1
Robert P Radtke: Drill bit and method of manufacture. NL, September 21, 1982: US04350215 (74 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 ...


2
Kristin R Brandenberg, John R Keough, Kathy L Hayrynen, Gerald J Wurtsmith: Method of producing downhole drill bits with integral carbide studs. Applied Process, Harness Dickey & Pierce, October 5, 2004: US06799648 (28 worldwide citation)

A down hole rock drill bit and method of manufacture of the same comprising a cast metal drill bit body having a plurality of hardened carbide studs partially cast in the drill bit body. The drill bit is cast by means of a foam pattern replicating the drill bit, typically made from polystyrene withi ...


3
Duane W Wallace: Drill bit and method of manufacture. Reed Rock Bit Company, Michael J Caddell, November 29, 1983: US04417629 (16 worldwide citation)

A method of making a rolling cutter drill bit involving the steps of forming a body member having an upper portion adapted to be threaded and passaging therein, forming at least one arcuate recess in the lower end of the body member, providing a lug assembly comprising a lug member having a bearing ...


4
John D Barr, Haydn R Lamb: Drill bit and method of manufacture. NL, Browning Bushman Zamecki & Anderson, December 8, 1987: US04711144 (13 worldwide citation)

The invention comprises a method of mounting a cutter, having a stud portion defining one end thereof and a cutting formation generally adjacent the other end, in a pocket in a drill bit body member. The method includes the steps of forming a channel extending into the pocket, inserting brazing mate ...


5
Kristin R Brandenberg, John R Keough, Kathy L Hayrynen, Gerald J Wurtsmith: Method of producing downhole drill bits with integral carbide studs. Applied Process, Harness Dickey & Pierce, March 24, 2009: US07506705

A down hole rock drill bit and method of manufacture of the same comprising a cast metal drill bit body having a plurality of hardened carbide studs partially cast in the drill bit body. The drill bit is cast by means of a foam pattern replicating the drill bit, typically made from polystyrene withi ...


6
Kristin R Brandenberg, John R Keough, Kathy L Hayrynen, Gerald J Wurtsmith: Method of producing downhole drill bits with integral carbide studs. Harness Dickey & Pierce, February 24, 2005: US20050039954-A1

A down hole rock drill bit and method of manufacture of the same comprising a cast metal drill bit body having a plurality of hardened carbide studs partially cast in the drill bit body. The drill bit is cast by means of a foam pattern replicating the drill bit, typically made from polystyrene withi ...


7
Kristin R Brandenberg, John R Keough, Kathy L Hayrynen, Gerald J Wurtsmith: Method of producing downhole drill bits with integral carbide studs. Harness Dickey & Pierce, March 4, 2004: US20040040752-A1

A down hole rock drill bit and method of manufacture of the same comprising a cast metal drill bit body having a plurality of hardened carbide studs partially cast in the drill bit body. The drill bit is cast by means of a foam pattern replicating the drill bit, typically made from polystyrene withi ...


8
Gavin T McLeod: Segment for a core drill bit and method of manufacture. Patrick J Finnan, Epstein Edall Shapiro Finnan & Lylle, February 13, 2003: US20030029643-A1

A core drill bit segment (10) comprises an elongated member (12) having an upper end (14), a lower end (16), first side (18) and opposite second side (20). Attached to the lower end (16) is matrix (22). The matrix (22), while depending from the lower end (16) also extends upwardly toward the upper e ...


9
Mcleod Gavin Thomas: Segment for a core drill bit and method of manufacture. Dht Technologies, Mcleod Gavin Thomas, MIZZI Anthony Paul, September 27, 2001: WO/2001/071152

A core drill bit segment (10) comprises an elongated member (12) having an upper end (14), a lower end (16), first side (18) and opposite second side (20). Attached to the lower end (16) is matrix (22). The matrix (22), while depending from the lower end (16) also extends upwardly toward the upper e ...


10


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