Oil well pump shaft heating paraffin control device
By using a heating mechanism alternately performing electrical heating and gas heating in the oil pump wellbore heating wax protection device, the problem that a single electric heating is difficult to adapt to different wax deposition stages is solved, which extends the equipment life and improves the wax protection effect.
Patent Information
- Application Number
- CN202411462349.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2024-12-31
AI Technical Summary
The existing oil pump wellbore heating and wax protection device is difficult to adapt to the needs of different wax deposition stages through a single electrical heating method, resulting in the wax forming more difficult substances to deal with, affecting the quality of the heavy oil.
A heating mechanism including top, middle and bottom heating components is designed, and the wax that has been precipitated is rapidly heated by electrical heating and gas heating. The precipitated wax is quickly heated up by electrical heating, and the wax is maintained at a stable temperature through gas heating to prevent the wax from precipitating again, combined with The motor-driven heating plate structure and gas heating channel realize flexible selection of heating methods.
It effectively reduces fatigue damage caused by the continuous operation of electric heating, extends the equipment life, reduces maintenance costs, improves the adaptability and wax protection effect to different wax deposition stages, and avoids adverse changes in wax composition.
Smart Images
Figure CN119221867A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of heavy oil development, and more specifically to a wellbore temperature-raising wax prevention device for an oil well pump. Background Art
[0002] An oil well pump is a mechanical device used to extract heavy oil from underground oil wells. The wellbore of the oil well pump is an important channel connecting the underground oil layer with the ground equipment. Heavy oil usually contains wax components. When the temperature drops to a certain level, wax will precipitate from the crude oil and form wax scale on the inner wall of the oil pipe in the wellbore. The principle of temperature increase to prevent wax is to increase the temperature of the fluid in the wellbore to make it higher than the precipitation temperature of wax, thereby preventing the crystallization and deposition of wax.
[0003] The existing oil wellbore heating and wax prevention device usually uses electric heating. A heating cable is installed in the wellbore. The current flows through the cable to generate heat and increase the wellbore temperature. This method heats up quickly, but electric heating requires continuous consumption of a large amount of electricity, resulting in high development costs. In addition, the deposition process of wax in heavy oil is a dynamic process. A single electric heating method is difficult to adapt to the needs of different wax deposition stages. Electric heating will cause the temperature of the oil pipe to continue to rise, and the dissolved wax is prone to composition changes, forming a more difficult-to-handle substance, affecting the quality of the heavy oil. In view of this, we propose a oil wellbore heating and wax prevention device. Summary of the invention
[0004] The purpose of the present invention is to provide a wellbore temperature raising and wax prevention device for a pump to solve the technical problem that a single electric heating method is difficult to adapt to the needs of different wax deposition stages, which easily causes the wax in the heavy oil to form a substance that is more difficult to handle and affects the quality of the heavy oil.
[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a wellbore heating and wax prevention device for a pump, comprising a wellbore body, the wellbore body comprising a casing and an oil pipe, the oil pipe is arranged in the inner cavity of the casing, a heating mechanism is arranged on the circumferential outer wall of the oil pipe, and the heating mechanism consists of a top heating component, a plurality of middle heating components and a bottom heating component;
[0006] The top heating component comprises a cylinder body 1 sleeved on the circumferential outer wall of the oil pipe, the circumferential inner wall of the cylinder body 1 is connected to the circumferential outer wall of the oil pipe through a plurality of connecting plates, and the circumferential outer wall of the cylinder body 1 is connected to the circumferential inner wall of the casing through a plurality of clamping strips; the upper side wall of the cylinder body 1 is connected to a fixed ring plate, a rotating plate is arranged above the fixed ring plate, and the rotating plate is provided with a plurality of arc grooves from top to bottom, and the lower side wall of the cylinder body is arranged with the same structure as the fixed ring plate and the rotating plate; the top of the cylinder body 1 is connected to a top cover plate 1 The bottom of the cylinder is connected to a bottom cover plate, a plurality of heating plates are arranged between the inner wall of the cylinder and the outer wall of the oil pipe, the upper wall of the heating plate is connected to a push-pull plate, the bottom of the push-pull plate is connected to a sliding column, the push-pull plate passes through one side wall of the cylinder and extends above the arc groove, the sliding column is movably arranged inside the arc groove, a structural component symmetrical to the push-pull plate is arranged on a lower side wall of the heating plate, a pipe groove is opened on one side wall of the heating plate, a heating cable is arranged in the pipe groove, and the heating The symmetrical two side walls of the plate 1 are provided with grooves that match the side walls of the connecting plate, a gas heating channel is formed between the inner side walls of the plurality of heating plates 1 and the circumferential outer wall of the oil pipe, and a heat insulation channel is formed between the outer side walls of the plurality of heating plates 1 and the inner side wall of the barrel 1; the heating cable 1 passes through one side wall of the barrel and extends to the top of the barrel 1, and a terminal is arranged on the top of the heating cable 1, and the terminal end of the terminal is connected to an external power supply; the plurality of heating plates 1 have a retracted state and an expanded state; in the retracted state, the inner side walls of the plurality of heating plates 1 are attached to the circumferential outer wall of the oil pipe, and the heating plate 1 is heated by the heating cable 1, and the heating plate 1 quickly transfers the high temperature to the oil pipe to dissolve the wax that has been precipitated from the thick oil on the inner wall of the oil pipe; in the expanded state, the inner side walls of the plurality of heating plates 1 are away from the circumferential outer wall of the oil pipe to form the gas heating channel, and the high-temperature gas is transported into the gas heating channel to continuously maintain the temperature of the oil pipe and prevent the thick oil in the oil pipe from precipitating wax again.
