E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/27
E21B 43/18 (2006.01) E21B 41/02 (2006.01) E21B 43/12 (2006.01)
Patent
CA 2031031
ABSTRACT OF THE DISCLOSURE The present invention relates to a system for improving the production of crude oil for underground reservoirs by the injection of treatment fluids. The system includes a subsurface oil pump for pumping oil from the reservoir to the surface and includes a metering mechanism for selectively introducing treatment fluids into the pumping chamber during oil recovery. A specific feature of the present invention is the provision of a seating nipple for sealingly receiving the pump within the production tube of the well. In accordance with a particular feature of the present invention, a metering valve is incorporated within the pump barrel thereby allowing the pump barrel and metering valve to be removed from the production tube as a unit for easy replacement and repair thereof. Furthermore, by selecting differently designed connecting adaptors, both insert type and tubing type subsurface pumps can be used with the metering valve assembly.
Intevep S.a.
Swabey Ogilvy Renault
LandOfFree
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