Electromagnetic valve switch type oil well sound wave oscillation unblocking device

Abstract

The utility model relates to an electromagnetic valve switch type oil well sound wave oscillation plug removal device, belongs to oil production technology technical field, including oil pipe nitrogen car, hose, oil jacket annulus blow -off groove, first pressure relief electromagnetic valve, oil pipe blow -off groove, second pressure relief electromagnetic valve, oil pipe, sleeve, one -way gas valve, electromagnetic control valve, oscillation sounder, dead plug, oil pipe nitrogen car is connected with oil pipe through hose, sleeve is sleeved in the outer wall of oil pipe, and oil pipe forms oil jacket annulus with the inner wall of sleeve, and oil jacket annulus is connected with oil jacket annulus blow -off groove through first pressure relief electromagnetic valve, and oil pipe is connected with oil pipe blow -off groove through second pressure relief electromagnetic valve, and one -way gas valve is fixed in oil pipe, and oscillation sounder is fixed on oil pipe below one -way gas valve, and the end of oil pipe is connected with dead plug, and the below of one -way gas valve and the above of oscillation sounder form control cavity, and the below of oscillation sounder and dead plug form gas storage cavity, the utility model has big energy, and the big radius of plug removal is effectively realized to the downhole plug removal.

Description

Technical Field

[0001] This invention belongs to the field of oil production technology, specifically relating to an electromagnetic valve switching type acoustic oscillation unblocking device for oil wells. Background Technology

[0002] Conventional physical methods for unclogging gas wells include ultrasonic unclogging technology, high-pressure water jet unclogging, plasma pulse unclogging, oscillating cavitation unclogging, liquid flow cavitation unclogging, strong negative pressure unclogging technology, and hydraulic / pressure pulse unclogging. However, existing unclogging methods have disadvantages such as low unclogging energy and small unclogging radius.

[0003] "Air cannon" unblocking is a technology widely used in the coal and cement industries. It has the advantages of strong explosive force, controllability, and low cost, and it is very effective in clearing blockages. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a solenoid valve-operated acoustic oscillation unblocking device for oil wells, comprising a tubing nitrogen truck, a hose, an annulus venting channel, a first pressure relief solenoid valve, a tubing venting channel, a second pressure relief solenoid valve, tubing, casing, a single-flow gas valve, an electromagnetic control valve, an oscillating generator, and a dead plug. The tubing nitrogen truck is connected to the tubing via the hose. The casing is fitted over the tubing, forming an annulus between the tubing and the inner wall of the casing. The annulus is connected to the annulus venting channel via the first pressure relief solenoid valve. The tubing is connected to the annulus venting channel via the second pressure relief solenoid valve. A single-flow gas valve is fixedly installed inside the tubing. An oscillating generator is fixedly installed on the tubing below the single-flow gas valve. The electromagnetic control valve is connected to the oscillating generator. The end of the tubing is connected to the dead plug. A control chamber is formed between the lower part of the single-flow gas valve and the upper part of the oscillating generator. A gas storage chamber is formed between the lower part of the oscillating generator and the upper part of the dead plug.

[0005] Furthermore, a first vent hole is provided on the oil sleeve ring venting groove.

[0006] Furthermore, a second vent hole is provided on the oil pipe vent groove.

[0007] Furthermore, the oscillating sound generator includes an upper connector, a valve cover, a valve body, an outer piston spring, an inner piston, a nozzle body, an inner piston spring, an outer piston hollow column, and a lower connector. The upper connector is threadedly connected to the lower connector via the nozzle body. The upper connector protrudes downward at a first end face at its connection with the nozzle body. The lower connector protrudes downward at a second end face at its connection with the nozzle body. The first end face is connected to the outer piston hollow column via the outer piston spring. The outer piston hollow column is movably connected to the second end face. A fifth end face protrudes downward at the movable connection between the outer piston hollow column and the second end face. The nozzle orifice is located on the nozzle body at the position of the outer piston hollow column. The internal thread of the outer piston hollow column is threadedly connected to one end of the valve body. The other end of the valve body is threadedly connected to the valve cover. The valve cover protrudes downward at a third end face at its connection with the valve body. The third end face is movably connected to one end of the inner piston. One end of the inner piston is directly pressed into the valve body to form an opening. The inner piston is connected to the fourth end face of the valve body via the inner piston spring.

[0008] Furthermore, the upper connector and the valve cover are concentric.

[0009] Furthermore, the lower connector is provided with a hollow inner cavity.

[0010] Furthermore, when the inner piston spring is compressed, the valve cover is in communication with the opening.

[0011] Furthermore, the opening communicates with the lower connector through the inner cavity of the inner piston.

[0012] Furthermore, when the outer piston spring is compressed, the nozzle orifice is connected to the hollow inner cavity of the lower connector.