[0007] Preferably, the cylindrical body has two fixed blocks connected to the circumferential outer wall, a fixed plate is arranged between the two fixed blocks, a rotating rod passes through the fixed block from top to bottom, the rotating rod rotates with the fixed block, and the rotating rod is sequentially sleeved with gear one, gear two and gear three from top to bottom, a motor is arranged on the side wall of the fixed plate, the output end of the motor is connected with gear four, and the gear four is meshingly connected with the gear two; a plurality of curved plates arranged in a circular array are integrally connected to the top surface of the fixed ring plate, a plurality of slide grooves one corresponding to the curved plates are provided on the bottom surface of the rotating plate, the rotating plate slides with the curved plate through the slide groove one, and a tooth groove meshingly connected with the gear one is arranged on the circumferential outer wall of the rotating plate.
[0008] Preferably, the circumferential inner wall of the sleeve is provided with a plurality of convex strips corresponding to the positions of the clamping strip, and the side wall of the clamping strip is provided with a second slide groove matching the shape of the convex strip, and the clamping strip is slidably matched with the clamping strip through the second slide groove.
[0009] Preferably, the heating plate 1 is arranged between every two of the connecting plates, and a plurality of the heating plates 1 are arranged in a ring shape with equal intervals, and the heating plate 1 is an arc-shaped plate structure that matches the shape of the outer wall of the oil pipe.
[0010] Preferably, a top surface of the top cover plate is provided with a plurality of exhaust square tubes, the inner cavities of the exhaust square tubes are connected with the inner cavities of the heat insulation channel, a top surface of the top cover plate is also provided with a plurality of air intake pipes, the inner cavities of the plurality of air intake pipes are connected with the inner cavities of the air intake terminals through gas pipes, the inner cavities of the air intake pipes are connected with the inner cavities of the gas heating channel, and the inlet of the air intake terminal is connected to an external gas heating device.
[0011] Preferably, the bottom surface of the bottom cover plate 1 is provided with a plurality of guide square tubes 1 connected to the inner cavity of the heat insulation channel, and the bottom surface of the bottom cover plate 1 is also provided with a plurality of guide square tubes 2 connected to the inner cavity of the gas heating channel.
[0012] Preferably, the top heating component, the middle heating component and the bottom heating component are arranged with the same heating component, the bottom of the top heating component is plugged into and matched with the top of the middle heating component, and the bottom of the middle heating component is plugged into and matched with the top of the bottom heating component.
[0013] Preferably, the middle heating component includes a top cover plate 2, a top of which is provided with a slot 1 that matches the guide square tube 1, and a bottom of which is connected to a heat insulation channel inside the middle heating component; a top of the top cover plate 2 is also provided with a slot 2 that matches the guide square tube 2, and a bottom of which is connected to a gas heating channel inside the middle heating component; the middle heating component includes a heating cable 2 with the same structure as the heating cable 1, a top of the heating cable 2 is connected to a bottom of the heating cable 1, and a structural component identical to the bottom cover plate 1 is arranged at the bottom of the middle heating component.
[0014] Preferably, a structural component identical to the second top cover plate is arranged on the top of the bottom heating component, a second bottom cover plate is arranged at the bottom of the bottom heating component, the oil pipe passes through the bottom surface of the second bottom cover plate, a second cylinder body identical to the first cylinder body and a second heating plate identical to the first heating plate are arranged inside the bottom heating component, the top surface of the second bottom cover plate is connected to the bottom surface of the second cylinder body, a gap channel is formed between the top surface of the second bottom cover plate and the bottom surface of the second heating plate, and the gas heating channel and the heat insulation channel inside the bottom heating component are connected through the gap channel.
[0015] Preferably, the method for using the device comprises the following steps:
[0016] S1, the oil pipe is quickly heated up. The rotation of the motor drives the gear 4 to rotate, which further drives the gear 2 to rotate, so that the rotating rod rotates on the fixed block, and the rotating rod drives the gear 1 and gear 3 to rotate, which further drives the rotating plate to rotate on the curved plate on the top of the fixed ring plate. The arc groove on the rotating plate pushes the sliding column to move inward, driving the push-pull plate to make a straight line movement inward, so that the multiple heating plates 1 move and close to the circumferential outer wall of the oil pipe until the inner side walls of the multiple heating plates 1 are attached to the circumferential outer wall of the oil pipe. The external power supply provides electric energy to the heating cable 1, so that the heating cable 1 generates high temperature, and the heat is transferred to the oil pipe through the heating plate 1, so that the oil pipe is quickly heated up and the wax that has been precipitated from the thick oil on the inner wall of the oil pipe is dissolved;
[0017] S2. Continuously heat the oil pipe. After the oil pipe is quickly heated to the required temperature by electric heating, the motor rotates in the opposite direction to drive the inner wall of the multiple heating plates away from the circumferential outer wall of the oil pipe to form a gas heating channel. Then the electric heating is turned off, and the high-temperature gas is respectively delivered into the multiple intake pipes through the intake terminals by the external gas heating device, and the high-temperature gas is delivered into the gas heating channel through the intake pipe. The high-temperature gas continuously heats and heats the oil pipe in the gas heating channel, making it difficult for the heavy oil in the oil pipe to precipitate wax again.
