Title:
THREE-DIMENSIONAL WELL DRILLING TOOL
Document Type and Number:
WIPO Patent Application WO/2024/017412
Kind Code:
A1
Abstract:
A three-dimensional well drilling tool, comprising a drill bit (6), a universal joint string (100) and a variable-angle deflection bend connecter (95). The universal joint string comprises a plurality of universal joints connected in series, and the universal joint at the side closest to the drill bit is a first universal joint. The variable-angle deflection bend connecter comprises a first stabilizing member (1) and a second stabilizing member (2). The first stabilizing member is coaxially connected to a first coaxial matching surface (11) by means of a bearing. The first coaxial matching surface is provided on the lower body of the first universal joint. The second stabilizing member is coaxially connected to a second coaxial matching surface (21) by means of a bearing. The second coaxial matching surface is provided on the upper body of the first universal joint. The axes of the matching surface of the first stabilizing member and the matching surface of the second stabilizing member have an included angle of 1-15 degrees, such that a turn is generated between the lower body of the first universal joint and the upper body of the first universal joint.
Inventors:
XU ZICHEN (CN)
YANG ZHONGHUA (CN)
YANG ZHONGHUA (CN)
Application Number:
PCT/CN2023/120275
Publication Date:
January 25, 2024
Filing Date:
September 21, 2023
Export Citation:
Assignee:
BEIJING ALL STRATA TECH CO LTD (CN)
International Classes:
E21B7/08
Foreign References:
| US4442908A | 1984-04-17 | |||
| CN113202414A | 2021-08-03 | |||
| CN107676040A | 2018-02-09 | |||
| CN108457595A | 2018-08-28 | |||
| CN111287658A | 2020-06-16 | |||
| CN201934022U | 2011-08-17 | |||
| US4877092A | 1989-10-31 |
Attorney, Agent or Firm:
SUZHOU TUOHONG INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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