Directional drilling with downhole motor on coiled tubing

Details Directional drilling with downhole motor on coiled tubing Directional drilling with downhole motor on coiled tubing

E - Fixed Constructions

21

B

E21B 7/06 (2006.01) E21B 23/04 (2006.01)

Patent

CA 2096820

A downhole adjustable orienting sub is included in a directional drilling tool string that is run into the borehole on coiled tubing. The bent housing of the tool string defines a bend angle and a bend point, and the bend point is oriented about the center of the bore by operating the orienting sub. The level of the reactive torque applied to the bent housing as the bit drills on bottom is controlled by selecting the amount of the weight of the coiled tubing that is applied to the bit. The orienting sub can be indexed downhole to provide different orientations of the bend point by temporarily reducing and then increasing the mud flow rate.

Raccord double femelle d'orientation réglable compris dans un train d'outils de forage directionnel qui est descendu dans le puits sur un tube d'intervention enroulé. Le logement courbé du train d'outils définit un angle de courbure et un point de courbure, et le point de courbure est dirigé vers le centre du puits en actionnant le raccord double femelle d'orientation. Le niveau de couple réactif appliqué au logement courbé au moment où l'outil fore au fond est réglé en choisissant le poids de tube d'intervention enroulé qui est appliqué sur l'outil. Le raccord double femelle d'orientation peut être indexé au fond afin d'obtenir diverses orientations du point de courbure en réduisant temporairement et en augmentant ensuite le débit de boue de forage.

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