Provided is an apparatus to separate a riser positioned in a connection portion of a riser wherein a drill pipe is inserted, and connected to a lower side of a drill ship. The apparatus to separate the riser comprises: a moving member receiving vertical lift force by a riser tensioner wherein the drill pipe penetrates; and a cutter contacting a moving member to rotate in accordance with a movement of the moving member.
SEPERATING APPARATUS FOR RISER OF DRILLSHIP AND METHOD THEREOF
2015-09-11
Patent
Electronic Resource
Korean
SEPERATING APPARATUS FOR RISER OF DRILLSHIP AND METHOD THEREOF
European Patent Office | 2015