Methods and apparatus for thermal drilling

E - Fixed Constructions – 21 – B

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E21B 7/14 (2006.01) E21B 7/18 (2006.01) E21B 43/114 (2006.01)

Patent

CA 2740048

Methods and apparatus for spalling a geological formation, for example to thermally drill a wellhole, are provided. Such methods may include providing a housing comprising a reaction chamber and a catalyst element (25) held within the reac-tion chamber, providing at least one jet nozzle (27, 29), contacting one or more unreacted fluids or solids with the catalyst ele-ment, wherein the unreacted fluid or solid is adapted to react over the catalyst element, thus generating a reacted fluid, and emit-ting the reacted fluid through the at least one nozzle, wherein the at least one nozzle is directed to an excavation site within or on the geological rock formation, thereby creating spalls and/or a reacted rock region.

L'invention concerne des procédés et un dispositif de scheidage d'une formation géologique, par exemple pour forer thermiquement un trou de puits. Ces procédés peuvent comprendre la mise en place d'un boîtier qui comprend une chambre de réaction et un élément catalyseur contenu à l'intérieur de la chambre de réaction, l'installation d'au moins une tuyère d'éjection, la mise en contact d'un ou de plusieurs fluide(s) ou solide(s) inaltéré(s) avec l'élément catalyseur, dans lesquels le fluide ou le solide inaltéré est adapté pour réagir avec l'élément catalyseur, générant ainsi un fluide altéré, et émettant le fluide altéré à travers ladite tuyère, dans lequel ladite tuyère est dirigée vers un site d'excavation à l'intérieur de ou sur la formation rocheuse géologique, créant ainsi des éclats et/ou une région rocheuse altérée.

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