A detonator resistance detection device

Abstract

This utility model relates to the field of resistance testing, specifically disclosing a detonator resistance detection device, including a positive power supply terminal, a negative power supply terminal, a detonator, a power supply module, a communication module, a processor, a voltage detection module, a detonator drive module, a constant current source module, and a detection drive module. The positive power supply terminal is connected to one end of the power supply module, the communication module, the voltage detection module, and the detonator. The power supply module is connected to the communication module. The processor is connected to the communication module, the negative power supply terminal, the detection drive module, the detonator drive module, and the voltage detection module. The constant current source module is connected to the other end of the detonator drive module, the voltage detection module, the detonator, and the detection drive module. The detection drive module is connected to the negative power supply terminal and the detonator drive module. This utility model solves the problem that existing selector switches lack detonator resistance detection functionality and cannot determine the status of downhole detonators.

Description

Technical Field

[0001] This utility model relates to the field of resistance testing, and specifically discloses a detonator resistance testing device. Background Technology

[0002] In the oil and gas well exploitation process, the detonator, as a key safety component of the selective firing switch, directly affects wellhead safety and extraction efficiency. The resistance value of the detonator is one of its core parameters, requiring monitoring during use to ensure the proper functioning of both the selective firing switch and the detonator. However, existing selective firing switches lack detonator resistance detection capabilities and cannot determine the status of the downhole detonator. Utility Model Content

[0003] The purpose of this invention is to provide a detonator resistance detection device to solve the problem that existing selector switches lack detonator resistance detection function and cannot determine the status of downhole detonators.

[0004] The specific solution of this utility model is as follows:

[0005] A detonator resistance detection device includes a positive power supply terminal, a negative power supply terminal, a detonator, a power supply module, a communication module, a processor, a voltage detection module, a detonator drive module, a constant current source module, and a detection drive module. The positive power supply terminal is connected to one end of the power supply module, the communication module, the voltage detection module, and the detonator. The power supply module is connected to the communication module. The processor is connected to the communication module, the negative power supply terminal, the detection drive module, the detonator drive module, and the voltage detection module. The constant current source module is connected to the other end of the detonator drive module, the voltage detection module, the detonator, and the detection drive module. The detection drive module is connected to the negative power supply terminal and the detonator drive module.

[0006] In some embodiments, the voltage detection module includes a first voltage detection unit and a second voltage detection unit. The first voltage detection unit is connected to the positive terminal of the power supply, the communication module, the power supply module, one end of the detonator, and the processor, respectively. The second voltage detection unit is connected to the other end of the detonator, the constant current source module, the detonator drive module, and the processor, respectively.

[0007] In some embodiments, the first voltage detection unit includes resistors R1, R2, and R3, and capacitor C1. One end of resistor R1 is connected to one end of the detonator, the positive terminal of the power supply, the communication module, and the power supply module, respectively. The other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to the AD1 terminal of the processor, one end of resistor R3, and one end of capacitor C1, respectively. The other end of resistor R3 and the other end of capacitor C1 are both connected to the negative terminal of the power supply.

[0008] In some embodiments, the second voltage detection unit includes resistors R4, R5, and R6, and capacitor C2. One end of resistor R4 is connected to the other end of the detonator, the constant current source module, and the detonator drive module, respectively. The other end of resistor R4 is connected to one end of resistor R5. The other end of resistor R5 is connected to one end of resistor R6, one end of capacitor C2, and the AD2 terminal of the processor, respectively. The other ends of resistor R6 and capacitor C2 are both connected to the negative terminal of the power supply.

[0009] In some embodiments, the constant current source module includes resistor R7, resistor R8 and a first MOSFET. One end of resistor R7 is connected to the other end of the detonator, one end of resistor R4 and the detonator driving module, the other end of resistor R7 is connected to the source of the first MOSFET, one end of resistor R8 is connected to the drain of the first MOSFET, and the other end of resistor R8 is connected to the gate of the first MOSFET and the detection driving module.

[0010] In some embodiments, the detection driving module includes a resistor R9 and a second MOSFET. The source of the second MOSFET is connected to the other end of the resistor R8 and the gate of the first MOSFET, respectively. The drain of the second MOSFET is connected to the negative power supply terminal and the detonator driving module, respectively. The gate of the second MOSFET is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to the G3 terminal of the processor.

[0011] In some embodiments, the processor is a PIC12F1612 processor.

[0012] In some embodiments, the communication module is a DTP-S09D communication module.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] 1. This utility model achieves rapid and accurate detection of the detonator resistance value of the selective firing switch through a processor, voltage detection module, constant current source module and detection drive module. The status of the downhole detonator can be directly judged by the detonator resistance value, which improves working efficiency and safety. Moreover, the structure is simple and suitable for the field environment of oil and gas wells. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a detonator resistance detection device according to an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the detonator, voltage detection module, constant current source module, and detection drive module in the embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the processor in an embodiment of the present invention.

