Control of concentric tubing direction

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/20 (2006.01) A61K 31/4439 (2006.01) E21B 17/08 (2006.01) E21B 19/22 (2006.01) A61P 25/00 (2006.01)

Patent

CA 2758253

An apparatus and a method to control rotational positioning of continuous concentric tubing that extends from a surface downhole in a subterranean well or bore. In one version, a continuous cylindrical inner tube resides within and is concentric with a cylindrical outer tube. At least one elliptical lobe extends from the continuous inner tube. The invention utilizes diameter restrictions within and attached to the outer concentric tubing so that the elliptical lobe or lobes engage the diameter restrictions. Accordingly, rotation of one tube rotates or orients the other tube.

L'invention concerne un appareil et un procédé de commande du positionnement en rotation d'une colonne de production concentrique continue qui s'étend d'une surface de trou de forage dans un puits ou trou souterrain. Dans une version, un tube intérieur cylindrique continu se trouve dans un tube extérieur cylindrique et est concentrique avec celui-ci. Au moins un lobe elliptique s'étend du tube intérieur continu. L'invention utilise des éléments de limitation de diamètre dans la colonne de production concentrique extérieure et attachés à celle-ci de sorte que le lobe ou les lobes elliptiques viennent en prise avec les éléments de limitation de diamètre. Par conséquent, la rotation d'un tube fait tourner ou oriente l'autre tube.

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