A hole-forming device and hole-forming method for a precipitation well

By using a drilling device with a water channel and an air cushion, water spraying and air cushion support are used to prevent wellhead collapse, thus solving the problem of wellhead collapse during drilling and improving construction efficiency and equipment safety.

CN116446802BActive Publication Date: 2026-05-29JIANGSU JIANYU CONSTR GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU JIANYU CONSTR GRP CO LTD
Filing Date
2023-05-26
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

During the drilling process, the borehole opening is prone to collapse, which can delay the construction process and potentially damage the drilling rig.

Method used

A drilling device with a water channel and an air cushion is used. Water spraying and air cushion support prevent collapse. The air cushion expands and supports the wellhead under the action of the limiting casing. Combined with a water collection tank and drainage ditch, mud is treated to prevent mud erosion.

Benefits of technology

It improves drilling efficiency, prevents wellhead collapse, protects drilling equipment, keeps wellheads dry, and prevents soil loosening.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116446802B_ABST
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Abstract

The application provides a hole-forming device and hole-forming method of a precipitation well, and relates to the field of building construction. The device comprises a roller bit machine provided with a drill rod and a drill bit, the drill rod drives the drill bit to drill downward to form a shaft, and a water delivery channel is arranged in the drill rod to spray water toward the drill bit; an annular air cushion is arranged on the outer side of the drill rod, an air pipe is connected with a gas supply device to input gas into the air cushion, the outer side of the air cushion is attached to the shaft, the inner side of the air cushion is provided with a limiting sleeve, and a gap exists between the limiting sleeve and the drill rod; a plurality of vertical mud channels are arranged in the air cushion on the other side of the air cushion. The application has the effect of preventing the collapse of the hole opening part during the drilling process.
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