[0013] The beneficial effects of this invention are as follows: Based on the airflow explosion principle of an air cannon, this patent innovatively applies this technology to the field of petroleum engineering. Addressing the problem of gas well blockage, it designs a mechanical jet deblocking process string. This string only requires adjusting the pressure of the surface nitrogen truck and the opening and closing of the pressure relief valve to achieve high-energy deblocking of the designed gas-producing layer downhole. This string has the following advantages:

[0014] 1. It has a large unblocking energy; when the inflation pressure is 10MPa, the detonation pressure can reach 8MPa.

[0015] 2. It has a large unblocking radius, with an effective working radius of over 15m. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the oscillating sound generator of the present invention.

[0018] The attached figures are labeled as follows:

[0019] 1. Upper connector, 2. Valve cover, 3. Valve body, 4. Outer piston spring, 5. Inner piston, 6. Nozzle body, 61. Nozzle port, 7. Inner piston spring, 8. Outer piston, 9. Lower connector, 14. Oil pipe nitrogen trolley, 15. Hoses, 10. Oscillator, 11. Oil sleeve annulus venting groove, 12. First pressure relief solenoid valve, 111. Oil pipe venting groove, 121. Second pressure relief solenoid valve, 13. First vent hole, 131. Second vent hole, 161. Oil pipe, 20. Sleeve, 17. Single-flow air valve, 18. Solenoid control valve, 10. Oscillator, 19. Dead blockage, 21. First end face, 22. Second end face, 23. Third end face, 24. Fourth end face, 25. Fifth end face, 30. Opening. Detailed Implementation

[0020] A solenoid valve on / off type acoustic oscillation unblocking device for oil wells, such as Figure 1 As shown, the system includes a nitrogen trolley 14 for the oil pipe, a hose 15, an annular venting channel 11, a first pressure relief solenoid valve 12, an annular venting channel 111, a second pressure relief solenoid valve 121, an oil pipe 161, a casing 20, a single-flow air valve 17, a solenoid control valve 18, an oscillating sound generator 10, and a dead plug 19. The nitrogen trolley 14 for the oil pipe is connected to the oil pipe 161 via the hose 15. The casing 20 is fitted over the oil pipe 161, and the inner wall of the oil pipe 161 and the casing 20 form an annular vent. The annular vent is connected to the oil pipe via the first pressure relief solenoid valve 12. The collar is connected to the empty discharge slot 11, and the oil pipe 161 is connected to the oil pipe discharge slot 111 through the second pressure relief solenoid valve 121. A single-flow air valve 17 is fixedly installed inside the oil pipe 161. An oscillating sounder 10 is fixed on the oil pipe 161 below the single-flow air valve 17. An electromagnetic control valve 18 is connected to the oscillating sounder 10. The end of the oil pipe 161 is connected to the dead block 19. A control cavity is formed between the lower part of the single-flow air valve 17 and the upper part of the oscillating sounder 10. An air storage cavity is formed between the lower part of the oscillating sounder 10 and the upper part of the dead block 19.

[0021] The oil sleeve ring venting groove 11 is provided with a first vent hole 13.

[0022] The oil pipe venting groove 111 is provided with a second vent hole 131.

[0023] Among them, such as Figure 2As shown, the oscillating sound generator 10 includes an upper connector 1, a valve cover 2, a valve body 3, an outer piston spring 4, an inner piston 5, a nozzle body 6, an inner piston spring 7, an outer piston hollow column 8, and a lower connector 9. The upper connector 1 is threadedly connected to the lower connector 9 via the nozzle body 6. The upper connector 1 has a first end face 21 protruding downward at its connection with the nozzle body 6, and the lower connector 9 has a second end face 22 protruding downward at its connection with the nozzle body 6. The first end face 21 is connected to the outer piston hollow column 8 via the outer piston spring 4, and the outer piston hollow column 8 is movably connected to the second end face 22. The outer piston hollow cylinder 8 is movably connected to the second end face 22, and a fifth end face 25 protrudes downward. The nozzle port 61 is set on the nozzle body 6 at the position of the outer piston hollow cylinder 8. The internal thread of the outer piston hollow cylinder 8 is threadedly connected to one end of the valve body 3. The other end of the valve body 3 is threadedly connected to the valve cover 2. The valve cover 2 protrudes downward at the connection with the valve body 3, and a third end face 23 protrudes downward. The third end face 23 is movably connected to one end of the inner piston 5. One end of the inner piston 5 is directly pressed to form an opening 30 with the valve body 3. The inner piston 5 is connected to the fourth end face 24 of the valve body 3 through the inner piston spring 7.

[0024] The upper connector 1 and the valve cover 2 are concentric.

[0025] The lower connector 9 is provided with a hollow inner cavity.

