Drill stem for deep drillings

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/02 (2006.01) E21B 17/00 (2006.01)

Patent

CA 2544757

The invention relates to a drill stem (3) for deep drillings, comprising a plurality of drill pipes (10) having hollow drilling bodies (12) made of electrically conductive material and bushings (11) having bushing bodies (27) made of electrically conductive material. In order to obtain rapid and exact information from the drilling site, an electric pole is formed by the drill stem bodies consisting of the hollow drilling bodies (12) and the bushing bodies (27) and the other electric pole is formed by at least one conductor (7) which is electrically insulated with respect to the drill stem body and is arranged inside the drill stem body, thereby making it possible to transfer both energy and data.

L'invention concerne une tige de forage (3) destinée à des forages profonds et comprenant une pluralité de tubes de forage (10) présentant des corps de tube de forage (12) en matériau électroconducteur, ainsi qu'une pluralité de manchons (11) présentant des corps de manchon (27) en matériau électroconducteur. L'invention vise à obtenir, avec rapidité et précision, des informations provenant de l'emplacement de forage. A cet effet, un pôle électrique est formé par le corps de tige de forage constitué des corps de tube de forage (12) et des corps de manchon (27) et l'autre pôle électrique est formé par au moins un conducteur (7) isolé électriquement par rapport au corps de tige de forage et placé à l'intérieur du corps de tige de forage, de façon à rendre possible un transfert aussi bien d'énergie électrique que de données.

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