| Patent Number |
Title Of Patent |
Date Issued |
| 6500226 |
Method and apparatus for fabrication of cobalt alloy composite inserts |
December 31, 2002 |
| This disclosure features a process of making a two part drill bit insert, namely, a body portion of hard particles such as tungsten carbide particles mixed in an alloy binding the particles. The alloy preferably comprises 6% cobalt with amounts up to about 10% permitted. The body is |
| 6488103 |
Drilling tool and method of using same |
December 3, 2002 |
| A drilling tool having a pilot bit on an end of a main shaft is surrounded by outer shafts having mills on their ends. The bit and mills employ cutters with PDC. The pilot bit rotates in a direction opposite the direction of rotation of the mills. A transmission for rotating a main s |
| 5624068 |
Diamond tools for rock drilling, metal cutting and wear part applications |
April 29, 1997 |
| The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- or PVD-fabricated diamond and then HP/HT treated in |
| 5544713 |
Cutting element for drill bits |
August 13, 1996 |
| A cutting element which has a metal carbide stud having a conic tip formed with a reduced diameter hemispherical outer tip end portion of said metal carbide stud. A layer of polycrystalline material, resistant to corrosive and abrasive materials, is disposed over the outer end portion of |
| 5524719 |
Internally reinforced polycrystalling abrasive insert |
June 11, 1996 |
| An insert for a drill bit is set forth. The insert is formed with an elongate body, typically having a cylindrical cross section terminating at an exposed outer end. The outer end is covered with a polycrystalline disc. In the present disclosure, the polycrystalline disc is reinforced |
| 5499688 |
PDC insert featuring side spiral wear pads |
March 19, 1996 |
| The present disclosure sets forth various forms of inserts for operating as elements in bearing drill bits and similar devices. A single insert is formed with an external side face of cylindrical construction. One or more strips of hardened materials such as diamond or other hard materia |
| 5496638 |
Diamond tools for rock drilling, metal cutting and wear part applications |
March 5, 1996 |
| The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- or PVD-fabricated diamond and then HP/HT treated in |
| 5342129 |
Bearing assembly with sidewall-brazed PCD plugs |
August 30, 1994 |
| A method of forming a bearing assembly is set forth. A PCD disk typically of circular construction is joined to a cylindrical plug formed of support metal. The plug is registered with respect to an internal shoulder in a passage formed in a ring for the bearing assembly. Multiple PCD dis |
| 5335738 |
Tools for percussive and rotary crushing rock drilling provided with a diamond layer |
August 9, 1994 |
| The present invention relates to a rock bit button of cemented carbide for percussive or rotary crushing rock drilling. The button is provided with a layer of diamond produced at high pressure and high temperature in the diamond stable area.The cemented carbide has a multi-phase structur |
| 5264283 |
Diamond tools for rock drilling, metal cutting and wear part applications |
November 23, 1993 |
| The present invention relates to buttons, inserts and bodies for rock drilling, rock cutting, metal cutting and wear part applications. The buttons, inserts and bodies comprise cemented carbide provided with bodies and/or layers of CVD- or PVD-fabricated diamond and then HP/HT treated in |
| 5217081 |
Tools for cutting rock drilling |
June 8, 1993 |
| The present invention relates to a rock bit insert of cemented carbide for cutting rock drilling. The insert is provided with one or more bodies or layers of diamond or cBN produced at high pressure and high temperature in the diamond or cBN stable area.The body of cemented carbide has a |
| 5154245 |
Diamond rock tools for percussive and rotary crushing rock drilling |
October 13, 1992 |
| The present invention relates to a rock bit button of cemented carbide for percussive or rotary crushing rock drilling. The button is provided with one or more bodies of polycrystalline diamond in the surface produced at high pressure and high temperature in the diamond stable area. Each |
| 5120327 |
Cutting composite formed of cemented carbide substrate and diamond layer |
June 9, 1992 |
| A composite for cutting in subterranean formations comprises a cemented carbide substrate and a diamond layer adhered to a surface of the substrate. That surface includes a plurality of spaced apart ridges forming grooves therebetween. The diamond layer has a thickness greater than a |
