Gas outburst prevention drill pipe and preparation method thereof

By installing a damping mechanism inside the drill pipe and using counterweights and springs to absorb vibration energy, the problem of swaying in the middle section of the drill pipe was solved, achieving high stability and low-cost drilling results.

CN122407089APending Publication Date: 2026-07-17PINGDINGSHAN GUAN HONG MINING TECH & EQUIP LIMITED
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PINGDINGSHAN GUAN HONG MINING TECH & EQUIP LIMITED
Filing Date
2026-05-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In long-distance drilling, existing technologies cause significant shaking in the middle section of the drill rod, leading to increased borehole diameter, borehole wall breakage, and a high risk of borehole collapse. Furthermore, existing vibration reduction solutions are costly and complex, and cannot effectively suppress the severe shaking in the middle section of the drill rod.

Method used

A damping mechanism, including a counterweight and a circumferential elastic structure, is installed inside the drill pipe. The inertial mass of the counterweight and the deformation of the spring are used to absorb and dissipate vibration energy. The damping mechanism is densely arranged in the middle section of the drill pipe through a non-uniform distribution to suppress swaying.

Benefits of technology

It significantly improves the stability and hole quality of ultra-long drill pipes, reduces the risk of hole collapse, simplifies manufacturing and maintenance costs, and increases the effective flow cross section of the borehole.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN122407089A_ABST
    Figure CN122407089A_ABST
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Abstract

A gas outburst prevention drill rod comprises a rod body, a cavity is arranged in the rod body in the axial direction, a damping mechanism is arranged in the cavity, the damping mechanism comprises a counterweight, an elastic structure is arranged in the circumferential direction of the counterweight, one end of the elastic structure is connected with the counterweight, and the other end of the elastic structure is connected with the rod body. By arranging the damping mechanism composed of the counterweight and multiple groups of circumferential springs in the cavity of the drill rod, the inertia mass of the counterweight and the deformation of the spring are utilized to absorb and dissipate vibration energy. The scheme is directly installed on the existing standard drill rod without changing the appearance of the drill rod or sacrificing the internal rigidity. Especially for the bending moment distribution characteristics of the 300-meter super-long drill rod, the damping units are densely arranged in the middle section, which can effectively suppress the large swing of the drill rod and significantly improve the stability and hole forming quality of the super-long drilling.
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