Apparatus and methods for drilling a wellbore using casing

E - Fixed Constructions – 21 – B

Patent

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E21B 7/20 (2006.01) E21B 7/06 (2006.01) E21B 7/08 (2006.01) E21B 7/18 (2006.01) E21B 21/10 (2006.01) E21B 33/14 (2006.01) E21B 41/00 (2006.01) E21B 47/01 (2006.01) E21B 34/00 (2006.01)

Patent

CA 2512641

Apparatus and methods for drilling with casing. In a first embodiment, a method for drilling with two concentric casing is disclosed. In a second embodiment, methods and apparatus for deflecting casing using a diverter apparatus are disclosed. In another embodiment, the apparatus comprises a motor operating system disposed in a motor system housing, a shaft operatively connected to the motor operating system, the shaft having a passageway, and a divert assembly disposed to direct fluid flow selectively to the motor operating system and the passageway in the shaft. In another aspect, methods and apparatus for directionally drilling a casing into the formation are disclosed. Methods and apparatus for measuring the trajectory of a wellbore while directionally drilling a casing into the formation are also described.

L'invention concerne un appareil et des procédés permettant de forer un puits utilisant un cuvelage. Dans un mode de réalisation, l'invention concerne des procédés et un appareil permettant de dévier un cuvelage au moyen d'un appareil déflecteur. Dans un autre mode de réalisation, ledit appareil comprend un système de moteur disposé dans un logement, un arbre connecté de manière fonctionnelle audit système de moteur, cet arbre comprenant un passage, et un ensemble de déflexion disposé afin d'orienter un écoulement fluidique de manière sélective vers le système de moteur et le passage de l'arbre. Dans un dernier mode de réalisation, l'invention concerne des procédés et un appareil permettant d'effectuer un forage directionnel afin de placer un cuvelage dans une formation. L'invention concerne, en outre, des procédés et un appareil permettant de mesurer la trajectoire d'un puits tout en effectuant un forage directionnel afin de placer un cuvelage dans ladite formation.

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