| 4819516 |
Method of forming a cutting element having a V-shaped diamond cutting face |
April 11, 1989 |
| A cutting element has a V-shaped diamond cutting face. The cutting element is formed from a single circular cutting blank by cutting the blank into segments, joining two identical ones of the segments, and truncating the joined segments. |
| 4784023 |
Cutting element having composite formed of cemented carbide substrate and diamond layer and meth |
November 15, 1988 |
| A cutting element comprises a stud and a composite bonded thereto. The composite comprises a substrate formed of cemented carbide, and a diamond layer bonded to the substrate. The interface between the diamond layer and substrate is defined by alternating ridges of diamond and cemented c |
| 4749052 |
Cutting element adapted to be pushed into a recess of a drill bit body |
June 7, 1988 |
| A cutting element of the type which is pushed into a preformed hole of a drill bit by means of a pusher tool. The cutting element comprises a generally cylindrical stud having an inclined support face adjacent a forward end of the stud. A polycrystalline diamond substance is disposed |
| 4739845 |
Nozzle for rotary bit |
April 26, 1988 |
| A rotary drill bit comprises a bit body carrying a plurality of cutting elements and a main conduit for conducting drilling fluid. A plurality of nozzle bodies is rotatably seated in bores of the bit body. Each nozzle body includes a plurality of passages extending therethrough for c |
| 4727945 |
Cutting element having diamond cutting blank reinforced by a shoulder |
March 1, 1988 |
| A cutting element includes a stud having an inclined supporting surface. The supporting surface intersects a side surface of the stud to form an edge. A cutting member is bonded to the supporting surface. A reinforcing shoulder projects from the supporting surface adjacent a rear portion |
| 4716975 |
Cutting element having a stud and cutting disk bonded thereto |
January 5, 1988 |
| A cutting element for use in rotary drill bits comprises a generally cylindrical stud and a cutting disk bonded to a supporting surface of the stud. The supporting surface intersects a cylindrical side surface of the stud to form an edge. The supporting surface includes a plurality of |
| 4705123 |
Cutting element for a rotary drill bit and method for making same |
November 10, 1987 |
| A cutting element comprises a stud and a cutting blank bonded to a mounting face of the stud. The stud comprises stiffening elements of a refractory carbide embedded in a body of steel. The mounting surface is formed partially of carbide and partially of steel, and the cutting blank is |
| 4662896 |
Method of making an abrasive cutting element |
May 5, 1987 |
| An abrasive compact is made by a method comprising the steps of providing a circular cylindrical substrate having an upper with a non-circular recess therein defined by non-intersecting side walls. The recess is filled with diamond grains and is positioned in a press. The substrate and d |
| 4640374 |
Rotary drill bit |
February 3, 1987 |
| A rotary drill bit includes a cutting face having a peripheral edge and a central recess. A plurality of fluid discharge nozzles are mounted in bores in the cutting face. A plurality of cutter elements are mounted in the peripheral edge and in the recess to fracture an earthen core forme |
| 4592433 |
Cutting blank with diamond strips in grooves |
June 3, 1986 |
| A cutting blank, preferably for use on a drill bit for cutting through earth formations, comprises a substrate formed of a hard material and including a cutting surface. A plurality of shallow grooves are formed in the cutting surface and each groove includes opposing side and base p |
| 4538691 |
Rotary drill bit |
September 3, 1985 |
| A rotary drill bit includes a cutting face having a peripheral edge and a central recess. A plurality of fluid discharge nozzles are mounted in the cutting face. A plurality of cutter elements are mounted in the peripheral edge and in the recess to fracture an earthen core formed as the |
| 4247305 |
Abrasive structures and methods of their preparation |
January 27, 1981 |
| Composite compacts comprising a cluster of abrasive particles selected from among diamond, cubic boron nitride and wurtzite boron nitride on a support medium, are securely bonded to metal tool parts by a process comprising providing a bond initiator between, and in contact with, a surfac |
