F - Mech Eng,Light,Heat,Weapons – 01 – C
Patent
F - Mech Eng,Light,Heat,Weapons
01
C
F01C 1/344 (2006.01) E21B 4/02 (2006.01) E21B 43/00 (2006.01) E21B 43/12 (2006.01) F01C 11/00 (2006.01) F04C 2/344 (2006.01)
Patent
CA 2153144
A roller vane motor for downhole drilling comprises a housing (1) and a rotor (3). The housing contains outlet ports (7) and wing deflector cams (2) that divide the space between housing and rotor into chambers (6a, b). The rotor is equipped with cylindrical rollers (5) in recesses (4), which rollers can move between an extended and a retracted position. Part of the drilling mud that flows through a central conduit (10) in the rotor, passes through inlet ports (9) and the recesses into chamber-parts (6a) and pushes rollers (51) into their extended position and in a clockwise direction, making the rotor turn, whilst drilling mud of lower pressure is pushed from the corresponding chamber-parts (6b) through the outlet ports (7) into the annulus (8) between the motor and the borehole wall. When the rollers (51) reach the wing deflector cams (2) they are forced into the retracted position, their tasks being taken over by rollers (5).
Riches Mckenzie & Herbert Llp
Ultidrill B.v.
LandOfFree
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