Pressure relief device for producing well

Abstract

The utility model discloses a producing well pressure relief device which comprises a pressure relief pipe fixedly communicated with the top end of an oil extraction pipe, the left side of the oil extraction pipe is fixedly communicated with an oil outlet pipe, the oil outlet pipe is connected with an external oil extraction device for oil extraction operation, the top end of the pressure relief pipe is provided with a plugging structure, and the right side of the pressure relief pipe is fixedly communicated with an oil drainage electromagnetic valve. The oil drainage electromagnetic valve is used for discharging oil during pressure relief, the top end of the pressure relief pipe is fixedly communicated with an air leakage electromagnetic valve, and the air leakage electromagnetic valve is used for exhausting air during pressure relief. Through the arrangement of a series of structures, when the internal pressure of the oil extraction pipe is large, plugging of the taper hole can be relieved in an electric driving mode, automatic pressure relief operation is conducted, compared with an elastic tightening oil gas direct extrusion mode in the prior art, the pressure relief stability can be effectively improved, and the safety of oil extraction is improved. The situation that the pressure in the oil extraction pipe does not meet the pressure relief requirement and is automatically relieved can be effectively avoided, and normal oil extraction operation is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well pressure relief, in particular to an oil well pressure relief device. Background Art

[0002] An oil well is a hole drilled by a drilling method. Generally, after the oil well reaches the oil layer, an oil layer casing is lowered, and oil well cement is injected into the annular space between the casing and the well wall to maintain the well wall and seal the oil, gas and water layers. The oil layer is then opened with a perforating gun according to the requirements of oil field development. At present, in the production process of oil wells, most of the oil wellheads use control valves to control the oil in the formation. However, in the process of oil production, the internal pressure of the oil well is high, and the oil pipe is subjected to high pressure, which may cause blowouts or oil pipe bursts, posing a threat to oil production safety. For this purpose, application number: 202323435728.0 discloses an oil well pressure relief device, which is arranged at the wellhead of the oil well. The oil well is provided with an oil pipe, and the oil pipe is provided with a pressure relief device. An oil outlet pipe is provided, comprising: a blowout prevention pipe, an oil drain pipe, a mounting shell, a control plug, an annular seat, and an exhaust assembly, wherein the inlet of the blowout prevention pipe is connected to the outlet of the oil production pipe; the oil drain pipe is provided on the blowout prevention pipe; the mounting shell is symmetrically arranged on the outside of the blowout prevention pipe, a telescopic rod is provided inside the mounting shell, and a buffer spring is sleeved on the outer wall of the telescopic rod; the control plug is provided at the protruding end of the telescopic rod; the annular seat is provided on the inner wall of the blowout prevention pipe, and the inner wall of the annular seat is slidably connected to the control plug; the exhaust component is provided in the blowout prevention pipe and above the control plug, thereby solving the problem that the internal pressure of the oil well is high and a blowout or oil outlet pipe burst may occur;

[0003] The oil well pressure relief device disclosed in the above patent relieves pressure by squeezing a control plug when the pressure in the oil well is high, and the control plug is tightened by the elastic force of a buffer spring. The tightening method using the elastic force of a buffer spring has low stability. After long-term use, the buffer spring suffers from elastic fatigue and its elastic force weakens, which can easily cause automatic pressure relief when the pressure in the oil well does not meet the pressure relief requirement, thereby affecting normal oil production operations. Based on the above situation, the above patent is improved, and the present application proposes an oil well pressure relief device. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a pressure relief device for an oil well.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] and a tube connecting the dischar e side of the pump with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug An electric telescopic rod is fixedly connected, and the top end of the output shaft of the electric telescopic rod is fixedly connected to the pressure control and sealing mechanism. The electric telescopic rod is used to vertically drive the pressure control and sealing mechanism. An air pressure sensor is fixedly connected to the bottom left side of the pressure relief pipe, and the detection end of the air pressure sensor extends into the pressure relief pipe and is located below the mounting seat. The air pressure sensor detects the pressure inside the oil production pipe through the pressure relief pipe. A PLC controller is fixedly connected to the left side of the pressure relief pipe. The PLC controller is electrically connected to the air pressure sensor, the electric telescopic rod, the pressure control and sealing mechanism, the oil drain solenoid valve and the air discharge solenoid valve. The PLC controller receives the air pressure value of the air pressure sensor to control the electric telescopic rod, the oil drain solenoid valve and the air discharge solenoid valve. The control principle is a basic programming setting CNC control method well known to those skilled in the art, which can be achieved by CNC programmers editing the corresponding control numerical program. They are all conventional means or common knowledge and will not be elaborated here.

