Patent ID: 6857472
Filing Date: 2005-02-22
Classification: E21B,F04D

Abstract:
1. A well pump device for use in connection with the recovery of hydrocarbons comprising: a pump device including a fluid inlet and a fluid outlet, wherein the pump device is adapted to intake fluid through the fluid inlet and to output fluid through the fluid outlet; a seal assembly adapted to interface with an interior surface of a well pipe to from a seal between the well pipe and the seal assembly such that the pump device may move through the well pipe while the seal assembly interfaces with the interior surface of the well pipe, wherein the fluid inlet is located on a first side of the seal assembly and the fluid outlet is located on a second side of the seal assembly; and a valve that alternately: the well pump device is adapted to be moved through the well pipe by the pressure difference when the valve has removed the fluid inlet from fluid communication with the fluid outlet and adapted to pump fluid from the fluid inlet out the fluid outlet when the valve has placed the fluid inlet in fluid communication with the fluid outlet.