Title:
APPARATUS AND METHOD FOR CONTROLLING A PART OF A DOWNHOLE ASSEMBLY, AND A DOWNHOLE ASSEMBLY
Document Type and Number:
WIPO Patent Application WO/2013/186554
Kind Code:
A3
Abstract:
This invention relates to an apparatus and method for controlling a part of a downhole assembly (10), and to the downhole assembly. The downhole assembly may include a steering mechanism (14) adapted to steer a drill bit (12) in a chosen direction, and the steering mechanism may be the part of the downhole assembly which is controlled by the apparatus. The downhole assembly includes a drill bit (12) and a motor (18), the motor having a stator (36) and a rotor (38), the rotor being driven to rotate relative to the stator by the passage of a drilling fluid along a drilling fluid path between the rotor and the stator. The motor has a conduit (52) through which the drilling fluid can pass, the conduit being separate from the drilling fluid path, and the apparatus has a valve (58) to control the flow of drilling fluid through the conduit. The invention provides a robust and reliable means of delivering high pressure drilling fluid downstream of the motor.
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Inventors:
CROWLEY DANIEL BRENDAN (GB)
WALKER COLIN (GB)
WALKER COLIN (GB)
Application Number:
PCT/GB2013/051536
Publication Date:
June 05, 2014
Filing Date:
June 11, 2013
Export Citation:
Assignee:
SMART STABILIZER SYSTEMS LTD (GB)
CROWLEY DANIEL BRENDAN (GB)
WALKER COLIN (GB)
CROWLEY DANIEL BRENDAN (GB)
WALKER COLIN (GB)
International Classes:
E21B4/02; E21B7/08; E21B21/10
Domestic Patent References:
WO2012138383A2 | 2012-10-11 |
Foreign References:
US20050173157A1 | 2005-08-11 | |||
US20060243493A1 | 2006-11-02 | |||
GB2450498A | 2008-12-31 | |||
US20040104051A1 | 2004-06-03 | |||
US20100116551A1 | 2010-05-13 |
Attorney, Agent or Firm:
GEE, Steven (1 South Lynn GardensLondon Road,Shipston on Stour, Warwickshire CV36 4ER, GB)
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