Pumps – Motor driven – Including means for facilitating assembly or disassembly of...
Patent
1998-03-26
1999-11-23
Freay, Charles G.
Pumps
Motor driven
Including means for facilitating assembly or disassembly of...
4174242, 418 48, 166 98, F04B 3500
Patent
active
059889926
ABSTRACT:
A progressive cavity pump housing is secured to the lower end of a string of tubing. A motor is secured to the progressive cavity housing. An electrical power cable is strapped to the motor alongside the tubing. The pump has a pump rotor located within a stator. The pump rotor has a driven shaft extending downward from its lower end which mates with a drive shaft extending upward from the motor. When the pump reaches the motor, the driven shaft will stab into the drive shaft. The upper end of the pump rotor extends above the stator and is configured to engage an overshot retrieval tool. To retrieve the rotor, the operator lowers an overshot retrieval tool through the production tubing and latches it to the upper end of the pump rotor. The operator pulls the rotor out of the pump, thereby disengaging the rotor from the drive shaft of the motor, and leaving the remainder of the pump and the motor in place. After flushing the pump stator, the rotor may be lowered back through the tubing into the stator and reengaged to the drive shaft.
REFERENCES:
patent: 4706745 (1987-11-01), Bishop et al.
patent: 4877085 (1989-10-01), Pullig, Jr.
patent: 5510281 (1996-04-01), Round
patent: 5746582 (1998-05-01), Patterson
patent: 5765638 (1998-06-01), Taylor
Dillon David B.
Kanady Edward C.
Olson David L.
Tetzlaff Steven K.
Baker Hughes Incorporated
Bradley James E.
Freay Charles G.
Tyler Cheryl J.
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