[0007] Preferably, the filtering mechanism includes an activated carbon filter bonded and fixed to the bottom end of the air release solenoid valve, a filter bonded and fixed to the bottom of the activated carbon filter, an exhaust hole is opened on the top inner wall of the pressure relief pipe, the activated carbon filter and the filter are both located in the exhaust hole, and the filter and the activated carbon filter are respectively used to adsorb and purify dust impurities and harmful substances in the gas.

[0008] Preferably, the pressure control and sealing mechanism includes a conical block movably sleeved in the conical hole, the conical block is used to seal the conical hole, the top of the conical block is fixedly connected to a vertical rod, a moving rod is slidably installed on the right inner wall of the pressure relief pipe, the bottom left side of the moving rod is fixedly connected to the top of the output shaft of the electric telescopic rod, a pressure sensor is embedded and fixed at the bottom of the moving rod, the bottom of the pressure sensor is the detection end and is fixedly connected to the top of the vertical rod, the pressure sensor is used to detect the extrusion force during movement, the outer adhesive sleeve of the vertical rod is provided with an elastic protective cover, the top of the elastic protective cover is adhesively fixed to the bottom of the moving rod, the setting of the elastic protective cover can shield the pressure sensor to prevent oil from adhering to the pressure sensor, and the pressure sensor is electrically connected to the PLC controller.

[0009] Preferably, a T-shaped slide rail is fixedly connected to the right inner wall of the pressure relief pipe, and a T-shaped slide groove with openings at the top and bottom is opened at the right end of the movable rod. The T-shaped slide rail is slidably connected to the T-shaped slide groove, and the T-shaped slide rail has a vertical guiding effect on the movable rod.

[0010] Preferably, the fixing sleeve on the air-deflation solenoid valve is provided with a mounting ring, and four threaded grooves are opened on the top of the pressure relief pipe, and the threaded sleeve in the threaded groove is provided with a T-shaped fixing bolt, and the threaded sleeve of the mounting ring is provided on the four T-shaped fixing bolts. The T-shaped fixing bolts and the mounting ring cooperate with each other to achieve a fixed connection between the air-deflation solenoid valve and the pressure relief pipe. The outer bottom of the air-deflation solenoid valve is bonded and covered with a sealing rubber sleeve, and the outer side of the sealing rubber sleeve is in close contact with the inner wall of the exhaust hole, and the sealing rubber sleeve is used to achieve a sealed connection between the air-deflation solenoid valve and the exhaust hole. The bottom of the air-deflation solenoid valve is bonded and fixed with a male Velcro, and the top of the activated carbon filter is bonded and fixed with a female Velcro, and the male Velcro and the female Velcro are adhered to each other, and the activated carbon filter is bonded and fixed to the bottom of the air-deflation solenoid valve through the male Velcro and the female Velcro.

[0011] Preferably, a movable hole is opened on the top inner wall of the installation box, and a sealing ring is fixed in the movable hole. The inner wall of the sealing ring is in movable contact with the outer side of the extended end of the electric telescopic rod, and the sealing between the movable hole and the extended end of the electric telescopic rod is achieved by the sealing ring.

[0012] Preferably, a battery is fixedly connected to the top inner wall of the installation box, the battery is electrically connected to the electric telescopic rod and the PLC controller, and the battery supplies power to the electric telescopic rod and the PLC controller.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] 1. Through the coordination of the air pressure sensor, mounting base, tapered hole, pressure-controlled plugging mechanism, electric telescopic rod and PLC controller, when the pressure inside the oil production pipe is high, the tapered plug can be electrically driven to move upward to release the blockage of the tapered hole. At the same time, the pressure relief operation is performed in conjunction with the settings of the air relief solenoid valve and the oil relief solenoid valve.

