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Title:
DRILLING FLUID CHANNEL STRUCTURE OF CORE DRILLING RIG
Document Type and Number:
WIPO Patent Application WO/2020/093411
Kind Code:
A1
Abstract:
A drilling fluid channel structure of a core drilling rig, comprising: a fluid channel activation module, a pressure relief module, a flow diverging and blocking module, a driving fluid channel (41) and a cooling fluid channel (42). The fluid channel activation module, the pressure relief module and the flow diverging and blocking module are connected sequentially from the rear to the front. The driving fluid channel (41) and the cooling fluid channel (42) are connected at the rear side thereof to the flow diverging and blocking module. The driving fluid channel (41) comprises a driving section (411) located between a stator and a rotor of a driving motor. The driving fluid channel is provided with a driving fluid outlet (412) at the front side of the driving section (411). The cooling fluid channel (42) passes through a layer disposed between an integrity-preserving compartment (3) and an outer barrel (2). The outer barrel (2) is connected to a drill bit (22) at the front side thereof, and a front opening (421) of the cooling fluid channel is located at the drill bit (22). The drilling fluid channel structure of a core drilling rig can drive a motor to rotate a drill bit, cool the rotating drill bit, control the motor to start or stop, and can automatically release pressure after the motor is stopped.

Inventors:
GAO MINGZHONG (CN)
XIE HEPING (CN)
CHEN LING (CN)
GUO JUN (CN)
ZHANG ZHILONG (CN)
ZHANG ZETIAN (CN)
ZHANG RU (CN)
LU YIQIANG (CN)
LI CONG (CN)
HE ZHIQIANG (CN)
Application Number:
CN2018/114963
Publication Date:
May 14, 2020
Filing Date:
November 12, 2018
Export Citation:
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Assignee:
UNIV SHENZHEN (CN)
UNIV SICHUAN (CN)
International Classes:
E21B25/10; E21B10/60
Domestic Patent References:
WO2004029401A12004-04-08
WO1999020870A11999-04-29
Foreign References:
CN203066857U2013-07-17
CN105735928A2016-07-06
CN105003219A2015-10-28
Attorney, Agent or Firm:
GAOYUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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