External position indicator of ram blowout preventor

摘要

Method and blowout preventer for sealing a well. The blowout preventer includes a body having first (34) and second (36) chambers, the first chamber (34) extending substantially perpendicular to and intersecting the second chamber (36); a ram block (80) configured to move within the first chamber (34) to seal a first region of the second chamber (36) from a second region of the second chamber (36); a rod (78) connected to the ram block (80) and configured to extend along the first chamber (34); a piston (76) connected to the rod (78) and configured to move along and within the first chamber (34); a bonnet (60) configured to receive the piston (76), the bonnet (60) being detachably attached to the body; and an indicator device (62) partially mounted outside the bonnet (60) and configured to indicate a physical position of the ram block (80) within the body. c4 Nu ! Mcilo