Electronic delay explosion propagation circuit with safety detection function for oil and gas well

Abstract

The invention is applicable to the field of oil and gas well construction, and provides an oil and gas well electronic delay explosion propagation circuit with a safety detection function, which comprises a battery, a pressure conduction switch, a microprocessor, a safety detection circuit and an output control circuit, the input end of the output control circuit is connected with the pressure conduction switch, and the output end of the output control circuit is connected with the electric detonator; the microprocessor is electrically connected with the pressure conduction switch, the safety detection circuit and the output control circuit respectively; the safety detection circuit is electrically connected with the microprocessor, and the safety detection circuit comprises a connector used for switching working modes and a detection switch circuit used for indicating a circuit state; and the output control circuit comprises a power supply circuit for supplying power to the microprocessor, a switching circuit controlled by the microprocessor and an energy storage circuit for providing energy for detonation. According to the invention, the operation safety risk can be effectively reduced, and the circuit has the advantages of stability, heat resistance, high delay precision, convenience in transportation and assembly, improvement of construction efficiency, safety, reliability and the like.

Description

Technical Field

[0001] This invention relates to the field of oil and gas well construction, specifically to an electronic time-delay explosion transmission circuit for oil and gas wells with safety detection function. Background Technology

[0002] In oil and gas well perforation operations, to distinguish between the perforation signal and the wake blast signal, and to address safety issues during multi-stage detonation, a time-delay detonation device is typically used in the perforation string. Compared to traditional pyrotechnic time-delay devices, electronic time-delay detonation devices offer advantages such as high delay accuracy, lower cost, and fewer pyrotechnic components required.

[0003] However, as an electronic product, the electronic time-delay device contains precision electronic components. After long-term storage or long-distance transportation, the performance status of these components may become uncertain. Directly using a device with an unknown state in downhole operations poses a risk of detonation failure or accidental detonation, resulting in serious safety hazards.

[0004] Therefore, in view of the above situation, there is an urgent need to provide an electronic time-delay explosion transmission circuit for oil and gas wells with safety detection function to overcome the shortcomings in current practical applications. Summary of the Invention

[0005] The purpose of this invention is to provide an electronic time-delay explosion transmission circuit for oil and gas wells with safety detection function, in order to solve the problems mentioned in the background art.

[0006] The present invention is implemented as follows: an electronic time-delay explosion transmission circuit for oil and gas wells with safety detection function, comprising a battery, a pressure conduction switch, a microprocessor, a safety detection circuit and an output control circuit; The input terminal of the output control circuit is connected to the pressure switch, and the output terminal of the output control circuit is connected to the electric detonator. The microprocessor is electrically connected to the pressure switch, the safety detection circuit, and the output control circuit, respectively. The security detection circuit is electrically connected to the microprocessor, and the security detection circuit includes a connector for switching operating modes and a detection switch circuit for indicating the circuit status. The output control circuit includes a power supply circuit for powering the microprocessor, a switching circuit controlled by the microprocessor, and an energy storage circuit for providing energy for detonation.

[0007] As a further aspect of the present invention: the connector includes a signal input terminal and a ground terminal; The signal input terminal is electrically connected to a functional pin of the microprocessor, and the grounding terminal is electrically connected to common ground. The detection switch circuit includes a status indicator light and a second N-channel MOSFET. The gate of the second N-channel MOSFET is electrically connected to another functional pin of the microprocessor through a 23rd resistor. Its source is grounded and its drain is connected to the negative terminal of the status indicator light. The positive terminal of the status indicator light is connected to the battery or test power supply via the twenty-first resistor.

[0008] As a further aspect of the present invention: the signal input terminal of the connector is electrically connected to the seventh pin of the microprocessor through the twenty-fourth resistor, and the other end of the twenty-fourth resistor is electrically connected to the output terminal of the power supply circuit.

[0009] As a further aspect of the present invention, the detection switch circuit further includes a second twelfth resistor connected between the gate and source of the second N-channel MOS transistor.

