Self-detection pulse type gas blowout ignition device

Abstract

A self-detection pulse type gas blowout ignition device comprises a blowout pipe and an ignition section connected to the tail end of the blowout pipe, an ignition gun is arranged in the ignition section, the self-detection pulse type gas blowout ignition device further comprises a water flow detection section connected to the blowout pipe in series, and a first three-way valve and a third three-way valve are connected to a pipeline, between the water flow detection section and the ignition section, of the blowout pipe in series. The third end of the first three-way valve is connected with a second three-way valve, the other two ends of the second three-way valve are connected with the water storage tank and an inlet of the gas-water separation device respectively, the third end of the third three-way valve is connected with a gas outlet of the gas-water separation device, and a liquid outlet of the gas-water separation device is connected with the water storage tank; the ignition device further comprises a control circuit, and the control circuit is in control connection with the three-way valves, the ignition gun and the gas-water separation device. According to the gas-water separation device, gas-water separation is carried out on water flow in detection gas flow, so that moisture of the gas flow reaching the igniter is removed, and it is guaranteed that an ignition electrode normally works in a dry environment.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploitation, in particular to a self-detecting pulse type gas ejection ignition device. Background Art

[0002] Blowout is the process of manually opening the wellhead during oil and gas exploration and development for oil and gas testing, allowing the oil and gas in the well to be controlled and released out of the well. The gas ejected from the well after the blowout is ignited and burned for harmless disposal. However, during oil drilling and well repair, blowouts or test blowouts can release large amounts of flammable and toxic gases such as methane and hydrogen sulfide. If not ignited in time, these gases can cause explosions or environmental pollution. Traditional ignition methods use manual torches or electronic igniters at the wellhead. Ignition is carried out using high-voltage discharge from electrodes. When airflow is detected at the wellhead, the ignition circuit activates, generating high voltage at the electrodes, which breaks through the air to produce sparks. These sparks then ignite when they encounter high concentrations of flammable gas. In recent years, pulsed igniters have been increasingly used, using the pulse principle to generate continuous, instantaneous sparks, thereby igniting the flame.

[0003] However, in actual operation, due to water accumulation in the well or pipeline at the beginning of the blowdown, the initial airflow may contain a small amount of water flow. However, the airflow has also been generated at this time, causing the ignition circuit to trigger ignition after detecting the airflow. In the presence of water flow, it is easy to cause a short circuit between the discharge electrodes, starting the protection circuit to shut down, and subsequent ignition cannot be achieved. At the same time, the ignition of electrodes that are stained with water or work in humid airflow is prone to irregular arcing, affecting the ignition effect and reducing the service life of the electrode. Summary of the Invention

[0004] In order to overcome the defects of the prior art, the present invention discloses a self-detecting pulse gas discharge ignition device.

[0005] The gas ignition device for oilfield development of the present invention comprises a discharge nozzle and an ignition section connected to the end of the discharge nozzle, wherein an ignition gun is provided in the ignition section, and further comprises a water flow detection section connected in series to the discharge nozzle. A first three-way valve and a third three-way valve are connected in series on the discharge nozzle pipeline between the water flow detection section and the ignition section. The third end of the first three-way valve is connected to the second three-way valve, and the other two ends of the second three-way valve are respectively connected to a water reservoir and an inlet of a gas-water separation device. The third end of the third three-way valve is connected to the gas outlet of the gas-water separation device, and the liquid outlet of the gas-water separation device is connected to the water reservoir. The ignition device also includes a control circuit, which controls the connection of each three-way valve, ignition gun and gas-water separation device, and controls the working status of the three-way valve, ignition gun and gas-water separation device according to the water volume detection result of the water flow detection section to prevent water from directly entering the ignition section.

[0006] Preferably, the top of the water reservoir and the inlet of the gas-water separation device are connected via a pipeline, and a pressure relief valve is connected to the pipeline.

[0007] Preferably, the gas-water separation device is a cyclone separator.

[0008] Preferably, a one-way valve is installed on the spray pipe between the first three-way valve and the third three-way valve.

