The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2008
Filed:
Oct. 12, 2005
Iain R. Belcher, Houston, TX (US);
Michael J. Guidry, Jr., Hockley, TX (US);
Scott Alan Kruppa, Conroe, TX (US);
Jason Clay Kollatschny, The Woodlands, TX (US);
Iain R. Belcher, Houston, TX (US);
Michael J. Guidry, Jr., Hockley, TX (US);
Scott Alan Kruppa, Conroe, TX (US);
Jason Clay Kollatschny, The Woodlands, TX (US);
Robbins & Myers Energy Systems, L.P., Willis, TX (US);
Abstract
A pumping systemis provided for pumping fluid from a downhole well to the surface through a production tubing string well. A rotatable drive rodextends from the surface to power the downhole pump, and includes a plurality of rod couplings. The downhole pump includes a pump statorand a rotorrotatable within the pump stator. A lifting memberprovided at the upper end of the stator is engaged by a drive couplingto retrieve the pump from the well. The lifting member has an internal shouldertapered 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.