A non-explosive power device for setting downhole bridge plugs in oil and gas fields

Abstract

The application provides a non-explosive power device for downhole bridge plug setting, which comprises, from top to bottom, a power transmission part, a non-explosive power source and a hydraulic cylinder. The non-explosive solid or liquid material is used as a gas source, compared with the firecracker power source, the device is not limited by the overall diameter, only needs to be lengthened in the axial direction and the amount of the gas source is increased, that is, the power output requirement can be met, and the device will not appear the fire interruption accident caused by the small diameter of the firecracker; compared with the pure electric power source, the output power of the non-explosive power device is larger, and the phenomenon of insufficient thrust will not appear.

Description

Technical Field

[0001] This invention belongs to the field of downhole engineering technology in oil and gas fields, and relates to a power source for bridge plug setting operations, specifically a non-explosive power device for downhole bridge plug setting in oil and gas fields. Background Technology

[0002] In oilfield development, especially in the production of horizontal wells, it is necessary to perform perforation and fracturing in layers and sections. When performing layered and sectioned perforation and fracturing, a bridging plug needs to be installed at the lower part of the fracturing layer to separate the perforation and fracturing location from the lower layer before perforation and fracturing operations are carried out. Afterward, the bridging plug is removed, and the above operation is repeated until all oil and gas layers have been perforated and fracturing.

[0003] There are two main existing bridge plug setting methods. The first method uses gunpowder as a power source, relying on the high-pressure gas generated by the gunpowder to drive the corresponding bridge plug tool and set the bridge plug. This method is currently the most widely used. The second method uses electro-hydraulic or pure electric power sources to drive the corresponding bridge plug tool and set the bridge plug. This method has been tested in a small number of downholes and has not yet been put into large-scale application.

[0004] The main drawbacks of the first approach are: gunpowder is an explosive material, requiring stringent storage conditions, and the purchase and registration process is complex; furthermore, small-diameter gunpowder is prone to misfires. The main drawbacks of the second approach are: when using an electric motor as a power source, the power output is limited by the motor's size, and different sized power sources need to be designed for different sizes of oil and gas wells, increasing operating costs and reducing efficiency. Additionally, because such power units use numerous electronic components, their temperature tolerance is insufficient (maximum tolerance temperature is 175℃). Under the high temperature and pressure environment of oil and gas wells, these electronic components are easily damaged, potentially causing downhole accidents. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a non-explosive power device for setting bridge plugs in oil and gas fields, which solves the technical problems of easy flameout of gunpowder power sources and insufficient output power of electric power sources in the existing technology.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A non-explosive power device for setting bridge plugs in oil and gas field wells includes an electric conduction unit, a non-explosive power source, and a hydraulic cylinder connected sequentially from top to bottom.

[0008] The power transmission unit includes an upper connector, in which a circuit chip is fixedly installed. The top of the circuit chip is connected to the bottom of a circuit base. The top of the circuit base extends beyond the top of the upper connector. The bottom of the circuit chip is connected to the top of a main cable. The bottom of the main cable extends into the top of the non-explosive power source and connects to the top of a control valve connection line. The bottom of the control valve connection line is located at the bottom of the non-explosive power source.

[0009] The non-explosive power source includes a power source housing connected to the power transmission unit, a pressure chamber detachably installed inside the power source housing, a pressure sensor installed at the top of the pressure chamber, a control valve fixedly installed at the bottom of the pressure chamber, and a first gas generation source filled inside the pressure chamber.

[0010] The circuit base is connected to the input terminal of the circuit chip, the first output terminal of the circuit chip is connected to the input terminal of the main cable, the first output terminal of the main cable is connected to the pressure sensor, the second output terminal of the main cable is connected to the input terminal of the control valve connection line, and the output terminal of the control valve connection line is connected to the control valve.

[0011] The present invention also has the following technical features:

[0012] Specifically, the first gas source is dry ice or liquid nitrogen.