[0009] Preferably, the control mode of the control circuit is: If the water flow detection section detects that the current water volume is greater than the set first water volume threshold, a drainage operation is performed; if the water flow detection section detects that the current water volume is greater than the set second water volume threshold but not greater than the first water volume threshold, a gas-water separation operation is performed; if the water flow detection section detects that the current water volume is not greater than the set second water volume threshold, a straight-through operation is performed; The drainage operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the water reservoir, and the gas-water separation device and the ignition gun do not work; the gas-water separation operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the inlet of the gas-water separation device, and the ignition section is only connected to the gas outlet of the gas-water separation device, and the gas-water separation device and the ignition gun work normally; the straight-through operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the ignition section, the gas-water separation device does not work, and the ignition gun works normally.

[0010] Preferably, the water flow detection section includes a tubular body, a plurality of conductive coils continuously arranged within the tubular body, the outer sides of each conductive coil being fixedly connected to the inner wall of the tubular body via support columns, resistors connected between adjacent conductive coils, the resistors being connected in series and forming a resistor network with a current-limiting resistor, the resistor network being connected between a power supply terminal and ground, and the resistor network being further connected to a detection terminal. The control circuit further includes an analog-to-digital converter connected to the detection terminal.

[0011] Preferably, the support column is hollow, and a conductive wire is buried inside the support column to be electrically connected to the conductive coil and passes through the outside of the tubular body to be connected to an external resistor.

[0012] Preferably, a circuit compartment is provided outside the tubular body.

[0013] Preferably, the control circuit includes a main single-chip microcomputer, an airflow sensor, a combustion detection sensor, an ignition control circuit and a gas-water separation control circuit connected to the main single-chip microcomputer, wherein the ignition control circuit is connected to the ignition electrode of the ignition gun, the gas-water separation control circuit is connected to each three-way valve and the gas-water separation device, and the main single-chip microcomputer is also connected to the signal output end connection board of the water flow detection section.

[0014] Preferably, the combustion detection sensor is an infrared sensor.

[0015] Preferably, a light emitting diode is connected between the output end of the voltage amplifier stage and the ground.

[0016] The present invention has the following beneficial effects: 1. By detecting the water flow in the air flow and performing gas-water separation, the air flow reaching the igniter is dehydrated, ensuring that the ignition electrode works normally in a relatively dry environment. The normal air flow without water is controlled through pipelines and valves, and the air flow can be discharged directly from the wellhead without passing through the gas-water separation device, ensuring that the air flow in the blowdown process flows normally through the blowdown pipeline without being affected by the gas-water separation device.

[0017] 2. The entire ignition device can be installed by adding additional pipelines to the existing blowdown pipeline, without the need to redesign and construct the blowdown pipeline, thus expanding the application scenarios of technology upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a specific embodiment of the gas ignition device for oil field development according to the present invention; Figure 2 for Figure 1 A schematic cross-sectional view of some components of the embodiment shown; Figure 3 This is a schematic diagram of a specific implementation of the water flow detection section of the present invention; Figure 4 A schematic diagram of a specific embodiment of the control circuit of the gas ignition device for oil field development according to the present invention; Figure 5 A schematic diagram of a specific embodiment of the control method of the gas ignition device for oil field development according to the present invention; The names of the reference numerals in the figure are: VT-detection end, VIN-power supply end, R0-current limiting resistor, R1-first resistor, R2-second resistor, R3-third resistor, R4-fourth resistor, R5-fifth resistor, 1-first three-way valve, 2-second three-way valve, 3-third three-way valve, 4-nozzle, 5-ignition section, 51-ignition gun, 6-water flow detection section, 7-cyclone separator, 8-water reservoir, 9-delay section, 10-pressure relief valve, 11-check valve, 60-tubular body, 61-conductor coil, 62-support column, 63-circuit compartment, 71-gas-water separation device inlet, 72-gas outlet, 73-liquid outlet. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the embodiments, but the present invention is not limited to the following embodiments: The oil field exploitation of the present invention adopts gas ignition device, such as Figure 1 and Figure 2As shown, it includes a discharge nozzle and an ignition section 5 connected to the end of the discharge nozzle, an ignition gun 51 is provided in the ignition section 5, and a water flow detection section 6 connected in series to the discharge nozzle. A first three-way valve 1 and a third three-way valve 3 are connected in series on the discharge nozzle pipeline between the water flow detection section 6 and the ignition section 5. The third end of the first three-way valve is connected to the second three-way valve 2, and the other two ends of the second three-way valve are respectively connected to the water reservoir 8 and the inlet 71 of the gas-water separation device. The third end of the third three-way valve is connected to the gas outlet of the gas-water separation device, and the liquid outlet 73 of the gas-water separation device is connected to the water reservoir 8. The ignition device also includes a control circuit, which controls the connection of each three-way valve, ignition gun and gas-water separation device, and controls the working status of the three-way valve, ignition gun and gas-water separation device according to the water volume detection result of the water flow detection section to prevent water from directly entering the ignition section.