[0018] S3. Continuously perform heat insulation operation on the cylinder body. After turning off the electric heating, the residual heat of the heating cable 1 will be transferred to the heat insulation channel, forming a heat insulation effect between the inside of the cylinder body 1 and the outside world. After the gas heating operation, the high-temperature gas is continuously transmitted downward through the gas heating channel, and successively enters the gas heating channels inside the top heating component, multiple middle heating components and the bottom heating component. Finally, the high-temperature gas flows from the gap channel at the bottom of the bottom heating component into the heat insulation channel inside it. The high-temperature gas is continuously and successively transmitted upward from the heat insulation channels of the bottom heating component, multiple middle heating components and the top heating component until it enters the exhaust square pipe of the top heating component and is discharged. In the process of the high-temperature airflow continuously flowing through the heat insulation channel, the heat insulation channel can be continuously insulated to reduce the loss of heat inside the cylinder body 1.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] 1. The present invention reduces fatigue damage caused by continuous operation of electric heating by designing alternating heating modes of electric heating and gas heating, thereby extending the service life of the equipment and reducing the maintenance cost of the equipment. At the same time, four heating plates are used, one having a retracted state and an expanded state. In the retracted state, electric heating is used, and in the expanded state, gas heating is used. When wax deposition is more serious, electric heating can quickly increase the temperature and has a better dissolving effect on the precipitated wax. When wax deposition is less, gas heating can maintain a relatively stable temperature and has a better effect on preventing the wax from precipitating again. Alternating the two heating modes can better meet the needs of different wax deposition stages and improve the anti-wax effect.
[0021] 2. The present invention designs the heating mechanism to consist of a top heating component, multiple middle heating components and a bottom heating component. The number of middle heating components can be increased or decreased according to the length of the oil pipe. The bottom of the top heating component and the top of the middle heating component are designed to be plug-in fit, and the bottom of the middle heating component and the top of the bottom heating component are designed to be plug-in fit, which facilitates installation and disassembly, thereby improving the adaptability and adjustability of the heating mechanism to the length of the oil pipe.
[0022] 3. The present invention drives gear four to rotate through the rotation of the motor, and further drives gear two to rotate, so that the rotating rod rotates on the fixed block, and the rotating rod drives gear one and gear three to rotate, and further drives the rotating plate to rotate on the curved plate on the top of the fixed ring plate, and the arc groove on the rotating plate pushes the sliding column to move inward, and drives the push-pull plate to make a linear motion inward, so that the four heating plates one move and close toward the circumferential outer wall of the oil pipe until the inner walls of the four heating plates one are attached to the circumferential outer wall of the oil pipe, and the external power supply provides electric energy to the heating cable one, so that the heating cable one generates high temperature, and the heat is transferred to the oil pipe through the heating plate one, so that the oil pipe is quickly heated up, and the heating plate one is designed as a circular arc plate structure that matches the shape of the outer wall of the oil pipe, so that the four heating plates are closely attached to the outer wall of the oil pipe, thereby improving the effect of heat transfer, and further improving the efficiency of dissolving the wax that has been precipitated from the thick oil on the inner wall of the oil pipe.
[0023] 4. In the present invention, after the oil pipe is quickly heated to the required temperature by electric heating, the motor rotates in the opposite direction to drive the inner wall of multiple heating plates away from the circumferential outer wall of the oil pipe to form a gas heating channel. The electric heating is then turned off, and the high-temperature gas is respectively transported into multiple intake pipes through the intake terminals by an external gas heating device, and the high-temperature gas is transported into the gas heating channel through the intake pipes. By switching from electric heating to gas heating, the high energy consumption of electric heating is reduced and unnecessary electric energy is consumed, and the continuous high temperature of electric heating can be prevented from changing the wax component and forming a substance that is more difficult to handle. The oil pipe is continuously heated and insulated by high-temperature gas in the gas heating channel, which ensures that the thick oil in the oil pipe is difficult to precipitate wax again.
[0024] 5. In the process of heavy oil production, the production situation may change at any time. Changes in oil well production and changes in crude oil properties may require adjustment of the heating method. Electric heating and gas heating are performed alternately. The appropriate heating method can be flexibly selected according to different production conditions to improve the adaptability and flexibility of production. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0026] Figure 2 It is a schematic diagram of the overall structure of the heating mechanism of the present invention;
[0027] Figure 3 It is a schematic diagram of the connection structure between the temperature raising mechanism and the sleeve of the present invention;
[0028] Figure 4 It is a schematic diagram of the structure of the top heating component of the present invention;
[0029] Figure 5 It is a bottom view schematic diagram of the top structure of the top heating component of the present invention;
[0030] Figure 6 It is a schematic diagram of the split structure of the rotating plate and the fixed ring plate of the present invention;
[0031] Figure 7 It is a schematic diagram of the split structure of the top cover plate 1 and the bottom cover plate 1 of the present invention;
[0032] Figure 8 It is a schematic diagram of the internal structure of the top heating component of the present invention;
[0033] Fig. 9 It is a schematic diagram of the internal structure of the top heating component of the present invention;
[0034] Fig.10 It is a schematic diagram of the split structure of the heating plate 1 and the heating cable 1 of the present invention;
[0035] Fig.11 It is a structural schematic diagram of a top cover plate of the present invention;
[0036] Fig.12 It is a structural schematic diagram of a bottom cover plate of the present invention;
[0037] Fig.13 It is a schematic diagram of the bottom structure of the cylinder of the present invention;
[0038] Fig.14 This is a schematic diagram of the top structure of the middle heating component of the present invention;
[0039] Fig.15 It is a schematic diagram of the connection structure between the top heating component and the middle heating component of the present invention;
[0040] Fig.16 This is a schematic diagram of the bottom structure of the bottom heating component of the present invention;
[0041] Fig.17 It is a schematic diagram of the two-split structure of the bottom cover plate of the bottom heating component of the present invention.
