Wells – With below and above ground modification – Eduction pump or plunger in well
Reexamination Certificate
2006-05-09
2006-05-09
Thompson, Kenneth (Department: 3672)
Wells
With below and above ground modification
Eduction pump or plunger in well
C166S105000, C166S313000, C418S048000
Reexamination Certificate
active
07040392
ABSTRACT:
A progressive cavity pump pumps liquid downhole to a lower formation past a packer set in a casing of a wellbore. The rotor of the pump is axially restrained by a bearing assembly spaced below the pump for controlling uphole reactive loading on the rotor. Preferably the rotor is releasably coupled to the bearing assembly for release and recovery of the rotor from the bearing assembly. Such a releasable coupling is a latch comprising a plunger telescopically and releasably coupled with a housing using a dog and track arrangement, the dog and track utilizing the telescoping action to actuate the coupling and releasing of the latch.
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