Patent ID: 6086339
Filing Date: 2000-07-11
Classification: F04B,Y10T

Abstract:
A submersible pumping apparatus for use in a well, said apparatus comprising:a pumping housing having an inlet and an outlet;a plunger reciprocably disposed in said pumping housing;a prime mover having a rotating output shaft;a transmission connected to said plunger and said prime mover, said transmission adapted for converting rotating motion of said output shaft of said prime more into reciprocating motion of said plunger and a plunger rod interconnecting said transmission and said plunger;said plunger comprising:a plunger body defining a bore for receiving a portion of said plunger rod therein;a first plunger first ring disposed on said plunger body and adapted for sealing engagement with said pumping housing as said plunger moves upwardly;said first plunger ring said plunger body define a cavity therebetween;a second plunger ring disposed on said plunger body and adapted for sealing engagement with said pumping housing as said plunger moves downwardly; anda locking mechanism for locking said plunger body to said plunger rod;said locking mechanism comprising a nut threadingly engaged with said plunger rod, and a quantity of epoxy substantially filling said cavity and enclosing at least a portion of said nut.