[0015] 2. Through the setting of the filtering mechanism, impurities and harmful substances in the exhaust gas can be filtered and adsorbed, reducing the pollution of the gas exhaust to the environment;

[0016] Through the arrangement of a series of structures, the utility model can release the blockage of the tapered hole by electric drive to perform automatic pressure relief operation when the internal pressure of the oil production pipe is relatively high. Compared with the elastic tightening and direct squeezing of oil and gas in the prior art, the pressure relief stability can be effectively improved, and the situation where the internal pressure of the oil production pipe does not reach the pressure relief requirement and the automatic pressure relief is avoided can be effectively avoided, without affecting the normal oil production operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of an oil well pressure relief device proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of an oil well pressure relief device proposed by the utility model;

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A.

[0020] In the figure: 100, oil production pipe; 101, oil outlet pipe; 1, pressure relief pipe; 2, oil leakage solenoid valve; 3, air pressure sensor; 4, mounting base; 5, conical hole; 6, conical block; 7, vertical rod; 8, moving rod; 9, pressure sensor; 10, elastic protective cover; 11, mounting box; 12, electric telescopic rod; 13, PLC controller; 14, battery; 15, air leakage solenoid valve; 16, exhaust hole; 17, filter; 18, activated carbon filter. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-3, a pressure relief device for an oil well, including a pressure relief pipe 1 connected and fixed to the top of an oil production pipe 100, an oil outlet pipe 101 is connected and fixed to the left side of the oil production pipe 100, and the oil outlet pipe 101 is connected to an external oil production device for oil production operation, and the top of the pressure relief pipe 1 is set as a blocking structure, and the right side of the pressure relief pipe 1 is connected and fixed with an oil leakage solenoid valve 2, which is used to discharge oil during pressure relief, and the top of the pressure relief pipe 1 is connected and fixed with a gas relief solenoid valve 15, wherein a mounting ring is provided on the fixing sleeve of the gas relief solenoid valve 15, and four threaded grooves are opened at the top of the pressure relief pipe 1, and a T-shaped fixing bolt is provided on the threaded sleeve in the threaded groove. The threaded sleeve of the mounting ring is provided on the four T-shaped fixing bolts, and the T-shaped fixing bolts and the mounting ring cooperate with each other to achieve a fixed connection between the gas relief solenoid valve 15 and the pressure relief pipe 1, and the gas relief solenoid valve 15 is used to exhaust during pressure relief, and a filtering mechanism is bonded and fixed to the bottom end of the gas relief solenoid valve 15, and the filtering mechanism The activated carbon filter 18 is bonded and fixed to the bottom end of the deflation solenoid valve 15, wherein the bottom of the deflation solenoid valve 15 is bonded and fixed with a male Velcro, and the top of the activated carbon filter 18 is bonded and fixed with a female Velcro, the male Velcro and the female Velcro are adhered to each other, and the activated carbon filter 18 is bonded and fixed to the bottom of the deflation solenoid valve 15 by the male Velcro and the female Velcro, and a filter screen 17 is bonded and fixed to the bottom of the activated carbon filter 18, an exhaust hole 16 is opened on the top inner wall of the pressure relief pipe 1, and the activated carbon filter 18 and the filter screen 17 are both located in the exhaust hole 16, wherein the outer bottom of the deflation solenoid valve 15 is bonded and covered with a sealing rubber sleeve, the outer side of the sealing rubber sleeve is in close contact with the inner wall of the exhaust hole 16, and the sealing rubber sleeve is used to achieve a sealed connection between the deflation solenoid valve 15 and the exhaust hole 16, and the filter screen 17 and the activated carbon filter 18 are respectively used for adsorbing and purifying dust, impurities and harmful substances in the gas;

