Method of creating a wellbore in an underground formation

Details Method of creating a wellbore in an underground formation Method of creating a wellbore in an underground formation

E - Fixed Constructions

21

B

E21B 43/10 (2006.01) E21B 7/20 (2006.01) E21B 17/20 (2006.01) E21B 29/10 (2006.01) E21B 33/14 (2006.01)

Patent

CA 2365966

A method of creating a wellbore in an underground formation comprising drilling a borehole in the underground formation using a drilling tubular, capable of being expanded, to which a downhole motor driving a drill bit has been connected, and, after drilling to the desired casing setting depth, expanding the drilling tubular into place to line the borehole by applying a radial load to the drilling tubular and removing said load from the drilling tubular. A sealing material in a fluidic state is preferably pumped between the drilling tubular and the wellbore wall prior to applying said radial load to the drilling tubular which sealing material sets after the radial expansion.

L'invention concerne un procédé permettant de creuser un puits de forage dans un formation souterraine. Ce procédé consiste à creuser un trou de forage dans ladite formation souterraine au moyen d'une structure tubulaire de forage pouvant être dilatée, à laquelle on connecte un moteur de fond de puits actionnant un outil de forage. Après avoir creusé jusqu'à la profondeur de tubage souhaitée, on dilate la structure tubulaire en place pour chemiser le trou de forage en appliquant une charge radiale sur la structure tubulaire de forage, puis en supprimant ladite charge de la structure tubulaire de forage. On introduit de préférence par pompage un matériau de scellement dans un état fluidique entre la structure tubulaire de forage et la paroi du puits de forage avant d'appliquer ladite charge radiale sur la structure tubulaire de forage, ledit matériau de scellement durcissant après la dilatation radiale.

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