E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/00 (2006.01) E21B 43/12 (2006.01) E21B 47/04 (2006.01) F04B 47/06 (2006.01) F04B 49/06 (2006.01)
Patent
CA 2452473
An oil well pumping system includes a small positive displacement pump below the fluid interface in a low volume oil well which pumps at a rate to maintain approximately constant fluid level in the well. The system includes at least a pair of sensors in a sensor array that is positioned above the pump and near the fluid interface to unambiguously determine liquid level. By maintaining the pumping rate of the positive displacement pump below that required to lower the liquid level to the pump, the pump will not unload and pump power requirements are reduced to a nearly constant low rate. In addition, the pump off control function is accomplished by a microprocessor which is mounted adjacent to the downhole sensor array. This location allows simple direct control of the downhole electric motor and eliminates the requirement that a control element be placed on the surface far from the pump.
Collette Herman D.
Itty Bitty Pump Co.
Ledgley Law
LandOfFree
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