[0018] Reference numerals: 1-Detonator, 2-Power supply module, 3-Communication module, 4-Processor, 5-Voltage detection module, 6-Detonator driver module, 7-Constant current source module, 8-Detection driver module, 9-First MOSFET, 10-Second MOSFET. Detailed Implementation

[0019] The specific implementation method is described below with reference to the accompanying drawings.

[0020] A detonator resistance detection device, such as Figure 1 As shown, the system includes a positive power supply terminal, a negative power supply terminal, a detonator 1, a power supply module 2, a communication module 3, a processor 4, a voltage detection module 5, a detonator driver module 6, a constant current source module 7, and a detection driver module 8. The positive power supply terminal is connected to one end of the power supply module 2, the communication module 3, the voltage detection module 5, and the detonator. The power supply module 2 is connected to the communication module 3. The processor 4 is connected to the communication module 3, the negative power supply terminal, the detection driver module 8, the detonator driver module 6, and the voltage detection module 5. The constant current source module 7 is connected to the other end of the detonator driver module 6, the voltage detection module 5, the detonator, and the detection driver module 8. The detection driver module 8 is connected to the negative power supply terminal and the detonator driver module 6.

[0021] Among them, one end of the detonator is the U1 end, and the other end is the U2 end. Detonator 1 is a high-resistance detonator. The constant current source module 7 is used to provide a constant current to detonator 1. The voltage detection module 5 is used to detect the voltage across the two ends of the detonator. The power supply module 2 is used to provide working power to each component in the detonator resistance detection device. The processor 4 is used to calculate the resistance value of the detonator based on the measured voltage between the U1 and U2 ends of the detonator and the current of the detonator, and transmit the resistance value of the detonator to the host computer of the ground system through the communication module 3. The communication module 3 is used to receive and upload data information. The detection drive module 8 is used to control the on / off of the detection current of the detonator. The detonator drive module 6 is used to control the on / off of the power supply to the detonator, thereby controlling the detonation of detonator 1.

[0022] In some embodiments, such as Figure 2 and Figure 3 As shown, the voltage detection module 5 includes a first voltage detection unit and a second voltage detection unit. The first voltage detection unit is connected to the positive terminal of the power supply, the communication module 3, the power supply module 2, one end of the detonator and the processor 4, respectively. The second voltage detection unit is connected to the other end of the detonator, the constant current source module 7, the detonator drive module 6 and the processor 4, respectively.

[0023] In some embodiments, the first voltage detection unit includes resistors R1, R2, and R3, and capacitor C1. One end of resistor R1 is connected to one end of the detonator, the positive terminal of the power supply, the communication module 3, and the power supply module 2, respectively. The other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to the AD1 terminal of the processor, one end of resistor R3, and one end of capacitor C1, respectively. The other end of resistor R3 and the other end of capacitor C1 are both connected to the negative terminal of the power supply.

[0024] In some embodiments, the second voltage detection unit includes resistors R4, R5, and R6, and capacitor C2. One end of resistor R4 is connected to the other end of the detonator, the constant current source module 7, and the detonator drive module 6, respectively. The other end of resistor R4 is connected to one end of resistor R5. The other end of resistor R5 is connected to one end of resistor R6, one end of capacitor C2, and the AD2 terminal of the processor, respectively. The other ends of resistor R6 and capacitor C2 are both connected to the negative terminal of the power supply.

[0025] Among them, resistors R1, R2, R3, R4, R5 and R6 are used for voltage division, and capacitors C1 and C2 are used for filtering.

[0026] In some embodiments, the constant current source module 7 includes a resistor R7, a resistor R8, and a first MOSFET 9. One end of the resistor R7 is connected to the other end of the detonator, one end of the resistor R4, and the detonator driving module 6, respectively. The other end of the resistor R7 is connected to the source of the first MOSFET. One end of the resistor R8 is connected to the drain of the first MOSFET, and the other end of the resistor R8 is connected to the gate of the first MOSFET and the detection driving module 8, respectively.

[0027] Among them, the first MOSFET 9 is a depletion-type MOSFET, resistor R7 is used to limit the current and reduce the power consumption of the first MOSFET, and resistor R8 is used to adjust the current of the constant current source module.

[0028] In some embodiments, the detection driving module 8 includes a resistor R9 and a second MOSFET 10. The source of the second MOSFET is connected to the other end of the resistor R8 and the gate of the first MOSFET, respectively. The drain of the second MOSFET is connected to the negative terminal of the power supply and the detonator driving module 6, respectively. The gate of the second MOSFET is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to the G3 terminal of the processor.