[0042] Description of the numbers in the figure:
[0043] 1. Wellbore body; 2. Casing; 3. Oil pipe; 4. Heating mechanism; 5. Top heating component; 6. Middle heating component; 7. Bottom heating component;
[0044] 201. Convex strips;
[0045] 501, cylinder 1; 502, connecting plate; 503, clamping strip; 5031, slide 2; 504, fixing block; 505, fixing plate; 506, motor; 507, rotating rod; 508, gear 1; 509, gear 2; 510, gear 3; 511, gear 4; 512, fixing ring plate; 513, curved plate; 514, rotating plate; 5141, slide 1; 5142, tooth groove; 5143, arc groove; 515, top cover plate 1; 5151, exhaust square tube; 5152, air intake pipe; 5153, gas pipeline; 5154, air intake terminal; 516, bottom cover plate 1; 5161, flow guide square tube 1; 5162, flow guide square tube 2; 517, heating plate 1; 5171, push-pull plate; 5172, sliding column; 5173, pipe groove; 5174, groove; 518, heating cable 1; 5181, terminal block; 519, gas heating channel; 520, heat insulation channel;
[0046] 601, top cover plate 2; 602, card slot 1; 603, card slot 2; 604, heating cable 2;
[0047] 701. Bottom cover plate 2; 702. Cylinder body 2; 703. Heating plate 2. DETAILED DESCRIPTION
[0048] like Figures 1 to 17 As shown, the present invention relates to a wellbore heating and wax prevention device for a pump, comprising a wellbore body 1, the wellbore body 1 comprising a casing 2 and an oil pipe 3, the oil pipe 3 being arranged in the inner cavity of the casing 2, the casing 2 being used to isolate the oil pipe 3 from different strata, the casing 2 being made of steel and having high strength and corrosion resistance, the oil pipe 3 being used to transport heavy oil from the well to the ground, a heating mechanism 4 being arranged on the circumferential outer wall of the oil pipe 3, the heating mechanism 4 being composed of a top heating component 5, a plurality of middle heating components 6 and a bottom heating component 7, heavy oil usually contains wax components, which are easy to precipitate at a low temperature and form wax deposits on the inner wall of the oil pipe 3, thereby affecting the flow and production efficiency of the heavy oil, and the heating mechanism 4 functions to keep the wax in a dissolved state by increasing the temperature of the oil pipe 3, thereby preventing the precipitation and deposition of the wax.
[0049] In an embodiment of the present invention, the top heating component 5 includes a cylinder 501 sleeved on the circumferential outer wall of the oil pipe 3, the circumferential inner wall of the cylinder 501 is connected to the circumferential outer wall of the oil pipe 3 through four connecting plates 502, the four connecting plates 502 are arranged in a ring shape on the circumferential inner wall of the cylinder 501 at equal intervals, the circumferential outer wall of the cylinder 501 is connected to the circumferential inner wall of the casing 2 through a plurality of clamping strips 503, the circumferential inner wall of the casing 2 is provided with three convex strips 201 corresponding to the position of the clamping strips 503, the side wall of the clamping strip 503 is provided with a slide groove 2 5031 matching the shape of the convex strip 201, the clamping strip 503 slides with the clamping strip 503 through the slide groove 2 5031, so as to facilitate fixing and disassembly.
[0050] In the embodiment of the present invention, the outer circumferential wall of the cylinder 501 is connected to two fixed blocks 504, a fixed plate 505 is arranged between the two fixed blocks 504, a rotating rod 507 is passed through the fixed block 504 from top to bottom, the rotating rod 507 rotates with the fixed block 504, the circumferential side wall of the rotating rod 507 is connected to the gear 1 508, the gear 2 509 and the gear 3 510, the side wall of the fixed plate 505 is arranged with a motor 506, the output end of the motor 506 is connected to the gear 4 511, the gear 4 511 is meshed with the gear 2 509, the upper side wall of the cylinder 501 is connected to the fixed ring plate 512, and the top surface of the fixed ring plate 512 is connected to a plurality of circular arrays The curved plate 513 is arranged in sequence, and a rotating plate 514 is arranged above the fixed ring plate 512. A plurality of slide grooves 5141 corresponding to the curved plate 513 are provided on the bottom surface of the rotating plate 514. The rotating plate 514 slides with the curved plate 513 through the slide grooves 5141. The outer wall of the rotating plate 514 is arranged with tooth grooves 5142 meshing with the gear 508. The rotating plate 514 is provided with a plurality of arc grooves 5143 from top to bottom. The lower side wall of the cylinder 501 is arranged with the same structure as the fixed ring plate 512 and the rotating plate 514. The top of the cylinder 501 is connected to a top cover plate 515, and the bottom of the cylinder 501 is connected to a bottom cover plate 516. Four heating plates 517 are arranged between the inner wall of 501 and the outer wall of the oil pipe 3. The heating plate 517 is made of ceramic material and has the advantages of high temperature resistance, good insulation performance, long service life, etc. The upper side wall of the heating plate 517 is connected to a push-pull plate 5171, and the bottom of the push-pull plate 5171 is connected to a slide column 5172. The push-pull plate 5171 penetrates the side wall of the cylinder 501 and extends to the top of the arc groove 5143. The slide column 5172 is movably arranged inside the arc groove 5143. The lower side wall of the heating plate 517 is arranged with a structural component symmetrical to the push-pull plate 5171. The side wall of the heating plate 517 is provided with a pipe groove 5173, which is vertically spiraled on the heating plate 5171. A heating cable 518 is arranged in the pipe groove 5173 on the side wall of the plate 517. The heating cable 518 is the prior art in the example. The heating cable 518 is a special cable used for heating. The symmetrical side walls of the heating plate 517 are provided with grooves 5174 that fit with the side walls of the connecting plate 502. A gas heating channel 519 is formed between the inner walls of the four heating plates 517 and the circumferential outer wall of the oil pipe 3. An insulating channel 520 is formed between the outer walls of the four heating plates 517 and the inner wall of the cylinder 501. The gas heating channel 519 is used to transport high-temperature gas to the interior for heating, and the insulating channel 520 is used to isolate the temperature transfer between the outside and the inside.