[0020] A specific control method is as follows: if the water flow detection section detects that the current water volume is greater than the set first water volume threshold, a drainage operation is performed; if the water flow detection section detects that the current water volume is greater than the set second water volume threshold but not greater than the first water volume threshold, an air-water separation operation is performed; if the water flow detection section detects that the current water volume is not greater than the set second water volume threshold, a straight-through operation is performed.

[0021] The drainage operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the water reservoir, and the gas-water separation device and the ignition gun do not work; the gas-water separation operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the inlet of the gas-water separation device, and the ignition section is only connected to the gas outlet of the gas-water separation device, and the gas-water separation device and the ignition gun work normally; the straight-through operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the ignition section, the gas-water separation device does not work, and the ignition gun works normally. A specific working state diagram is shown in FIG. Figure 5 shown.

[0022] Through the above arrangement, when the water content in the blowdown gas is too high or is basically entirely water, the drainage operation is directly performed without ignition, so as to avoid the ignition gun being impacted by the water flow; when the blowdown gas contains a small amount of water, the water is drained through the gas-water separation device, and the drained gas is sent to the ignition section for ignition. At this time, the gas-water separation device and the ignition gun are working normally, and the decision on whether to ignite is made while draining; when there is no water in the blowdown gas, the conventional blowdown operation is directly performed, the ignition gun works normally, and the gas-water separation device does not work.

[0023] Figure 1 and Figure 2In the specific embodiment shown, the top of the water reservoir 8 and the inlet 71 of the gas-water separation device are connected by a pipeline, and a pressure relief valve 10 is connected to the pipeline. When excessive gas mixed into the water reservoir 8 during the gas-water separation operation and the drainage operation causes the liquid surface pressure to rise, it can be discharged into the gas-water separation device through the pressure relief valve. After the gas-water separation operation is performed in the gas-water separation device, it enters the ignition section for combustion, thereby avoiding the emission of toxic and combustible gases to the outside.

[0024] The gas-water separation device 7 can be a cyclone separator, which is suitable for gas-liquid separation of the gas-water mixture produced by downhole blowdown, which usually contains a small amount of sand and gravel. Solids can also fall from the bottom liquid outlet.

[0025] To prevent fluid backflow, a one-way valve 11 can be installed on the blowdown pipe between the first three-way valve 1 and the third three-way valve 3 so that the fluid can only flow from the first three-way valve 1 to the third three-way valve 3 .

[0026] In the present invention, the water flow detection section 6 is a section of a pipe-type device connected in series on the blowout pipe, which can detect the water volume of the blowout pipe. Since the water content in the blowout pipe is unstable, the typical state is that it contains a small amount of underground water in the early stage. After the underground water is discharged, it is all gas. During the blowout operation, it is impossible to control whether the small amount of water is discharged in a concentrated manner or randomly mixed with the blowout gas and discharged. It is usually easy to form scattered intermittent water flows in the blowout pipe. Traditional flow meters are suitable for stable and continuous water flow detection. In the present invention, the detection effect is unstable; and the gas-water separation device of the present invention can only separate the gas-water mixture containing a certain proportion of water when the gas-water separation processing speed is limited. It is necessary to detect the water volume in the intermittent water state to avoid the gas-water mixture containing too much water entering the gas-water separation device and making it difficult to completely separate the water flow, causing the water flow to enter the ignition section. It is necessary to be able to perform more accurate water volume detection on the gas-water mixture in the intermittent water state.