[0013] Specifically, the shell of the pressure chamber is made of titanium alloy.

[0014] Specifically, the hydraulic cylinder includes a first hydraulic cylinder housing, the top of which is connected to a non-power source housing, and the bottom of which is connected to a second hydraulic cylinder housing. A first piston is disposed inside the first hydraulic cylinder housing, and the sealed space formed by the top of the first piston, the bottom of the non-explosive power source, and the first hydraulic cylinder housing is a pressure chamber. A second piston is disposed inside the top of the second hydraulic cylinder housing, and the space formed by the top of the second piston, the bottom of the first piston, the first hydraulic cylinder housing, and the second hydraulic cylinder housing is a hydraulic chamber filled with hydraulic oil. The bottom of the second piston is fixedly connected to the top of a drive rod, and the bottom of the drive rod extends out of the bottom of the second hydraulic cylinder housing and contacts the bridge plug.

[0015] Specifically, a pressure relief hole is provided on the housing of the first hydraulic cylinder.

[0016] Optionally and specifically, a second gas source may be used to replace the first gas source mentioned above.

[0017] Optionally and specifically, the power conduction section further includes a cathode wire, an anode wire, and an electrode base; the bottom of the circuit chip is connected to the top of the cathode wire and the anode wire, and the bottom of the cathode wire and the anode wire extends into the top of the non-explosive power source and is connected to the electrode base.

[0018] Optionally and specifically, the non-explosive power source further includes a second gas generation source, an ion exchange membrane, a cathode electrode, and an anode electrode; the ion exchange membrane is installed in the pressure chamber and divides the space inside the pressure chamber into a cathode chamber and an anode chamber, a cathode electrode is installed in the cathode chamber, an anode electrode is installed in the anode chamber, and the second gas generation source is filled in both the cathode chamber and the anode chamber.

[0019] Optionally and specifically, the second output terminal of the circuit chip is connected to the input terminal of the cathode wire, the output terminal of the cathode wire is connected to the input terminal of the cathode electrode through the electrode base, and the output terminal of the cathode electrode extends into the second gas source of the cathode chamber; the third output terminal of the circuit chip is connected to the input terminal of the anode wire, the output terminal of the anode wire is connected to the input terminal of the anode electrode through the electrode base, and the output terminal of the anode electrode extends into the second gas source of the anode chamber.

[0020] Optionally and specifically, the second gas source is saturated saline solution.

[0021] Optionally and specifically, the ion exchange membrane is a cation exchange membrane.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] (I) The non-explosive power device for setting bridge plugs in oil and gas fields of the present invention uses non-explosive solid or liquid substances as the gas source. Compared with gunpowder power sources, this device is not limited by the overall diameter. It only needs to be extended in the axial direction and the amount of gas source needs to be increased to meet the power output requirements. Moreover, this device will not have the problem of flameout accident caused by the small diameter of gunpowder. Compared with pure electric power sources, this non-explosive power device has a greater output power and will not have the phenomenon of insufficient thrust.

[0024] (II) The non-explosive power device for setting bridge plugs in oil and gas field wells of the present invention uses a two-stage piston cylinder in the hydraulic cylinder, which can effectively increase the final thrust of the non-explosive power device.

[0025] (III) The non-explosive power device for setting bridge plugs in oil and gas fields of the present invention can be made into a smaller diameter device to meet the needs of construction in special environments, and has better applicability compared to existing gunpowder and pure electric power sources. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the non-explosive power unit for setting bridge plugs in oil and gas fields, as described in Example 1.

[0027] Figure 2This is a schematic diagram of the overall structure of the non-explosive power unit for setting bridge plugs in oil and gas fields, as shown in Example 2.

[0028] Figure 3 This is a schematic diagram of the working state of a non-explosive power unit used for setting bridge plugs in oil and gas field wells.

