초록 ▼

A simplified ballast system designed for a tension leg platform from which drilling and/or production activities are to be performed in a body of water provides for rapid deballasting via large capacity dump valve(s) and for ballasting for trim operations by use of an eductor at the bottom of a drai

A simplified ballast system designed for a tension leg platform from which drilling and/or production activities are to be performed in a body of water provides for rapid deballasting via large capacity dump valve(s) and for ballasting for trim operations by use of an eductor at the bottom of a drain well fluidly connected by drain lines to ballast compartments.

대표청구항 ▼

1. A hull for an offshore tension leg platform comprising a pontoon and vertical columns connected to said pontoon, said hull having a ballast system comprising:(A) a ballast compartment in said hull; (B) a drain well within a vertical column; (C) a drain line providing liquid-flow communication bet

1. A hull for an offshore tension leg platform comprising a pontoon and vertical columns connected to said pontoon, said hull having a ballast system comprising:(A) a ballast compartment in said hull; (B) a drain well within a vertical column; (C) a drain line providing liquid-flow communication between said drain well and said ballast compartment; (D) a valve in said drain line; and (E) a pump in the lower portion of said drain well for pumping liquid out of said drain well.