1
Robert P Radtke: Method of drill bit manufacture. Strata Bit Corporation, Burns Doane Swecker & Mathis, February 19, 1985: US04499795 (195 worldwide citation)

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 cutting blade, is ...


2
Robert P Radtke: Drill bit with carbide coated cutting face. Strata Bit Corporation, Neal J Mosely, August 2, 1983: US04396077 (118 worldwide citation)

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 interior of the ...


3
Robert P Radtke, Wilford V Morris: Drag blade bit with diamond cutting elements. Strata Bit Corporation, Burns Doane Swecker & Mathis, February 19, 1985: US04499958 (107 worldwide citation)

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 cutters are positi ...


4
Martin Barmatz, Henry W Jackson, Robert P Radtke: Microwave technique for brazing materials. California Institute of Technology, Fish & Richardson P C, April 25, 2000: US06054693 (87 worldwide citation)

A method enabling controlled selective heating of workpiece components during microwave brazing. Two workpiece components are joined by melting an adhesion interlayer material between the two components. An indication of when the interlayer has melted is provided. The temperature difference across t ...


5
Robert P Radtke: Drill bit and method of manufacture. NL, September 21, 1982: US04350215 (77 worldwide citation)

A drag drill bit includes a plurality of cutter assemblies comprising synthetic polycrystalline diamonds which are held by brazing material within dimensionally controlled pockets formed in the drill bit matrix. The method of manufacturing the bit includes forming the drill bit head by powder metall ...


6
Robert P Radtke: Drill bit having cutting elements with heat removal cores. Strata Bit Corporation, Burns Doane Swecker & Mathis, October 23, 1984: US04478297 (47 worldwide citation)

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 inserts each having ...


7
Robert P Radtke: Thermally stable diamond brazing. Bruce A Jagger, February 10, 2009: US07487849 (43 worldwide citation)

A cutting element and a method for forming a cutting element is described and shown. The cutting element includes a substrate, a TSP diamond layer, a metal interlayer between the substrate and the diamond layer, and a braze joint securing the diamond layer to the substrate. The thickness of the meta ...


8
Robert P Radtke: Drill bit with self cleaning nozzle. Strata Bit Corporation, Burns Doane Swecker & Mathis, January 22, 1985: US04494618 (31 worldwide citation)

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 for receiving ...


9
Robert P Radtke: Drill bit. Strata Bit Corporation, Neal J Mosely, April 17, 1984: US04442909 (24 worldwide citation)

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 for receiving ...


10
Robert P Radtke: Drill bit nozzle. Strata Bit Corporation, Neal J Mosely, May 3, 1983: US04381825 (24 worldwide citation)

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 the interio ...



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