Drilling system and rig

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By designing a drilling system in a down-the-hole drill rig, adopting drilling mode and top-off mode, and adjusting the feed force of the power head, the problem of easy damage to the drill rod connection threads was solved, thereby improving efficiency and reducing costs.

CN115559956BActive Publication Date: 2026-05-29JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD +1

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD
Filing Date: 2022-10-25
Publication Date: 2026-05-29

AI Technical Summary

Technical Problem

The drill rod connecting threads of down-the-hole drills are prone to damage, making operation difficult, affecting the service life of the drill rod, and resulting in higher drilling efficiency and costs.

Method used

Design a drilling system including a power head, drill pipe, a first motor, an oil supply device, and a pressure control valve group. By setting drilling mode and unscrewing mode, the feed force of the power head can be adjusted to protect the drill pipe connection threads.

Benefits of technology

It improves the operating efficiency of the drilling system, reduces equipment wear and tear, lowers construction costs, and extends the service life of the drill pipe.

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Figure CN115559956B_ABST

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Abstract

The present application relates to a drilling system and a drilling rig, wherein the drilling system comprises a power head (1), a drill rod, a first motor (2), an oil supply device (3), a first connecting oil circuit and a pressure control valve group (4), the drill rod is connected with the power head (1), the first motor (2) is configured to drive the power head (1) to reciprocate along a feeding direction, and the first connecting oil circuit is connected between the first motor (2) and the oil supply device (3). The drilling system comprises a drilling mode and a make and break mode, in the drilling mode, the power head (1) is connected with the drill rod and reciprocates along the feeding direction, in the make and break mode, the power head (1) reciprocates along the axial direction of the drill rod relative to the drill rod, and the pressure control valve group (4) is configured to adjust the pressure of the first connecting oil circuit in the make and break mode, so as to control the size of the feeding force of the power head (1). The drilling rig comprises the above drilling system.

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