Method and apparatus for determining drilling paths to...

Details Method and apparatus for determining drilling paths to... Method and apparatus for determining drilling paths to...

E - Fixed Constructions

21

B

E21B 44/00 (2006.01) E21B 7/04 (2006.01)

Patent

CA 2448134

A method and apparatus for recomputing an optimum path (C) between a present location of a drill bit (D) and a direction or horizontal target (T) uses linear approximations of circular arc paths. The technique does not attempt to return to a preplanned drilling profile when there actual drilling results deviate from the preplanned profile. By recomputing an optimum path (C), the borehole to the target (T) has a reduced tortuosity.

La présente invention concerne un procédé et un appareil permettant de recalculer un trajet optimum entre la localisation courante d'un trépan et une direction ou une cible horizontale, par utilisation d'approximations linéaires de trajets d'arc de cercle. Cette technique n'essaye pas de retourner à un profil de forage planifié préalablement lorsque les résultats de forage réels s'écartent de ce profil planifié. Par ce nouveau calcul de trajet optimum, le trou de forage rejoignant la cible est moins tortueux.

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