E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/12 (2006.01) E21B 17/02 (2006.01) E21B 34/14 (2006.01) E21B 43/38 (2006.01) F04B 47/06 (2006.01) F04C 2/08 (2006.01) F04C 2/107 (2006.01) F04C 11/00 (2006.01) F04C 13/00 (2006.01) F04D 3/02 (2006.01) F04D 29/70 (2006.01)
Patent
CA 2244593
A rotary pump coupling device is used for flushing dual rotary screw pumps. The device is in the form of a tubular housing having a first set of apertures and a pair of subs for connecting the device to the stators of upper and lower pumps of an oil production string. Within the housing is a sleeve having a second set of apertures. The sleeve is slidable between an open position when the first and second set of apertures communicate and a closed position when the first and second set of apertures do not communicate. Fingers extend from a top and bottom end of the sleeve. Protrusions extending radially outward from the fingers are received in respective upper and lower annular recesses along an inner face of the housing in open or closed positions. Camming faces on the protrusions disengage the protrusions from the upper and lower recesses when the sleeve is displaced from the open or closed positions. A collar mounted on a drive shaft connecting the upper and lower pumps engages shoulders on an inner face of the sleeve for displacing the sleeve between open or closed positions.
Battison Williams Dupuis
Carriere Kent J.
LandOfFree
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