Abstract: A mono-planar sealed laser beam alignment device may include a plurality of fasteners holding an upper plate. The device further includes an upper O-ring, a lower O-ring, an inner motion plane, and an outer motion plane. The device further includes a main housing affixed to a laser beam alignment assembly. The laser beam alignment device is configured to provide laser beam alignment with respect to a first axis and a second axis opposed at 90 degrees to the first axis of the laser beam alignment assembly. The first axis and the second axis on a single plane are normal to an optical axis of a laser beam of the laser beam alignment assembly. The plurality of fasteners secure the upper O-ring, the inner motion plane, the lower O-ring, and the outer motion plane into the main housing, creating beam path pressurization by the laser beam alignment device.

Abstract: An example laser tool is configured to operate within a wellbore of a hydrocarbon-bearing rock formation. The laser tool includes one or more optical transmission media as part of an optical path originating at a laser generator configured to generate a laser beam having an axis. The laser tool includes an optical element for receiving the laser beam from the one or more optical transmission media and for output to the hydrocarbon-bearing rock formation. The laser tool includes a purging head for removing dust or vapor from a path of the laser beam. The purging head is for discharging two or more purging gas streams. The purging head may include a coaxial flow assembly and a helical flow assembly. A coaxial purging gas stream may flow in a direction parallel to the axis. A helical purging gas stream may flow in a helical pattern around and substantially along the axis.

Abstract: A mono-planar sealed laser beam alignment device may include a plurality of fasteners holding an upper plate. The device further includes an upper O-ring, a lower O-ring, an inner motion plane, and an outer motion plane. The device further includes a main housing affixed to a laser beam alignment assembly. The laser beam alignment device is configured to provide laser beam alignment with respect to a first axis and a second axis opposed at 90 degrees to the first axis of the laser beam alignment assembly. The first axis and the second axis on a single plane are normal to an optical axis of a laser beam of the laser beam alignment assembly. The plurality of fasteners secure the upper O-ring, the inner motion plane, the lower O-ring, and the outer motion plane into the main housing, creating beam path pressurization by the laser beam alignment device.

Abstract: An example laser tool is configured to operate within a wellbore of a hydrocarbon-bearing rock formation. The laser tool includes one or more optical transmission media as part of an optical path originating at a laser generator configured to generate a laser beam having an axis. The laser tool includes an optical element for receiving the laser beam from the one or more optical transmission media and for output to the hydrocarbon-bearing rock formation. The laser tool includes a purging head for removing dust or vapor from a path of the laser beam. The purging head is for discharging two or more purging gas streams. The purging head may include a coaxial flow assembly and a helical flow assembly. A coaxial purging gas stream may flow in a direction parallel to the axis. A helical purging gas stream may flow in a helical pattern around and substantially along the axis.