Gas well oil pipe heating anti-blocking device and method

Abstract

The gas well oil pipe heating anti-blocking device comprises an electromagnetic heating controller, the input end of the electromagnetic heating controller is connected with a power supply facility, the output end of the electromagnetic heating controller is connected with a plurality of groups of high-frequency electromagnetic wires, and each group of high-frequency electromagnetic wires and the electromagnetic heating controller form a closed loop; a closed loop is formed by the high-frequency electromagnetic wire and the electromagnetic heating controller, and the high-frequency electromagnetic wire is arranged in the oil pipe for heating, so that the problem of oil pipe blockage caused by wax component condensation and hydrate generation is solved; the invention further provides a gas well oil pipe heating anti-blocking method. The method comprises the steps that firstly, the multiple sets of high-frequency electromagnetic wires are tripped into a gas well along with an oil pipe; and 2, a power supply facility is turned on, an electromagnetic heating controller is turned on, high-frequency alternating current is led in, the oil pipe wall is heated and then exchanges heat with a medium on the pipe wall, and the method is easy to operate and does not affect normal operation of the gas well.

Description

Technical Field

[0001] The invention belongs to the technical field of gas well oil pipe equipment, and in particular relates to a gas well oil pipe heating and anti-blocking device. The invention also relates to a gas well oil pipe heating and anti-blocking method using the device. Background Art

[0002] During the production process of a gas well, the natural gas in the formation enters the wellbore. During the lifting process of the wellbore, as the pressure and temperature change, the wax component in the natural gas condenses and precipitates, and adheres to the wall of the oil pipe, causing the oil pipe flow channel to shrink. A local throttling effect is formed at the narrowed flow channel, aggravating the condensation of the wax component and the production of hydrates, which ultimately causes the oil pipe to be blocked and the gas well to stop production.

[0003] In the prior art, for partially blocked gas wells, it is necessary to periodically inject wax removers and antifreeze agents for prevention based on production experience. The recovery is difficult and costly, resulting in a waste of resources, or the wells are shut down for hot washing, and the wax in the oil pipes is washed out with hot water. However, the hot washing operation has the disadvantages of production suspension during operation, oil layer pollution, frequent operation, and high cost. Alternatively, traditional mechanical wax scraping can be used, but the cutter of the mechanical wax scraper is easy to fall off, the salvage cost is expensive, and production is suspended during operation. Therefore, it is urgent to design a gas well oil pipe heating and anti-blocking device that can solve the problem of wax component condensation and hydrate generation, which ultimately causes oil pipe blockage, and does not affect the normal operation of the gas well, and is simple to operate and low in cost. Summary of the invention

[0004] The purpose of the present invention is to provide a gas well oil pipe heating and anti-blocking device, which solves the problem of wax component condensation and hydrate generation, which eventually causes oil pipe blockage.

[0005] Another object of the present invention is to provide a method for preventing gas well oil pipe blockage by heating using the above device.

[0006] The first technical solution adopted by the present invention is a gas well oil pipe heating and anti-blocking device, which includes an electromagnetic heating controller. The input end of the electromagnetic heating controller is connected to the power supply facility, and the output end of the electromagnetic heating controller is connected to a plurality of groups of high-frequency electromagnetic wires. Each group of high-frequency electromagnetic wires and the electromagnetic heating controller form a closed loop.

[0007] The first technical solution of the present invention is also characterized in that:

[0008] The power supply facilities include an energy storage system, the output end of the energy storage system is connected to the input end of the electromagnetic heating controller, and the input end of the energy storage system is respectively connected to a wind power generation device and a solar power generation device, and the connection method is wire connection.

[0009] An inverter mechanism is also arranged between the electromagnetic heating controller and the energy storage system.

[0010] The magnetic heating controller is fixed on the control vertical pole. The control vertical pole comprises a pole body. A base is arranged at the bottom of the pole body. The base is fixed on the ground by bolts.

[0011] The second technical solution adopted by the present invention is a method for preventing gas well oil pipe from being blocked by heating, which adopts the above-mentioned gas well oil pipe heating and blocking prevention device and is implemented according to the following steps:

[0012] Step 1: During the gas well operation, several sets of high-frequency electromagnetic wires are lowered into the gas well along with the oil pipe;

[0013] Step 2: Turn on the power supply facilities, and turn on the electromagnetic heating controller to pass high-frequency alternating current. After the oil pipe wall is heated, heat is exchanged with the medium on the pipe wall. After the medium on the oil pipe wall disappears, turn off the electromagnetic heating controller and the power supply facilities.

[0014] The second technical solution of the present invention is also characterized in that:

[0015] The output voltage of the electromagnetic heating controller is 400V.

