Thin wall upset drill pipe for complex formations
By introducing a sealing mechanism and a guiding sliding mechanism into the wireline coring drill pipe, the problems of reverse circulation failure and borehole collapse caused by high-pressure gas escape are solved, friction is reduced, drill pipe life is extended, and drilling safety and efficiency are improved.
CN224648486UActive Publication Date: 2026-08-18WUXI DRILLING TOOLS FACTORY
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Patent Information
- Application Number
- CN202521835906.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-27
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-08-27
AI Technical Summary
Technical Problem
Existing wireline coring drill pipes suffer from problems such as high-pressure gas escape during drilling, leading to reverse circulation failure, borehole wall collapse, severe friction between inner and outer tubes, and short lifespan.
Method used
It employs a sealing mechanism and a guiding sliding mechanism, including structures such as sealing rings, balls, and an alloy outer layer, to enhance sealing performance and reduce friction, ensuring reverse circulation stability and drill pipe life.
Benefits of technology
It effectively prevents high-pressure gas from escaping, prevents borehole wall collapse, reduces frictional resistance, extends drill pipe service life, and improves drilling safety and efficiency.
✦ Generated by Eureka AI based on patent content.
Abstract
This utility model discloses a thin-walled, thickened wireline coring drill rod for complex strata, relating to the field of drill rod technology. It includes a drill rod body comprising an outer tube, with an inner tube slidably connected within the cavity of the outer tube. A first groove is formed on the top of the inner wall of the outer tube, engaging with a borehole elastic retaining ring. A first limiting groove is formed on the top of the inner tube, engaging with the bottom of the borehole elastic retaining ring. An upper connector is threaded to the top of the outer tube, and a lower connector is threaded to the bottom of the outer tube. The drill rod body provided by this utility model reduces wear on the inner and outer tube walls while preventing pressure loss leading to reverse circulation failure. This solves the problems of high-pressure gas escape during drilling causing reverse circulation failure and borehole wall collapse, as well as severe friction and short lifespan of existing wireline coring drill rods.
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