Self-adaptive rotary steering drilling tool

By employing a nested double-spring structure and multi-stage shock absorption design, the problem of excessive impact force on drill bits under complex formation conditions in existing rotary steerable drilling tools has been solved, resulting in better formation adaptability and drilling stability, extended drill bit life, and reduced costs.

CN223964431UActive Publication Date: 2026-03-03XINJIANG ZHONGNENG VENTURE CAPITAL ENERGY DEV CO LTD
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Patent Information

Application Number
CN202520890380.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-08
Publication Date
2026-03-03
Estimated Expiration
2035-05-08

AI Technical Summary

Technical Problem

When dealing with complex and varied formation conditions, the stiffness of a single spring in existing rotary steerable drilling tools is difficult to adapt to different pressure requirements, resulting in excessive impact force on the drill bit, affecting drilling stability and efficiency, and the buffer response speed is slow.

Method used

It adopts a nested double spring structure, including an outer low-stiffness helical spring and an inner high-stiffness conical spring, combined with a multi-stage damping design, and equipped with a tungsten carbide wear-resistant layer and a sealing rubber ring to achieve graded damping and pre-pressure adjustment.

Benefits of technology

It effectively adapts to different formation pressures, protects cutting teeth, extends drill bit life, improves drilling efficiency, reduces operating costs, and enhances tool operability and flexibility.

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Abstract

The utility model relates to the field of drilling tools for wells, in particular to a self-adaptive rotary steering drilling tool which comprises a drill bit body and a damping column, a plurality of blades are sequentially arranged on the crown portion of the drill bit body in the circumferential direction, the cutting faces of the blades are fixedly connected with a plurality of cutting teeth, and mounting holes are formed in the outer side faces of the blades. Steel sleeves are fixedly arranged in the mounting holes, the damping columns are movably inserted in the steel sleeves, the ends, located in the steel sleeves, of the damping columns are fixedly connected with connecting bases, adjusting plates are arranged between the connecting bases and the bottoms of the steel sleeves, and outer-layer low-rigidity spiral springs are connected between the adjusting plates and the connecting bases. An inner layer high-rigidity conical spring is arranged on the inner side of the outer layer low-rigidity spiral spring, and an adjusting assembly for adjusting the adjusting plate and the bottom of the steel sleeve is arranged on the steel sleeve. The drill bit can better adapt to different pressure requirements, and the drill bit is prevented from bearing overlarge impact force, so that the cutting teeth are protected, and the service life of the drill bit is prolonged.
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