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Title:
SHORT-RADIUS DRILLING TOOL, HIGH-STABILITY TRACK-CONTROLLABLE FLEXIBLE DRILLING TOOL, AND METHOD
Document Type and Number:
WIPO Patent Application WO/2022/083601
Kind Code:
A1
Abstract:
A short-radius drilling tool, a high-stability track-controllable flexible drilling tool, and a method. The high-stability track-controllable flexible drilling tool comprises a flexible transmission short section string, a high-stability guiding drilling section, an electric driving actuator (92, 140), and a control circuit (32, 93, 230); the flexible transmission short section string can transmit rotary drilling power to the high-stability guiding drilling section and comprises a plurality of force transmission short sections (7), and each force transmission short section (7) at least comprises a variable-angle force transmission structure; the high-stability guiding drilling section comprises a drill bit guiding bearing body, a front-section main drill bit, a guiding actuating mechanism, and a rear-section gauge protection drill bit, and the high-stability guiding drilling section is connected to the flexible transmission short section string by means of the variable-angle force transmission structures; the electric driving actuator (92, 140) and the control circuit (32, 93, 230) are used for controlling the guiding actuating mechanism to achieve the guiding function; the flexible transmission short section string extends in the axis direction thereof to form a through structure capable of allowing drilling fluid to flow through.

Inventors:
XU ZICHEN (CN)
YANG ZHONGHUA (CN)
WAN XIAOYUE (CN)
Application Number:
PCT/CN2021/124795
Publication Date:
April 28, 2022
Filing Date:
October 19, 2021
Export Citation:
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Assignee:
WAN XIAOYUE (CN)
International Classes:
E21B7/04; E21B7/06; E21B17/20; E21B47/022; E21B47/12; E21B47/18; E21B49/00
Foreign References:
CN112878910A2021-06-01
CN112832681A2021-05-25
CN112324332A2021-02-05
CN112267831A2021-01-26
CN109854174A2019-06-07
US6318480B12001-11-20
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
Download PDF:
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