WELL-DRILLING THRUSTER

WIPO Patent Application WO/2015/089937

A1

A well-drilling thruster. Same comprises, arranged at the rear extremity part, an electro-hydraulic composite pipe (11), an actuator used for driving the well-drilling thruster forward, and, sequentially fitted and connected, a drive motor (13), a shaker (14), and a drill head (15). Both front and rear extremities of the actuator respectively are connected to one centralizer (12). Flow channels in communication with the electro-hydraulic composite pipe (11) for a well-drilling fluid to pass through are provided within both the actuator and the centralizer (12). The actuator is also provided with flow channel B (2) used for return flow of the fluid. The well-drilling thruster provides: during an exploration and development process of an oil and gas well, obviation of the need for coordination with a land-based drilling rig or an offshore drilling platform, use of the well-drilling thruster for continuous well drilling, implementation of well-drilling fluid circulation and high-speed communication via the electro-hydraulic composite pipe, thus implementing to the greatest extent safe, highly efficient, and economical well drilling.

LIU QINGYOU (CN)
REN TAO (CN)
CHEN YONGHUA (CN)
BAO KAI (CN)

PCT/CN2014/071993

June 25, 2015

February 12, 2014

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UNIV SOUTHWEST PETROLEUM (CN)
LIU QINGYOU (CN)
REN TAO (CN)
CHEN YONGHUA (CN)
BAO KAI (CN)

E21B4/04; E21B6/04; E21B7/00

CN202483435U	2012-10-10
US20120241219A1	2012-09-27
US20040216921A1	2004-11-04
US2664454A	1953-12-29
US4938299A	1990-07-03
US4467879A	1984-08-28

CHENGDU JINYING PATENT OFFICE (CN)
成都金英专利代理事务所 (CN)

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