Downhole pumping system
OwnerPhilip HEADinventor
Life of this patent
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Abstract
A downhole motor and pump assembly for use in a tube has a support that suspends the assembly downhole, a housing capable of forming a seal against an inside surface of the tube to divide the tube into a lower region below the seal and an upper region above the seal, an electric motor, and a power supply for the electric motor. A hydraulic pump driven by the electric motor has a high pressure output. A piston is operated by a directional valve such that the high pressure output from the hydraulic pump is directed by the directional valve alternately above and below the piston so as to reciprocate the piston. A fluid pump driven by the piston pumps well fluid from the lower region to the upper region.
Claims8
A downhole motor and pump assembly for use in a tube, the assembly comprising
- support means for suspending the assembly downhole,
- a housing capable of forming a seal against an inside surface of the tube to divide the tube into a lower region below the seal and an upper region above the seal,
- an electric motor,
- power means for supplying the electric motor,
- a hydraulic pump driven by the electric motor and having a high pressure output,
- a piston operated by a directional valve such that the high pressure output from the hydraulic pump is directed by the directional valve alternately above and below the piston so as to reciprocate the piston, and
- a fluid pump driven by the piston for pumping well fluid from the lower region to the upper region.
Dependencies are inferred from the claim text.