Reamer hammer composite drill bit and air jet ejector cuttings removal drilling system

By using a combined drilling tool with a reamer and an air jet slag removal system, and by utilizing a spiral guide drill bit and an air jet slag removal assembly, the problems of drill bit tilt and low efficiency were solved, resulting in a more efficient drilling effect.

CN122304618APending Publication Date: 2026-06-30STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JINHUA POWER SUPPLY CO +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JINHUA POWER SUPPLY CO
Filing Date
2026-04-15
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing drilling tools are prone to tilting during the drilling process, resulting in deviations in the drilling direction, slow drilling speed, and low overall efficiency.

Method used

The drilling tool employs a reaming hammer composite drill, which includes a spiral guide drill bit and an air jet slag removal assembly. The spiral guide drill bit is conical with a diameter smaller than the disk seat and has threads on its outer circumference for guidance, positioning, and self-drilling. The air jet slag removal assembly removes debris through high-pressure gas and, in conjunction with a vibratory hammer and drive tube, performs reaming drilling.

Benefits of technology

It improves the accuracy and efficiency of drilling, avoids drill bit skew, and enhances the overall drilling effect.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122304618A_ABST
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Abstract

This invention discloses a reaming hammer composite drill bit and an air-jet cuttings removal drilling system, belonging to the field of air-jet cuttings removal drilling technology, and designed to solve the problem of low drilling efficiency of existing drill bits. The reaming hammer composite drill bit disclosed in this invention includes: a base; an air-jet cuttings removal assembly; and a spiral guide drill bit. The cross-sectional area of ​​the spiral guide drill bit near the object to be drilled is smaller than the cross-sectional area away from the object to be drilled. The spiral guide drill bit has threads on its outer circumference, which guide and position the reaming hammer composite drill bit. The spiral guide drill bit is installed in the middle of the base, which not only makes the overall direction of the drill bit more controllable, but also makes the drilling reaction force from the spiral guide drill bit on the base more balanced, preventing the base from tilting and resulting in better drilling effect; it also has a self-drilling function, and the reaming function can effectively improve drilling efficiency.
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