[0010] As a further aspect of the present invention: the power supply circuit includes a voltage regulator chip of model MIC29150-5.0 and peripheral circuits, wherein the peripheral circuits are used to convert the battery voltage into a stable operating voltage to provide to the microprocessor; The peripheral circuit of the power supply circuit includes an eighth resistor, a ninth resistor, a first transistor, a second transistor, a first Zener diode, a first capacitor, a second capacitor, a third capacitor, a first chip, a fifth capacitor, a third transistor, a first adjustable resistor, a first thermistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a fourteenth resistor. One end of the eighth resistor and one end of the ninth resistor are connected in parallel to the battery. The other end of the eighth resistor is connected to the collector of the first transistor and the collector of the second transistor. The emitter of the first transistor is connected to the base of the second transistor. The other end of the ninth resistor and the base of the first transistor are both connected to the negative terminal of the first Zener diode. The positive terminal of the first Zener diode is connected to the common ground. The emitter of the second transistor is connected to one end of the first capacitor, the positive terminal of the second capacitor, and the input terminal of the first chip. The other end of the first capacitor, the negative terminal of the second capacitor, and the ground terminal of the first chip are all connected to the common ground. The output terminal of the first chip is connected to the positive terminal of the third capacitor and the power supply terminal of the microprocessor. The negative terminal of the third capacitor is connected to the common ground. One end of the fifth capacitor is electrically connected to the battery. The other end of the fifth capacitor is electrically connected to one end of the first adjustable resistor, one end of the tenth resistor, and one end of the twelfth resistor. The other end of the tenth resistor is electrically connected to the other end of the twelfth resistor, the base of the third transistor, and one end of the first thermistor. The other end of the first adjustable resistor is connected to the microprocessor power supply terminal and one end of the eleventh resistor. The other end of the eleventh resistor is electrically connected to one end of the sixth capacitor and the collector of the third transistor. The other end of the sixth capacitor is electrically connected to one end of the fourteenth resistor. The other ends of the twelfth resistor, the first thermistor, the thirteenth resistor, and the fourteenth resistor are all electrically connected to a common ground.

[0011] As a further aspect of the present invention, the switching circuit includes a boost chip of model FP6296.

[0012] As a further aspect of the present invention: the peripheral circuit of the switching circuit includes an eighth capacitor, a ninth capacitor, a first inductor, a first diode, a third chip, a tenth capacitor, a second resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a first N-channel MOSFET, and a P-channel MOSFET. One end of the eighth capacitor and one end of the ninth capacitor are connected in parallel to the second pin of the microprocessor. The other ends of the eighth and ninth capacitors are connected in parallel to a common ground. One end of the first inductor is connected to the second pin of the microprocessor. The other end of the first inductor is connected to the positive terminal of the first diode, the first pin of the third chip, the second pin of the third chip, and one end of the fifteenth resistor. The negative terminal of the first diode is connected to one end of the twentieth resistor. The other end of the fifteenth resistor is connected to one end of the tenth capacitor. The other end of the tenth capacitor and one end of the seventh capacitor are connected to a common ground. The other end of the seventh capacitor is connected to the third pin of the third chip. The fourth pin of the third chip is connected to the second pin of the microprocessor and one end of the second resistor. The fifth pin of the third chip is connected to a common ground. The other end of the twentieth resistor is connected to the eighth pin of the third chip, one end of the eighteenth resistor, one end of the eleventh capacitor, one end of the fourteenth capacitor, one end of the fifteenth capacitor, one end of the sixteenth capacitor, one end of the seventh resistor, and the P-channel MO. The source of the S-channel MOSFET is connected to one end of the sixteenth resistor via the seventh pin of the third chip. The sixth pin of the third chip is connected to one end of the seventeenth resistor and one end of the thirteenth capacitor. The other end of the seventeenth resistor is connected to one end of the twelfth capacitor. The other ends of the eleventh capacitor, the sixteenth resistor, the twelfth capacitor, and the thirteenth capacitor are all connected to a common ground. The other end of the eighteenth resistor is connected to the fifth pin of the third chip and one end of the nineteenth resistor. The other ends of the fourteenth capacitor, the fifteenth capacitor, the sixteenth capacitor, and the nineteenth resistor are all connected to a common ground. The other end of the seventh resistor is connected to the gate of the P-channel MOSFET and one end of the sixth resistor. The other end of the sixth resistor is connected to the drain of the first N-channel MOSFET. The gate of the first N-channel MOSFET is connected to the other end of the second resistor and one end of the third resistor. The other end of the third resistor and the source of the first N-channel MOSFET are connected to a common ground. The drain of the P-channel MOSFET is connected to a detonator.

[0013] As a further aspect of the present invention: the microprocessor adopts a single-chip microcomputer with the model number PIC12F615.

[0014] As a further aspect of the present invention: the electric detonator is a bridge wire type electric detonator.

