Title:
ROTARY STEERING TOOL AND TRANSMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/224510
Kind Code:
A1
Abstract:
A rotary steering tool, comprising: a power unit (130) having an output shaft capable of outputting torque and a bias driving part capable of outputting a radial force and/or an axial force; a transmission shaft (1202) connected to the output shaft; a support shaft connected to the transmission shaft (1202) by means of a rotating structure, a rotation axis of the rotating structure being perpendicular to an axis of the output shaft, the support shaft having an inner wall defining an accommodating cavity and a forward end and a backward end formed at two ends of the accommodating cavity, the rotation center of the rotating structure being located in the accommodating cavity, and the backward end of the support shaft being capable of being driven by the radial force outputted by the bias driving part; and a drill bit (110) having a drill bit tail end, the drill bit (110) being connected, at the drill bit tail end, to the forward end of the support shaft. The present invention can improve the deflecting capability of a drill tool and reduce the energy consumption for driving the drill tool.
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Inventors:
LIU QINGBO (CN)
DI QINGYUN (CN)
YANG YONGYOU (CN)
DI QINGYUN (CN)
YANG YONGYOU (CN)
Application Number:
PCT/CN2020/087944
Publication Date:
November 12, 2020
Filing Date:
April 30, 2020
Export Citation:
Assignee:
INST GEOLOGY & GEOPHYSICS CAS (CN)
International Classes:
E21B4/00; E21B7/04
Foreign References:
| CN110080682A | 2019-08-02 | |||
| CN102066793A | 2011-05-18 | |||
| CN207813495U | 2018-09-04 | |||
| US3733853A | 1973-05-22 | |||
| US20170082152A1 | 2017-03-23 |
Attorney, Agent or Firm:
BEIJING JUNHUI INTELLECTUAL PROPERTY AGENT OFFICE (ORDINARY PARTNERSHIP) (CN)
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