Method for righting jacket by using single cantilever gin pole and double hooks
A technology for jackets and poles, which is applied in construction and infrastructure engineering, etc., can solve the problems of increased jacket weight, increased project cost, increased expense and construction period, etc., to reduce installation weight, reduce requirements, and reduce project costs Effect
Active Publication Date: 2013-01-02
CHINA NAT OFFSHORE OIL CORP +1
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The invention provides a method for righting a jacket by using a single cantilever gin pole and double hooks, which utilizes a single cantilever gin pole of a floating crane ship to finish the righting operation of the jacket. The method comprises the fives steps that a transport barge laterally stops at the tail part of the floating crane ship, and a lifting rigging and a righting rigging are connected; a main hook of the floating crane ship is used to lift a jacket, and the transport barge is dragged away from the floating crane ship; the main hook of the floating crane ship is lowered so that a part of the jacket is immersed into sea water; a gin pole of the floating crane ship is lowered to a predetermined angle, and the jacket is rotated to the position parallel to the gin pole of the floating crane ship by using a tug boat; and righting of the jacket is finished by lowering the main hook of the floating crane ship and raising an auxiliary hook of the floating crane ship. According to the method, the single cantilever gin pole is utilized to finish the lifting and righting of large-sized jackets, the marine construction period can be shortened, the requirement for reserve buoyancy by the jacket is lowered, the mounting weight of the jacket is reduced, and the engineering cost is greatly reduced.
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