Control circuit of electronic detonator for oil and gas well

Abstract

The utility model relates to a control circuit of an electronic detonator for an oil and gas well. The control circuit comprises a power management module, a communication module, a singlechip U1, a programmable read-only memory, a driving module, an energy storage module and a detonation module, the power management module supplies power to all the modules, the signal receiving and transmitting end of the communication module is electrically connected with the signal receiving and transmitting end of the single-chip microcomputer U1, the serial communication end of the single-chip microcomputer U1 is electrically connected with the data transmission end of the programmable read-only memory, and the signal output end of the single-chip microcomputer U1 is electrically connected with the control end of the driving module. The output end of the driving module is electrically connected with the positive electrode of the energy storage module and the positive electrode of the detonation module. The negative electrode of the energy storage module and the negative electrode of the detonation module are grounded. According to the electronic detonator for the oil and gas well, the programmable read-only memory in which unique identity information, namely the U ID code, is pre-stored is matched with the singlechip to realize safety management of external signals, so that the safety management performance of the electronic detonator for the oil and gas well is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic detonators for oil and gas wells, in particular to a control circuit of electronic detonators for oil and gas wells. Background Art

[0002] Electronic detonators for oil and gas wells are mainly used for perforating in oil and gas wells. When perforating in oil and gas wells, wired electronic detonator control circuits are usually used for communication, which is not conducive to the laying of communication cables in oil and gas wells, which not only increases the cost of cable use, but also the control circuit structure of traditional oil and gas well electronic detonators is simple and does not have the ability to manage secure communications. Utility Model Content

[0003] In order to solve the technical problems in the prior art that the control circuit structure of electronic detonators for oil and gas wells is simple and does not have the security communication management capability, the utility model provides a control circuit for electronic detonators for oil and gas wells.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A control circuit for electronic detonators for oil and gas wells, comprising a power management module, a communication module, a single-chip microcomputer U1, a programmable read-only memory, a driving module, an energy storage module and a detonation module; the power output end of the power management module is electrically connected to the power input end of the communication module, the power input end of the single-chip microcomputer U1, the power input end of the programmable read-only memory and the power input end of the driving module respectively, the signal transceiver end of the communication module is electrically connected to the signal transceiver end of the single-chip microcomputer U1, the serial communication end of the single-chip microcomputer U1 is electrically connected to the data transmission end of the programmable read-only memory, the signal output end of the single-chip microcomputer U1 is electrically connected to the control end of the driving module, the output end of the driving module is electrically connected to the positive electrode of the energy storage module and the positive electrode of the detonation module respectively, and the negative electrode of the energy storage module and the negative electrode of the detonation module are both grounded.

[0006] The beneficial effect of the utility model is that by setting up a single-chip microcomputer and a programmable read-only memory, the programmable read-only memory with pre-stored unique identity information, namely the UID code, can be used in conjunction with the single-chip microcomputer to achieve safe management of external signals, thereby improving the safety management performance of electronic detonators for oil and gas wells.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the driving module includes a signal amplifying unit and a switching unit, the in-phase input terminal of the signal amplifying unit is electrically connected to the signal output terminal of the single-chip computer U1, the inverting input terminal of the signal amplifying unit is grounded, the output terminal of the signal amplifying unit is electrically connected to the base of the switching unit, the collector of the switching unit is respectively electrically connected to the output terminal of the power management module, the positive electrode of the energy storage module and the positive electrode of the detonation module, and the emitter of the switching unit is grounded.

[0009] Furthermore, the signal amplification unit includes a resistor R2, a resistor R3 and an operational amplifier U2; one end of the resistor R2 is electrically connected to the signal output end of the single-chip computer U1, the other end of the resistor R2 is electrically connected to the in-phase input end of the operational amplifier U2, one end of the resistor R3 is electrically connected to the in-phase input end of the operational amplifier U2, the other end of the resistor R3 is electrically connected to the output end of the operational amplifier U2, the inverting input end of the operational amplifier U2 is grounded, and the output end of the operational amplifier U2 is electrically connected to the base of the switching unit.

