MOBILE OFFSHORE DRILLING UNIT

摘要

A mobile offshore drilling unit is described that has an operating deck supported on a submersible deck, which may be a pontoon deck or a mat deck, by four or more columns, wherein a ratio of displacement of the mobile offshore drilling unit to total column cross-sectional area is at least about 40 mT/m2 during operation. The submersible deck has a recess at each end with a thruster group disposed in each recess. The thrusters of the thruster group are displaced in a longitudinal direction and a transverse direction from each other.

主权项

1. A mobile offshore drilling unit, comprising:
an operating deck supported on a submersible deck by four or more columns having a total cross-sectional area, wherein a ratio of displacement of the mobile offshore drilling unit to total column cross-sectional area is at least about 40 mT/m2 during operation.