Control device and control method thereof for oil-gas well multistage perforator
A control device and perforator technology, applied in earthwork drilling, wellbore/well components, mining fluids, etc., can solve problems such as potential safety hazards, lack of fault detection functions, spurious ignition current and misinitiation of detonators, etc., to achieve Low cost, easy to implement, and high reusability
Inactive Publication Date: 2013-09-18
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
However, the above-mentioned technology still needs to be improved in terms of safety and reliability, because it is easy to cause the stray nature of the ignition current of the next-stage perforator to accidentally detonate the detonator just connected to the upper-stage perforator during ignition, causing potential safety hazards
In addition, there is a lack of fault detection functions, etc.
Method used
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[0041] First install two sealing rings and four shear pins on the actuating piston 10, install the lower wiring pin 11 and the on-off insertion rod 9 at the corresponding positions of the actuating piston, and then turn the on-off insertion rod 9 to the left to move the actuating piston 10 from the The right end of the sub-joint 2 of the graded perforation is inserted, and the shear pin just falls on the step between 211 and 210; the control circuit board 7 is fixed on the middle fixed plate 8, and the control circuit board 7 faces left from the graded shot. Insert the left end of the joint 2 under the hole, and land on the step between 208 and 213. The upper two fixing screws are fixed on 209, and let the upper end of the lower connection pin 11 and the left end of the on-off insertion rod 9 fix the corresponding channel of the plate 8 from the middle. Stretch out, the lower wiring pin 11 is connected to the lower connection pin of the control circuit board 7, the on-off inser...
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The invention provides a control device and a control method thereof for an oil-gas well multistage perforator, comprising a staged perforation upper joint and a staged perforation lower joint which are connected together, wherein the other end of the staged perforation upper joint is connected with a former stage perforator, and the other end of the staged perforation lower joint is connected with a next stage perforator; a staged perforation control device is mounted in the staged perforation lower joint, and the staged perforation control device comprises a former stage wiring contact pin arranged at the upper port of the staged perforation lower joint and a next stage wiring contact pin arranged at the lower port of the staged perforation lower joint, an on-off insertion rod is arranged between the former stage wiring contact pin and the next stage wiring contact pin, and the lower end of the next stage wiring contact pin is connected with a telescopic connecting contact pin component; the staged perforation control device also comprises a control circuit board used for connecting and controlling the former stage wiring contact pin and the next stage wiring contact pin. The situation that a detonator just switched on by the former stage perforator is detonated by the next stage perforator due to the spurious ignition current is effectively avoided, the control device and the control method thereof can be used for detecting the on-off situation of a circuit in the corresponding stage, and the safety and reliability of the staged perforation control device are improved.
Description
technical field [0001] The invention relates to perforating equipment and tools for oil and gas wells, in particular to a control device and a control method for realizing multi-stage perforator connection and step-by-stage ignition of oil and gas wells. Background technique [0002] Oil and gas well staged perforation technology refers to the use of special control devices to connect multi-stage perforators and bridge plug tools, and use cables to lower the assembled multi-stage perforators and tools into the well at one time. The target layer is ignited and perforated step by step and the tool works. For some oil and gas wells, multiple oil and gas intervals need to be perforated in one completion, and the thickness of each interval is thin, and the interval between intervals is large. Engineering operations, or the use of oil pipes to connect perforators to transport perforation, has the disadvantages that the number of times the cable is transported downhole is long, an...
Claims
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IPC IPC(8): E21B43/1185
Inventor 张林张脉泉李加庆刘云刚朱元飞
Owner CHINA PETROLEUM & CHEM CORP
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