[0016] In step 1, several sets of high-frequency electromagnetic wires are placed into the oil pipe. The specific steps are as follows:

[0017] Observe whether there is a packer in the gas wellbore. If there is no packer, connect the blowout preventer and the sealing box to the outside of the casing control valve during the gas well operation, and then pass the high-frequency electromagnetic wire through the sealing box, the blowout preventer, and the casing control valve, fix the high-frequency electromagnetic wire to the outer wall of the oil pipe, and finally lower the high-frequency electromagnetic wire into the wellbore together with the oil pipe;

[0018] When there is a packer in the gas wellbore, during the gas well operation, the high-frequency electromagnetic wire 7 needs to pass through the sealing box, the blowout preventer, the production secondary valve, and the production main valve at the wellhead. During the process of lowering into the wellbore, the high-frequency electromagnetic wire is fixed to the inner wall of the oil pipe and finally lowered into the wellbore with the oil pipe.

[0019] A high-frequency electromagnetic wire hanging clip is also arranged on the high-frequency electromagnetic wire, and the high-frequency electromagnetic wire hanging clip is located outside the sealing box.

[0020] The high-frequency electromagnetic wire is fixed to the side wall of the oil pipe through a fixing clip.

[0021] The beneficial effects of the present invention are:

[0022] The gas well oil pipe heating and anti-blocking device of the present invention forms a closed loop through high-frequency electromagnetic wires and an electromagnetic heating controller, and places the high-frequency electromagnetic wires in the oil pipe for heating, thereby solving the problem of wax component condensation and hydrate generation, which ultimately causes oil pipe blockage; at the same time, the device has the characteristics of simple operation and low cost.

[0023] The gas well oil pipe heating and blocking prevention method of the present invention solves the problem of wax component condensation and hydrate generation, which eventually causes oil pipe blockage, by adopting the gas well oil pipe heating and blocking prevention device, while not affecting the normal operation of the gas well. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a gas well oil pipe heating and anti-blocking device of the present invention.

[0025] In the figure, 1. inverter mechanism, 2. electromagnetic heating controller, 3. control pole, 4. high-frequency electromagnetic wire hanging clip, 5. sealing box, 6. blowout preventer, 7. high-frequency electromagnetic wire, 8. casing control valve, 9. casing, 10. oil pipe, 11. production secondary valve, 12. production main valve, 13. solar power generation device, 14. wind power generation device, 15. energy storage system. DETAILED DESCRIPTION

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

[0027] The first technical solution of the present invention is a gas well oil pipe heating and anti-blocking device, such as Figure 1 As shown, it includes an electromagnetic heating controller 2, the input end of the electromagnetic heating controller 2 is connected to the power supply facility, and the output end of the electromagnetic heating controller 2 is connected to a plurality of groups of high-frequency electromagnetic wires 7, each group of high-frequency electromagnetic wires 7 and the electromagnetic heating controller 2 form a closed loop, and the high-frequency electromagnetic wires 7 are placed in the oil pipe 10 for heating, which solves the problem of wax component condensation and hydrate generation, which eventually causes the blockage of the oil pipe 10. By adopting the electromagnetic heating oil pipe 10, the use of antifreeze is replaced, the problem of oil layer pollution is solved, and the cost is low.

[0028] The electromagnetic heating controller 2 is a unit that converts electrical energy into a high-frequency electromagnetic field. Its working principle is an energy conversion process that converts electrical energy into thermal energy using the principle of electromagnetic induction. When a high-speed changing alternating current passes through the high-frequency electromagnetic wire 7, the high-frequency electromagnetic wire 7 will generate a high-speed changing magnetic field. When the alternating magnetic lines of force in the magnetic field pass through the metal pipe, countless small eddy currents are generated in the pipe wall, causing the pipe wall of the oil pipe 10 to heat up by itself and exchange heat with the medium, thereby achieving the purpose of heating the medium.

[0029] The power supply facility includes an energy storage system 15, the output end of the energy storage system 15 is connected to the input end of the electromagnetic heating controller 2, and the input end of the energy storage system 15 is respectively connected to a wind power generation device 14 and a solar power generation device 13, and the connection method is circuit connection.

[0030] The solar power generation device 13 and the wind power generation device 14 are devices that convert solar energy and wind energy into electrical energy, thereby realizing the clean production of the required electrical energy and meeting the production needs through solar energy and wind energy resources. The energy storage system 15 can store the electrical energy of the solar power generation device 13 and the wind power generation device 14.

[0031] An inverter mechanism 1 is also provided between the electromagnetic heating controller 2 and the energy storage system 15 . The inverter mechanism 1 supplies the electric energy of the energy storage system 15 to the electromagnetic heating controller 2 after voltage conversion.

[0032] The electromagnetic heating controller 2 is fixed on the control pole 3. The control pole 3 includes a pole body. A base is arranged at the bottom of the pole body. The base is fixed on the ground by bolts.

