Deepwater Drilling and Production Articulated Column: Water Depths of 1,150 ft

Abstract

A. Figenschou, Articulated Column Norway A/S w IW130Summary. An articulated tower for drilling and production in the Norwegian Sea in water depths of L,150 ft [350 m] is presented. The main features are production trees it the deck level; a 19,000-ton [17 OOO-Mg]deck payload; limited motions; a steel structure, including main float and latiice; low-stressed mechanical articidation with antitorque device; and controlled bcndlng risers. This extensive study has considered in detail the behavior in extreme condkions, the fatigue of mtin WTIMLWII parts and risers, operating procedures, fabrication, and installation. Generaf results are given concerning behavior, structural design, articulation, bending riser, fabrication, and installation. A fabrication and installation schedule is also given.