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| Number | Title | Issue Date |
| 8141665 | Drill bits with bearing elements for reducing exposure of cutters A bearing element for a rotary, earth boring drag bit effectively reduces an exposure of at least one adjacent cutting element by a readily predictable amount, as well as a depth-of-cut (DOC) of the cutter. The bearing element has a substantially uniform thickness a... | 03/27/2012 |
| 8122980 | Rotary drag bit with pointed cutting elements In one aspect of the invention a rotary drag bit has a bit body intermediate a shank and a working surface. The working surface has a plurality of blades converging at a center of the working surface and diverging towards a gauge of the working surface. At least one... | 02/28/2012 |
| 8104551 | Excavation tool Provided is an excavation tool which can firmly fix a locking pin so that the locking pin does not move even in the case of an impact during excavation and/or the locking pin being pushed out in the insertion/removal direction. The excavation tool (10)... | 01/31/2012 |
| 8091655 | Rolling cutter A cutting element for a drill bit that includes an outer support element having at least a bottom portion and a side portion; and an inner rotatable cutting element, a portion of which is disposed in the outer support element, wherein the inner rotatable cutting ele... | 01/10/2012 |
| 8079431 | Drill bit having rotational cutting elements and method of drilling A rotary drill bit is disclosed. The rotary drill bit may include a bit body, a cutting pocket defined in the bit body, and a cutting element rotatably coupled to the bit body. The cutting element may be positioned at least partially within the cutting pocket. The r... | 12/20/2011 |
| 8066087 | Thermally stable ultra-hard material compact constructions Thermally stable ultra-hard compact constructions comprise a polycrystalline diamond body substantially free of a catalyst material, and a substrate that is joined thereto. The substrate can be ceramic, metallic, cermet and combinations thereof, and can be joined to... | 11/29/2011 |
| 8025113 | Detritus flow management features for drag bit cutters and bits so equipped Rock detritus created by a drag bit cutter shearing subterranean formation material may flow under a cutter and attach itself to a side surface of a cutter barrel by differential pressure-induced sticking, and dilate. This attached material, confined by hydrostatic ... | 09/27/2011 |
| 8020642 | Polycrystalline diamond abrasive elements A polycrystalline diamond abrasive element, particularly a cutting element, comprises a table of polycrystalline diamond bonded to a substrate, particularly a cemented carbide substrate, along a non-planar interface. The non-planar interface typically has a crucifor... | 09/20/2011 |
| 7987931 | Cutting element apparatuses, drill bits including same, methods of cutting, and methods of rotating a cutting element A rotary drill bit for drilling a subterranean formation may comprise a bit body, a cutting element coupled to the bit body, and a torque-generating assembly configured to apply torque, either continuously or periodically, to the cutting element. The torque-generati... | 08/02/2011 |
| 7942218 | Cutting element apparatuses and drill bits so equipped A cutting element assembly for use on a rotary drill bit for forming a borehole in a subterranean formation. A cutting element assembly includes a cutting element having a substrate. The cutting element assembly additionally includes a superabrasive material bonded ... | 05/17/2011 |
| 7836980 | Earth-boring tools having pockets for receiving cutting elements and methods for forming earth-boring tools including such pockets Methods of forming cutting element pockets in blades of earth-boring tools include forming a first recess and a second recess intersecting at a location defining the a back of the pocket using a cutter oriented in a manner so as to avoid tool path interference with ... | 11/23/2010 |
| 7836981 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same Cutting elements are provided having substrates including end surfaces. TSP material layers extend over only a portion of the end surfaces or extend into the substrates below the end surfaces. Bits incorporating such cutting elements are also provided. ... | 11/23/2010 |
| 7814998 | Superabrasive cutting elements with enhanced durability and increased wear life, and drilling apparatus so equipped A cutting element for use in drilling subterranean formations. The cutting element includes a superabrasive table mounted to a supporting substrate. The superabrasive table includes a two-dimensional cutting face having a cutting edge along at least a portion of its... | 10/19/2010 |
