| 摘要 |
<p>The method of providing in excess of (60) kilowatts of electrical power to the electrical motor (114) of a subterranean electric drilling machine through a substantially neutrally buoyant composite umbilical containing electrical conductors (116) to reduce the frictional drag on the neutrally buoyant umbilical. Drilling and casing subterranean monobore wells (104) 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 vehicles for subsea well servicing applications.</p> |
