Wells – Processes – Producing the well
Reexamination Certificate
2005-10-12
2008-09-02
Gay, Jennifer H (Department: 3672)
Wells
Processes
Producing the well
C166S377000, C166S068500, C166S105000, C417S360000
Reexamination Certificate
active
07419007
ABSTRACT:
A pumping system10is provided for pumping fluid from a downhole well to the surface through a production tubing string well. A rotatable drive rod18extends from the surface to power the downhole pump, and includes a plurality of rod couplings. The downhole pump includes a pump stator22and a rotor24rotatable within the pump stator. A lifting member36provided at the upper end of the stator is engaged by a drive coupling34to retrieve the pump from the well. The lifting member has an internal shoulder44tapered radially inwardly and upwardly, such that a rod coupling engages the internal shoulder and passes through the lifting member as the rotor is pulled upward.
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Belcher Iain R.
Guidry, Jr. Michael J.
Kollatschny Jason Clay
Kruppa Scott Alan
Andrews David
Browning & Bushman P.C.
Gay Jennifer H
Robbins & Myers Energy Systems L.P.
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