[0051] As another embodiment of the present invention, a heating cable 518 penetrates the side wall of the cylinder 501 and extends to the top of the cylinder 501. A wiring terminal 5181 is arranged on the top of the heating cable 518. The end of the wiring terminal 5181 is connected to an external power supply. The four heating plates 517 have a retracted state and an expanded state. In the retracted state, the inner walls of the plurality of heating plates 517 are attached to the circumferential outer wall of the oil pipe 3. The heating plates 517 are heated by the heating cable 518. The heating plates 517 quickly transfer the high temperature to the oil pipe 3 to dissolve the wax that has been precipitated from the heavy oil on the inner wall of the oil pipe 3. In the expanded state, the inner walls of the plurality of heating plates 517 are away from the circumferential outer wall of the oil pipe 3 to form a gas heating channel 519. By transporting high-temperature gas into the gas heating channel 519, the temperature of the oil pipe 3 is continuously maintained to prevent the wax from precipitating again from the heavy oil in the oil pipe 3.
[0052] In the present invention, the rotation of the motor 506 drives the gear four 511 to rotate, and further drives the gear two 509 to rotate, so that the rotating rod 507 rotates on the fixed block 504, and the rotating rod 507 drives the gear one 508 and the gear three 510 to rotate, and further drives the rotating plate 514 to rotate on the curved plate 513 on the top of the fixed ring plate 512, and the arc groove 5143 on the rotating plate 514 pushes the sliding column 5172 to move inward, and drives the push-pull plate 5171 to make a linear movement inward, so that the four heating plates one 517 move and close to the circumferential outer wall of the oil pipe 3 until the inner side walls of the four heating plates one 517 are attached to the circumferential outer wall of the oil pipe 3, and the external power supply provides electric energy to the heating cable one 518, so that the heating cable one 518 generates high temperature, and the heat is transferred to the oil pipe 3 through the heating plate one 517, so that the oil pipe 3 is quickly heated, and the wax that has been precipitated from the thick oil on the inner wall of the oil pipe 3 is dissolved.
[0053] As another embodiment of the present invention, a heating plate 517 is arranged between every two connecting plates 502, and multiple heating plates 517 are arranged in a ring shape with equal intervals. The heating plate 517 is an arc-shaped plate structure that matches the shape of the outer wall of the oil pipe 3. When the four heating plates 517 are in a folded state, they can fit more closely to the outer wall of the oil pipe 3, thereby improving the effect of heat transfer.
[0054] As another embodiment of the present invention, a plurality of exhaust square tubes 5151 are arranged on the top surface of the top cover plate 515, and the inner cavity of the exhaust square tube 5151 is connected to the inner cavity of the heat insulation channel 520. Four air inlet pipes 5152 are also arranged on the top surface of the top cover plate 515, and the inner cavities of the four air inlet pipes 5152 are connected to the inner cavity of the air inlet terminal 5154 through the gas pipeline 5153. The inner cavity of the air inlet pipe 5152 is connected to the inner cavity of the gas heating channel 519, and the inlet terminal 5154 is connected to the external gas heating device. The external gas heating device is the existing technology in the example and will not be described in detail. The bottom surface of the bottom cover plate 516 is provided with a plurality of flow guiding square tubes 5161 connected to the inner cavity of the heat insulation channel 520, and the bottom surface of the bottom cover plate 516 is also provided with a plurality of flow guiding square tubes 5162 connected to the inner cavity of the gas heating channel 519. In the present invention, after the oil pipe 3 is quickly heated to the required temperature by electric heating, the motor 506 is rotated in the opposite direction to drive the inner side walls of the plurality of heating plates 517 away from the circumferential outer wall of the oil pipe 3, and form the gas heating channel 519, and then the electric heating is turned off, and the high temperature gas is respectively transported into the plurality of air inlets through the air inlet terminals 5154 by the external gas heating device. The high-temperature gas is transported into the gas heating channel 519 through the air inlet pipe 5152. The high-temperature gas continuously heats and insulates the oil pipe 3 in the gas heating channel 519, so that the thick oil in the oil pipe 3 is difficult to precipitate wax again. By designing the alternation of the two heating methods of electric heating and gas heating, the fatigue damage caused by the continuous operation of electric heating can be reduced, thereby extending the service life of the equipment and reducing the maintenance cost of the equipment. By designing the alternation of the two heating methods of electric heating and gas heating, the fatigue damage caused by the continuous operation of electric heating can be reduced, thereby extending the service life of the equipment and reducing the maintenance cost of the equipment. At the same time, the four heating plates 517 have a retracted state and an expanded state. In the retracted state, the electric heating method is used, and in the expanded state, the gas heating method is used. When the wax deposition is serious, the electric heating can quickly increase the temperature and has a good dissolving effect on the wax that has been precipitated. When the wax deposition is less, the gas heating can maintain a relatively stable temperature and has a good effect on preventing the wax from precipitating again. The alternating use of the two heating methods can better meet the needs of different wax deposition stages and improve the anti-wax effect.
