Patent ID: 8770298

Claim:
A blowout preventer (BOP) stack for sealing an undersea well, comprising: a frame extending along an axis and configured to be attached to a head of the well; an accumulator attached to the frame and configured to provide high pressure; two or more BOPs attached to the frame, the two or more BOPs being disposed within the frame and attached one on top of the other along the axis; each BOP having a body and a pair of bonnets attached to the body, wherein the bonnets comprise cylindrical extensions protruding laterally from the body and configured to be detachably attached to the body, the body of one of the BOPs having a rectangular upper section defining four corners, and an upward facing shoulder at each of the corners; each BOP being configured to seal the well when the high pressure from the accumulator is released to the BOPs; a plurality of brackets, each of the brackets being attached to one of the upward facing shoulders of the body of said one of the BOPs, each of the brackets extending outward past the upward facing shoulder on which it is mounted; and a safety bar attached to the plurality of brackets and configured to surround the axis, the safety bar being located outboard of the rectangular upper section of the body of said one of the BOPs, and the safety bar having side portions extending over the bonnets of said one of the BOPs; and the safety bar being configured to slidingly receive a personnel safety harness fastener.