[0026] When the inner piston spring 7 is compressed, the valve cover 2 is connected to the opening 30.

[0027] The opening 30 communicates with the lower connector 9 through the inner cavity of the inner piston 5.

[0028] When the outer piston spring 4 is compressed, the nozzle port 61 is connected to the hollow inner cavity of the lower connector 9.

[0029] The well configuration is shown in the diagram above. The inner and outer valves are mechanically restricted in their displacement, allowing only one-way movement: the outer valve moves upward and the inner valve moves downward.

[0030] 1. Steam is injected at the top. The high-pressure gas pushes the inner valve to compress the spring, causing it to move downwards and open. Steam begins to fill the bottom, and the pressure difference between the top and bottom gradually decreases.

[0031] 2. After the upper and lower pressures are balanced, the inner valve closes again under the action of the spring force.

[0032] 3. The pressure relief of the upper solenoid valve creates a pressure difference between the upper and lower parts of the outer valve, and the high-pressure gas at the lower end pushes the outer valve. The compression spring moves upward, the muzzle opens, and the high-pressure gas at the lower end is ejected from the muzzle. After the explosion, the system returns to its initial state after being lowered into the well, and both the inner and outer valves close under the action of the spring force.

[0033] Ground section:

[0034] The nitrogen vehicle, as the medium gas source for unblocking tubing through oscillation, provides high-pressure nitrogen.

[0035] The surface venting pipeline consists of a pressure relief valve, a venting channel, and a matching vent. Under normal circumstances, the pressure relief valve is closed. It is opened when downhole tubing pressure needs to be released or in emergencies, allowing high-pressure nitrogen gas in the tubing to be released via the venting pipeline. The nitrogen truck and venting pipeline are connected to the downhole tubing through the wellhead.

[0036] The underground sections, from top to bottom, are as follows:

[0037] Oil pipes can be sealed to prevent high-pressure gas from entering the system.

[0038] One-way gas valve: The one-way gas valve has a certain opening pressure, generally 2-3 MPa lower than the design unblocking pressure. When gas is injected from top to bottom, it can pass through the one-way gas valve; when it moves from bottom to top, the one-way gas valve closes, sealing off the gas at the lower end. The sealed space from the lower end of the one-way gas valve to the upper end of the oscillator forms the control chamber of the oscillator.

[0039] Electromagnetic control valve: An electromagnetic switch valve that can be remotely and wirelessly controlled via ground signals. When not in use, it is in a closed state, which can seal the high-pressure gas in the control chamber; when in use, it connects the control chamber and the annulus space of the oil jacket, allowing the high-pressure gas in the control chamber to enter the annulus space of the oil jacket, and the control chamber is depressurized.

[0040] Oscillating sound generator: It works in conjunction with a solenoid valve to achieve high-pressure gas explosion. The specific principle will be explained separately below.

[0041] Gas storage oil pipe: The function is the same as the oil pipe described above. It is a conventional oil pipe with a dead plug at the lower end. The space between the lower end of the oscillation generator and the dead plug forms a sealed space, which constitutes the gas storage chamber.

[0042] Oscillator:

[0043] During installation, the upper connector 1 connects to the upper end of the connector column. The upper connector 1, nozzle body 6, and lower connector 9 are threaded together to form the tool housing. The valve cover 2, valve body 3, and outer piston 8 are interconnected to form the outer piston movement unit, which can move up and down. The upper connector 1 and lower connector 9 limit its movement. During assembly, the outer piston spring 4 is in a compressed state. Under normal conditions, the outer piston 8 is in close contact with the lower connector 9, sealing the spray hole on the nozzle body 6. The inner piston 5 is installed in the space formed by the valve cover 2 and valve body 3 and can move up and down. Under normal conditions, the inner piston 5 spring is in a compressed state, and the inner piston 5 is in close contact with the valve cover 2. At this time, the upper space of the upper connector 1 and the lower space of the lower connector 9 are not connected.

[0044] Workflow: Lower the oscillation generator to the designed unblocking depth and connect the ground pipeline.

[0045] 1. Steam injection:

[0046] When the nitrogen truck starts high-pressure steam injection, the high-pressure gas enters the tubing through the wellhead. At this time, the single-flow gas valve opens, and the piston in the oscillator moves down and opens under the action of gas pressure. The gas is injected into the lower gas storage chamber through the oscillator, filling the entire tubing string.

[0047] 2. Stop betting

[0048] After the steam injection pressure reaches the design pressure, the nitrogen truck stops injecting and pressurizes. At this point, the gas pressure at all points in the downhole tubing is equal, the check valve and the inner piston are reset and closed, and the control chamber and gas storage chamber enter a sealed state. The outer piston remains stationary because the gas pressure in the two chambers is balanced.

