High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
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United States of America Patent
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Feb 22, 2005
Grant Date -
Feb 20, 2003
app pub date -
Aug 15, 2002
filing date -
Aug 19, 2001
priority date (Note) -
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Abstract
The method of providing in excess of 60 kilowatts of electrical power to the electrical motor of a subterranean electric drilling machine through a substantially neutrally buoyant composite umbilical containing electrical conductors to reduce the frictional drag on the neutrally buoyant umbilical. Drilling and casing subterranean monobore wells are contemplated to distances of 20 miles from a wellsite. For drilling applications, the umbilical possesses a drilling fluid conduit. The umbilical also possesses high speed data communications such as a fiber optic cable or a coaxial cable that is used in the feedback control of the downhole electric drilling motor. Such umbilicals are also useful to provide power to remotely operated vehicles for subsea well servicing applications.
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