Title:
FLEXIBLE STEERING DRILLING TOOL
Document Type and Number:
WIPO Patent Application WO/2022/179569
Kind Code:
A1
Abstract:
A flexible steering drilling tool, comprising a flexible drive drill string (200) and a steering short section (100); the flexible drive drill string comprises a plurality of bearing short sections (210) connected in sequence from top to bottom, drilling power being transmitted between adjacent bearing short sections by means of a universal weight-on-bit torque deflection transmission mechanism (220); also comprising a deflection steering mechanism arranged inside the flexible steering drilling tool and a deflection control system for driving the deflection steering mechanism to move so that the drilling direction of a drill bit (110) changes; the deflection control system comprises a drive control apparatus and a flexible transmission mechanism (113); and the drive control apparatus controls the movement of the deflection steering mechanism by means of controlling the flexible transmission mechanism to reciprocate, rotate, or swing. The present flexible steering drilling tool can implement drilling of short-to-very short-radius wellbores or continue to steer drilling through short-to-very short-radius wellbores.
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Inventors:
XU ZICHEN (CN)
WAN XIAOYUE (CN)
WAN XIAOYUE (CN)
Application Number:
PCT/CN2022/077722
Publication Date:
September 01, 2022
Filing Date:
February 24, 2022
Export Citation:
Assignee:
WAN XIAOYUE (CN)
International Classes:
E21B7/04; E21B10/42; E21B10/60; E21B17/05; E21B17/20
Foreign References:
| CN112267830A | 2021-01-26 | |||
| CN112324332A | 2021-02-05 | |||
| CN113153151A | 2021-07-23 | |||
| CN113482526A | 2021-10-08 | |||
| CN112814568A | 2021-05-18 | |||
| CN101078335A | 2007-11-28 | |||
| CN111827884A | 2020-10-27 | |||
| CN112392410A | 2021-02-23 | |||
| KR20100127588A | 2010-12-06 |
Attorney, Agent or Firm:
HAIHONG JIACHENG INTELLECTUAL PROPERTY & PARTNERS (CN)
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