Gas lift reverse circulation drilling process

A gas lift reverse circulation and process technology, which is applied in drilling equipment, earthwork drilling, drilling equipment and methods, etc., to reduce labor intensity, reduce production costs, and improve drilling efficiency.

Active Publication Date: 2010-12-29
河北伟业地热新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a gas lift reverse circulation drilling process that can solve the blockage of the drill bit water hole without pulling out all the drilling tools

Method used

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Embodiment Construction

[0016] As shown in the figure, the process steps of gas lift reverse circulation drilling process are as follows: ①Remove the double-arm kelly and fill the core pipe with liquid, then reinstall the double-arm kelly; ②Close the outlet of the slag discharge pipe Start the air compressor to supply air to the high-pressure valve at the place, ③When the intake pressure rises to 5.5-6Mpa, quickly open the high-pressure valve at the outlet of the slag discharge pipe.

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Abstract

The invention discloses a gas lift reverse circulation drilling process. The process comprises the following steps of: (1) demounting a double-arm square drill rod, fully filling liquid into a core barrel, and re-arranging the double-arm square drill rod; (2) closing a high-pressure valve at an outlet of a dreg discharging pipe and starting an air compressor to supply air; and (3) when the air pressure is raised to 5.5 to 6MPa, quickly opening the high-pressure valve at the outlet of the dreg discharging pipe. The gas lift reverse circulation drilling process can solve the problem of dill water inlet blockage without needing pulling out all drilling tools.

Description

technical field [0001] The present invention relates to a drilling technology, especially a kind of unforeseen accidents such as sudden failure of air compressor, poor sealing of gas circuit, sudden power failure and other unforeseen accidents during the drilling process. Drilling tools can solve the gas lift reverse circulation drilling process in which the water hole of the drill bit is blocked. Background technique [0002] At present, in the normal drilling process, unforeseen accidents such as air compressor failure, poor sealing of the gas circuit, and sudden power failure often occur. After the accident, the drill cuttings during the ascent process in the drill tool will fall down, causing the bottom of the circulation channel (the part above the water hole of the drill bit) to be blocked by the drill cuttings. After the failure of the air compressor, poor sealing of the air circuit, sudden power failure and other accidents are eliminated, the normal drilling cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/00E21B21/00
Inventor 阴文行冯洪喜
Owner 河北伟业地热新能源科技有限公司
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