Title: Method and apparatus for flooding of oil-bearing formations by downward inter-zone pumping

Abstract: Sub-surface water is pumped through a bore hole to an oil-bearing formation by a pump installation in the bore hole including a submergible pump and an adjustable control valve at the discharge side of the pump. The control valve closes automatically when the pump is not operating to prevent reverse flow and loss of flooding pressure and to insure a back pressure on the pump during starting, and is controlled hydraulically from the surface of the earth to vary the flow to the oil-bearing formation. A novel control valve structure provides accurate and reliable control without unduly restricting the flow volume.

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Inventors: Zehren, James N. (Bartlesville, OK, US)

Application Number: 616319
Filing Date: 1975-09-24
Publication_date: 1977-03-01
Assignee: TRW, Incorporated (Cleveland, OH)
Primary Class(es): 166/250.15 137/522, 137/529, 166/68, 166/106, 166/268, 166/305.1, 166/321
Other Classes:
US Patent Ref:

2352834	Jul, 1944	Hassler	166/269.
2375810	May, 1945	Nelson	137/522.
2742054	Apr, 1956	Poundstone	137/522.
2771091	Nov, 1956	Baker et al.	166/224.
2808111	Oct, 1967	Krueger	166/306.
3084898	Apr, 1963	Miller	166/224.
3428071	Feb, 1969	Kobnick	137/522.
3435844	Apr, 1969	Stelzer	137/522.
3454085	Jul, 1969	Bostock	166/306.
3631887	Jan, 1972	Fellbach et al.	137/522.

Other Refs:
Primary Examiner: Novosad, Stephen J.
Assistant Examiner:
Attorney: Shapiro and Shapiro