[0029] The meanings of the labels in the diagram are as follows: 1-Power transmission unit, 2-Non-explosive power source, 3-Hydraulic cylinder, 4-Bridge plug, 5-Wellhead control device, 6-Cable, 7-Surface power supply, 8-Casing.

[0030] 101-Upper connector, 102-Circuit chip, 103-Circuit base, 104-Main cable, 105-Control valve connection cable, 106-Cathode wire, 107-Anode wire, 108-Electrode base.

[0031] 201-Power source housing, 202-Pressure chamber, 203-Pressure sensor, 204-Control valve, 205-First gas source, 206-Second gas source, 207-Ion exchange membrane, 208-Cathode electrode, 209-Anode electrode.

[0032] 301-First hydraulic cylinder housing, 302-Second hydraulic cylinder housing, 303-First piston, 304-Pressure chamber, 305-Second piston, 306-Hydraulic chamber, 307-Drive rod, 308-Pressure relief hole.

[0033] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, all components and materials used in this invention are those known in the art, such as:

[0035] The circuit chip 102 uses a conventional circuit chip known in the prior art.

[0036] The main cable 104 uses conventional armored cable known in the prior art.

[0037] The control valve 204 is a conventional solenoid valve known in the prior art.

[0038] The ion exchange membrane 207 uses a conventional ion exchange membrane known in the prior art.

[0039] The cathode electrode 208 and the anode electrode 209 employ conventional electrodes known in the prior art.

[0040] The hydraulic oil filling the hydraulic chamber 306 is a conventional hydraulic oil known in the prior art.

[0041] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0042] Example 1:

[0043] This embodiment provides a non-explosive power device for setting bridge plugs in oil and gas field wells, such as... Figure 1 As shown, it includes, from top to bottom, an electric conduction unit 1, a non-explosive power source 2, and a hydraulic cylinder 3.

[0044] The power transmission unit 1 includes an upper connector 101, in which a circuit chip 102 is fixedly installed. The top of the circuit chip 102 is connected to the bottom of a circuit base 103. The top of the circuit base 103 extends out of the top of the upper connector 101. The bottom of the circuit chip 102 is connected to the top of a main cable 104. The bottom of the main cable 104 extends into the top of the non-explosive power source 2 and is connected to the top of a control valve connection line 105. The bottom of the control valve connection line 105 is located at the bottom of the non-explosive power source 2.

[0045] The non-explosive power source 2 includes a power source housing 201 connected to the power transmission unit 1. A pressure chamber 202 is detachably installed inside the power source housing 201. A pressure sensor 203 is installed at the top of the pressure chamber 202. A control valve 204 is fixedly installed at the bottom of the pressure chamber 202. The pressure chamber 202 is filled with a first gas production source 205.

[0046] The circuit base 103 is connected to the input terminal of the circuit chip 102, the first output terminal of the circuit chip 102 is connected to the input terminal of the main cable 104, the first output terminal of the main cable 104 is connected to the pressure sensor 203, the second output terminal of the main cable 104 is connected to the input terminal of the control valve connection line 105, and the output terminal of the control valve connection line 105 is connected to the control valve 204.

[0047] In this embodiment, the upper connector 101, the power source housing 201, the first hydraulic cylinder housing 301, the second hydraulic cylinder housing 302, and the drive rod 307 are all connected by threads to ensure stability during downhole operations.

[0048] In this embodiment, as Figure 3As shown, one end of the circuit chip 102 is connected to the wellhead control device 5, and the other end is connected to the pressure sensor 203 via the main cable 104. The wellhead control device 5 can display the pressure in the pressure chamber 202. The main cable 104 is multi-core, one of which is the control valve connection line 105. The control valve connection line 105 is arranged inside the thick wall of the pressure chamber. The control valve connection line 105 is used to control the opening and closing of the solenoid valve. After the wellhead control device 5 is powered by the ground power supply 7, it can control the non-explosive power device downhole, which is convenient for operators to operate.

