Patent ID: 8834133
Filing Date: 2014-09-16
Classification: E21B,F04B,Y10S

Abstract:
1. A pumping device for pumping fluids located at the bottom of a drilled well, of the device comprising: a housing, having a hydraulic pump enclosure and a hydraulic motor enclosure; a hydraulic pump disposed within the housing; a hydraulic motor coupled to the pump; a driveshaft having an axis of rotation and extending from the hydraulic motor to the hydraulic pump, wherein the hydraulic motor is configured to rotate the driveshaft and drive the hydraulic pump; a rotating seal disposed about the driveshaft and configured to form a seal between the hydraulic motor and the hydraulic pump; wherein the rotating seal comprises two thrust members disposed about the driveshaft on opposite sides of a double tapering block disposed about the driveshaft, wherein each thrust member has a spherical head that engages the tapering block, wherein one of the thrust members is eccentrically oriented relative to the axis of rotation of the driveshaft, wherein the driveshaft extends through both thrust members and the tapering block; and wherein the hydraulic pump includes a fixed barrel disposed in the housing and a plurality of circumferentially-spaced pistons, wherein each piston slidingly engages a mating throughbore extending axially through the fixed barrel, and wherein the fixed barrel is rotationally fixed relative to the housing.