[0029] Among them, the second MOSFET 10 is an enhancement-mode MOSFET.

[0030] In some embodiments, processor 4 is a PIC12F1612 processor.

[0031] In some embodiments, communication module 3 is a DTP-S09D communication module.

[0032] The processor 4, voltage detection module 5, constant current source module 7, and detection drive module 8 enable rapid and accurate detection of the detonator resistance value of the selector switch. The detonator resistance value can be used to directly determine the status of the downhole detonator, improving work efficiency and safety. The structure is simple and suitable for the field environment of oil and gas wells.

[0033] Working process of detonator resistance testing device:

[0034] After the constant current source module 7 outputs a high voltage to the G3 terminal of the processor, the detection drive module 8 turns on and starts working to provide a constant current to the detonator 1. The voltage detection module 5 detects the voltage across the detonator and transmits the measured voltage to the processor 4. The processor 4 calculates the resistance value of the detonator based on the measured voltage and current across the detonator and transmits the resistance value to the host computer of the ground system through the communication module 3. After the detection is completed, the detection drive module 8 is turned off. The operator judges whether the resistance value displayed on the host computer is within the preset range. The preset range is generally 46 ohms to 66 ohms. If the judgment result is yes, it means that the detonator is in normal working condition and the current detonator continues to be used. If the judgment result is no, it means that the detonator is abnormal and is not in normal working condition, and the current detonator needs to be replaced.

[0035] This utility model is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A detonator resistance detection device, characterized in that: It includes a positive power supply terminal, a negative power supply terminal, a detonator, a power supply module, a communication module, a processor, a voltage detection module, a detonator driver module, a constant current source module, and a detection driver module. The positive power supply terminal is connected to one end of the power supply module, the communication module, the voltage detection module, and the detonator. The power supply module is connected to the communication module. The processor is connected to the communication module, the negative power supply terminal, the detection driver module, the detonator driver module, and the voltage detection module. The constant current source module is connected to the other end of the detonator driver module, the voltage detection module, the detonator, and the detection driver module. The detection driver module is connected to the negative power supply terminal and the detonator driver module.

2. The detonator resistance detection device according to claim 1, characterized in that: The voltage detection module includes a first voltage detection unit and a second voltage detection unit. The first voltage detection unit is connected to the positive terminal of the power supply, the communication module, the power supply module, one end of the detonator, and the processor, respectively. The second voltage detection unit is connected to the other end of the detonator, the constant current source module, the detonator drive module, and the processor, respectively.

3. The detonator resistance detection device according to claim 2, characterized in that: The first voltage detection unit includes resistors R1, R2, and R3, and capacitor C1. One end of resistor R1 is connected to one end of the detonator, the positive terminal of the power supply, the communication module, and the power supply module, respectively. The other end of resistor R1 is connected to one end of resistor R2. The other end of resistor R2 is connected to the AD1 terminal of the processor, one end of resistor R3, and one end of capacitor C1, respectively. The other ends of resistor R3 and capacitor C1 are both connected to the negative terminal of the power supply.

4. The detonator resistance detection device according to claim 2, characterized in that: The second voltage detection unit includes resistors R4, R5, and R6, and capacitor C2. One end of resistor R4 is connected to the other end of the detonator, the constant current source module, and the detonator drive module. The other end of resistor R4 is connected to one end of resistor R5. The other end of resistor R5 is connected to one end of resistor R6, one end of capacitor C2, and the AD2 terminal of the processor. The other ends of resistor R6 and capacitor C2 are both connected to the negative terminal of the power supply.

5. The detonator resistance detection device according to claim 4, characterized in that: The constant current source module includes resistors R7 and R8 and a first MOSFET. One end of resistor R7 is connected to the other end of the detonator, one end of resistor R4 and the detonator driving module, and the other end of resistor R7 is connected to the source of the first MOSFET. One end of resistor R8 is connected to the drain of the first MOSFET, and the other end of resistor R8 is connected to the gate of the first MOSFET and the detection driving module.

6. The detonator resistance detection device according to claim 5, characterized in that: The detection drive module includes a resistor R9 and a second MOS transistor. The source of the second MOS transistor is connected to the other end of the resistor R8 and the gate of the first MOS transistor, respectively. The drain of the second MOS transistor is connected to the negative terminal of the power supply and the detonator drive module, respectively. The gate of the second MOS transistor is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to the G3 terminal of the processor.

7. The detonator resistance detection device according to claim 1, characterized in that: The processor is a PIC12F1612 processor.

8. The detonator resistance detection device according to claim 2, characterized in that: The communication module is a DTP-S09D communication module.

Images