[0015] As a further aspect of the present invention: the connector is controlled to be switched on or off by a jumper cap; When the jumper cap is inserted, the circuit enters the operating mode, triggered by the pressure-activated switch; When the jumper cap is removed and an external test power supply is connected to the detection switch circuit, the circuit enters the safety detection mode.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention employs a microprocessor to control the delay time, resulting in high delay accuracy and flexible delay duration settings. Its overall structure is simple, easy to assemble, and requires fewer pyrotechnic components, effectively improving operational efficiency. A targeted safety detection circuit is also included to address the need for circuit testing during the initial assembly phase of the device. This invention significantly improves perforation technology, reduces operational safety risks, and enhances construction efficiency and reliability. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a circuit block diagram of the present invention.

[0019] Figure 2 This is a connection circuit diagram for the present invention.

[0020] In the attached diagram: 1-Battery, 2-Pressure conduction switch, 3-Output control circuit, 4-Power supply circuit, 5-Switch circuit, 6-Energy storage circuit, 7-Microprocessor, 8-Safety detection circuit, 9-Detection switch circuit, 10-Connector, 11-Electric detonator. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] The present invention will be further explained below with reference to specific embodiments.

[0025] Please see Figure 1 and Figure 2 This invention provides an electronic time-delay detonation circuit for oil and gas wells with safety detection function, comprising a battery 1, a pressure conduction switch 2, an output control circuit 3, a microprocessor 7, and a safety detection circuit 8. The output control circuit 3 includes a power supply circuit 4, a switching circuit 5, and an energy storage circuit 6. The safety detection circuit 8 comprises a detection switch circuit 9 and a connector 10. The output terminal of the output control circuit 3 is connected to an electric detonator 11. The energy storage circuit 6 is electrically connected to the switching circuit 5.

[0026] In this embodiment, the activation of the safety detection circuit 8 is controlled by the connector 10 and the microprocessor 7. Specifically, the detection switch circuit 9 is located between the signal output pin of the microprocessor 7 and the test power supply, with a series LED serving as a status indicator to indicate the working status of the microprocessor 7 and related circuits. The connector 10 is controlled by a jumper cap and includes a signal input terminal and a ground terminal. The signal input terminal is set as a function pin of the microprocessor 7, and the ground terminal is set as a common ground. When a field testing device is required, the jumper cap is removed, and an external test power supply is connected. After internal judgment, the microprocessor 7 starts the safety detection program and illuminates the status indicator to indicate that the current circuit status is good. The signal input terminal is electrically connected to one end of the twenty-fourth resistor R24 ​​and pin 7 of the microprocessor 7. The other end of the twenty-fourth resistor R24 ​​is electrically connected to pin 3 of the MIC29150-5.0 U2. The ground terminal is electrically connected to the common ground GND.

[0027] The detection switch circuit includes a status indicator D2, a 23rd resistor R23, a 22nd resistor R22, a 21st resistor R21, and a second N-channel MOSFET Q5; One end of the 23rd resistor R23 is electrically connected to pin 6 of the microprocessor 7. The other end of the 23rd resistor R23 is electrically connected to one end of the 22nd resistor R22 and the gate of the second N-channel MOSFET Q5. The other end of the 22nd resistor R22, the source of the second N-channel MOSFET Q5, and the common ground GND are electrically connected. The drain of the second N-channel MOSFET Q5 is electrically connected to the negative terminal of the status indicator D1. The positive terminal of the status indicator D2 is electrically connected to one end of the 21st resistor R21. The other end of the 21st resistor R21 is electrically connected to the battery 1.

[0028] In a more specific example, refer to Figure 1 and Figure 2 The output control circuit 3 is electrically connected to the pressure on / off switch 2.

[0029] In this embodiment, the opening of the output control circuit 3 is controlled by the pressure conduction switch 2, the connector 10, and the microprocessor 7. Specifically, during the construction and assembly of the device, a jumper cap is inserted. The operation of the output control circuit 3 is controlled by the detonation wave transmitted by the upper gun string. When the detonation wave energy reaches the opening condition of the pressure conduction switch 2, the pressure conduction switch 2 opens. The microprocessor 7 detects the level signal at the connector 10. When it meets the delay program start setting, the delay is started. After the delay ends, the electric detonator 11 is detonated. The microprocessor 7 uses a single-chip microcomputer of model PIC12F615, and the electric detonator 11 is a bridge wire electric detonator.