[0055] As another embodiment of the present invention, the top heating component 5, the middle heating component 6 and the bottom heating component 7 are arranged with the same heating components, the bottom of the top heating component 5 is plugged with the top of the middle heating component 6, the bottom of the middle heating component 6 is plugged with the top of the bottom heating component 7, the middle heating component 6 includes a top cover plate 601, the top of the top cover plate 601 is provided with a card slot 602 that matches the guide square tube 5161, the bottom of the card slot 602 is connected to the insulation channel inside the middle heating component 6, and the top of the top cover plate 601 is also provided with a card slot that matches the guide square tube 5162 The bottom of the card slot 603 is connected to the gas heating channel inside the middle heating component 6. The middle heating component 6 includes a heating cable 604 with the same structure as the heating cable 518. The top of the heating cable 604 is connected to the bottom of the heating cable 518. The bottom of the middle heating component 6 is arranged with a structural component with the same structure as the bottom cover plate 516. The top of the bottom heating component 7 is arranged with a structural component with the same structure as the top cover plate 601. The bottom of the bottom heating component 7 is provided with a bottom cover plate 701. The oil pipe 3 runs through the bottom surface of the bottom cover plate 701. The bottom heating component 7 is arranged with a structural component with the same structure as the cylinder 50 1, a cylinder 702 with the same structure as the first heating plate 517, a heating plate 703 with the same structure as the first heating plate 517, a top surface of the second bottom cover plate 701 is connected to the bottom surface of the second cylinder 702, a gap channel is formed between the top surface of the second bottom cover plate 701 and the bottom surface of the second heating plate 703, and the gas heating channel and the heat insulation channel inside the bottom heating component 7 are connected through the gap channel. In the present invention, after the electric heating is turned off, the residual heat of the heating cable 518 will be transferred to the heat insulation channel 520, forming a heat insulation effect on the inside of the cylinder 501 and the outside world. After the gas heating operation is performed, the high-temperature gas is continuously transmitted downward through the gas heating channel 519 , and enters into the gas heating channels inside the top heating component 5, multiple middle heating components 6 and the bottom heating component 7 in sequence. Finally, the high-temperature gas flows into the insulation channel inside the bottom heating component 7 from the gap channel at the bottom thereof. The high-temperature gas is continuously and sequentially transmitted upward from the insulation channels of the bottom heating component 7, multiple middle heating components 6 and the top heating component 5 until it enters the exhaust square pipe 5151 of the top heating component 5 and is discharged. In the process of the high-temperature airflow continuously flowing through the insulation channel, the insulation channel can be continuously insulated, thereby reducing the loss of heat inside the cylinder 501.
[0056] Working principle: This embodiment provides a device for heating and preventing wax in a wellbore of an oil pump. When in use, the rotation of the motor 506 drives the gear 4 511 to rotate, and further drives the gear 2 509 to rotate, so that the rotating rod 507 rotates on the fixed block 504, and the rotating rod 507 drives the gear 1 508 and the gear 3 510 to rotate, and further drives the rotating plate 514 to rotate on the curved plate 513 at the top of the fixed ring plate 512, and the arc groove 5143 on the rotating plate 514 pushes the sliding column 5172 to move inward, and drives the push-pull plate 5171 to make a straight line movement inward, so that the multiple heating plates 1 517 move and gather toward the circumferential outer wall of the oil pipe 3, until the inner walls of the multiple heating plates 1 517 are attached to the circumferential outer wall of the oil pipe 3, and the external power supply provides electric energy to the heating cable 1 518, so that the heating cable A 518 generates high temperature and transfers the heat to the oil pipe 3 through the heating plate 517, quickly heating the oil pipe 3 and dissolving the wax that has been precipitated from the thick oil on the inner wall of the oil pipe 3. After the oil pipe 3 is quickly heated to the required temperature by electric heating, the motor 506 rotates in the opposite direction to drive the inner walls of the multiple heating plates 517 away from the circumferential outer wall of the oil pipe 3 to form a gas heating channel 519. Then the electric heating is turned off, and the high-temperature gas is respectively transported into the multiple air inlet pipes 5152 through the air inlet terminal 5154 through the external gas heating equipment, and the high-temperature gas is transported into the gas heating channel 519 through the air inlet pipe 5152. The high-temperature gas continuously heats and keeps the oil pipe 3 warm in the gas heating channel 519, making it difficult for the thick oil in the oil pipe 3 to precipitate wax again.
[0057] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.
