E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/10 (2006.01)
Patent
CA 2632786
A method of constructing a borehole drilled with a drilling apparatus (16), the method comprises: connecting a flexible tubular liner sleeve (22) around the outside of the drilling apparatus and connecting the sleeve around an upper opening of the borehole so as to pass into the borehole; progressively extending the sleeve into the borehole as drilling progresses while maintaining connection to the drilling apparatus and borehole opening; at a predetermined point in the drilling, expanding the sleeve so as to contact the borehole wall; and setting the sleeve so as to be fixed to the borehole wall after expansion. Apparatus for use in such a method comprises: a flexible, expandable sleeve (22); a first connector for connecting the sleeve around the outside of a drilling assembly; and a second connector for connecting the sleeve around the opening of the borehole; wherein the sleeve is arranged to extend through the borehole between the connectors as drilling progresses.
L~invention concerne un procédé de construction d~un trou de forage foré au moyen d~un appareil de forage (16), le procédé comprenant les étapes consistant à : raccorder un manchon de garniture tubulaire souple (22) autour de l~extérieur de l~appareil de forage et raccorder le manchon autour d~une ouverture supérieure du trou de forage pour qu~il pénètre dans celui-ci ; enfoncer progressivement le manchon dans le trou de forage à mesure que le forage avance tout en maintenant le raccord avec l~appareil de forage et l~ouverture du trou de forage ; à un point prédéterminé du forage, dilater le manchon pour le mettre au contact de la paroi du trou de forage ; et immobiliser le manchon dilaté de façon à l~ancrer à la paroi du trou de forage. L~invention concerne également un appareil destiné à être utilisé par ce procédé, comprenant : un manchon souple dilatable (22) ; un premier raccord servant à raccorder la manchon autour de l~extérieur d~un ensemble de forage ; et un deuxième raccord servant à raccorder le manchon autour de l~ouverture du trou de forage, le manchon étant conçu pour s~enfoncer dans le trou de forage entre les raccords à mesure que le forage avance.
Bailey Louise
Cooper Iain
Guillot Dominique
Jeffryes Benjamin
Maitland Geoffrey
Schlumberger Canada Limited
Smart & Biggar
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