[0030] In a more specific example, refer to Figure 1 and Figure 2 The power supply circuit 4 unit uses a voltage regulator chip of model MIC29150-5.0. The peripheral circuit of the power supply circuit 4 includes an eighth resistor R8, a ninth resistor R9, a first transistor Q3, a second transistor Q4, a first Zener diode VDZ, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first chip U1, a fifth capacitor C5, a third transistor BG, a first adjustable resistor Rw, a first thermistor Rt, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, and a fourteenth resistor R14. One end of the eighth resistor R8 and one end of the ninth resistor R9 are connected in parallel to the battery 1. The other end of the eighth resistor R8 is connected to the collector of the first transistor Q3 and the collector of the second transistor Q4. The emitter of the first transistor Q3 is connected to the base of the second transistor Q4. The other end of the ninth resistor R9 and the base of the first transistor Q3 are both connected to the negative terminal of the first Zener diode VDZ. The positive terminal of the first Zener diode VDZ is connected to the common ground. The emitter of the second transistor Q4 is connected to one end of the first capacitor C1, the positive terminal of the second capacitor C2, and the input terminal Vin of the first chip U1. The other end of the first capacitor C1, the negative terminal of the second capacitor C2, and the ground terminal GND of the first chip U1 are all connected to the common ground. The output terminal Vout of the first chip U1 is connected to the positive terminal of the third capacitor C3 and the power supply terminal VCC of the microprocessor 6. The negative terminal of the third capacitor C3 is connected to the common ground. One end of the fifth capacitor C5 is electrically connected to the battery 1. The other end of the fifth capacitor C5 is electrically connected to one end of the first adjustable resistor Rw, one end of the tenth resistor R10, and one end of the twelfth resistor R12. The other end of the tenth resistor R10 is electrically connected to the other end of the twelfth resistor R12, the base of the third transistor BG, and one end of the first thermistor Rt. The other end of the first adjustable resistor Rw is electrically connected to the power supply terminal VCC of the microprocessor 6 and one end of the eleventh resistor R11. The other end of the eleventh resistor R11 is electrically connected to one end of the sixth capacitor C6 and the collector of the third transistor BG. The other end of the sixth capacitor C6 is electrically connected to one end of the fourteenth resistor R14. The other ends of the twelfth resistor R12, the first thermistor Rt, the thirteenth resistor R13, and the fourteenth resistor R14 are all electrically connected to the common ground.

[0031] In a more specific example, refer to Figure 1 and Figure 2 The switching circuit 7 is controlled by the microprocessor 6. The microprocessor 6 performs logical calculations on external signals and controls the switching circuit 7 to turn on, thereby ensuring the accurate selection of delay conditions. The switching circuit 7 uses a boost chip of model FP6296. The peripheral circuit of the switching circuit 7 includes an eighth capacitor C8, a ninth capacitor C9, a first inductor L1, a first diode D1, a third chip U3, a tenth capacitor C10, a second resistor R2, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a first N-channel MOSFET Q2, and a P-channel MOSFET Q1. One end of the eighth capacitor C8 and one end of the ninth capacitor C9 are connected in parallel to the second pin GP5 of the microprocessor 6. The other end of the eighth capacitor C8 and the other end of the ninth capacitor C9 are connected in parallel to a common ground. One end of the first inductor L1 is connected to the second pin GP5 of the microprocessor 6. The other end of the first inductor L1 is connected to the positive terminal of the first diode D1, the first pin LX of the third chip U3, the second pin LX of the third chip U3, and one end of the fifteenth resistor R15. The negative terminal of the first diode D1 is connected to one end of the twentieth resistor R20. The other end of the fifteenth resistor R15 is connected to one end of the tenth capacitor C10. The other end of capacitor C10 and one end of the seventh capacitor C7 are electrically connected to a common ground. The other end of the seventh capacitor C7 is electrically connected to the third pin VCC of the third chip U3. The fourth pin EN of the third chip U3 is electrically connected to the second pin GP5 of the microprocessor 6 and one end of the second resistor R2. The fifth pin GND of the third chip U3 is electrically connected to a common ground. The other end of the twentieth resistor R20 is electrically connected to the eighth pin HVDD of the third chip U3, one end of the eighteenth resistor R18, one end of the eleventh capacitor C11, one end of the fourteenth capacitor C14, one end of the fifteenth capacitor C15, one end of the sixteenth capacitor C16, and one end of the seventh resistor R7. The third chip U3 connects to the source of the P-channel MOSFET Q1. Pin 7 (OC) of the third chip U3 is electrically connected to one end of resistor R16. Pin 6 (COMP) of the third chip U3 is electrically connected to one end of resistor R17 and one end of capacitor C13. The other end of resistor R17 is electrically connected to one end of capacitor C12. The other ends of capacitors C11, C11, C16, C12, and C13 are all electrically connected to a common ground. The other end of resistor R18 is electrically connected to pin 5 (FB) of the third chip U3 and one end of resistor R19. The other ends of the fourteenth capacitor C14, the fifteenth capacitor C15, the sixteenth capacitor C16, and the nineteenth resistor R19 are all electrically connected to a common ground. The other end of the seventh resistor R7 is electrically connected to the gate of the P-channel MOSFET Q1 and one end of the sixth resistor R6. The other end of the sixth resistor R6 is electrically connected to the drain of the first N-channel MOSFET Q2. The gate of the first N-channel MOSFET Q2 is connected to the other end of the second resistor R2 and one end of the third resistor R3. The other end of the third resistor R3 and the source of the first N-channel MOSFET Q2 are electrically connected to a common ground. The drain of the P-channel MOSFET Q1 is electrically connected to a detonator.

