US Patent 8353338 Well bore control valve

The well bore control valve comprises a housing (12) defining a throughbore (14), the throughbore adapted to receive a first tubular. The valve further comprises first (18) and second gates (20) located within the housing, the gates being movable in different directions transverse to the throughbore between the throughbore open position and the throughbore closed position. Movement of the gates from the throughbore open position to the throughbore closed position, in use, shares a tubular located between the gates. The valve also comprises a first seal seat (22) performing a seal of one of the gates in the throughbore closed position to seal the throughbore. In one embodiment, the gates are axially movable with respect to the throughbore.