[0010] Further, the switch unit includes a transistor Q1, a resistor R4 and a resistor R5, the base of the transistor Q1 is electrically connected to the output end of the operational amplifier U2, one end of the resistor R4 is electrically connected to the base of the transistor Q1, the other end of the resistor R4 and the emitter of the transistor Q1 are both grounded, the collector of the transistor Q1 is electrically connected to one end of the resistor R5, and the other end of the resistor R5 is electrically connected to the output end of the power management module, the positive electrode of the energy storage module and the positive electrode of the detonation module respectively.

[0011] Furthermore, the energy storage module includes capacitors C1, C2 and C3, the positive electrodes of the capacitors C1, C2 and C3 are all electrically connected to the other end of the resistor R5 and the positive electrode of the detonation module, and the negative electrodes of the capacitors C1, C2 and C3 are all grounded.

[0012] Furthermore, the driving module also includes an indicator light unit, which includes a resistor R1 and a light-emitting diode D2, one end of the resistor R1 is electrically connected to the output end of the power management module, the other end of the resistor R1 is electrically connected to the positive electrode of the light-emitting diode D1, and the negative electrode of the light-emitting diode D1 is electrically connected to the other end of the resistor R5.

[0013] Furthermore, the communication module includes a wireless communication module and a wired communication module, and the signal transceiver end of the single chip microcomputer U1 is electrically connected to the signal transceiver end of the wireless communication module and the signal transceiver end of the wired communication module respectively.

[0014] Furthermore, the wireless communication module is an ESP8266 wireless WiFi communication module, and the wired communication module is an RS232 communication module.

[0015] The beneficial effect of adopting the above further scheme is that by setting up a limited communication module and a wireless communication module, data communication can be carried out with the control circuit of the electronic detonator by using an intermediate wireless signal transmission platform or a wireless relay information device in the oil and gas well.

[0016] Furthermore, it also includes an external clock module, which includes a crystal oscillator Y3, a capacitor C10 and a capacitor C11, the two ends of the crystal oscillator Y3 are respectively electrically connected to the input end and the output end of the on-chip oscillator circuit of the single-chip microcomputer U1, one end of the capacitor C10 is electrically connected to one end of the crystal oscillator Y3, one end of the capacitor C11 is electrically connected to the other end of the crystal oscillator Y3, and the other end of the capacitor C10 and the other end of the capacitor C11 are both grounded.

[0017] Furthermore, it also includes a single-chip microcomputer reset module, which includes a capacitor C9 and a resistor R16, the positive electrode of the capacitor C9 is electrically connected to the output end of the power management module, the negative electrode of the capacitor C9 is electrically connected to the reset end of the single-chip microcomputer U1 and one end of the resistor R16, and the other end of the resistor R16 is grounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a circuit principle block diagram of the utility model;

[0019] Figure 2 A circuit diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the port distribution of the microcontroller. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] like Figure 1As shown, this embodiment provides a control circuit for electronic detonators for oil and gas wells, including a power management module, a communication module, a single-chip microcomputer U1, a programmable read-only memory, a driving module, an energy storage module and a detonation module; the power output end of the power management module is electrically connected to the power input end of the communication module, the power input end of the single-chip microcomputer U1, the power input end of the programmable read-only memory and the power input end of the driving module respectively, the signal transceiver end of the communication module is electrically connected to the signal transceiver end of the single-chip microcomputer U1, the serial communication end of the single-chip microcomputer U1 is electrically connected to the data transmission end of the programmable read-only memory, the signal output end of the single-chip microcomputer U1 is electrically connected to the control end of the driving module, the output end of the driving module is electrically connected to the positive electrode of the energy storage module and the positive electrode of the detonation module respectively, and the negative electrode of the energy storage module and the negative electrode of the detonation module are both grounded. In the specific design process, the power management module may include a battery and a multi-power management device. The multi-power management device converts the voltage of the positive and negative poles of the battery and outputs multiple DC voltages of different sizes. The multiple DC voltages of different sizes provide power supply voltages for the power management module, communication module, single-chip microcomputer U1, programmable read-only memory, drive module and energy storage module respectively.