[0023] The pressure relief pipe 1 is provided with a fixed sleeve with a mounting seat 4, and a tapered hole 5 is opened on the top of the mounting seat 4. A movable sleeve in the tapered hole 5 is provided with a pressure control sealing mechanism, and the pressure control sealing mechanism is slidably installed on the right inner wall of the pressure relief pipe 1. A mounting box 11 with an opening on the left side is embedded and fixed on the left side of the pressure relief pipe 1. An electric telescopic rod 12 is fixedly connected to the top inner wall of the mounting box 11, and the top of the output shaft of the electric telescopic rod 12 is fixedly connected to the pressure control sealing mechanism. The pressure control sealing mechanism includes a tapered blocking block 6 movably sleeved in the tapered hole 5, and the tapered blocking block 6 is used to block the tapered hole 5. A vertical rod 7 is fixedly connected to the top of the tapered blocking block 6, and a moving rod 8 is slidably installed on the right inner wall of the pressure relief pipe 1, wherein a T-shaped slide rail is fixedly connected to the right inner wall of the pressure relief pipe 1, and a T-shaped slide groove with openings on the top and bottom is opened at the right end of the moving rod 8. The T-shaped slide rail is slidably connected to the T-shaped slide groove, and the T-shaped slide rail plays a vertical role in supporting the moving rod 8. To achieve the guiding effect, the left side of the bottom of the mobile rod 8 is fixedly connected to the top of the output shaft of the electric telescopic rod 12, wherein a movable hole is provided on the inner wall of the top of the mounting box 11, and a sealing ring is provided in the fixed sleeve of the movable hole. The inner wall of the sealing ring is in movable contact with the outer side of the extended end of the electric telescopic rod 12, and the sealing between the movable hole and the extended end of the electric telescopic rod 12 is achieved by the sealing ring. A pressure sensor 9 is embedded and fixed at the bottom of the mobile rod 8, wherein a mounting groove for fixedly installing the pressure sensor 9 is provided at the bottom of the mobile rod 8. The bottom of the pressure sensor 9 is the detection end and is fixedly connected to the top of the vertical rod 7. The pressure sensor 9 is used to detect the extrusion force during movement. The outer adhesive sleeve of the vertical rod 7 is provided with an elastic protective cover 10, and the top of the elastic protective cover 10 is bonded and fixed to the bottom of the mobile rod 8. The setting of the elastic protective cover 10 can shield the pressure sensor 9 to prevent oil from adhering to the pressure sensor 9;

[0024] A pressure sensor 3 is fixedly connected to the bottom left side of the pressure relief pipe 1. The detection end of the pressure sensor 3 extends into the pressure relief pipe 1 and is located below the mounting seat 4. The pressure sensor 3 detects the pressure inside the oil production pipe 100 through the pressure relief pipe 1. A PLC controller 13 is fixedly connected to the left side of the pressure relief pipe 1. The PLC controller 13 is electrically connected to the pressure sensor 3, the electric telescopic rod 12, the pressure sensor 9, the oil drain solenoid valve 2 and the air drain solenoid valve 15. The PLC controller 13 receives the pressure value of the pressure sensor 3 to control the electric telescopic rod 12, the oil drain solenoid valve 2 and the air drain solenoid valve 15, and the PLC controller 13 receives the pressure value of the pressure sensor 9 to control the electric telescopic rod 12. The above control principles are basic programming settings of CNC well known to those skilled in the art. The control method can be achieved by CNC programmers editing the corresponding control numerical program, which is a conventional means or common knowledge and will not be described in detail here. A battery 14 is fixedly connected to the top inner wall of the installation box 11, and the battery 14 is electrically connected to the electric telescopic rod 12 and the PLC controller 13. The battery 14 supplies power to the electric telescopic rod 12 and the PLC controller 13; the utility model is set up through a series of structures to release the blockage of the tapered hole 5 by electric drive when the internal pressure of the oil production pipe 100 is relatively high, and perform an automatic pressure relief operation. Compared with the elastic tightening and direct squeezing of oil and gas in the prior art, the pressure relief stability can be effectively improved, and the situation where the internal pressure of the oil production pipe 100 does not reach the pressure relief requirement and the pressure relief is automatically avoided can be effectively avoided, without affecting the normal oil production operation.

