Downhole high-power laser tool for subsurface applications

A method for operating a downhole laser tool, the method comprising:

• lowering the downhole laser tool in a downhole environment of a well;
• turning ON a laser unit of the downhole laser tool, the laser unit comprising a laser emitting a laser beam;
• guiding the laser beam, through a first segment of the downhole laser tool, using one or more lenses of the first segment and a first retractable reflector of the first segment;
• controlling retraction of the first retractable reflector to guide the laser beam to a first aperture of the first segment that passes the laser beam to the downhole environment;
• controlling rotation of a first rotational joint, disposed between the laser unit and the first segment, that connects the laser unit to the first segment and rotates the first aperture;
• emitting the laser beam through the first aperture onto a first sidewall of the downhole environment;
• and
• ejecting a fluid to an outer side of the first aperture, to sweep debris away from the first aperture,
• wherein in the lowering of the downhole laser tool in the downhole environment, the laser unit, the first rotational joint, and the first segment are disposed longitudinally along the well, and
• wherein, during operation of the downhole laser tool, the laser unit, the first rotational joint, and the first segment navigate in the downhole environment as one integral tool.