Claims
1. A wellbore temperature raising and wax prevention device for a pump, comprising a wellbore body (1), wherein the wellbore body (1) comprises a casing (2) and an oil pipe (3), wherein the oil pipe (3) is arranged in the inner cavity of the casing (2), and a temperature raising mechanism (4) is arranged on the circumferential outer wall of the oil pipe (3), characterized in that: The heating mechanism (4) is composed of a top heating component (5), a plurality of middle heating components (6) and a bottom heating component (7); The top heating component (5) comprises a cylinder (501) sleeved on the circumferential outer wall of the oil pipe (3); the circumferential inner wall of the cylinder (501) is connected to the circumferential outer wall of the oil pipe (3) via a plurality of connecting plates (502); the circumferential outer wall of the cylinder (501) is connected to the circumferential inner wall of the casing (2) via a plurality of clamping strips (503); the upper side wall of the cylinder (501) is connected to a fixed ring plate (512); a rotating plate (514) is arranged above the fixed ring plate (512); and the rotating plate (514) is provided with a plurality of arc grooves from top to bottom. (5143), the lower side wall of the cylinder (501) is arranged with a structure identical to the fixed ring plate (512) and the rotating plate (514); the top of the cylinder (501) is connected with a top cover plate (515), the bottom of the cylinder (501) is connected with a bottom cover plate (516), a plurality of heating plates (517) are arranged between the inner side wall of the cylinder (501) and the outer side wall of the oil pipe (3), the upper side wall of the heating plate (517) is connected with a push-pull plate (5171), and the bottom of the push-pull plate (5171) is connected with a sliding column (5172) The push-pull plate (5171) passes through the side wall of the cylinder (501) and extends to the top of the arc groove (5143). The sliding column (5172) is movably arranged inside the arc groove (5143). The lower side wall of the heating plate (517) is provided with a structural component symmetrical to the push-pull plate (5171). The side wall of the heating plate (517) is provided with a pipe groove (5173). A heating cable (518) is arranged in the pipe groove (5173). The symmetrical side walls of the heating plate (517) are provided with a side wall symmetrical to the connecting plate (502). A matching groove (5174) is formed between the inner wall of the plurality of heating plates (517) and the circumferential outer wall of the oil pipe (3), and a heat insulation channel (520) is formed between the outer wall of the plurality of heating plates (517) and the inner wall of the cylinder (501); the heating cable (518) passes through the side wall of the cylinder (501) and extends to the top of the cylinder (501), and a wiring terminal (5181) is provided on the top of the heating cable (518), and the end of the wiring terminal (5181) is connected to an external power supply; The plurality of heating plates (517) have a retracted state and an expanded state. In the retracted state, the inner walls of the plurality of heating plates (517) are attached to the circumferential outer wall of the oil pipe (3). The heating plates (517) are heated by the heating cable (518). The heating plates (517) quickly transfer the high temperature to the oil pipe (3) to dissolve the wax that has been precipitated from the heavy oil on the inner wall of the oil pipe (3). In the expanded state, the inner walls of the plurality of heating plates (517) are away from the circumferential outer wall of the oil pipe (3) to form the gas heating channel (519). By conveying high-temperature gas into the gas heating channel (519), the temperature of the oil pipe (3) is continuously maintained to prevent the wax from precipitating again from the heavy oil in the oil pipe (3).
2. The oil well pump wellbore temperature rise anti-wax device according to claim 1, characterized in that: The outer circumferential wall of the cylinder body 1 (501) is connected to two fixed blocks (504), a fixed plate (505) is arranged between the two fixed blocks (504), a rotating rod (507) penetrates the fixed block (504) from top to bottom, the rotating rod (507) and the fixed block (504) are rotatably matched, the rotating rod (507) is sequentially sleeved with gear 1 (508), gear 2 (509) and gear 3 (510) from top to bottom, a motor (506) is arranged on the side wall of the fixed plate (505), the output end of the motor (506) is connected to gear 4 (511), and the gear 4 (511) is meshedly connected with the gear 2 (509); The top surface of the fixed ring plate (512) is integrally connected with a plurality of curved plates (513) arranged in a circular array, and the bottom surface of the rotating plate (514) is provided with a plurality of slide grooves (5141) corresponding to the curved plates (513), and the rotating plate (514) is slidably matched with the curved plate (513) through the slide grooves (5141), and the circumferential outer wall of the rotating plate (514) is provided with tooth grooves (5142) meshingly connected with the gear (508).
3. A wax prevention device for heating up a wellbore of a wellbore for a pump according to claim 2, characterized in that: The circumferential inner wall of the sleeve (2) is provided with a plurality of convex strips (201) corresponding to the positions of the clamping strip (503), and the side wall of the clamping strip (503) is provided with a second slide groove (5031) matching the shape of the convex strip (201), and the clamping strip (503) is slidably matched with the clamping strip (503) through the second slide groove (5031).
4. A wax prevention device for heating up a wellbore of a wellbore for a pump according to claim 3, characterized in that: The heating plate one (517) is arranged between every two of the connecting plates (502), and a plurality of the heating plates one (517) are arranged in a ring shape with equal spacing. The heating plate one (517) is an arc-shaped plate structure that matches the shape of the outer wall of the oil pipe (3).
5. A wax prevention device for heating up a wellbore of a wellbore for a pump as claimed in claim 4, characterized in that: The top surface of the top cover plate 1 (515) is provided with a plurality of exhaust square tubes (5151), the inner cavities of the exhaust square tubes (5151) are connected to the inner cavities of the heat insulation channel (520), the top surface of the top cover plate 1 (515) is also provided with a plurality of air intake pipes (5152), the inner cavities of the plurality of air intake pipes (5152) are connected to the inner cavities of the air intake terminals (5154) through gas pipelines (5153), the inner cavities of the air intake pipes (5152) are connected to the inner cavities of the gas heating channel (519), and the inlet of the air intake terminal (5154) is connected to an external gas heating device.
