PUMPING DEVICE
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United States of America Patent
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Issued Date -
Oct 8, 2015
app pub date -
Apr 2, 2015
filing date -
Apr 3, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A fluid pumping device for placing inside a casing extending into a drilling well in order to pump a fluid present in a lower zone of the casing and delivering it to an upper zone of the casing. The fluid pumping device comprises an assembly of cylindrical elements placed end to end, the cylindrical elements of this assembly comprising:
- a seal to cooperate with the casing to ensure a tight seal between the lower zone and the upper zone;a hydraulic pump;an electric motor for driving the hydraulic pump, lubricated by a hydraulic fluid; anda compensator to balance the pressure of the hydraulic fluid lubricating the electric motor with the pressure of the fluid in the lower zone of the casing.
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