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https://www.industrial-lasers.com/drilling/article/16484430/drilling-rock
Lasers may also supply a more precise technique for perforation. In 2001 the Department of Energy provided funding to GTI to further the development of laser rock drilling in collaboration with Argonne National Laboratory (ANL) and the Colorado School of Mines.
https://www.industrial-lasers.com/drilling/article/16486680/drilling-rock
Drilling; Drilling rock. R&D activities may lead to a capability that impacts the multi-billion dollar business of drilling gas and oil wells. Mar 1st, 2003. ... Fiber can be used for flexible beam delivery for Nd:YAG and diode lasers but at a power loss of 50 percent/km length. Although there is still sufficient power for processing, the ...
https://www.researchgate.net/publication/328364147_Drilling_large_diameter_holes_in_rocks_using_multiple_laser_beams
1 One of the major obstacles in using laser perforation in practice is beam delivery to deep wells which could be solved by using fiber optics beam delivery. 2 If the laser transmission ...
https://www.laserfocusworld.com/lasers-sources/article/16549519/highpower-lasers-fiber-lasers-drill-for-oil
The Foro process delivers the high-power laser beam to the rock surface, rapidly heating it to hundreds of degrees Celsius. The laser power is integrated with a mechanical drilling bit. The thermal shock “spalls” and softens the rock a couple of millimeters into the surface, then the mechanical drill clears it away.
https://www.ipgphotonics.com/en/applications/materials-processing/drilling
In this case, high peak power q-switched type fiber lasers or shorter variable pulsed fiber lasers are employed with pulse repetition rates up to 1 MHz and pulse lengths as short as 1.5 ns. High power fiber lasers are also currently used for rock drilling applications and for oil and gas exploration industries. The high peak powers and energy ...
https://www.ipgphotonics.com/en/industries/heavy-industry-transport
IPG lasers are widely used in heavy industry applications, from the welding of locomotive engine pistons to the construction of complete bridge structures. IPG lasers are found to be easy to use, easy to integrate process tools that enable demanding applications to be completed.
https://www.photonics.com/Articles/Pulsed_Lasers_Drill_Rock_for_Fuels/a14697
They are capable of drilling 3 to 6 inches in a few seconds, depending on the type of rock. Shale, for example, drills readily with a pulsed laser, but limestone is more difficult. They also have discovered that, in narrow, deep holes, fragments of rock can block the beam, wasting energy.
https://www.researchgate.net/publication/238658127_Drilling_Large_Diameter_Holes_in_Rocks_Using_Multiple_Laser_Beams_504
Drilling Large Diameter Holes in Rocks Using Multiple Laser Beams (504) ... perforation in practice is beam delivery to deep wells which could be ... systems in drilling rock samples that give ...
https://explorer.aapg.org/story/articleid/46683/laser-drilling-becoming-a-reality
Both lasers delivered only continuous wave beams (the COIL is now capable of pulsed beam delivery, however). Laboratory tests were performed on about 150 rock samples to analyze the changes in rock properties caused by lasers. Laser-rock-fluid interactions also were studied. Laser parameters like power, beam type and direction were varied.Author: Kathy Shirley
https://oilvoice.com/Opinion/3590/At-the-cutting-edge-of-laser-technology
Every rock, however, will require a slightly different wavelength of light for the system to perform effectively, she notes. Laser beam delivery can be designed to spall, vaporise or melt the rock, and if there are drill cuttings created, then nitrogen or carbon dioxide are the optimum carrier fluids for removal.
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