[0025] Working principle: When in use, the air pressure value for opening the electric telescopic rod 12, the oil drain solenoid valve 2 and the air drain solenoid valve 15 is set in advance through the PLC controller 13, and the pressure value for closing the electric telescopic rod 12 and the air pressure value for closing the oil drain solenoid valve 2 and the air drain solenoid valve 15 are set at the same time. During normal oil production, the air pressure sensor 3 detects the air pressure inside the oil production pipe 100 through the pressure relief pipe 1, and transmits the detected pressure value to the PLC controller 13. When it is detected that the air pressure value reaches the preset value, the PLC controller 13 controls the electric telescopic rod 12 to open in the forward direction, and controls the oil drain solenoid valve 2 and the air drain solenoid valve 15 to open. When the electric telescopic rod 12 is opened in the forward direction, its output shaft drives the moving rod 8 to move upward, and the moving rod 8 drives the vertical rod 7 to move upward through the pressure sensor 9, and the vertical rod 7 drives the conical block 6 upward from the cone The conical block 6 is moved out of the conical hole 5 to release the blockage of the conical hole 5. At this time, the oil and gas inside the oil production pipe 100 move upward under pressure, and the oil is discharged through the conical hole 5 and the oil drain solenoid valve 2 in turn, and the gas moves upward under buoyancy and passes through the filter 17 and the activated carbon filter 18 in turn and is discharged to the outside through the gas drain solenoid valve 15, thereby achieving the purpose of effective pressure relief. At the same time, the filter 17 and the activated carbon filter 18 filter and adsorb impurities and harmful substances in the gas to reduce the pollution of the gas discharge to the environment. When the air pressure inside the oil production pipe 100 is high, the conical block 6 is electrically driven to move upward to release the blockage of the conical hole 5 for pressure relief. Compared with the elastic tightening and direct squeezing of oil and gas in the prior art, the pressure relief stability can be effectively improved, and the situation where the internal pressure of the oil production pipe 100 does not meet the pressure relief requirement and the pressure is automatically relieved can be effectively avoided, without affecting the normal oil production operation.

[0026] As the pressure is released, the pressure inside the oil production pipe 100 gradually decreases. When it is detected that the pressure is lower than the preset value, the PLC controller 13 controls the oil drain solenoid valve 2 and the air drain solenoid valve 15 to close, so that the oil and gas stop being discharged. At the same time, the PLC controller 13 controls the electric telescopic rod 12 to start in the reverse direction. Similarly, the movement process of the electric telescopic rod 12 is opposite to the forward start, so that the moving rod 8 drives the conical block 6 to move downward into the conical hole 5 through the pressure sensor 9 and the vertical rod 7 in turn. The conical block 6 blocks the conical hole 5. When it reaches the required position, it is restricted and cannot move further. At this time, the pressure sensor 9 that continues to move squeezes the vertical rod 7. The pressure sensor 9 detects the squeezing force and transmits the detected pressure value to the PLC controller 13. When the pressure value reaches the preset value, the PLC controller 13 controls the electric telescopic rod 12 to close. By detecting the squeezing force and controlling the closing of the electric telescopic rod 12, stable pressure control and sealing of the tapered hole 5 can be achieved, the sealing stability can be improved, and the situation where the internal pressure of the oil production pipe 100 does not meet the pressure relief requirement and automatically relieves the pressure can be further avoided.

