Patent ID: 9080436
Filing Date: 2015-07-14
Classification: E21B

Abstract:
1. A method of installing a subterranean pumping system comprising: a. providing a lower pump and an upper pump of the pumping system, the lower pump having at an upper end a central lower pump bore coaxial with an axis of the pumping system, and an annular upward facing shoulder surrounding the lower pump bore, the upper pump having on a lower end a central upper pump bore coaxial with the axis and an annular downward facing shoulder surrounding the central upper pump bore, each of the pumps having a drive shaft located on the axis, each of the drive shafts having a splined end, and an internally splined coupling sleeve carried on one of the splined ends for receiving the other of the splined ends; b. mounting at least one cylindrical guide pin to one of the shoulders and forming at least one guide hole in the other of the shoulders, the guide hole having a circumferentially tapered entrance portion leading to a longitudinally extending portion, the entrance portion extending circumferentially a distance greater than a cross section of the longitudinally extending portion; c. the anchoring the lower pump within production tubing disposed in a subterranean well; then d. lowering the upper pump down the production tubing onto the lower pump, inserting the pin into the entrance portion of the guide hole, and sliding the pin along the entrance portion and into the longitudinally extending portion of the guide hole, causing an increment of rotation of the upper pump relative to the lower pump; and e. while performing step (d), stabbing the other of said splined ends into the internally splined coupling.