Patent ID: 7874368
Filing Date: 2011-01-25
Classification: E21B

Abstract:
1. A progressive cavity pump system comprising: a tubing string disposed within a borehole, the tubing string having a longitudinal axis and including a seating nipple disposed at a predetermined depth in the tubing string; a stator positioned within the tubing string, wherein the stator includes a radially outer housing having an upper end and a lower end, a radially inner liner having a helical-shaped inner surface, and a seating mandrel coupled to the upper end of the housing; a seal element disposed about the seating mandrel, wherein the seal element forms a static seal with the inner surface of the seating nipple; a delivery/retrieval tool coupled to a lower end of a rod string, wherein an upper end of the seating mandrel of the stator includes a coupling member adapted to releasably couple to the delivery/retrieval tool; and wherein the delivery/retrieval tool has a first position in the tubing string coupled to the seating mandrel of the stator and a second position in the tubing string separated from and axially spaced above the seating mandrel.