6. A wax prevention device for heating up a wellbore of a wellbore for a pump as claimed in claim 5, characterized in that: The bottom surface of the bottom cover plate 1 (516) is provided with a plurality of guide square tubes 1 (5161) connected to the inner cavity of the heat insulation channel (520), and the bottom surface of the bottom cover plate 1 (516) is also provided with a plurality of guide square tubes 2 (5162) connected to the inner cavity of the gas heating channel (519).
7. A wax prevention device for heating up a wellbore of a wellbore for a pump as claimed in claim 6, characterized in that: The top heating component (5), the middle heating component (6) and the bottom heating component (7) are arranged with the same heating components, the bottom of the top heating component (5) is plugged into and matched with the top of the middle heating component (6), and the bottom of the middle heating component (6) is plugged into and matched with the top of the bottom heating component (7).
8. The oil wellbore temperature rise and wax prevention device according to claim 7, characterized in that: The middle heating component (6) comprises a top cover plate 2 (601), the top of which is provided with a slot 1 (602) which matches with the guide square tube 1 (5161), the bottom of which is connected with the heat insulation channel inside the middle heating component (6), the top of which is also provided with a slot 2 (603) which matches with the guide square tube 2 (5162), the bottom of which is connected with the gas heating channel inside the middle heating component (6), the middle heating component (6) comprises a heating cable 2 (604) having the same structure as the heating cable 1 (518), the top of which is connected with the bottom of the heating cable 1 (518), and the bottom of which is arranged with a structural component having the same structure as the bottom cover plate 1 (516).
9. A wax prevention device for heating up a wellbore of a wellbore for a pump as claimed in claim 8, characterized in that: The top of the bottom heating component (7) is arranged with a structural component identical to the top cover plate 2 (601), the bottom of the bottom heating component (7) is provided with a bottom cover plate 2 (701), the oil pipe (3) passes through the bottom surface of the bottom cover plate 2 (701), the bottom heating component (7) is arranged with a cylinder 2 (702) identical to the cylinder 1 (501) and a heating plate 2 (703) identical to the heating plate 1 (517), the top surface of the bottom cover plate 2 (701) is connected to the bottom surface of the cylinder 2 (702), a gap channel is formed between the top surface of the bottom cover plate 2 (701) and the bottom surface of the heating plate 2 (703), and the gas heating channel and the heat insulation channel inside the bottom heating component (7) are connected through the gap channel.
10. A wax prevention device for heating up a wellbore of a wellbore for a pump as claimed in claim 9, characterized in that: The method for using the device comprises the following steps: S1. The oil pipe (3) is heated up quickly. The motor (506) rotates to drive the gear 4 (511) to rotate, which further drives the gear 2 (509) to rotate, so that the rotating rod (507) rotates on the fixed block (504). The rotating rod (507) drives the gear 1 (508) and the gear 3 (510) to rotate, which further drives the rotating plate (514) to rotate on the curved plate (513) on the top of the fixed ring plate (512). The arc groove (5143) on the rotating plate (514) pushes the sliding column (5172) to move inward. The push-pull plate (5171) moves inward in a straight line, so that the plurality of heating plates (517) move and gather toward the circumferential outer wall of the oil pipe (3), until the inner side walls of the plurality of heating plates (517) are attached to the circumferential outer wall of the oil pipe (3), and the heating cable (518) is provided with electric energy through an external power supply, so that the heating cable (518) generates high temperature, and the heat is transferred to the oil pipe (3) through the heating plate (517), so that the oil pipe (3) is heated quickly, and the wax that has been precipitated from the thick oil on the inner wall of the oil pipe (3) is dissolved; S2, the oil pipe (3) is continuously kept warm. After the oil pipe (3) is quickly heated to the required temperature by electric heating, the motor (506) is rotated in the opposite direction to drive the inner wall of the plurality of heating plates (517) away from the circumferential outer wall of the oil pipe (3) to form a gas heating channel (519). Then, the electric heating is turned off, and the high-temperature gas is respectively transported into the plurality of air inlet pipes (5152) through the air inlet terminal (5154) by an external gas heating device, and the high-temperature gas is transported into the gas heating channel (519) through the air inlet pipe (5152). The high-temperature gas in the gas heating channel (519) continuously heats and keeps the oil pipe (3) warm, so that the thick oil in the oil pipe (3) is difficult to precipitate wax again; S3. The cylinder body (501) is continuously insulated. After the electric heating is turned off, the residual heat of the heating cable (518) is transferred to the insulation channel (520), thereby forming an insulation effect between the inside of the cylinder body (501) and the outside. After the gas heating operation is performed, the high-temperature gas is continuously transmitted downward through the gas heating channel (519), and sequentially enters the gas heating channels inside the top heating component (5), the plurality of middle heating components (6) and the bottom heating component (7). Finally, the high-temperature gas flows from the gap channel at the bottom of the bottom heating component (7) into the insulation channel inside it. The high-temperature gas is continuously and sequentially transmitted upward from the insulation channels of the bottom heating component (7), the plurality of middle heating components (6) and the top heating component (5) until it enters the exhaust square pipe (5151) of the top heating component (5) and is discharged. During the process of the high-temperature gas continuously flowing through the insulation channel, the insulation channel can be continuously insulated, thereby reducing the loss of heat inside the cylinder body (501).