Patent ID: 6095241
Filing Date: 2000-08-01
Classification: E21B,F04D

Abstract:
A device for connection to a wellhead for coupling a drive assembly for a downhole pump with an apparatus having a rotatable member for driving the apparatus, the drive assembly comprising a rod string suspended in the wellhead and wherein the drive assembly drives the downhole pump, the device comprising:(a) a rotatable first shaft having a first end, a second end and a longitudinal axis extending therebetween, wherein the first shaft is associated with the drive assembly such that the first shaft is rotated thereby;(b) a rotatable connector for connecting the first shaft with the rotatable member of the apparatus such that rotation of the first shaft rotates the connector and drives the apparatus, the connector comprising a driven end for connecting with the first end of the first shaft and a drive end for connecting with the rotatable member of the apparatus; and(c) a rotatable coupler having a driven end, a drive end and a longitudinal axis extending therebetween for connecting the first shaft with the connector, wherein the driven end of the coupler is connected with the first end of the first shaft, wherein the drive end of the coupler is connected with the driven end of the connector, wherein the longitudinal axis of the first shaft is substantially coaxial with the longitudinal axis of the coupler such that the driven end of the connector rotates substantially coaxially with the first shaft and wherein the coupler is mounted about at least one of the first end of the first shaft and the driven end of the connector such that at least one of the first end of the first shaft and the driven end of the connector is contained therein.