[0023] like Figure 2 As shown, the driving module includes a signal amplifying unit and a switching unit, the in-phase input terminal of the signal amplifying unit is electrically connected to the signal output terminal of the single-chip computer U1, the inverting input terminal of the signal amplifying unit is grounded, the output terminal of the signal amplifying unit is electrically connected to the base of the switching unit, the collector of the switching unit is electrically connected to the output terminal of the power management module, the positive electrode of the energy storage module and the positive electrode of the detonation module respectively, and the emitter of the switching unit is grounded.

[0024] Specifically, the signal amplification unit includes a resistor R2, a resistor R3 and an operational amplifier U2; one end of the resistor R2 is electrically connected to the signal output end of the single-chip computer U1, the other end of the resistor R2 is electrically connected to the in-phase input end of the operational amplifier U2, one end of the resistor R3 is electrically connected to the in-phase input end of the operational amplifier U2, the other end of the resistor R3 is electrically connected to the output end of the operational amplifier U2, the inverting input end of the operational amplifier U2 is grounded, and the output end of the operational amplifier U2 is electrically connected to the base of the switching unit.

[0025] Specifically, the switch unit includes a transistor Q1, a resistor R4 and a resistor R5, the base of the transistor Q1 is electrically connected to the output end of the operational amplifier U2, one end of the resistor R4 is electrically connected to the base of the transistor Q1, the other end of the resistor R4 and the emitter of the transistor Q1 are both grounded, the collector of the transistor Q1 is electrically connected to one end of the resistor R5, and the other end of the resistor R5 is electrically connected to the output end of the power management module, the positive electrode of the energy storage module and the positive electrode of the detonation module respectively.

[0026] Specifically, the energy storage module includes capacitors C1, C2 and C3, the positive electrodes of the capacitors C1, C2 and C3 are electrically connected to the other end of the resistor R5 and the positive electrode of the detonation module, and the negative electrodes of the capacitors C1, C2 and C3 are grounded.

[0027] Specifically, the driving module also includes an indicator light unit, which includes a resistor R1 and a light-emitting diode D2, one end of the resistor R1 is electrically connected to the output end of the power management module, the other end of the resistor R1 is electrically connected to the positive electrode of the light-emitting diode D1, and the negative electrode of the light-emitting diode D1 is electrically connected to the other end of the resistor R5.

[0028] The communication module includes a wireless communication module and a wired communication module, and the signal transceiver end of the single chip microcomputer U1 is electrically connected to the signal transceiver end of the wireless communication module and the signal transceiver end of the wired communication module respectively. The wireless communication module is an ESP8266 wireless WiFi communication module, and the wired communication module is an RS232 communication module.

[0029] The external communication device establishes communication with the single-chip computer U1 through the wireless communication module or the wired communication module. The external communication device needs to establish a secure communication connection with the single-chip computer U1 through the U ID code burned inside the programmable read-only memory. After the secure communication connection is established, the external communication device can send a detonation signal to the single-chip computer U1. After the single-chip computer U1 receives the detonation signal, it sends a high-level signal through the serial port P2.4. The high-level signal is amplified by the signal amplification device composed of the operational amplifier U2, the resistor R2 and the resistor R3, and then outputs an amplified voltage. After the amplified voltage passes through the resistor R4, the voltage at both ends of the resistor R4 drives the transistor Q1 to turn on. After the transistor Q1 is turned on, the voltage VCC provided by the power management module passes through the resistor R5 and then is grounded through the transistor Q1 to form a closed loop. The voltage at both ends of the resistor R5 supplies power to the detonation module F, so that the detonation module F is heated after being powered on to ignite the gunpowder in the electronic detonator.

