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 assisted blowout preventer and methods of use. In particular, there are provided systems and assemblies for utilizing high power laser energy within a blowout preventer to cut tubulars that are present within the bore of the blowout prevent, reducing the risk that such tubulars will inhibit the ability of the blowout preventer to seal a well.

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: A drill bit for cutting a borehole through an earthen formation comprises a bit body having a bit axis. In addition, the drill bit comprises a rolling cone cutter mounted on the bit body and adapted for rotation about a cone axis. Further, the drill bit comprises an insert having a base portion secured in the rolling cone cutter and having a cutting portion extending therefrom, the insert having an initial impact direction. The cutting portion of the insert has a cutting surface comprising a planar surface defining an extension height. Moreover, the cutting portion of the insert comprises an indentation extending at least partially through the upper planar surface, the indentation including a forward facing formation engaging surface and a lower surface defining a depth of the indentation.

Abstract: A drill bit for cutting a borehole through an earthen formation comprises a bit body having a bit axis. In addition, the drill bit comprises a rolling cone cutter mounted on the bit body and adapted for rotation about a cone axis. Further, the drill bit comprises an insert having a base portion secured in the rolling cone cutter and having a cutting portion extending therefrom, the insert having an initial impact direction. The cutting portion of the insert has a cutting surface comprising a planar surface defining an extension height. Moreover, the cutting portion of the insert comprises an indentation extending at least partially through the upper planar surface, the indentation including a forward facing formation engaging surface and a lower surface defining a depth of the indentation.