Signal detection and processing circuit for perforation ignition control circuit

Abstract

The invention discloses a signal detection processing circuit for a perforation ignition control circuit. The signal detection processing circuit for the perforation ignition control circuit comprises an amplifying circuit composed of an R4, an R11, an R13, a C3 and a Q6, output is conducted by a collector electrode of the Q6, a pin 5 of a U1 is connected with the collector electrode of the Q6, a pin1 of the U1 is connected with a 5V power source output by a wide-range input voltage-stabilized power circuit, a pin 8 is connected with a cable core, a pin 7 is connected with one end of an R3 and a grid electrode of a Q5, the other end of the R3 is connected with the 5V power source output by the wide-range input voltage-stabilized power circuit, one end of an R12 is connected with a 10V power source output by the wide-range input voltage-stabilized power circuit, the other end of the R12 is connected with a drain electrode of the Q5, a cathode of a D11, one end of a C6 and a grid electrode of a Q4, a source electrode of the Q5 is connected with an anode of the D11, the other end of the C6 and a source electrode of the Q4 and is connected with the cable core in parallel. According to the signal detection processing circuit for the perforation ignition control circuit, the dual functions of address inquiry and ignition are achieved, and therefore the purpose that an underground ignition control circuit in a specific address is ignited is achieved.

Description

technical field [0001] The invention relates to the technical field of electric detonator ignition control technology in downhole cluster control perforation. Cluster control perforation is a perforation technology that can realize low cost and high benefit in the exploitation of unconventional natural gas (shale gas, etc.), and belongs to Field of oil and gas well perforating instruments. Background technique [0002] In the exploitation of unconventional natural gas, because the shale gas reservoir is thin, the reservoir is numerous and discontinuous, when using the conventional tubing transmission perforation and cable transmission perforation, the perforating gun needs to be lifted and lowered many times, which has a large workload and high cost. Therefore, a perforation technology that can realize low-cost and high-efficiency oil and gas well development is needed. Clustered perforation technology came into being under this background. This technology uses a single-cor...

AI Technical Summary

Problems solved by technology

[0005] 1. In actual use, the coded grading perforation meter cannot reliably connect to the downhole electric detonator, and the electric detonator is often detonated due to accidental conduction of the circuit and connected to the ignition circuit, resulting in misperforation engineering accidents

[0006] 2. After the electric detonator detonates the perforating gun, the perforating gun breaks and pours into the well fluid, which will cause a short circuit

[0007] 3. There is no mature signal detection and processing circuit in the prior art, and the dual functions of address query and ignition cannot be realized, so the purpose of igniting the underground ignition control circuit of a specific address cannot be realized.

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