| 7762359 | Cutter assembly including rotatable cutting element and drill bit using same A cutter assembly including a rotatable cutting element, a rotary drill bit that may employ such a cutter assembly, and a method of fabricating a cutter assembly are disclosed. In one embodiment of the present invention, a cutter assembly comprises a housing includi... | 07/27/2010 |
| 7757790 | Superabrasive compact with selected interface and rotary drill bit including same A superabrasive compact including a superabrasive layer bonded to a substrate along a selected interface is disclosed. In one embodiment, an interface may comprise a depression and a dividing wall, wherein the dividing wall forms at least one closed plane figure. In... | 07/20/2010 |
| 7757789 | Drill bit and insert having bladed interface between substrate and coating A rolling cone bit and a cutting insert for a rolling cone are disclosed. The insert includes an undulating cutting surface including a peak, and blades radiating therefrom. The cutting insert may include an ultrahard layer of diamond or other superabrasive material... | 07/20/2010 |
| 7717199 | Cutting elements and bits incorporating the same Cutting elements and bits incorporating such cutting elements. The cutting elements include a substrate having an interface surface over which is formed an ultra hard material layer. A plurality of lands are formed on the interface surface including a land surrounde... | 05/18/2010 |
| 7703559 | Rolling cutter A cutting element for a drill bit that includes an outer support element having at least a bottom portion and a side portion; and an inner rotatable cutting element. A portion of the inner rotatable cutting element is disposed in the outer support element, where the... | 04/27/2010 |
| 7703560 | Cutting element with canted interface surface and bit body incorporating the same The present invention provides a cutting element having a cylindrical body having a canted end face on which is formed an ultra hard material layer and to a bit incorporating such cutting element. One or a plurality of transition layers may be provided between the u... | 04/27/2010 |
| 7644786 | Diamond bit steel body cutter pocket protection A drill bit that includes a steel bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade; at least one cutter disposed in the at least one cutter pocket; at least one recess formed in at least a portion of the surfa... | 01/12/2010 |
| 7604073 | Cutting element apparatuses, drill bits including same, methods of cutting, and methods of rotating a cutting element A rotary drill bit for drilling a subterranean formation may comprise a bit body, a cutting element coupled to the bit body, and a torque-generating assembly configured to apply torque, either continuously or periodically, to the cutting element. The torque-generati... | 10/20/2009 |
| 7604074 | Cutting elements and bits incorporating the same 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 proj... | 10/20/2009 |
| 7600590 | Low projection inserts for rock bits An earth boring bit has an outer row of inserts located within extra deep holes. Each of the holes has a cylindrical sidewall with a depth greater than the length of the barrel of the insert mounted within. The difference in depth is at least equal to a distorted en... | 10/13/2009 |
| 7571782 | Stiffened blade for shear-type drill bit In one aspect of the invention, a drill bit comprises a steel body disposed intermediate a threaded end and a working face. The steel body comprises a plurality of steel blades disposed along an outer diameter of the body and extending radially away from an axis of ... | 08/11/2009 |
| 7533740 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same Cutting elements are provided having substrates including end surfaces. TSP material layers extend over only a portion of the end surfaces or extend into the substrates below the end surfaces. Bits incorporating such cutting elements are also provided. ... | 05/19/2009 |
| 7533739 | Cutting element apparatuses and drill bits so equipped A cutting element assembly for use on a rotary drill bit for forming a borehole in a subterranean formation. A cutting element includes a substrate having a base member affixed to a back surface of the substrate is disclosed, wherein the base member includes a reces... | 05/19/2009 |
| 7520345 | Fixed cutter rotary drill bit including support elements affixed to the bit body at least partially defining cutter pocket recesses A rotary drag bit for drilling a subterranean formation includes a plurality of support elements affixed to the bit body, each forming at least a portion of a cutting element pocket. Each of a plurality of cutting elements has a substantially cylindrical body and is... | 04/21/2009 |
