SUSTAINED SEA-BED UNIT AND METHOD TO PROVIDE A SHALLOW WATER DRILLING TERMINAL

摘要

Several embodiments relate to a method and a seabed-supported base structure for providing a shallow-water drilling terminal where a prefabricated floating seabed substructure is towed to the site, ballasted to rest on the seabed and / or fixed to the seabed forming a seabed foundation. the seabed-supported base frame is provided with at least one cantilever unit with well-drilling openings projecting laterally outwardly from the outside of a vertical wall terminated above sea level. a prefabricated floating piercing module provided with a stabilizer with side movable piercing device is towed into place, guided to the seabed substructure through an opening in the wall frame at the periphery of the base frame, weighted and coupled to the frame. wells are drilled from a drilling rig. Upon completion of drilling and well operation, the drilling unit is removed and replaced with a production unit.