[0049] In this embodiment, the control valve 204 is a one-way valve, and the gas in the pressure chamber 202 is released into the pressure cavity 304 and cannot return to the pressure chamber 202.

[0050] In this embodiment, the pressure chamber 202 can be reused, and can be refilled with gas source after each use.

[0051] As a specific embodiment, the first gas source 205 is dry ice or liquid nitrogen. When the temperature exceeds the vaporization or sublimation temperature of dry ice or liquid nitrogen, the dry ice or liquid nitrogen will change from a solid or liquid state to a gaseous state, and its volume can continue to expand to 700 to 800 times its original size, which can provide sufficient power. In addition, the pressure generated by dry ice or liquid nitrogen is controllable, and the thrust of the system can be calculated based on the mass of dry ice or liquid nitrogen, which is helpful for structural design.

[0052] As a specific embodiment, the shell of the pressure chamber 202 is made of titanium alloy. Titanium alloy has excellent temperature resistance (able to withstand high temperatures of 500℃~600℃), pressure resistance (able to withstand pressure of 300MPa), and ductility, which can protect the electronic components inside the device and prevent downhole accidents.

[0053] Since dry ice or liquid or solid gas sublimates rapidly at high temperatures, as an optional solution in this embodiment, the shell of the pressure chamber 202 is composed of two shells, with a gap between them. After the space inside the two shells of the pressure chamber 202 is evacuated, it can isolate the internal and external temperatures for a certain period of time, so that the first gas source 205 inside can maintain its original state as much as possible, or only a small amount of the first gas source 205 can be converted into gas.

[0054] In addition, as another optional solution in this embodiment, the pressure chamber 202 is divided into front and rear parts. A pressure valve is set between the first-stage pressure chamber and the second-stage pressure chamber. When the first stage releases and generates a certain pressure, the pressure valve can open the cavity of the second stage. The pressure generation can be extended by releasing the pressure chambers of both stages. This setting can be used to connect multiple stages in series to achieve continuous, stable and sustained pressure output.

[0055] As a specific embodiment, the hydraulic cylinder 3 includes a first hydraulic cylinder housing 301, the top end of which is connected to the non-power source housing 201, and the bottom end of which is connected to the second hydraulic cylinder housing 302. A first piston 303 is disposed inside the first hydraulic cylinder housing 301, and the sealed space formed by the top end of the first piston 303, the bottom end of the non-explosive power source 2, and the first hydraulic cylinder housing 301 is a pressure chamber 304. A second piston 305 is disposed inside the top of the second hydraulic cylinder housing 302, and the space formed by the top end of the second piston 305, the bottom end of the first piston 303, the first hydraulic cylinder housing 301, and the second hydraulic cylinder housing 302 is a hydraulic chamber 306, which is filled with hydraulic oil. The bottom end of the second piston 305 is fixedly connected to the top end of a drive rod 307, and the bottom end of the drive rod 307 extends out of the bottom of the second hydraulic cylinder housing 302 and contacts the bridge plug 4. The cross-sectional area of ​​the second piston 305 is smaller than that of the first piston 303, ensuring that the hydraulic oil can generate sufficient driving force under the movement of the first piston 303.

[0056] As a specific embodiment, a pressure relief hole 308 is provided on the first hydraulic cylinder housing 301. The pressure relief hole 308 is used to release excess pressure and ensure that the internal pressure of the device is balanced with the external environmental pressure after the operation is completed.

[0057] In this embodiment, the assembly and working principle of the non-explosive power device are as follows:

[0058] First, before operation or before leaving the factory, fill the pressure chamber 202 with the first gas source 205, and install the pressure sensor 203 and control valve 204 at the upper and lower ends of the pressure chamber 202. Fill the hydraulic chamber 306 with hydraulic oil, and then connect the power transmission unit 1, the non-explosive power source 2 and the hydraulic cylinder 3 in sequence, and use a cable to transmit the non-explosive power device to the working position of the casing.

