http://www.freshpatents.com/Boring-or-penetrating-the-earth-dtnewntc175.php USPTO Class 175 - Boring or penetrating the earth en-us Fri, 19 Dec 2008 00:01:01 -0800 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/Dual-gradient-drilling-method-and-apparatus-with-an-adjustable-centrifuge-dt20081211ptan20080302569.php Fri, 19 Dec 2008 00:01:01 -0800 A method and system for controlling drilling mud density in drilling operations. The mud required at the wellhead is combined with a base fluid of a different density to produce diluted mud in the riser. By combining the appropriate quantities of drilling mud with base fluid, riser mud density at... http://www.freshpatents.com/Dual-gradient-drilling-method-and-apparatus-with-an-adjustable-centrifuge-dt20081211ptan20080302570.php Fri, 19 Dec 2008 00:01:01 -0800 A method and system for controlling drilling mud density in drilling operations. The mud required at the wellhead is combined with a base fluid of a different density to produce diluted mud in the riser. By combining the appropriate quantities of drilling mud with base fluid, riser mud density at... http://www.freshpatents.com/Drill-bit-porting-system-dt20081211ptan20080302572.php Fri, 19 Dec 2008 00:01:01 -0800 In one aspect of the present invention a drill bit has a jack element with a distal end extending beyond a working face. A porting mechanism within the bore comprises first and second discs contacting along a flat interface. The first disc is attached to a turbine which is adapted... http://www.freshpatents.com/Drilling-tool-for-reducing-cutter-damage-when-drilling-through-formation-changes-and-methods-of-design-and-operation-thereof-dt20081211ptan20080302573.php Fri, 19 Dec 2008 00:01:01 -0800 A drilling tool including at least two cutting elements (e.g., redundant or upon a selected profile region) sized, positioned, and configured thereon so as to contact or encounter a change in at least one drilling characteristic of a subterranean formation along an anticipated drilling path prior to other cutting elements... http://www.freshpatents.com/Fluid-actuated-circulating-sub-dt20081211ptan20080302571.php Fri, 19 Dec 2008 00:01:01 -0800 A downhole device used to divert fluid flow out of a work string into an annulus. The downhole device is activated by the movement of a plurality of pistons within the downhole device. Fluid flow through a restriction of the downhole device creates an increase in fluid pressure causing the... http://www.freshpatents.com/Drill-stem-and-method-dt20081211ptan20080302574.php Fri, 19 Dec 2008 00:01:01 -0800 A drill stem segment and method of manufacture are shown. Drill stem segment and methods are shown that greatly strengthen the weld joint using sleeves. reinforced butt joints are shown in selected examples where sleeves and drill stem tubes are welded to connections such as tapered thread connections. Using methods... http://www.freshpatents.com/Fixed-cutter-bit-with-backup-cutter-elements-on-primary-blades-dt20081211ptan20080302575.php Fri, 19 Dec 2008 00:01:01 -0800 A drill bit for drilling a borehole comprises a bit body having a bit face. In addition, the drill bit comprises a plurality of primary blades. Further, the drill bit comprises a plurality of primary cutter elements mounted to each primary blade and at least one backup cutter element mounted... http://www.freshpatents.com/Earth-boring-bits-dt20081211ptan20080302576.php Fri, 19 Dec 2008 00:01:01 -0800 The present invention relates to compositions and methods for forming a bit body for an earth-boring bit. The bit body may comprise hard particles, wherein the hard particles comprise at least one carbide, nitride, boride, and oxide and solid solutions thereof, and a binder binding together the hard particles. The... http://www.freshpatents.com/Drill-bit-dt20081211ptan20080302577.php Fri, 19 Dec 2008 00:01:01 -0800 A drill bit having a body with a stationary cutter and a rotatable cutter such that in a first position the rotatable cutter does not radially extend beyond a periphery of the stationary cutter and in a second position the rotatable cutter radially extends beyond the periphery of the stationary... http://www.freshpatents.com/Cutting-elements-and-bits-incorporating-the-same-dt20081211ptan20080302578.php Fri, 19 Dec 2008 00:01:01 -0800 A cutting element is provided including a substrate having a periphery and an interface surface. An ultra hard material layer is formed over the substrate and interfaces with the interface surface. The interface surface also includes a plurality of spaced apart projections formed inwardly and spaced apart from the periphery... http://www.freshpatents.com/Polycrystalline-diamond-cutting-elements-having-improved-thermal-resistance-dt20081211ptan20080302579.php Fri, 19 Dec 2008 00:01:01 -0800 Polycrystalline diamond constructions of this invention have a polycrystalline diamond body and a substrate attached thereto, wherein the diamond body has a material microstructure comprising a plurality of bonded-together diamond crystals forming a polycrystalline matrix phase, and second phase formed from different types of materials or sintering aids designed to...