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What are the safety measures to prevent gas drainage during drilling?
Release time:
2022-11-09
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What are the safety measures to prevent gas drainage during drilling?
- What are the safety measures to prevent gas drainage during drilling?
- During the construction of drainage drilling, the blowout prevention device (coal-water and gas separator) shall be installed at the orifice and connected with the negative pressure drainage pipeline with valve;
- At the beginning of construction, slow down the drilling speed and keep the low pressure to prevent the blowout preventer from punching out the hole. Adjust the drilling pressure and speed reasonably according to the amount of coal water;
- During the disassembly and assembly of the drill pipe, the operator shall operate on the side to prevent coal, water and gas from the rear of the drill pipe from hurting people;
- If coal, water and gas continue to be ejected from the rear of the drill pipe, stop drilling immediately and check the ambient gas concentration. If the gas concentration exceeds the limit or continues to rise, cut off the power supply immediately, withdraw personnel and report.
- In the event of a nozzle hole, stop drilling immediately, push and pull the drill pipe back and forth, and perform high-pressure hydraulic punching for slag discharge.
- Before and after the drilling rig when working in the return air flow of the heading faceThe gas concentration within 10 meters is greater than 0.3, and when operating in full wind pressure and wind flow, the gas concentration within 10 meters before and after the drilling rig is greater than 0.6, drilling is strictly prohibited.
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Key words:
What, gas, drilling, drill pipe, immediately, job, concentration, nozzle, appear, stop
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