[0027] like Figure 3 The figure shows a specific embodiment of the water flow detection section of the present invention, comprising a tubular body 60, a plurality of conductive coils 61 arranged continuously within the tubular body, the outer sides of each conductive coil being fixedly connected to the inner wall of the tubular body via support columns 62, resistors connected between adjacent conductive coils, each resistor connected in series and forming a resistor network with a current-limiting resistor, the resistor network being connected between a power supply terminal and ground, and further connected to a detection terminal. The control circuit also includes an analog-to-digital converter connected to the detection terminal.

[0028] The resistance between adjacent wire coils can be formed by filling insulating material between adjacent wire coils, or by connecting an external resistor through a wire. A preferred embodiment is that the support column 62 is set to be hollow, and a wire is buried inside the support column to connect to the wire coil and pass through the outside of the tubular body to connect to the external resistor. Figure 3In the illustrated embodiment, a circuit compartment 63 is located outside the tubular body, housing components such as resistors, an analog-to-digital converter, and a battery for powering the power supply. This compartment can be connected to the three-way valves and the ignition gun via external signal cables. To facilitate connection to the nozzle pipe, a connecting flange can be fixedly attached to each side of the water flow detection section.

[0029] The following uses the water flow detection section with five coils S1 to S5 as an example to illustrate the detection principle of the water flow detection section. Figure 4 The figure shows a specific embodiment of the control circuit of the gas ignition device for oil field development according to the present invention, including a main single-chip microcomputer, an airflow sensor connected to the main single-chip microcomputer, an infrared sensor serving as a combustion detection sensor, an ignition control circuit, and a gas-water separation control circuit. The ignition control circuit is connected to the ignition electrode, and the gas-water separation control circuit is connected to each three-way valve and a cyclone separator serving as the gas-water separation device. The main single-chip microcomputer is also connected to the digital signal output terminal of an analog-to-digital converter, the voltage input terminal of the analog-to-digital converter is connected to the detection terminal, and the detection terminal is connected to a resistor network. The resistor network includes multiple resistors connected in series between a power supply terminal and ground, wherein R0 is a current-limiting resistor, and the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 respectively represent the equivalent resistance between the conductive coils S1 and S2, S2 and S3, S3 and S4, and S4 and S5 when no water flows through the water flow detection section. The magnitude of the equivalent resistance can be determined by the insulation layer provided between adjacent conductive coils, or can be set by pre-embedded wires connected to external resistors through hollow conductive coil supports outside the conductive coils.

[0030] For ease of explanation, assume that the resistance values ​​of the five resistors R0 to R1 are exactly the same, the spacing between the conductor coils is also equal, and the voltage input from the power supply terminal VIN is 5V. When there is no water flow, it is easy to calculate that the voltage detected by the detection terminal VT is 4V.

[0031] When there is water flow, assuming that the water flow completely conducts the conductive coils S1 and S2, causing the equivalent resistance R1 between the conductive coils S1 and S2 to be completely short-circuited, it can be calculated that the voltage obtained at the detection end at this time is 5*3 / 4=3.75V. Assuming that the length of the water flow is only greater than L and less than 2L, where L represents the length between two adjacent conductive coils, as the position of the water flow in the water flow detection section changes, only one of the four resistors R1 to R4 can be short-circuited at any time, and the voltage at the detection end will not change with the change of the water flow position.

[0032] Similarly, assuming the length of the water flow is greater than 2L but less than 3L, as the position of the water flow changes, only two of the four resistors R1 to R4 can be short-circuited at any time. At this time, the voltage obtained at the detection end is 5*2 / 4=2.5V. Similarly, the voltage at the detection end does not change with the change of the water flow position.

[0033] As the length of the water flow increases, more and more resistors are short-circuited, and the voltage at the detection end VT continues to decrease. When all are short-circuited, it drops to zero. The function of the current-limiting resistor R0 is to limit the current between the power supply end and the ground when all the conductor coils are short-circuited by the water flow.

