1
Eric F Drake: Methods of manufacturing gradient composite metallic structures. Reed Rock Bit Company, Michael J Caddell, August 16, 1983: US04398952 (129 worldwide citation)

A method is disclosed for forming roller cutters and also for forming cutting teeth for rolling cutter bits, including cutter inserts, cutter teeth formed in place, or formed separately and welded in place, etc., by powder metallurgy as a densified powder metallurgical composite of at least two vary ...


2
Percy W Schumacher: Inserts for drilling bits. Reed Rock Bit Company, Carl Rowald, June 15, 1982: US04334586 (77 worldwide citation)

Inserted hard metal cutting elements are disclosed which are advantageous for inserting into the cutters of drilling bits used in drilling underground formations. The inserted cutting elements comprise asymmetrical inserts placed in at least one row of a cutter in alternating alignment circumferenti ...


3
Kenneth W Jones: Rotary drill bit having drag cutting elements. Reed Rock Bit Company, Carl A Rowold, November 26, 1985: US04554986 (64 worldwide citation)

A rotary drill bit comprising a bit body having a plurality of drag cutting elements mounted on the bottom thereof. Each cutting element has a portion projecting down below the bit body and forward generally in the direction of rotation of the bit. This portion presents a leading face and a trailing ...


4
John D Parrish: Large diameter oil well drilling bit. Reed Rock Bit Company, Michael J Caddell, January 25, 1983: US04369849 (49 worldwide citation)

The present invention discloses a large diameter oil well drilling bit which utilizes a unique cast body upon which are secured a plurality of cutting assemblies comprising a leg, a bearing journal and a rolling cutter mounted on the bearing journal.


5
Percy W Schumacher Jr, Kenneth W Jones, Henry W Murdoch, Paul E Pastusek: Combination drag and roller cutter drill bit. Reed Rock Bit Company, Carl Rowold, April 24, 1984: US04444281 (48 worldwide citation)

A rotary drill bit comprising a bit body having at least one depending leg at its lower end and at least one roller cutter rotatably mounted on the leg. The roller cutter comprises a frustoconical roller cutter body and a plurality of cutting elements projecting from the cutter body to tips adapted ...


6
John S Childers, Paul E Pastusek, Percy W Schumacher Jr: Drill bit having offset roller cutters and improved nozzles. Reed Rock Bit Company, Carl A Rowold, September 16, 1986: US04611673 (44 worldwide citation)

This invention discloses a rolling cone drilling bit comprising a plurality of conical roller cutters having hard metal cutting elements thereon and being so positioned relative to each other that their rotational axes are offset from the rotational axis of the drill bit, and a drilling fluid nozzle ...


7
Eric F Drake: Metal cutting tools utilizing gradient composites. Reed Rock Bit Company, Michael J Caddell, January 18, 1983: US04368788 (44 worldwide citation)

A rolling cutter drill bit is disclosed having cutters manufactured by powder metallurgy techniques, said cutters having gradient composite metallic structures in the cutting areas arranged to reduce or eliminate physical and metallic discontinuities and stress risers.


8
Eric F Drake: Cutting teeth for rolling cutter drill bit. Reed Rock Bit Company, Michael J Caddell, February 8, 1983: US04372404 (39 worldwide citation)

Cutting teeth for rolling cutter bits, including cutter inserts, cutter teeth formed in place, or formed separately and welded in place, etc., are formed by powder metallurgy as a densified powder metallurgical composite of at least two varying phases, said composite having a substantially continuou ...


9
Percy W Schumacher: Rolling cutter drill bit. Reed Rock Bit Company, Carl A Rowold, April 14, 1987: US04657093 (31 worldwide citation)

This invention discloses a rolling cone drilling bit having a plurality of cutters which have inserted therein hard metal cutting elements preferably formed of tungsten carbide alloy; and in which bit the rolling cone cutters are located in such a manner that their rotational axes are greatly offset ...


10
Robert H Slaughter Jr: Drill bit having replaceable nozzles directing drilling fluid at a predetermined angle. Reed Rock Bit Company, Carl A Rowold, April 15, 1986: US04582149 (30 worldwide citation)

A nozzle system for a rotary drill bit comprising a plurality of elongate nozzle members detachably secured in drilling fluid exit bores in a drill bit body, each nozzle member having passaging therein, the lower portion of which is angled relative to the longitudinal axis of the nozzle member, and ...



Click the thumbnails below to visualize the patent trend.