Method and device for excavating submerged stratum

Details Method and device for excavating submerged stratum Method and device for excavating submerged stratum

E - Fixed Constructions

21

B

E21B 7/14 (2006.01) B23K 26/00 (2006.01) B23K 26/12 (2006.01) B28D 1/00 (2006.01) E21C 37/18 (2006.01)

Patent

CA 2576756

A drilling method of a stratum capable of drilling a stratum such as an underground resource endowment layer in liquid by laser irradiation in liquid. A laser beam transmitted by a laser transmission means (20) is applied, as a laser beam having a wavelength exhibiting high absorptivity to liquid (90), from a laser induction bubble generating means (35) into the liquid (90) to generate a bubble flow (36) and a stratum existing in the liquid is drilled using a fracture action force induced by laser. On the other hand, a laser beam (41) exhibiting low absorptivity to the liquid (90) is applied from a laser irradiating means (39) and passed through the bubble flow (36) so that a thermal action force is applied to the stratum thus fracturing the rock and drilling the stratum. The fracture action force and thermal action force can be cooperated.

L'invention concerne un procédé de forage d'une strate capable de forer une strate comme une couche renfermant une ressource souterraine dans un liquide par irradiation laser dans le liquide. On applique un faisceau laser transmis par un moyen de transmission laser (20), sous forme de faisceau laser d'une longueur d'onde de forte capacité d'absorption par rapport au liquide (90), à partir d'un moyen générateur de bulles à induction laser (35) dans le liquide (90) pour générer un courant de bulles (36) et une strate existant dans le liquide est forée en utilisant une force de fracturation induite par laser. D'autre part, un faisceau laser (41) présentant une faible capacité d'absorption par rapport au liquide (90) est appliqué depuis un moyen d'irradiation laser (39) et passé à travers le courant de bulles (36) de manière à appliquer une force d'action thermique à la strate, pour ainsi fracturer la roche et forer la strate. La force de fracturation et la force d'action thermique peuvent être combinées.

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