[0030] like Figure 3 As shown, the single-chip computer U1 is connected to an external clock module, and the external clock module includes a crystal oscillator Y3, a capacitor C10 and a capacitor C11. The two ends of the crystal oscillator Y3 are respectively electrically connected to the input end and the output end of the on-chip oscillator circuit of the single-chip computer U1, one end of the capacitor C10 is electrically connected to one end of the crystal oscillator Y3, one end of the capacitor C11 is electrically connected to the other end of the crystal oscillator Y3, and the other end of the capacitor C10 and the other end of the capacitor C11 are both grounded.

[0031] The single-chip microcomputer U1 is connected with a single-chip microcomputer reset module, and the single-chip microcomputer reset module includes a capacitor C9 and a resistor R16. The positive electrode of the capacitor C9 is electrically connected to the output end of the power management module, and the negative electrode of the capacitor C9 is electrically connected to the reset end RES of the single-chip microcomputer U1 and one end of the resistor R16, respectively, and the other end of the resistor R16 is grounded. When the single-chip microcomputer U1 is powered on, the voltage output by the power management module charges the capacitor C9. When the capacitance of the capacitor C9 meets the high-level voltage required to drive the single-chip microcomputer U1 to reset, the single-chip microcomputer U1 is reset. After the reset, after the capacitor C9 is amplified, the potential of one end of the resistor R16 is zero, and the single-chip microcomputer U1 will not be reset again during the entire working process. It should be noted that the use of a single-chip microcomputer to implement UID security management is a prior art, and therefore, the present utility model does not involve improvements to computer programs.

[0032] The embodiment of the utility model can realize the safety management of external signals by using the programmable read-only memory pre-stored with unique identity information, i.e., UID code, in cooperation with the single-chip microcomputer by providing a single-chip microcomputer. Thus, the safety management performance of electronic detonators for oil and gas wells is improved. At the same time, by providing a limited communication module and a wireless communication module, data communication can be performed with the control circuit of the electronic detonator by using an intermediate wireless signal transmission platform or a wireless relay information device in the oil and gas well, so as to facilitate long-distance communication with the control platform on the ground.

[0033] In some other embodiments, the detonation module F in the control circuit of the electronic detonator for oil and gas wells in this embodiment can be set in the electronic detonator, and the power management module, communication module, single-chip microcomputer U1, programmable read-only memory, drive module and energy storage module can be integrated in a control box. The box body of the control box is made of heat-insulating material or is a heat-insulating box body, and a temperature control device is arranged in the control box body. The temperature control device can be implemented by air conditioning and other devices, so that the entire control box can work normally in a high temperature environment of about 200°C under the oil and gas well.

[0034] This embodiment solves the problems of the traditional electric detonator detonation circuit for oil and gas wells being simple, low in safety performance, lacking the "three-code control" function, and being unfavorable for safety management, and realizes operation in an ultra-high temperature (200°C) environment in an oil and gas well; realizes online communication with the ground detonation controller at an ultra-long distance of 10,000 meters. The unique identity information (UID code) can be burned to realize "three-code control".

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the concept and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control circuit for an electronic detonator for oil and gas wells, characterized in that: It includes a power management module, a communication module, a single-chip microcomputer U1, a programmable read-only memory, a driving module, an energy storage module and a detonation module; the power output end of the power management module is electrically connected to the power input end of the communication module, the power input end of the single-chip microcomputer U1, the power input end of the programmable read-only memory and the power input end of the driving module respectively, the signal transceiver end of the communication module is electrically connected to the signal transceiver end of the single-chip microcomputer U1, the serial communication end of the single-chip microcomputer U1 is electrically connected to the data transmission end of the programmable read-only memory, the signal output end of the single-chip microcomputer U1 is electrically connected to the control end of the driving module, the output end of the driving module is electrically connected to the positive electrode of the energy storage module and the positive electrode of the detonation module respectively, and the negative electrode of the energy storage module and the negative electrode of the detonation module are both grounded.

