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US 8,770,318 B2Granted
Drilling motor with a locking collet sleeve stabilizer
AssigneeNational Oilwell Varco, L.P.
InventorsPeter Shwets, Nazeeh Melhem
Life of this patent
Estimating the term…
Abstract
A threaded sleeve stabilizer spans an upper stator connection in a mud driven drilling motor used for borehole drilling. A number of collets are loaded in compression between the stator and the housing of the motor, and are held in compression by a threaded connection.
Claims24
A locking sleeve stabilizer for a connection between a stator of a downhole drilling motor and a housing of an adjacent sub, the locking sleeve stabilizer comprising:
- a threaded sleeve comprising a locking sleeve and a stabilizer sleeve, the locking sleeve positionable about the stator, the stabilizer sleeve threadedly connected to the housing, the stabilizer sleeve threadedly connectable to the locking sleeve;
- and
- a plurality of collets arrangeable in a generally cylindrical ring and loadable into compression by the threaded sleeve to lock the stator of the drilling motor to the housing, providing stiffness of the connection between the stator and the housing.
A downhole motor adapted for drilling boreholes into the earth comprising:
- a stator;
- and
- a compression loaded retention device operatively connectable to the stator and an adjacent sub to support a connection therebetween, the retention device comprising:
- a threaded connection comprising a locking sleeve and a stabilizer sleeve, the locking sleeve positionable about the stator of the drilling motor, the stabilizer sleeve threadedly connected to a housing of the adjacent sub, the stabilizer sleeve threadedly connectable to the locking sleeve;
- and
- a plurality of separate collets that are loaded in compression between the stator and the housing of the adjacent sub, and are held in compression by the threaded connection wherein the plurality of separate collets maintain the compressive loading thereof at an end of the motor.
3 more elements
Dependencies are inferred from the claim text.