Wells – With eduction pump or plunger – With packer or plug
Patent
1995-06-02
1998-01-27
Neuder, William P.
Wells
With eduction pump or plunger
With packer or plug
4174233, E21B 4338
Patent
active
057113718
ABSTRACT:
A down hole submersible pump is attached to the lower end of a tubing string extending to the earth's surface, the pump having a tubular casing connected to the tubing string. A cylinder is rotatably positioned concentrically within the pump casing, the cylinder having an external cylindrical surface in close proximity to the casing internal cylindrical surface and having a spiraled groove formed in the external cylindrical surface. A motor has a drive shaft connected concentrically to the cylinder by which the cylinder is rotated. A fluid inlet is provided between the motor and the cylinder lower end. Fluid is moved by the rotation of the cylinder through the spiral groove formed therein to above the cylinder and thence to the earth's surface through the tubing string.
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