[0033] The second technical solution of the present invention is a method for preventing gas well oil pipe from being blocked by heating, which is implemented by using the above-mentioned gas well oil pipe heating and blocking prevention device according to the following steps:

[0034] Step 1: During the operation of the gas well, the high-frequency electromagnetic wire can be lowered into the gas well along with the oil pipe. The number of groups of the high-frequency electromagnetic wire 7 can be selected accordingly according to the actual situation of the gas well.

[0035] In step 1, the high-frequency electromagnetic wire 7 is lowered into the gas well oil pipe 10 together with the oil pipe. The specific steps are as follows:

[0036] Observe whether there is a packer in the gas wellbore. If there is no packer, set the high-frequency electromagnetic wire 7 inside the annular space of the oil casing. Specifically, during the operation of the gas well, connect the blowout preventer 6 and the sealing box 5 on the outside of the casing control valve 8, and then pass the high-frequency electromagnetic wire 7 through the sealing box 5, the blowout preventer 6, and the casing control valve 8, and fix the high-frequency electromagnetic wire 7 to the outer wall of the oil pipe 10, and finally lower the high-frequency electromagnetic wire 7 into the wellbore together with the oil pipe 10. The function of the sealing box 5 and the blowout preventer 6 is to seal and prevent blowout, so as to ensure that the pressure in the casing will not leak during the production of the gas well, and the casing control valve 8 is in a fully open state.

[0037] When there is a packer in the gas wellbore, the annular space of the oil casing is an independent and pressure-free space, and the outer side of the casing control valve 8 does not need to be equipped with a sealing box 5 or a blowout preventer 6.

[0038] When there is a packer in the wellbore of the gas well, the high-frequency electromagnetic wire 7 is set inside the oil pipe 10. Specifically, during the operation of the gas well, the high-frequency electromagnetic wire 7 needs to pass through the sealing box 5, the blowout preventer 6, the production secondary valve 11, and the production main valve 12 at the wellhead. During the process of lowering into the wellbore, the high-frequency electromagnetic wire 7 is first fixed to the inner wall of the oil pipe 10, and finally lowered into the wellbore with the oil pipe 10. The sealing box 5 and the blowout preventer 6 protect the gas well from leakage during normal production, and the production secondary valve 11 and the production main valve 12 are all in a fully open state.

[0039] Step 2, turn on the power supply facilities, and turn on the electromagnetic heating controller 2 to pass high-frequency alternating current. After the wall of the oil pipe 10 is heated, heat exchange is carried out with the medium on the wall. After the medium on the wall of the oil pipe 10 disappears, turn off the electromagnetic heating controller 2 and the power supply facilities. This method solves the problem of wax component condensation and hydrate generation, which ultimately causes oil pipe blockage. At the same time, the operation is simple and does not affect the normal operation of the gas well.

[0040] The output voltage of the electromagnetic heating controller 2 is 400V.

[0041] A high-frequency electromagnetic wire hanging clip 4 is also provided on the high-frequency electromagnetic wire 7. The high-frequency electromagnetic wire hanging clip 4 is located outside the sealing box 5 and can play a fixing role.

[0042] The high-frequency electromagnetic wire 7 is fixed to the side wall of the oil pipe 10 by means of a fixing clip. The high-frequency electromagnetic wire 7 is fixed to the inner and outer walls of the oil pipe 10 by means of the fixing clip to prevent the high-frequency electromagnetic wire 7 from swinging or falling off at will.

[0043] The gas well oil pipe heating and anti-blocking device of the present invention has the following specific embodiments:

[0044] Example 1

[0045] The gas well oil pipe heating and anti-blocking device of the present invention includes an electromagnetic heating controller 2, the input end of the electromagnetic heating controller 2 is connected to the power supply facility, and the output end of the electromagnetic heating controller 2 is connected to a plurality of groups of high-frequency electromagnetic wires 7, each group of high-frequency electromagnetic wires 7 and the electromagnetic heating controller 2 form a closed loop.

[0046] Example 2

[0047] The gas well oil pipe heating and anti-blocking device of the present invention includes an electromagnetic heating controller 2, the input end of the electromagnetic heating controller 2 is connected to the power supply facility, and the output end of the electromagnetic heating controller 2 is connected to a plurality of groups of high-frequency electromagnetic wires 7, each group of high-frequency electromagnetic wires 7 and the electromagnetic heating controller 2 form a closed loop.

[0048] The power supply facility includes an energy storage system 15, the output end of the energy storage system 15 is connected to the input end of the electromagnetic heating controller 2, and the input end of the energy storage system 15 is respectively connected to a wind power generation device 14 and a solar power generation device 13, and the connection method is circuit connection.

[0049] An inverter mechanism 1 is also provided between the electromagnetic heating controller 2 and the energy storage system 15 .

