Downhole deep tunnel excavation tool and method using high power laser beam

摘要

A downhole laser tool for penetrating a hydrocarbon bearing formation includes a laser surface unit to generate a high power laser beam, a fiber optic cable to conduct the high power laser beam from the laser surface unit to a rotational system that has a rotational head which includes a focusing system and a downhole laser tool head, the focusing system includes a beam manipulator, a focused lens, and a collimator, the downhole laser tool head includes a first cover lens to protect the focusing system, a laser muzzle to discharge the collimated laser beam from the downhole laser tool head into the hydrocarbon bearing formation, a fluid knife to sweep the first cover lens, a purging nozzle to remove dust from the path of the collimated laser beam, a vacuum nozzle to collect dust and vapor from the path of the collimated laser beam.