Title:
DRILL STRING WITH MODULAR MOTOR UNITS
Document Type and Number:
WIPO Patent Application WO/2010/063999
Kind Code:
A3
Abstract:
A turbine (100) for use in a downhole drill string including an elongated casing defining an interior and a plurality of motor units (104) in the interior. Each motor unit has a rotor (114) and a stator (112). A torque transmission couplings connects each of the plurality of motor units to the drill string. The torque transmission couplings (108) having flexible linkages. As a result, the power section has tight tolerances for the clearance at the tips of the rotors because the motor units are relatively stiff. The flexing normally obtained by bending the rotor shaft (106) is accomplished and absorbed in the flexible linkages.
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Inventors:
RUSHTON GUY (GB)
Application Number:
PCT/GB2009/002797
Publication Date:
September 10, 2010
Filing Date:
December 02, 2009
Export Citation:
Assignee:
SCHLUMBERGER HOLDINGS
SCHLUMBERGER CA LTD (CA)
PRAD RES & DEV LTD
SCHLUMBERGER SERVICES PETROL (FR)
SCHLUMBERGER TECHNOLOGY BV (NL)
RUSHTON GUY (GB)
SCHLUMBERGER CA LTD (CA)
PRAD RES & DEV LTD
SCHLUMBERGER SERVICES PETROL (FR)
SCHLUMBERGER TECHNOLOGY BV (NL)
RUSHTON GUY (GB)
International Classes:
E21B4/02; F04C11/00
Foreign References:
| US4011917A | 1977-03-15 | |||
| US4585401A | 1986-04-29 | |||
| GB2084697A | 1982-04-15 | |||
| GB2080367A | 1982-02-03 |
Attorney, Agent or Firm:
STOOLE, Brian, D. (Enterprise RoadThe University of Southampton Science Par, Southampton SO16 7NS, GB)
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