cylinder (4).

7. The device for paraffin and scale prevention and viscosity reduction for oil production according to claim 6, characterized in that: The resistance baffles (405) are located below the movable sleeves (401), the outer surfaces of the movable sleeves (401) are fixedly installed with support blocks (409), and one end of the support block (409) close to the resistance baffle (405) is rotatably installed with a sliding rod (408).

8. The device for paraffin and scale prevention and viscosity reduction for oil production according to claim 7, characterized in that: The outer surface of the resistance baffle (405) is provided with a limiting groove, and the end portion of the sliding rod (408) is slidably connected in the limiting groove. The outer surface of the resistance baffle (405) is provided with a limiting groove, and the end portion of the sliding rod (408) is slidably connected in the limiting groove.

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