CORING DRILL TOOL DRIVING STRUCTURE

WIPO Patent Application WO/2020/093408

A1

A coring drill tool driving structure, comprising a driving motor (7), an outer cylinder (23) and a coring drill tool (8). The driving motor comprises an outer rotor (73) and an inner stator (75), the inner wall of the outer rotor and the outer wall of the inner stator are provided with ribs (77) mutually matched, the outer rotor and the inner stator are in clearance fit, the clearance between the outer rotor and the inner stator is a driving liquid flow path (74), the outer rotor length is smaller than the inner stator length, the outer rotor is located between front and rear ends of the inner stator, the outer rotor is connected to the outer cylinder, a front end of the outer cylinder is connected to the coring drill tool, and a rear end of the inner stator is connected to a coupling (76). The coring drill tool driving structure can be matched with a ground device to control an underground device of a coring drilling machine to work according to coring steps and implement long distance mud-driven drilling and coring. A driving system has high power, infinitely variable speed, and micro disturbance, the drilling speed can be improved, and the coring efficiency can also be improved.

XIE HEPING (CN)
GAO MINGZHONG (CN)
CHEN LING (CN)
ZHANG ZHILONG (CN)
GUO JUN (CN)
ZHANG ZETIAN (CN)
ZHANG RU (CN)
LU YIQIANG (CN)
LI CONG (CN)
HE ZHIQIANG (CN)

PCT/CN2018/114960

May 14, 2020

November 12, 2018

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UNIV SHENZHEN (CN)
UNIV SICHUAN (CN)

E21B25/00

CN202194564U	2012-04-18
CN202627986U	2012-12-26
RU2046177C1	1995-10-20
CN1587635A	2005-03-02
CN102619484A	2012-08-01
CN106761382A	2017-05-31
CN106869806A	2017-06-20
JP2001262969A	2001-09-26

GAOYUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)

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