High power umbilicals for subterranean electric drilling...

E - Fixed Constructions – 21 – B

Patent

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E21B 4/04 (2006.01) E21B 4/18 (2006.01) E21B 7/06 (2006.01) E21B 17/20 (2006.01) E21B 21/10 (2006.01) E21B 33/124 (2006.01) E21B 33/126 (2006.01) E21B 43/10 (2006.01) E21B 47/12 (2006.01) E21B 23/00 (2006.01)

Patent

CA 2454865

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.

Procédé permettant de fournir un excédent de 60 kilowatts de puissance électrique au moteur électrique d'une machine de forage souterrain par un ombilical composite qui contient des conducteurs électriques et flotte de manière sensiblement neutre afin de réduire la résistance de frottement. L'ombilical permet le forage et le tubage de puits souterrains à un seul trou situés à une distance pouvant atteindre 20 miles d'un emplacement de forage. Pour des applications de forage, l'ombilical est équipé d'une conduite de fluide de forage. L'ombilical comporte également des systèmes de transmission de données grande vitesse, p. ex. câble à fibre optique ou câble coaxial, pour la commande à rétroaction du moteur électrique de forage de fond. Ces ombilicaux servent également à alimenter en énergie des véhicules télécommandés pour des applications d'entretien de puits sous-marins.

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