[0049] 3. Oscillation

[0050] The solenoid valve is opened remotely, and the control chamber is connected to the annulus of the oil casing. The control chamber is depressurized, and the outer piston moves upward under the high pressure of the lower gas storage chamber, exposing the nozzle. The high-pressure gas in the gas storage chamber is ejected into the annulus of the reservoir through the nozzle, forming a gas flow explosion to unblock the blockage and achieve physical unblocking of the well entry zone of the reservoir.

[0051] Repeating the above steps allows for multiple unblocking operations at the same level. By venting the pressure through the venting line, the pressure inside the tubing can be released, and the tubing can be raised and lowered to perform unblocking operations at different levels.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A solenoid valve switching type acoustic oscillation unblocking device for oil wells, characterized in that, The system includes a nitrogen purging unit (14), a hose (15), an annular venting channel (11), a first pressure relief solenoid valve (12), an annular venting channel (111), a second pressure relief solenoid valve (121), an oil pipe (161), a casing (20), a single-flow gas valve (17), a solenoid control valve (18), an oscillating sound generator (10), and a dead plug (19). The nitrogen purging unit (14) is connected to the oil pipe (161) via the hose (15). The casing (20) is fitted over the oil pipe (161), and the inner walls of the oil pipe (161) and the casing (20) form an annular space. The annular space is controlled by the first pressure relief solenoid valve (12). The oil pipe (161) is connected to the oil pipe venting groove (111) via the second pressure relief solenoid valve (121). A single-flow air valve (17) is fixedly installed inside the oil pipe (161). An oscillating sound generator (10) is fixed on the oil pipe (161) below the single-flow air valve (17). An electromagnetic control valve (18) is connected to the oscillating sound generator (10). The end of the oil pipe (161) is connected to the dead block (19). A control cavity is formed between the bottom of the single-flow air valve (17) and the top of the oscillating sound generator (10). An air storage cavity is formed between the bottom of the oscillating sound generator (10) and the top of the dead block (19).

2. The electromagnetic valve switching type acoustic oscillation unblocking device for oil wells according to claim 1, characterized in that, The oil sleeve annular venting spray groove (11) is provided with a first vent hole (13).

3. The electromagnetic valve switching type acoustic oscillation unblocking device for oil wells according to claim 1, characterized in that, A second vent hole (131) is provided on the oil pipe vent groove (111).

4. The electromagnetic valve switching type acoustic oscillation unblocking device for oil wells according to claim 1, characterized in that, The oscillating sound generator (10) includes an upper connector (1), a valve cover (2), a valve body (3), an outer piston spring (4), an inner piston (5), a nozzle body (6), an inner piston spring (7), an outer piston hollow column (8), and a lower connector (9). The upper connector (1) is threadedly connected to the lower connector (9) through the nozzle body (6). The upper connector (1) has a first end face (21) protruding downward at the connection point with the nozzle body (6). The lower connector (9) has a second end face (22) protruding downward at the connection point with the nozzle body (6). The first end face (21) is connected to the outer piston hollow column (8) through the outer piston spring (4). The outer piston hollow column (8) is movably connected to the second end face (22). Next, the fifth end face (25) protrudes downward at the movable connection between the outer piston hollow column (8) and the second end face (22). The nozzle port (61) is set on the nozzle body (6) at the location of the outer piston hollow column (8). The internal thread of the outer piston hollow column (8) is threadedly connected to one end of the valve body (3). The other end of the valve body (3) is threadedly connected to the valve cover (2). The valve cover (2) protrudes downward at the connection with the valve body (3) with the third end face (23). The third end face (23) is movably connected to one end of the inner piston (5). One end of the inner piston (5) is directly pressed to form an opening (30) with the valve body (3). The inner piston (5) is connected to the fourth end face (24) of the valve body (3) through the inner piston spring (7).

5. The electromagnetic valve switching type acoustic oscillation unblocking device for oil wells according to claim 4, characterized in that, The upper connector (1) and the valve cover (2) are concentric.

6. The electromagnetic valve switching type acoustic oscillation unblocking device for oil wells according to claim 4, characterized in that, The lower connector (9) is provided with a hollow inner cavity.

7. The electromagnetic valve switching type acoustic oscillation unblocking device for oil wells according to claim 4, characterized in that, When the inner piston spring (7) is compressed, the valve cover (2) is connected to the opening (30).

8. The electromagnetic valve switching type acoustic oscillation unblocking device for oil wells according to claim 7, characterized in that, The opening (30) is connected to the lower connector (9) through the inner cavity of the inner piston (5).

9. The electromagnetic valve switching type acoustic oscillation unblocking device for oil wells according to claim 4, characterized in that, When the outer piston spring (4) is compressed, the nozzle port (61) is connected to the hollow inner cavity of the lower connector (9).

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