Title:
Two zone pumping
United States Patent 2910002
US Patent References:
2-zone pump
- - 2797642


Inventors:
Morgan, Forrest C.
Publication Date:
10/27/1959
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Assignee:
PHILLIPS PETROLEUM CO
Primary Class:
166/54.100
Other Classes:
166/105.500, 417/523, 417/529
International Classes:
E21B43/14; E21B43/00