Patent ID: 8151887

Claim:
A lubricator valve assembly adapted for connection in a pipe string for use in a well, the assembly comprising: a tubular valve body having a bore formed longitudinally therethrough; a valve seat connected to the valve body and in communication with the bore, wherein the valve seat is located below a valve element relative to the top of the well, wherein the valve element is mounted in the bore and rotatable with respect to the valve seat between an open position opening the bore to fluid flow across the valve seat and a closed position blocking fluid flow at the valve seat thereby closing the bore; an operator in connection between the valve element and a hydraulic control system, the operator moving the valve element between the open position and the closed position in response to the hydraulic control system; and means for opening the valve element upon failure of the hydraulic system, wherein the opening means comprises: a pump-through piston having a first end connected to the operator and a second end in fluid communication with the bore on a first side of the valve element; and a counter piston having an end connected to the operator and a second end in fluid communication with the bore on a second side of the valve element opposite from the first side.