[0050] Example 3

[0051] The gas well oil pipe heating and anti-blocking device of the present invention includes an electromagnetic heating controller 2, the input end of the electromagnetic heating controller 2 is connected to the power supply facility, and the output end of the electromagnetic heating controller 2 is connected to a plurality of groups of high-frequency electromagnetic wires 7, each group of high-frequency electromagnetic wires 7 and the electromagnetic heating controller 2 form a closed loop.

[0052] The power supply facility includes an energy storage system 15, the output end of the energy storage system 15 is connected to the input end of the electromagnetic heating controller 2, and the input end of the energy storage system 15 is respectively connected to a wind power generation device 14 and a solar power generation device 13, and the connection method is circuit connection.

[0053] An inverter mechanism 1 is also provided between the electromagnetic heating controller 2 and the energy storage system 15 .

[0054] The electromagnetic heating controller 2 is fixed on the control pole 3. The control pole 3 includes a pole body. A base is arranged at the bottom of the pole body. The base is fixed on the ground by bolts.

Claims

1. Gas well oil pipe heating and anti-blocking device, characterized in that: The invention comprises an electromagnetic heating controller (2), wherein the input end of the electromagnetic heating controller (2) is connected to a power supply facility, and the output end of the electromagnetic heating controller (2) is connected to a plurality of groups of high-frequency electromagnetic wires (7), and each group of the high-frequency electromagnetic wires (7) and the electromagnetic heating controller (2) form a closed loop.

2. The gas well oil pipe heating and anti-blocking device according to claim 1 is characterized in that: The power supply facility comprises an energy storage system (15), the output end of the energy storage system (15) is connected to the input end of the electromagnetic heating controller (2), and the input end of the energy storage system (15) is respectively connected to a wind power generation device (14) and a solar power generation device (13), and the connection method adopts wire connection.

3. The gas well oil pipe heating and anti-blocking device according to claim 1 is characterized in that: An inverter mechanism (1) is also provided between the electromagnetic heating controller (2) and the energy storage system (15).

4. The gas well oil pipe heating and anti-blocking device according to claim 1, characterized in that: The electromagnetic heating controller (2) is fixed on a control vertical pole (3); the control vertical pole (3) comprises a pole body; a base is provided at the bottom of the pole body; and the base is fixed on the ground by bolts.

5. A method for preventing gas well oil pipe from being blocked by heating, characterized in that: The gas well oil pipe heating and anti-blocking device according to claim 1 is implemented according to the following steps: Step 1: During the gas well operation process, several sets of high-frequency electromagnetic wires (7) are lowered into the gas well (10) along with the oil pipe; Step 2, turn on the power supply facilities, and turn on the electromagnetic heating controller (2) to pass high-frequency alternating current. After the wall of the oil pipe (10) is heated, heat exchange is carried out with the medium on the wall of the oil pipe (10). After the medium on the wall of the oil pipe (10) disappears, turn off the electromagnetic heating controller (2) and turn off the power supply facilities.

6. The method for preventing gas well oil pipe blockage by heating according to claim 5, characterized in that: The output voltage of the electromagnetic heating controller (2) is 400V.

7. The method for preventing gas well oil pipe blockage by heating according to claim 5, characterized in that: The specific steps of placing a plurality of sets of high-frequency electromagnetic wires (7) into the oil pipe (10) as described in step 1 are as follows: Observe whether there is a packer in the gas well bore. If there is no packer, during the gas well operation, connect the blowout preventer (6) and the sealing box (5) on the outside of the casing control valve (8), then pass the high-frequency electromagnetic wire (7) through the sealing box (5), the blowout preventer (6), and the casing control valve (8), fix the high-frequency electromagnetic wire (7) to the outer wall of the oil pipe (10), and finally lower the high-frequency electromagnetic wire (7) into the bore together with the oil pipe (10); When there is a packer in the wellbore of the gas well, during the operation of the gas well, the high-frequency electromagnetic wire 7 needs to pass through the sealing box (5), the blowout preventer (6), the production secondary valve (11), and the production main valve (12) at the wellhead. During the process of lowering into the wellbore, the high-frequency electromagnetic wire (7) is fixed to the inner wall of the oil pipe (10) and finally lowered into the wellbore along with the oil pipe (10).

8. The method for preventing gas well oil pipe blockage by heating according to claim 7, characterized in that: A high-frequency electromagnetic wire hanging clip (4) is also provided on the high-frequency electromagnetic wire (7), and the high-frequency electromagnetic wire hanging clip (4) is located outside the sealing box (5).

9. The method for preventing gas well oil pipe blockage by heating according to claim 7, characterized in that: The high-frequency electromagnetic wire (7) is fixed to the side wall of the oil pipe (10) via a fixing clip.

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