Patent ID: 8146732
Filing Date: 2012-04-03
Classification: E21B,F04B

Abstract:
1. A drive head assembly for a fluid conveyor system for extracting fluids from a well bore comprising: a frame is adjacent a standpipe extending from the well bore; a power delivery means removably connected to the frame, for rotation of a drive wheel; a set of synchronized follower wheels driven by the drive wheel; a set of shafts, comprising a first shaft and a second shaft, rotationally mounted to the frame; the set of follower wheels, further comprising a first follower wheel mounted on the first shaft and a second follower wheel mounted on the second shaft, wherein the first follower wheel rotates in a first direction and the second follower wheel rotates in a second direction; a first sheave, having a first perimeter and a first set of coaxial grooves around the first perimeter, mounted on the first shaft; a second sheave, having a second perimeter and a second set of coaxial grooves around the second perimeter, mounted on the second shaft; a third sheave, rotationally mounted in the well bore, having a third perimeter and a third set of coaxial grooves around the third perimeter; a conveyor, wound in a figure-8 path between the first sheave and the second sheave, contacting the first sheave in the first set of grooves and contacts the second sheave in the second set of grooves and the third sheave in the third set of grooves.