Wide-range inputting and voltage stabilizing power supply circuit for downhole perforation ignition control circuit

Abstract

The invention discloses a wide-range inputting and voltage stabilizing power supply circuit for a downhole perforation ignition control circuit. The wide-range inputting and voltage stabilizing power supply circuit comprises five diodes D1, D2, D5, D6 and D7, two resistors R1 and R2, four capacitors C1, C8, C9 and C10, and two CMOS (Complementary Metal-Oxide-Semiconductor Transistor) field-effect tubes Q1 and Q10, wherein the connecting relationships are as follows: an anode of the D2 is connected with a cable sheath; a cathode of the D2 is connected with one end of the R1; the other end of the R1 is connected with one end of the R2; a gate electrode of the Q1, one end of the C1 and a cathode of the D6 are respectively connected with the other end of the R2; the other end of the C1 is connected with a cable core; an anode of the D6 is connected with a gate electrode of the Q10 and a cathode of the D1; an anode of the D1 is connected with an anode of the D5; a cathode of the D5 is connected with the cable core; a drain electrode of the Q10 is connected with one end of the R1 and one end of the C1; the other end of the C1 is connected with a cathode of the D7; an anode of the D7 is connected with the cable core; a source electrode of the Q1 is connected with the drain electrode of the Q10; a source electrode of the Q10 is connected with one end of the C8; the other end of the C8 is connected with the cable core. The output voltage is always in a safe range, 5V and 10V voltage can be reliably and stably output and supplied to the operation of the downhole ignition control circuit, and the special requirements of the downhole ignition control circuit for clustering perforation are met.

Description

[0001] technical field [0002] 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 [0003] 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 s...

AI Technical Summary

Problems solved by technology

[0006] 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

[0007] 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

[0008] 3. The existing downhole electric detonator control circuit does not have a special voltage stabilization circuit, which cannot guarantee that the output voltage is always within a safe range, and cannot reliably and stably output 5V and 10V voltages to supply the downhole ignition control circuit, thus failing to meet the clustering requirements Special Requirements of Ignition Control Circuit in Perforated Hole

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