Earth boring apparatus and method employing high powered laser

Details Earth boring apparatus and method employing high powered laser Earth boring apparatus and method employing high powered laser

B - Operations, Transporting

26

F

255/10

B26F 3/16 (2006.01) E21B 7/14 (2006.01)

Patent

CA 1053219

ABSTRACT Earth boring apparatus is mounted above ground and directs an annulus of high powered laser energy downwardly for boring a cylindrical hole by fusing successive annular regions of the stratum to be penetrated at a power level that shatters and self-ejects successive cores from the hole. A first fluid blast above the hole deflects the ejected core as it exits from the hole. A second fluid blast above the hole ejects fluid to provide adequate fluid at the strata to be penetrated prior to actuation of the laser for promoting a thermal shock capable of shattering and ejecting the core. Optical sensing separately detects the core shattering and the core ejection to control timed actuation of the system components.

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