[0059] Second, the pressure sensor 203 is energized through the power conduction unit 1, and the pressure signal is transmitted to the circuit chip 102. At this time, the pressure chamber 202 has a certain pressure. After the pressure reaches a certain value, the circuit chip 102 sends an opening control signal to the control valve 204, and the pressure will be quickly released into the pressure chamber 304. At the same time, the temperature in the pressure chamber 304 will be quickly transferred to the pressure chamber 202 through heat conduction, so that the first gas source 205 is heated and converted into a gaseous state. The gas enters the pressure chamber 304, pushing the first piston 303 to move downward continuously, and continuously pushing the hydraulic oil in the hydraulic chamber 306 to flow downward. The hydraulic oil acts on the second piston 305 and pushes the second piston 305 to move downward. The second piston drives the drive rod 307 to move downward. After the drive rod 307 acts on the bridge plug, the bridge plug is set.

[0060] Third, after the bridge plug is set, the upper surface of the first piston 303 moves to the lower position of the pressure relief hole 308. At this time, the pressure in the hydraulic chamber 306 is released into the wellbore, maintaining balance with the wellbore pressure. Then, the tool string is pulled out of the wellhead via cable, completing the operation.

[0061] Example 2:

[0062] This embodiment provides a non-explosive power device for setting bridge plugs in oil and gas field wells, such as... Figure 2 As shown, it includes, from top to bottom, an electric conduction unit 1, a non-explosive power source 2, and a hydraulic cylinder 3.

[0063] The power conduction unit 1 includes an upper connector 101, in which a circuit chip 102 is fixedly installed. The top of the circuit chip 102 is connected to the bottom of a circuit base 103. The top of the circuit base 103 extends beyond the top of the upper connector 101. The bottom of the circuit chip 102 is connected to the top of a main cable 104. The bottom of the main cable 104 extends into the top of the non-explosive power source 2 and is connected to the top of a control valve connection line 105. The bottom of the control valve connection line 105 is located at the bottom of the non-explosive power source 2. The bottom of the circuit chip 102 is also connected to the top of a cathode wire 106 and an anode wire 107. The bottoms of the cathode wire 106 and the anode wire 107 extend into the top of the non-explosive power source 2 and are connected to an electrode base 108.

[0064] The non-explosive power source 2 includes a power source housing 201 connected to the power conduction unit 1. A pressure chamber 202 is detachably installed inside the power source housing 201. A pressure sensor 203 is installed at the top of the pressure chamber 202. A control valve 204 is fixedly installed at the bottom of the pressure chamber 202. An ion exchange membrane 207 is installed inside the pressure chamber 202. The ion exchange membrane 207 divides the space inside the pressure chamber 202 into a cathode chamber and an anode chamber. A cathode electrode 208 is installed in the cathode chamber, and an anode electrode 209 is installed in the anode chamber. A second gas production source 206 is filled in both the cathode chamber and the anode chamber.

[0065] The circuit base 103 is connected to the input terminal of the circuit chip 102. The first output terminal of the circuit chip 102 is connected to the input terminal of the main cable 104, and the first output terminal of the main cable 104 is connected to the pressure sensor 203. The second output terminal of the main cable 104 is connected to the input terminal of the control valve connection line 105, and the output terminal of the control valve connection line 105 is connected to the control valve 204. The second output terminal of the circuit chip 102 is connected to the input terminal of the cathode wire 106, and the output terminal of the cathode wire 106 is connected to the input terminal of the cathode electrode 208 through the electrode base 108. The output terminal of the cathode electrode 208 extends into the second gas source 206 of the cathode chamber. The third output terminal of the circuit chip 102 is connected to the input terminal of the anode wire 107, and the output terminal of the anode wire 107 is connected to the input terminal of the anode electrode 209 through the electrode base 108. The output terminal of the anode electrode 209 extends into the second gas source 206 of the anode chamber.

