APPARATUS FOR CARRYING OUT UNDERWATER WELLHEAD OPERATIONS

摘要

Apparatus for carrying out underwater operations between a wellhead on the ocean bottom and a vessel floating on the water surface wherein the vessel is subject to wave motion. Interconnection means are suspended from the floating vessel adapted to operatively engage the wellhead to thereby provide fluid communication between the vessel and the wellhead. Hydro-pneumatically controlled wave motion cancelling means operatively engage the interconnection means to compensate for any wave motions acting on the vessel and thereby maintain the interconnection means in operative position.