Patent ID: 9562395
Date: 2017-02-07
CPC Classifications: E21B

Claim:
1. A flat bottom fixed cutter laser-mechanical bit comprising: a. a bottom section having a central axis, a width and a flat bottom end, wherein the bottom end is configured to engage a borehole surface; b. a beam path channel defined, in part, by a plurality of beam blades, wherein the beam path channel forming a shape, wherein the shape includes at least one member of a group comprising: a rectangle and an ellipse extends across the width of the flat bottom end of the bottom section and through the central axis; c. a plurality of cutter blades; and, d. the cutter blades and the beam blades each having a lower end; e. wherein, the lower ends are configured to be essentially coplanar, thereby defining the flat bottom end; f. whereby, the bit is capable of laser-mechanical drilling an essentially flat bottom borehole; and, g. a beam blade having a passage in fluid communication with a junk slot, the junk slot being located on the exterior surface of the bit.