[0032] In an embodiment of the present invention, before the device is operated, the safety detection circuit 8 can be used to detect whether the current electronic delay explosion transmission circuit for oil and gas wells is in good working order, which can effectively reduce the safety risks of operation. The circuit has the advantages of being stable and heat-resistant, having high delay accuracy, being easy to transport and assemble, improving construction efficiency, and being safe and reliable.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic delay blasting circuit with safety detection function for oil and gas well, comprising a battery, characterized in that it further comprises a pressure switch, a microprocessor, a safety detection circuit and an output control circuit. The input end of the output control circuit is connected with the pressure switch, and the output end of the output control circuit is connected with an electric detonator. The microprocessor is electrically connected with the pressure switch, the safety detection circuit and the output control circuit respectively. The safety detection circuit is electrically connected with the microprocessor, and the safety detection circuit comprises a connector for switching working mode and a detection switch circuit for indicating circuit state. The output control circuit comprises a power supply circuit for supplying power to the microprocessor, a switch circuit controlled by the microprocessor and an energy storage circuit for providing energy for detonation.

2. The electronic delay detonating circuit with safety detection function for oil and gas well according to claim 1, characterized in that, The connector comprises a signal input terminal and a ground terminal. The signal input terminal is electrically connected with one functional pin of the microprocessor, and the ground terminal is electrically connected with a common ground. The detection switch circuit comprises a state indicating lamp and a second N-channel MOS tube, the gate of the second N-channel MOS tube is electrically connected with another functional pin of the microprocessor through a twenty-third resistor, the source of the second N-channel MOS tube is grounded, and the drain of the second N-channel MOS tube is connected with the negative electrode of the state indicating lamp. The positive electrode of the state indicating lamp is connected with the battery or a test power supply through a twenty-first resistor.

3. The electronic delay detonating circuit with safety detection function for oil and gas well according to claim 2, characterized in that, The signal input terminal of the connector is electrically connected with the seventh pin of the microprocessor through a twenty-fourth resistor, and the other end of the twenty-fourth resistor is electrically connected with the output end of the power supply circuit.

4. The electronic delay detonator circuit with safety detection function for oil and gas well according to claim 2, characterized in that, The detection switch circuit further comprises a twenty-second resistor connected between the gate and the source of the second N-channel MOS tube.

5. The electronic delay detonator circuit with safety detection function for oil and gas wells according to claim 1, characterized in that, The power supply circuit comprises a voltage stabilizing chip of MIC29150-5.0 type and a peripheral circuit for converting the battery voltage into a stable working voltage to supply to the microprocessor. The peripheral circuit of the power supply circuit comprises an eighth resistor, a ninth resistor, a first triode, a second triode, a first voltage stabilizing tube, a first capacitor, a second capacitor, a third capacitor, a first chip, a fifth capacitor, a third triode, a first adjustable resistor, a first thermistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor and a fourteenth resistor. One end of the eighth resistor and one end of the ninth resistor are electrically connected with the battery in parallel, the other end of the eighth resistor is electrically connected with the collector of the first triode and the collector of the second triode, the emitter of the first triode is electrically connected with the base of the second triode, the other end of the ninth resistor and the base of the first triode are both electrically connected with the negative electrode of the first voltage stabilizing tube, the positive electrode of the first voltage stabilizing tube is electrically connected with a common ground, the emitter of the second triode is respectively electrically connected with one end of the first capacitor, the positive electrode of the second capacitor and the input end of the first chip, the other end of the first capacitor, the negative electrode of the second capacitor and the ground end of the first chip are all electrically connected with the common ground, the output end of the first chip is respectively electrically connected with the positive electrode of the third capacitor and the power supply end of the microprocessor, and the negative electrode of the third capacitor is electrically connected with the common ground. One end of the fifth capacitor is electrically connected with the battery, the other end of the fifth capacitor is electrically connected with one end of the first adjustable resistor, one end of the tenth resistor and one end of the twelfth resistor respectively, the other end of the tenth resistor is electrically connected with the other end of the twelfth resistor, the base of the third triode and one end of the first thermistor, the other end of the first adjustable resistor is electrically connected with the power supply end of the microprocessor and one end of the eleventh resistor respectively, the other end of the eleventh resistor is electrically connected with one end of the sixth capacitor and the collector of the third triode respectively, the other end of the sixth capacitor is electrically connected with one end of the fourteenth resistor, the other end of the twelfth resistor, the other end of the first thermistor, the other end of the thirteenth resistor and the other end of the fourteenth resistor are all electrically connected with the common ground.