[0034] The voltage at the detection terminal VT is detected by an analog-to-digital converter, and a higher first switching threshold VT1 and a lower second switching threshold VT2 are pre-set. When the voltage at the detection terminal VT is lower than the second switching threshold, it indicates that the water flow is long enough to short-circuit multiple resistors. At this point, the gas-water separation control circuit performs a drainage operation, discharging the gas-water mixture, which is mostly water, directly into the reservoir through the drainage branch. When the voltage at the detection terminal VT is higher than the second switching threshold but lower than the first switching threshold, it indicates that the gas-water mixture contains relatively little water and can only short-circuit a small number of resistors. At this point, the gas-water separation control circuit performs a gas-water separation operation, passing the gas-water mixture, which is a small amount of water, through the gas-water separation device for separation. The gas flow is then discharged to the ignition port, and the ignition operation is performed. When the voltage at the detection terminal VT is higher than the first switching threshold, it indicates that the gas-water mixture is essentially free of water and cannot short-circuit resistors. At this point, the gas-water separation control circuit performs a through-flow operation, discharging the water-free gas flow directly to the ignition port, and the ignition operation is performed.

[0035] The above-mentioned first switching threshold VT1 as a voltage value and a lower second switching threshold VT2 correspond to the aforementioned second water volume threshold and first water volume threshold respectively. When the voltage of the detection terminal VT is lower than the second switching threshold, it means that the current water volume is greater than the set first water volume threshold. When the voltage of the detection terminal VT is higher than the second switching threshold but lower than the first switching threshold, the current water volume is greater than the set second water volume threshold but not greater than the first water volume threshold. When the voltage of the detection terminal VT is higher than the first switching threshold, the current water volume is not greater than the set second water volume threshold.

[0036] Figure 3 In the specific implementation shown, a typical setting method is to set the first switching threshold to 3.75V, that is, the voltage value when one resistor is short-circuited, and set the second switching threshold to 2.5V, that is, the voltage value when two resistors are short-circuited.

[0037] Figure 3 The specific implementation shown only provides a specific implementation of five conductor coils. In order to avoid the situation where the water flow is slow and the water flow is greater than L but less than 2L, but there is a long time for the water flow to short-circuit two adjacent conductor coils, resulting in a long detection hysteresis, the value of L can be reduced so that the conductor coils are densely arranged, thereby shortening the misjudgment time period.

[0038] The main single-chip microcomputer detects the digital signal output by the analog-to-digital converter and controls the gas-water separation control circuit to switch the pipeline valves. When the voltage at the detection terminal is lower than the first switching threshold, the gas-water mixture is primarily water, and the ignition control circuit is usually controlled to be inoperative, that is, the ignition gun in the ignition stage does not perform electrode discharge operation. If the voltage at the detection terminal is higher than the first switching threshold, electrode discharge operation can be performed. The typical operating mode at this time is: the airflow sensor detects the presence of airflow, and the infrared sensor detects whether the ignition port temperature has reached the preset combustion threshold. If it has reached the threshold, it indicates that ignition has occurred, and electrode discharge is not initiated. If the combustion threshold has not been reached and airflow is present, electrode discharge is initiated.

[0039] In a preferred embodiment, the control circuit can be powered by a solar cell, and the stored electrical energy is stored in a lithium battery to provide power for the circuit part. The specific implementation method of the ignition control circuit to start the electrode discharge of the ignition gun is the existing technology in the field, for example, a pulsed ignition circuit controlled by a clock signal can be used, which will not be repeated here.

[0040] The usual implementation method of the gas-water separation control circuit is to use single-chip microcomputer programming. The signal output by the main single-chip microcomputer is used to determine whether to perform drainage operation, gas-water separation operation or straight-through operation, and control each valve and gas-water separator to enter the corresponding working state.

[0041] The pipeline from the water flow detection section to the three-way valve is the delay section 9. The delay section is set to allow each valve the time required to open and close the valve. The delay section 9 from the water flow detection section to the first three-way valve can be selected to a suitable length according to the usual flow rate and switching time. For example, if the valve switching time is 4 seconds and the flow rate is about 10 meters per second, the length of this section of the pipeline can be set to 30 meters to 50 meters.

[0042] In a preferred embodiment, the control circuit can be powered by solar cells. Compared with the prior art, the present invention has the following beneficial effects: 1. By detecting the water flow in the air flow and performing gas-water separation, the air flow reaching the igniter is dehydrated, ensuring that the ignition electrode works normally in a relatively dry environment. The normal air flow without water is controlled through pipelines and valves, and the air flow can be discharged directly from the wellhead without passing through the gas-water separation device, ensuring that the air flow in the blowdown process flows normally through the blowdown pipeline without being affected by the gas-water separation device.