2. The control circuit of the electronic detonator for oil and gas wells according to claim 1 is characterized in that: The driving module includes a signal amplifying unit and a switching unit. The in-phase input terminal of the signal amplifying unit is electrically connected to the signal output terminal of the single-chip computer U1, the inverting input terminal of the signal amplifying unit is grounded, the output terminal of the signal amplifying unit is electrically connected to the base of the switching unit, the collector of the switching unit is electrically connected to the output terminal of the power management module, the positive electrode of the energy storage module and the positive electrode of the detonation module respectively, and the emitter of the switching unit is grounded.

3. The control circuit of the electronic detonator for oil and gas wells according to claim 2 is characterized in that: The signal amplification unit includes a resistor R2, a resistor R3 and an operational amplifier U2; one end of the resistor R2 is electrically connected to the signal output end of the single-chip computer U1, the other end of the resistor R2 is electrically connected to the in-phase input end of the operational amplifier U2, one end of the resistor R3 is electrically connected to the in-phase input end of the operational amplifier U2, the other end of the resistor R3 is electrically connected to the output end of the operational amplifier U2, the inverting input end of the operational amplifier U2 is grounded, and the output end of the operational amplifier U2 is electrically connected to the base of the switch unit.

4. The control circuit of the electronic detonator for oil and gas wells according to claim 3 is characterized in that: The switch unit includes a transistor Q1, a resistor R4 and a resistor R5, the base of the transistor Q1 is electrically connected to the output end of the operational amplifier U2, one end of the resistor R4 is electrically connected to the base of the transistor Q1, the other end of the resistor R4 and the emitter of the transistor Q1 are both grounded, the collector of the transistor Q1 is electrically connected to one end of the resistor R5, and the other end of the resistor R5 is electrically connected to the output end of the power management module, the positive electrode of the energy storage module and the positive electrode of the detonation module respectively.

5. The control circuit of the electronic detonator for oil and gas wells according to claim 4 is characterized in that: The energy storage module includes capacitors C1, C2 and C3, the positive electrodes of the capacitors C1, C2 and C3 are all electrically connected to the other end of the resistor R5 and the positive electrode of the detonation module, and the negative electrodes of the capacitors C1, C2 and C3 are all grounded.

6. The control circuit of the electronic detonator for oil and gas wells according to claim 4, characterized in that: The driving module also includes an indicator light unit, which includes a resistor R1 and a light-emitting diode D2. One end of the resistor R1 is electrically connected to the output end of the power management module, the other end of the resistor R1 is electrically connected to the positive electrode of the light-emitting diode D1, and the negative electrode of the light-emitting diode D1 is electrically connected to the other end of the resistor R5.

7. The control circuit of the electronic detonator for oil and gas wells according to claim 1, characterized in that: The communication module includes a wireless communication module and a wired communication module. The signal transceiver end of the single chip microcomputer U1 is electrically connected to the signal transceiver end of the wireless communication module and the signal transceiver end of the wired communication module respectively.

8. The control circuit of the electronic detonator for oil and gas wells according to claim 7, characterized in that: The wireless communication module is an ESP8266 wireless WiFi communication module, and the wired communication module is an RS232 communication module.

9. The control circuit of the electronic detonator for oil and gas wells according to claim 1, characterized in that: It also includes an external clock module, which includes a crystal oscillator Y3, a capacitor C10 and a capacitor C11. The two ends of the crystal oscillator Y3 are electrically connected to the input end and the output end of the on-chip oscillator circuit of the single-chip microcomputer U1 respectively, one end of the capacitor C10 is electrically connected to one end of the crystal oscillator Y3, one end of the capacitor C11 is electrically connected to the other end of the crystal oscillator Y3, and the other end of the capacitor C10 and the other end of the capacitor C11 are both grounded.

10. The control circuit of the electronic detonator for oil and gas wells according to claim 1, characterized in that: It also includes a single-chip microcomputer reset module, which includes a capacitor C9 and a resistor R16. The positive electrode of the capacitor C9 is electrically connected to the output end of the power management module, and the negative electrode of the capacitor C9 is electrically connected to the reset end of the single-chip microcomputer U1 and one end of the resistor R16 respectively, and the other end of the resistor R16 is grounded.

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