6. The electronic delay detonator circuit with safety detection function for oil and gas well according to claim 1, characterized in that, The switch circuit comprises a boost chip with a model number of FP6296.

7. The electronic delay detonator circuit with safety detection function for oil and gas well according to claim 6, characterized in that, The peripheral circuit of the switch circuit comprises an eighth capacitor, a ninth capacitor, a first inductor, a first diode, a third chip, a tenth capacitor, a second resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a first N-channel MOS tube and a P-channel MOS tube. One end of the eighth capacitor and one end of the ninth capacitor are connected in parallel to the second pin of the microprocessor, the other end of the eighth capacitor and the other end of the ninth capacitor are connected in parallel to the common ground, one end of the first inductor is connected to the second pin of the microprocessor, the other end of the first inductor is connected to the anode of the first diode, the first pin of the third chip, the second pin of the third chip and one end of the fifteenth resistor respectively, the cathode of the first diode is connected to one end of the twentieth resistor, the other end of the fifteenth resistor is connected to one end of the tenth capacitor, the other end of the tenth capacitor and one end of the seventh capacitor are connected to the common ground respectively, the other end of the seventh capacitor is connected to the third pin of the third chip, the fourth pin of the third chip is connected to the second pin of the microprocessor and one end of the second resistor respectively, the fifth pin of the third chip is connected to the common ground, the other end of the twentieth resistor is connected to the eighth pin of the third chip, one end of the eighteenth resistor, one end of the eleventh capacitor, one end of the fourteenth capacitor, one end of the fifteenth capacitor, one end of the sixteenth capacitor, one end of the seventh resistor and the source of the P-channel MOS transistor respectively, the seventh pin of the third chip is connected to one end of the sixteenth resistor, the sixth pin of the third chip is connected to one end of the seventeenth resistor and one end of the thirteenth capacitor respectively, the other end of the seventeenth resistor is connected to one end of the twelfth capacitor, the other end of the eleventh capacitor, the other end of the sixteenth resistor, the other end of the twelfth capacitor and the other end of the thirteenth capacitor are connected to the common ground respectively, the other end of the eighteenth resistor is connected to the fifth pin of the third chip and one end of the nineteenth resistor respectively, the other end of the fourteenth capacitor, the other end of the fifteenth capacitor, the other end of the sixteenth capacitor and the other end of the nineteenth resistor are connected to the common ground respectively, the other end of the seventh resistor is connected to the gate of the P-channel MOS transistor and one end of the sixth resistor respectively, the other end of the sixth resistor is connected to the drain of the first N-channel MOS transistor, the gate of the first N-channel MOS transistor is connected to the other end of the second resistor and one end of the third resistor, the other end of the third resistor and the source of the first N-channel MOS transistor are connected to the common ground respectively, and the drain of the P-channel MOS transistor is connected to the electric detonator.

8. The electronic delay detonator circuit with safety detection function for oil and gas well according to claim 1, characterized in that, The microprocessor adopts a single-chip microcomputer chip with a model of PIC12F615.

9. The electronic delay detonator circuit with safety test function for oil and gas wells according to claim 1, characterized in that, The electric detonator is a bridge wire type electric detonator.

10. The electronic delay detonating circuit with safety test function for oil and gas well according to any one of claims 1 to 9, characterized in that, The connector controls its on-off by a jumper cap. When the jumper cap is inserted, the circuit enters the working mode triggered by the pressure on-off switch. When the jumper cap is pulled out and an external test power is connected to the detection switch circuit, the circuit enters the safety detection mode.

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