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| Number | Title | Issue Date |
| 8162081 | Force balanced asymmetric drilling reamer and methods for force balancing A force balanced asymmetric drilling reamer comprising a plurality of blades, each blade having at least one cutter section and a gage section. The cutter section is designed to have a plurality of cutting devices for cutting through swelling formations and cutting ... | 04/24/2012 |
| 8132633 | Self positioning cutter and pocket A self positioning cutter element and cutter pocket for use in a downhole tool having one or more cutting elements. The self positioning cutter element includes a substrate and a wear resistant layer coupled to the substrate. The cutter element includes a cutting su... | 03/13/2012 |
| 8118119 | Impregnated rotary bit A drill bit includes a plurality of continuous segments impregnated with diamond that are each mounted to form a corresponding blade. The regions between the blades define a plurality of fluid passages on the bit face. The blades extend radially outwardly to the gag... | 02/21/2012 |
| 8109346 | Drill bit supporting multiple cutting elements with multiple cutter geometries and method of assembly A drill bit has cutting elements with multiple cutting surface geometries that are positioned so that their cutting profiles overlap, but do not completely contain or engulf one another. The different cutting surface geometries and the specific overlap create a zone... | 02/07/2012 |
| 8082104 | Method to determine rock properties from drilling logs A method of identifying one or more rock properties and/or one or more abnormalities occurring within a subterranean formation. The method includes obtaining a plurality of drilling parameters, which include at least the rate of penetration, the weight on bit, and t... | 12/20/2011 |
| 7832505 | Rock bit with a thermal insulating seal ring positioned in the seal gland A rock bit includes a shaft and a cone mounted for rotation about the shaft at a journal bearing. A seal gland for the rock bit is defined at least by the shaft and the cone. A compressible seal ring is positioned within the seal gland. A thermal insulating ring is ... | 11/16/2010 |
| 7721827 | Rock bit having a seal gland with a conical sealing surface A drill bit includes a bit head and a rotating bit cone. A sealing system for the drill bit includes a seal gland and a seal retained within the seal gland. The seal gland is defined by a radial cone surface, a head sealing surface and an opposed cone sealing surfac... | 05/25/2010 |
| 7677333 | Drill bit with multiple cutter geometries A drill bit has cutting elements with multiple cutting surface geometries that are positioned so that their cutting profiles overlap, but do not completely contain or engulf one another. The different cutting surface geometries and the specific overlap create a zone... | 03/16/2010 |
| 7258833 | High-energy cascading of abrasive wear components In accordance with the present invention, a method for manufacturing tungsten carbide components is provided. The method includes forming a composite material out of tungsten carbide powder and binder powder, pressing the composite material into a plurality of compo... | 08/21/2007 |
