MULTI-STAGE BLOWOUT PREVENTER AND METHOD OF USING THE SAME

摘要

A multi-stage blow out preventer comprises: a housing; a ram block carrier which moves inside the housing; and one or more ram blocks configured to be disposed inside the ram block carrier. The ram block carrier can comprise: an opening; an upper lathe inside the opening configured to maintain an upper ram block; and a lower lathe inside the opening configured to maintain a lower ram block. The housing can comprise: central bore; cavities on both side surfaces of the bore; and an opening allowing the ram block to access a pipe inside the bore.