E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/27
E21B 43/12 (2006.01) F04D 9/00 (2006.01) F04D 13/10 (2006.01)
Patent
CA 1168574
IMPROVED ANTI-GAS LOCKING APPARATUS Abstract of the Disclosure An anti-gas locking apparatus for a downhole pump com- prises a sleeve disposed below the pump and in fluid communi- cation with the pump inlet, a housing disposed about the sleeve and fluidly communicating at its upper end with the well in which the pump is disposed, and a cross-over assembly communicating lower portions of the housing with the lower end of the sleeve. The cross-over assembly comprises a cross- over diffuser including a jacket member, the upper end of which mates with the lower end of the sleeve, and a dome mem- ber within the jacket member. Apertures are formed through the jacket member and ome member and webs extend between these members to form inlet passages into the interior of the dome member from the annulus between the housing and the sleeve and outlet passages about the dome member to the sleeve. An impeller is disposed within the jacket member be- low the dome member. Disclosed is an improved geometry of the cross-over diffuser in which webs forming the walls of the inlet and outlet passage spiral about the dome member with ever increasing vertical slope to a substantially verti- cal disposition and the diffuser is provided with similarly shaped flow shaping vanes within the outlet passages. The impeller is provided with vanes that increase in vertical dimension from the center of the impeller toward the periphe- ry thereof so that, with the improved geometry of the dif- fuser, turbulence of well fluids passing through the diffuser is avoided to prevent evolution of gases in the diffuser.
420066
Dresser Industries Inc.
Macrae & Co.
LandOfFree
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