[0066] As a specific embodiment, the second gas source 206 is saturated saline solution; the ion exchange membrane 207 is a cation exchange membrane.

[0067] In this embodiment, the reaction process of the saturated saline electrolyte can be represented as: 2NaCl + 2H₂O (electrolysis) → 2NaOH + H₂↑ + Cl₂↑. At the anode, Cl₂... - The anode loses electrons and is oxidized into chlorine atoms. These chlorine atoms then combine to form chlorine molecules, releasing chlorine gas. The oxidation reaction at the anode can be represented as: 2Cl₂ - -2e - =Cl2↑; In the cathode, H + Electrons are continuously gained from the cathode and reduced to hydrogen atoms. These hydrogen atoms combine in pairs to form hydrogen molecules, releasing hydrogen gas from the cathode. The oxidation reaction at the cathode can be represented as: 2H₂O₂ → ... + +2e - =H2↑. Cation exchange membranes only allow cations such as H+. + Through, while anions such as Cl - Then it cannot pass through; the cation exchange membrane can prevent Cl from passing through. - It reacts with NaOH to ensure that the electrolysis reaction can proceed smoothly.

[0068] As a specific embodiment, a pressure chamber 202 is detachably installed inside the power source housing 201. The space inside the pressure chamber 202 is the pressure chamber 202. A pressure sensor 203 is installed at the top of the pressure chamber 202, and a control valve 204 is fixedly installed at the bottom of the pressure chamber 202.

[0069] As a specific embodiment, the shell of the pressure chamber 202 is made of titanium alloy.

[0070] As a specific embodiment, the hydraulic cylinder 3 includes a first hydraulic cylinder housing 301, the top end of which is connected to the non-power source housing 201, and the bottom end of which is connected to the second hydraulic cylinder housing 302. A first piston 303 is disposed inside the first hydraulic cylinder housing 301, and the sealed space formed by the top end of the first piston 303, the bottom end of the non-explosive power source 2, and the first hydraulic cylinder housing 301 is a pressure chamber 304. A second piston 305 is disposed inside the top of the second hydraulic cylinder housing 302, and the space formed by the top end of the second piston 305, the bottom end of the first piston 303, the first hydraulic cylinder housing 301, and the second hydraulic cylinder housing 302 is a hydraulic chamber 306, which is filled with hydraulic oil. The bottom end of the second piston 305 is fixedly connected to the top end of a drive rod 307, and the bottom end of the drive rod 307 extends out of the bottom of the second hydraulic cylinder housing 302 and contacts the bridge plug 4.

[0071] As a specific solution in this embodiment, a pressure relief hole 308 is provided on the housing 301 of the first hydraulic cylinder.

[0072] In this embodiment, as Figure 3 As shown, the assembly and working principle of the non-explosive power device are as follows:

[0073] First, before operation (or before leaving the factory), fill the pressure chamber 202 with the second gas source 206, and install the pressure sensor 203 and control valve 204 at the upper and lower ends of the pressure chamber 202. Fill the hydraulic chamber 306 with hydraulic oil, and then connect the power transmission unit 1, the non-explosive power source 2, and the hydraulic cylinder 3 in sequence. Use cable 6 to transmit the non-explosive power device to the working position of the casing 8.

