Patent ID: 7665529

Claim:
A lubricator valve for selectively closing off fluid flow within a production tubing string and for selectively passing a tool through the production tubing string, the lubricator valve comprising: a valve housing to be incorporated into a production tubing string; a first flapper valve within the housing having a first flapper member that is operable between open and closed positions to selectively close off fluid flow through the production tubing string; a second flapper valve within the housing having a second flapper member that is operable between open and closed positions to selectively close off fluid flow through the production tubing string; a flip-flap mechanism for selectively moving the first flapper member between the open and closed positions, the flip-flap mechanism comprising: an orientation sleeve that is disposed within the housing and rotationally moveable therewith in; and a flip-flap arm member extending between the orientation sleeve and the first flapper member, the arm mechanically moving the first flapper member to the closed position upon rotation of the orientation sleeve in a first direction and mechanically opening the first flapper member upon rotation of the orientation sleeve in a second direction that is opposite the first direction.