[0043] 2. The entire ignition device can be installed by adding additional pipelines to the existing blowdown pipeline, without the need to redesign and construct the blowdown pipeline, thus expanding the application scenarios of technology upgrades.

[0044] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art to which the present invention belongs, other embodiments derived without departing from the technical solution of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-detecting pulsed gas discharge ignition device, comprising a discharge nozzle (4) and an ignition section (5) connected to the end of the discharge nozzle, wherein an ignition gun (51) is provided in the ignition section, characterized in that: It also includes a water flow detection section (6) connected in series on the discharge nozzle, a first three-way valve (1) and a third three-way valve (3) connected in series on the discharge nozzle pipeline between the water flow detection section and the ignition section, the third end of the first three-way valve (1) is connected to the second three-way valve (2), the other two ends of the second three-way valve (2) are respectively connected to the water reservoir (8) and the inlet (71) of the gas-water separation device, the third end of the third three-way valve is connected to the gas outlet (72) of the gas-water separation device, and the liquid outlet (73) of the gas-water separation device is connected to the water reservoir (8); The ignition device also includes a control circuit, which controls the connection of each three-way valve, ignition gun and gas-water separation device, and controls the working status of the three-way valve, ignition gun and gas-water separation device according to the water volume detection result of the water flow detection section to prevent water from directly entering the ignition section.

2. The gas ignition device for oil field development according to claim 1, characterized in that: The top of the water reservoir (8) and the inlet (71) of the gas-water separation device are connected via a pipeline, and a pressure relief valve (10) is connected to the pipeline.

3. The gas ignition device for oil field development according to claim 1, characterized in that: The gas-water separation device is a cyclone separator (7).

4. The gas ignition device for oil field development according to claim 1, characterized in that: A one-way valve (11) is installed on the spray pipe between the first three-way valve (1) and the third three-way valve (3).

5. The gas ignition device for oil field development according to claim 1, characterized in that: The control mode of the control circuit is: If the water flow detection section detects that the current water volume is greater than the set first water volume threshold, a drainage operation is performed; if the water flow detection section detects that the current water volume is greater than the set second water volume threshold but not greater than the first water volume threshold, a gas-water separation operation is performed; if the water flow detection section detects that the current water volume is not greater than the set second water volume threshold, a straight-through operation is performed; The drainage operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the water reservoir, and the gas-water separation device and the ignition gun do not work; the gas-water separation operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the inlet of the gas-water separation device, and the ignition section is only connected to the gas outlet of the gas-water separation device, and the gas-water separation device and the ignition gun work normally; the straight-through operation is to set the valve state of each three-way valve so that the water flow detection section is only connected to the ignition section, the gas-water separation device does not work, and the ignition gun works normally.

6. The gas ignition device for oil field development according to claim 1, characterized in that: The water flow detection section includes a tubular body (60), a plurality of conductive coils (61) continuously arranged inside the tubular body, the outer sides of each conductive coil being fixedly connected to the inner wall of the tubular body (60) via a support column (62), resistors being connected between adjacent conductive coils, each resistor being connected in series and forming a resistor network with a current-limiting resistor, the resistor network being connected between a power supply terminal and a ground, and the resistor network being further connected to a detection terminal. The control circuit also includes an analog-to-digital converter connected to the detection terminal.

7. The gas ignition device for oil field development according to claim 6, characterized in that: The support column (62) is hollow, and a conductive wire is buried inside the support column to be electrically connected to the conductive coil and passes through the outside of the tubular body to be connected to an external resistor.

8. The gas ignition device for oil field development according to claim 6, characterized in that: A circuit compartment (63) is provided outside the tubular body.

9. The gas ignition device for oil field development according to claim 1, characterized in that: The control circuit includes a main single-chip microcomputer, an airflow sensor, a combustion detection sensor, an ignition control circuit and a gas-water separation control circuit connected to the main single-chip microcomputer, wherein the ignition control circuit is connected to the ignition electrode of the ignition gun, and the gas-water separation control circuit is connected to each three-way valve and the gas-water separation device. The main single-chip microcomputer is also connected to the signal output end connection board of the water flow detection section.

10. The gas ignition device for oil field development according to claim 9, characterized in that: The combustion detection sensor is an infrared sensor.

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