Abstract: There is provided a high power laser rotational optical assembly for use with, or in high power laser tools for performing high power laser operations. In particular, the optical assembly finds applications in performing high power laser operations on, and in, remote and difficult to access locations. The optical assembly has rotational seals and bearing configurations to avoid contamination of the laser beam path and optics.

Abstract: There is provided a monitoring and detection system for use with, or in, high power laser system, long distance high power laser system and tools for performing high power laser operations, and in particular for performing high power laser operation on, and in, remote and difficult to access locations.

Abstract: There is provided a high power laser drilling system utilizing an electric motor laser bottom hole assembly having the high power laser beam traveling within the electric motor for advancing a borehole. The systems may include a down hole electrical motor having a hollow rotor for conveying a high power laser beam through the motor.

Abstract: There is provided a high power laser system for powering a remotely located laser device, such as an ROV, using a high power laser fiber optic tether and a photo-conversion device, such as a laser photovoltaic assembly. Laser device systems, such as ROV systems that utilizes a high power laser cutting and/or cleaning tools are also provided.

Abstract: There is provided a laser-mechanical method for drilling boreholes that utilizes specific combinations of high power directed energy, such as laser energy, in combination with mechanical energy to provide a synergistic enhancement of the drilling process.

Abstract: There is provided a high power laser-mechanical bit for use with a laser drilling system and a method for advancing a borehole. The laser-mechanical bit has a beam path and mechanical removal devices that provide for the removal of laser-affected rock to advance a borehole.

Abstract: There is provided a high power laser tool system for transmitting and delivering high power laser energy within the interior of pipes, which includes a high power laser-pig and long distance high power optical tether. The high power laser system performs high power laser pigging operations and other operations, such as, cleaning, assembling, maintaining and monitoring of pipelines.

Abstract: There is provided a control, monitoring, and control and monitoring system for controlling and monitoring a high power laser system for performing high power laser operations and, in particular, for performing high power laser operation on, and in, remote and difficult to access locations.

Abstract: There is provided a high power laser-riser blowout preventer package and laser module for use with a subsea riser. The laser module and laser-riser package use high power laser energy to quickly cut the riser permitting an offshore drilling rig to quickly, and in a controlled manner disconnect from a blowout preventer.

Abstract: There are provided high power laser systems, apparatus and methods for performing laser operations in particular in environments where an optically obstructive medium may be present in the laser beam path, such as within the borehole of an oil, gas or geothermal well, or below the surface of a body of water. Further, there are provided such systems, apparatus and methods that manage potentially damaging back reflections that may be generated during such laser operations. The high power laser operations would including tasks, such as, window cutting, pipe cutting and other workover completion activities, as well as decommissioning, plugging and abandonment tasks.

Abstract: There is provided a mobile high power laser system and conveyance structure for delivering high power laser energy to and for performing high power laser operations in remote and difficult to access locations. There is further provide such systems with high power laser, handling equipment and conveyance equipment that are configured to avoid exceeding the maximum bending radius of high power optical fibers used with the conveyance structures. There are also provided embodiments of the conveyance structures having channels, lines and passages for delivering materials such as fluids.

Abstract: There is provided a system and apparatus for the transmission of high power laser energy over great distances without substantial power loss and without the presence of stimulated Raman scattering. There is further provided systems and optical fiber cable configurations and optical fiber structures for the delivering high power laser energy over great distances to a tool or surface to perform an operation or work with the tool or upon the surface.

Abstract: There is provided a system, apparatus and methods for delivering high power laser energy to advance a borehole deep into the earth using laser energy. In particular, there is provided a laser bottom hole assembly (LBHA) for the delivery of such laser energy to the surfaces of a borehole, which assembly may have laser optics, a fluid path for debris removal and a mechanical means to remove earth.

Abstract: There is provided a system, apparatus and methods for the laser drilling of a borehole in the earth. There is further provided with in the systems a means for delivering high power laser energy down a deep borehole, while maintaining the high power to advance such boreholes deep into the earth and at highly efficient advancement rates, a laser bottom hole assembly, and fluid directing techniques and assemblies for removing the displaced material from the borehole.

Abstract: There is provided a system, apparatus and methods for providing a laser beam to borehole surface in a predetermined and energy deposition profile. The predetermined energy deposition profiles may be uniform or tailored to specific downhole applications. Optic assemblies for obtaining these predetermined energy deposition profiles are further provided.

Abstract: There is provided a system, apparatus and methods for removal of material for the path of a laser beam during laser drilling of a borehole and for removal of displaced borehole material from the borehole during laser drilling. In particular, there are provided paths, dynamics and parameters of fluid flows, and apparatus for obtaining such, for use in conjunction with a laser bottom hole assembly.

Abstract: A semiconductor laser device includes a tailored index single mode power amplifier. A high-power laser system can be produced by connecting several of the tailored index single mode power amplifiers in parallel. In an exemplary case, a phase shifting device can be optically coupled to each of the tailored index single mode power amplifiers; the phase shifting devices can be controlled to ensure that the laser beams output by the tailored index single mode power amplifiers are both phase aligned and wavefront matched.

Abstract: A semiconductor laser device includes a tailored index single mode power amplifier. A high-power laser system can be produced by connecting several of the tailored index single mode power amplifiers in parallel. In an exemplary case, a phase shifting device can be optically coupled to each of the tailored index single mode power amplifiers; the phase shifting devices can be controlled to ensure that the laser beams output by the tailored index single mode power amplifiers are both phase aligned and wavefront matched.

Abstract: A semiconductor laser device includes a tailored index single mode power amplifier. A high-power laser system can be produced by connecting several of the tailored index single mode power amplifiers in parallel. In an exemplary case, a phase shifting device can be optically coupled to each of the tailored index single mode power amplifiers; the phase shifting devices can be controlled to ensure that the laser beams output by the tailored index single mode power amplifiers are both phase aligned and wavefront matched.