Orienting whipstock seat, and method for seating a whipstock

Details Orienting whipstock seat, and method for seating a whipstock Orienting whipstock seat, and method for seating a whipstock

E - Fixed Constructions

21

B

E21B 7/06 (2006.01) E21B 7/08 (2006.01)

Patent

CA 2446947

The present invention provides an apparatus and methods for seating a whipstock. The apparatus comprises an expandable seat (10), or nipple, configured to receive a whipstock (30). The seat is run into a cased wellbore (40), and is set by expanding it into frictional contact with the inner surface of the casing. Thereafter, a whipstock is seated onto the seat. The seat includes a keyway (12) configured to receive an orientation member (38) extending from the whipstock. In this manner, the orientation of the seat can be determined. An orientation member of the whipstock can be adjusted to properly orient the face of the whipstock in the seat, and the whipstock lowered onto the seat so that it automatically seats in the proper direction. The whipstock then serves as a diverter tool for drilling a lateral wellbore such as a horizontal well.

L'invention concerne un appareil et des procédés de positionnement d'un biseau de déflexion. Ledit appareil comprend un siège extensible (10) ou un mamelon conçu pour loger un biseau de déflexion (30). Ledit siège est amené dans un puits de forage entubé (40) et est fixé par le biais de son expansion qui le fait entrer en contact frictionnel avec la surface interne du tubage. Puis, on place un biseau de déflexion sur le siège. Ce siège comprend un logement (12) conçu pour recevoir un élément d'orientation (38) s'étendant dudit biseau. Ainsi, on peut déterminer l'orientation du siège. On peut ajuster un élément d'orientation dudit biseau de manière à orienter convenablement la surface du biseau dans le siège, et on peut abaisser ledit biseau sur le siège, de telle manière qu'il se positionne automatiquement dans la direction adéquate. Ce biseau de déflexion sert d'outil partiteur destiné au forage d'un trou latéral, tel qu'un trou horizontal.

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