[0074] Second, the pressure sensor 203 is energized through the power conduction unit 1, and the pressure signal is transmitted to the circuit chip 102. Simultaneously, the output voltages of the cathode electrode 208 and anode electrode 209 are controlled. As the second gas source 206 continuously electrolyzes, the gas production rate decreases. Therefore, the voltages of the cathode electrode 208 and anode electrode 209 need to be adjusted in real time according to the potential changes in the electrolytic cell, for example, using a PID control method, to ensure that the second gas source 206 produces sufficient gas. When the pressure in the pressure chamber 202 reaches a certain value, the circuit chip 102 sends an opening signal to the control valve 204. After the control signal is received, the pressure will be quickly released into the pressure chamber 304. At the same time, the temperature in the pressure chamber 304 will be quickly transferred to the pressure chamber 202 through heat conduction, so that the first gas source 205 is heated and converted into a gaseous state. The gas enters the pressure chamber 304, pushing the first piston 303 to move downward continuously, and continuously pushing the hydraulic oil in the hydraulic chamber 306 to flow downward. The hydraulic oil acts on the second piston 305 and pushes the second piston 305 to move downward. The second piston drives the drive rod 307 to move downward. After the drive rod 307 acts on the bridge plug, the bridge plug is set.

[0075] Third, after the bridge plug is set, the upper surface of the first piston 303 moves to the lower position of the pressure relief hole 308. At this time, the pressure in the hydraulic chamber 306 is released into the wellbore, maintaining balance with the wellbore pressure. Then, the tool string is pulled out of the wellhead via cable 6, completing the operation.

Claims

1. A non-explosive power device for setting bridge plugs in oil and gas field wells, characterized in that, It includes, from top to bottom, a power transmission unit (1), a non-explosive power source (2), and a hydraulic cylinder (3). The power transmission part (1) includes an upper connector (101), a circuit chip (102) is fixedly installed inside the upper connector (101), the top of the circuit chip (102) is connected to the bottom of the circuit base (103), the top of the circuit base (103) extends out of the top of the upper connector (101), the bottom of the circuit chip (102) is connected to the top of the main cable (104), the bottom of the main cable (104) extends into the top of the non-explosive power source (2) and is connected to the top of the control valve connection line (105), and the bottom of the control valve connection line (105) is located at the bottom of the non-explosive power source (2). The non-explosive power source (2) includes a power source housing (201) connected to the power conduction unit (1), a pressure chamber (202) is detachably installed inside the power source housing (201), a pressure sensor (203) is installed at the top of the pressure chamber (202), a control valve (204) is fixedly installed at the bottom of the pressure chamber (202), and a first gas generation source (205) is filled inside the pressure chamber (202). The circuit base (103) is connected to the input terminal of the circuit chip (102), the first output terminal of the circuit chip (102) is connected to the input terminal of the main cable (104), the first output terminal of the main cable (104) is connected to the pressure sensor (203), the second output terminal of the main cable (104) is connected to the input terminal of the control valve connection line (105), and the output terminal of the control valve connection line (105) is connected to the control valve (204). The first gas source (205) is dry ice or liquid nitrogen; The shell of the pressure chamber (202) is made of titanium alloy; The hydraulic cylinder (3) includes a first hydraulic cylinder housing (301), the top of which is connected to a non-power source housing (201), and the bottom of which is connected to a second hydraulic cylinder housing (302). A first piston (303) is provided inside the first hydraulic cylinder housing (301), and the sealed space formed by the top of the first piston (303), the bottom of the non-explosive power source (2), and the first hydraulic cylinder housing (301) is a pressure chamber (304). A second piston (305) is provided in the top of the cylinder housing (302). The space enclosed by the top of the second piston (305), the bottom of the first piston (303), the first hydraulic cylinder housing (301), and the second hydraulic cylinder housing (302) is a hydraulic chamber (306). The hydraulic chamber (306) is filled with hydraulic oil. The bottom of the second piston (305) is fixedly connected to the top of the drive rod (307). The bottom of the drive rod (307) extends out of the bottom of the second hydraulic cylinder housing (302) and contacts the bridge plug.

2. The non-explosive power device for setting bridge plugs in oil and gas field wells as described in claim 1, characterized in that, The first hydraulic cylinder housing (301) is provided with a pressure relief hole (308).

