Methods and apparatus for thermal drilling

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

E - Fixed Constructions

21

B

E21B 7/14 (2006.01)

Patent

CA 2740055

Methods and apparatus (31) for spalling a material, for example to thermally drill a wellhole, are provided. Such methods may include directing a fluid having a temperature greater than about 500 °C above the ambient temperature of the material and less than about the temperature of the brittle-ductile transition temperature of the material to a target location on the surface of the material, wherein the fluid produces a heat flux of about 0.1 to about 50 MW/m** at an interface between the fluid and the target location, and thereby creating spalls of the material.

L'invention concerne des procédés et un dispositif pour scheider un matériau, par exemple pour forer thermiquement un trou de puits. Ces procédés peuvent comprendre la direction d'un fluide présentant une température supérieure d'environ 500ºC à la température ambiante du matériau, et inférieure à approximativement la température de transition fragile - ductile du matériau en un endroit cible sur la surface du matériau, dans lesquels le fluide produit un flux de chaleur d'environ 0,1 à environ 50 MW/m2 à une interface entre le fluide et l'endroit cible, et créant ainsi des éclats du matériau.

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