| Patent Number |
Title Of Patent |
Date Issued |
| RE32036 |
Drill bit |
November 26, 1985 |
| A new and improved drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein. Nozzle passages extend from the interior of the bit body through |
| 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 |
| 4724913 |
Drill bit and improved cutting element |
February 16, 1988 |
| A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein having polycrystalline diamond cutting elements mounted on said inserts. The diam |
| 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 |
| 4658918 |
Threaded nozzle for a drill bit |
April 21, 1987 |
| A threaded nozzle is adapted to be screwed into and screwed out of a threaded opening in a drill bit. The nozzle includes a front face having first and second contact surfaces which are adapted to be engaged by a manually actuable tool for screwing-in and screwing-out the nozzle. The |
| 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 |
| 4632196 |
Drill bit with shrouded cutter |
December 30, 1986 |
| A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned in recesses therein having polycrystalline diamond cutting elements mounted on said inserts. |
| 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 |
| 4533005 |
Adjustable nozzle |
August 6, 1985 |
| A nozzle includes a tungsten carbide body and threaded steel sleeve. The nozzle body includes a fluid jet opening arranged to be reoriented in response to rotation of the nozzle body. The nozzle body includes a first set of apertures for receiving a turning tool. The sleeve comprises a |
| 4499958 |
Drag blade bit with diamond cutting elements |
February 19, 1985 |
| A drag blade bit for connection on a drill string has a hollow body on which there are welded a plurality of cutting or drilling blades. The blades extend longitudinally and radially of the bit body and terminate in relatively flat, radially extending cutting edges. A plurality of cutter |
| 4499795 |
Method of drill bit manufacture |
February 19, 1985 |
| A method is disclosed for the manufacture of a drill bit having a hollow tubular body, or drill bit components, with an exterior tungsten carbide coated surface, and with cutting elements positioned in the cutting surfaces thereof. The drill bit body, or a bit component, such as a cu |
| 4494618 |
Drill bit with self cleaning nozzle |
January 22, 1985 |
| A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein. Nozzle passages extend from the interior of the bit body through the cutting face fo |
| 4478297 |
Drill bit having cutting elements with heat removal cores |
October 23, 1984 |
| A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein having polycrystalline diamond cutting elements mounted on said inserts. Said ins |
| 4442909 |
Drill bit |
April 17, 1984 |
| A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein. Nozzle passages extend from the interior of the bit body through the cutting face fo |
| 4396077 |
Drill bit with carbide coated cutting face |
August 2, 1983 |
| A drill bit for connection on a drill string has a hollow tubular body with an end cutting face provided with a tungsten carbide coated surface and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein. Nozzle passages extend from the inte |
| 4381825 |
Drill bit nozzle |
May 3, 1983 |
| A drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein and a novel arrangement for securing replaceable nozzles. Nozzle passages extend from |
| 4323130 |
Drill bit |
April 6, 1982 |
| A new and improved drill bit for connection on a drill string has a hollow tubular body with an end cutting face and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein. Nozzle passages extend from the interior of the bit body through |
