Methods and apparatus for mechanical and thermal drilling

Details Methods and apparatus for mechanical and thermal drilling Methods and apparatus for mechanical and thermal drilling

E - Fixed Constructions

21

B

E21B 7/14 (2006.01) E21B 7/18 (2006.01) E21B 10/00 (2006.01) E21B 10/60 (2006.01) E21B 41/00 (2006.01)

Patent

CA 2740052

Methods and apparatus for excavation of a borehole in a geological formation are provided. Such methods may include providing a thermal system (54) capable of providing substantially hot fluid, and comprising at least one jet nozzle, providing a mechanical drilling (55) system comprising a drill bit, directing the substantially hot fluid through the jet nozzle (49) towards the geological formation causing an altered portion of geological formation to form, and removing the altered portion using the drill bit, thereby creating cuttings and producing a borehole in the geological formation.

L'invention concerne des procédés et un dispositif d'excavation d'un trou de forage dans une formation géologique. Ces procédés peuvent comprendre l'installation d'un système thermique capable de fournir un fluide sensiblement chaud, et qui comprend au moins une tuyère d'éjection, l'installation d'un système de forage mécanique qui comprend un trépan de forage, qui dirige le fluide sensiblement chaud à travers la tuyère d'éjection en direction de la formation géologique, entraînant la formation d'une partie altérée de la formation géologique, et l'enlèvement de la partie altérée en utilisant le trépan de forage, créant ainsi des découpes et formant un trou de forage dans la formation géologique.

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