[0027] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure relief device for an oil well, comprising a pressure relief pipe (1) connected and fixed to the top of an oil production pipe (100), wherein an oil outlet pipe (101) is connected and fixed to the left side of the oil production pipe (100), characterized in that: The top of the pressure relief pipe (1) is provided with a blocking structure, the right side of the pressure relief pipe (1) is connected to and fixed with an oil leakage solenoid valve (2), the top of the pressure relief pipe (1) is connected to and fixed with an air leakage solenoid valve (15), the bottom end of the air leakage solenoid valve (15) is bonded and fixed with a filtering mechanism, a mounting seat (4) is provided in a fixed sleeve in the pressure relief pipe (1), a conical hole (5) is provided on the top of the mounting seat (4), a pressure control blocking mechanism is provided in a movable sleeve in the conical hole (5), the pressure control blocking mechanism is slidably installed with the right inner wall of the pressure relief pipe (1), a mounting box (11) with an opening on the left side is embedded and fixed on the left side of the pressure relief pipe (1), and the mounting box (11) is provided with an opening on the left side. An electric telescopic rod (12) is fixedly connected to the inner wall of the top of the mounting box (11); the top end of the output shaft of the electric telescopic rod (12) is fixedly connected to the pressure control and blocking mechanism; an air pressure sensor (3) is fixedly connected to the bottom left of the pressure relief pipe (1); a detection end of the air pressure sensor (3) extends into the pressure relief pipe (1) and is located below the mounting seat (4); a PLC controller (13) is fixedly connected to the left side of the pressure relief pipe (1); the PLC controller (13) is electrically connected to the air pressure sensor (3), the electric telescopic rod (12), the pressure control and blocking mechanism, the oil drain solenoid valve (2) and the air drain solenoid valve (15).

2. The oil well pressure relief device according to claim 1, characterized in that: The filtering mechanism comprises an activated carbon filter (18) bonded and fixed to the bottom end of the deflation solenoid valve (15), a filter (17) bonded and fixed to the bottom of the activated carbon filter (18), an exhaust hole (16) is opened on the top inner wall of the pressure relief pipe (1), and the activated carbon filter (18) and the filter (17) are both located in the exhaust hole (16).

3. The oil well pressure relief device according to claim 1, characterized in that: The pressure control and blocking mechanism comprises a conical blocking block (6) movably sleeved in the conical hole (5), the top of the conical blocking block (6) is fixedly connected to a vertical rod (7), a moving rod (8) is slidably mounted on the right inner wall of the pressure relief pipe (1), the left bottom of the moving rod (8) is fixedly connected to the top of the output shaft of the electric telescopic rod (12), a pressure sensor (9) is embedded and fixed at the bottom of the moving rod (8), the bottom of the pressure sensor (9) is a detection end and is fixedly connected to the top of the vertical rod (7), an elastic protective cover (10) is provided on the outer adhesive sleeve of the vertical rod (7), the top of the elastic protective cover (10) is adhesively fixed to the bottom of the moving rod (8), and the pressure sensor (9) is electrically connected to a PLC controller (13).

4. The oil well pressure relief device according to claim 3, characterized in that: A T-shaped slide rail is fixedly connected to the right inner wall of the pressure relief pipe (1), and a T-shaped slide groove with openings at the top and bottom is provided at the right end of the moving rod (8), and the T-shaped slide rail is slidably connected to the T-shaped slide groove.

5. The oil well pressure relief device according to claim 2, characterized in that: The fixed sleeve on the deflation solenoid valve (15) is provided with a mounting ring, the top of the pressure relief pipe (1) is provided with four threaded grooves, the threaded sleeves in the threaded grooves are provided with T-shaped fixing bolts, the threaded sleeve of the mounting ring is provided on the four T-shaped fixing bolts, the outer bottom of the deflation solenoid valve (15) is bonded and covered with a sealing rubber sleeve, the outer side of the sealing rubber sleeve is in close contact with the inner wall of the exhaust hole (16), the bottom of the deflation solenoid valve (15) is bonded and fixed with a male Velcro, the top of the activated carbon filter (18) is bonded and fixed with a female Velcro, and the male Velcro and the female Velcro are bonded to each other.

6. The oil well pressure relief device according to claim 3, characterized in that: A movable hole is provided on the inner wall of the top of the installation box (11), a sealing ring is fixedly sleeved in the movable hole, and the inner wall of the sealing ring is in movable contact with the outer side of the extended end of the electric telescopic rod (12).

7. The oil well pressure relief device according to claim 1, characterized in that: A battery (14) is fixedly connected to the top inner wall of the installation box (11), and the battery (14) is electrically connected to the electric telescopic rod (12) and the PLC controller (13).

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