Patent ID: 7934376

Claim:
A pump device used in oil and gas wells for the hydraulic actuation of equipment, comprising: a piston/cylinder unit and an electrical drive device, movably connected to the piston of the piston/cylinder unit for at least intermittent pump movement, wherein the pump device is capable of pumping fluid from a fluid feed line to the equipment through a supply line; a pump valve located in the supply line and capable of controlling fluid flow from the pump to the equipment, wherein the pump valve is selectively lockable in an open position; a bypass line connecting the fluid feed line upstream of the pump device to the supply line downstream of the pump device and the pump valve; a bypass valve capable of controlling fluid flow from the feed line, through the bypass line, and to the equipment; wherein the bypass valve is selectively lockable in an open position such that fluid is able to be communicated from the fluid feed line to the equipment through the bypass line; wherein the pump and bypass valves are accessible for actuation by a remotely controlled vehicle via an access device for the vehicle for adjustment between the open and closed positions; and wherein the access device comprises a hydraulic connection or the feed of hydraulic fluid from the remotely controlled vehicle.