| 7493972 | Superabrasive compact with selected interface and rotary drill bit including same A superabrasive compact including a superabrasive layer bonded to a substrate along a selected interface is disclosed. In one embodiment, an interface may comprise a depression and a dividing wall, wherein the dividing wall forms at least one closed plane figure. In... | 02/24/2009 |
| 7469757 | Drill bit with diamond impregnated cutter element The present invention provides a bit with cutting structures or inserts that include diamond particles, in which the diamond-impregnated inserts are surrounded by substantially diamond-free support members. The diamond-impregnated inserts are manufactured separately... | 12/30/2008 |
| 7395885 | Cutting element with canted interface surface and bit body incorporating the same The present invention provides a cutting element having a cylindrical body having a canted end face on which is formed an ultra hard material layer and to a bit incorporating such cutting element. One or a plurality of transition layers may be provided between the u... | 07/08/2008 |
| 7373998 | Cutting element with improved cutter to blade transition Cutting elements having a slanted top surface for an improved cutter to blade transition, the slanted top surface being integratable into a receiving pocket of a bit blade such that the slanted top surface and the perimeter of the receiving pocket are relatively con... | 05/20/2008 |
| 7368079 | Method for forming ultra hard sintered compacts using metallic peripheral structures in the sintering cell A method for forming an ultra hard material layer is provided. The method includes disposing a metallic liner inside the periphery of a refractory metal enclosure, introducing ultra hard material feed stock into the enclosure, and sintering using HPHT processing and... | 05/06/2008 |
| 7363992 | Cutters for downhole cutting devices Improved cutter design as well as an improved design for downhole cutters, such as mandrel cutters and rotary cutter mills. A cutter is described with a rectangular, rounded “lozenge” shape. The cutter presents a cross-sectional cutting area having a pair of cur... | 04/29/2008 |
| 7360612 | Roller cone drill bits with optimized bearing structures A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a re... | 04/22/2008 |
| 7360608 | Rotary drill bits including at least one substantially helically extending feature and methods of operation A rotary drill bit is disclosed, including at least one cutting element affixed thereto and configured to form a distinct borehole surface in response to drilling a subterranean formation. At least one substantially helically extending feature associated with the at... | 04/22/2008 |
| 7334652 | Roller cone drill bits with enhanced cutting elements and cutting structures Roller cone drill bits are provided with cutting elements and cutting structures optimized for efficient drilling of soft and medium formations interspersed with hard stringers. The cutting elements and cutting structures may be satisfactorily used to drill downhole... | 02/26/2008 |
| 7316279 | Polycrystalline cutter with multiple cutting edges A cutting element includes a layer of integrally bonded superabrasive particles disposed over a substrate. The layer has an outer circumference comprising at least one trough having a distinct cutting point on either side of the trough. A rock drilling drag bit inco... | 01/08/2008 |
| 7308957 | Fixed-head bit with stabilizing features A fixed-head drill bit includes a bit body having a plurality of cutting elements and at least one wear knuckle disposed on the bit body. Each cutting element includes a cutting surface defining a swept cutting profile when the bit is rotated about an axis. The at l... | 12/18/2007 |
| 7299537 | Method of making an integrated inductor An inductor comprises a substrate comprising a semiconductor material, a first dielectric layer over the substrate, a magnetic layer over the first dielectric layer, a second dielectric layer over the magnetic layer, and a conductor over the second dielectric layer.... | 11/27/2007 |
| 7287610 | Cutting elements and bits incorporating the same Cutting elements and bits incorporating such cutting elements are provided. The cutting elements include a substrate having an interface surface over which is formed an ultra hard material layer. A plurality of lands are formed on the interface surface. A plurality ... | 10/30/2007 |