3. A non-explosive power device for setting bridge plugs in oil and gas field wells, characterized in that, It includes, from top to bottom, a power transmission unit (1), a non-explosive power source (2), and a hydraulic cylinder (3). The power conduction part (1) includes an upper connector (101), in which a circuit chip (102) is fixedly installed. The top of the circuit chip (102) is connected to the bottom of a circuit base (103). The top of the circuit base (103) extends out of the top of the upper connector (101). The bottom of the circuit chip (102) is connected to the top of a main cable (104). The bottom of the main cable (104) extends into the top of the non-explosive power source (2) and is connected to the top of a control valve connection line (105). The bottom of the control valve connection line (105) is located at the bottom of the non-explosive power source (2). The bottom of the circuit chip (102) is also connected to the top of a cathode wire (106) and an anode wire (107). The bottoms of the cathode wire (106) and the anode wire (107) extend into the top of the non-explosive power source (2) and are connected to an electrode base (108). The non-explosive power source (2) includes a power source housing (201) connected to the power conduction unit (1). A pressure chamber (202) is detachably installed inside the power source housing (201). A pressure sensor (203) is installed at the top of the pressure chamber (202). A control valve (204) is fixedly installed at the bottom of the pressure chamber (202). An ion exchange membrane (207) is installed inside the pressure chamber (202). The ion exchange membrane (207) divides the space inside the pressure chamber (202) into a cathode chamber and an anode chamber. A cathode electrode (208) is installed in the cathode chamber. An anode electrode (209) is installed in the anode chamber. A second gas generation source (206) is filled in both the cathode chamber and the anode chamber. The circuit base (103) is connected to the input terminal of the circuit chip (102), the first output terminal of the circuit chip (102) is connected to the input terminal of the main cable (104), the first output terminal of the main cable (104) is connected to the pressure sensor (203); the second output terminal of the main cable (104) is connected to the input terminal of the control valve connection line (105), the output terminal of the control valve connection line (105) is connected to the control valve (204); the second output terminal of the circuit chip (102) is connected to the input terminal of the cathode wire (106). The output end of the cathode wire (106) is connected to the input end of the cathode electrode (208) through the electrode base (108), and the output end of the cathode electrode (208) extends into the second gas source (206) of the cathode chamber; the third output end of the circuit chip (102) is connected to the input end of the anode wire (107), and the output end of the anode wire (107) is connected to the input end of the anode electrode (209) through the electrode base (108), and the output end of the anode electrode (209) extends into the second gas source (206) of the anode chamber.

4. The non-explosive power device for setting bridge plugs in oil and gas field wells as described in claim 3, characterized in that, The second gas source (206) is saturated saline solution.

5. The non-explosive power device for setting bridge plugs in oil and gas field wells as described in claim 4, characterized in that, The ion exchange membrane (207) is a cation exchange membrane.

6. The non-explosive power device for setting bridge plugs in oil and gas field wells as described in claim 5, characterized in that, The hydraulic cylinder (3) includes a first hydraulic cylinder housing (301), the top of which is connected to a non-power source housing (201), and the bottom of which is connected to a second hydraulic cylinder housing (302). A first piston (303) is provided inside the first hydraulic cylinder housing (301), and the sealed space formed by the top of the first piston (303), the bottom of the non-explosive power source (2), and the first hydraulic cylinder housing (301) is a pressure chamber (304). A second piston (305) is provided in the top of the cylinder housing (302). The space enclosed by the top of the second piston (305), the bottom of the first piston (303), the first hydraulic cylinder housing (301), and the second hydraulic cylinder housing (302) is a hydraulic chamber (306). The hydraulic chamber (306) is filled with hydraulic oil. The bottom of the second piston (305) is fixedly connected to the top of the drive rod (307). The bottom of the drive rod (307) extends out of the bottom of the second hydraulic cylinder housing (302) and contacts the bridge plug.

7. The non-explosive power device for setting bridge plugs in oil and gas field wells as described in claim 6, characterized in that, The first hydraulic cylinder housing (301) is provided with a pressure relief hole (308).

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