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Patentes

Citada por

Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US410869216 Dic 197622 Ago 1978Smith International, Inc.Rock bit roller cutter and method therefor
US423143810 Oct 19784 Nov 1980Smith International, Inc.Straight hole insert drill bit
US439394929 Dic 198019 Jul 1983Peterson Associates, Ltd.Rock boring apparatus
US455223229 Jun 198412 Nov 1985Spiral Drilling Systems, Inc.Drill-bit with full offset cutter bodies
US457072531 Ene 198418 Feb 1986NL Industries, Inc.Drill bit cutter
US459506717 Ene 198417 Jun 1986Reed Tool CompanyRotary drill bit, parts therefor, and method of manufacturing thereof
US461167321 Nov 198316 Sep 1986Reed Rock Bit CompanyDrill bit having offset roller cutters and improved nozzles
US486932931 Ago 198826 Sep 1989Smith International, Inc.Rock bit insert
US488749313 Jul 198819 Dic 1989Reed Tool CompanyRoller cutter drill bit and method of forming
US520137622 Abr 199213 Abr 1993Dresser Industries, Inc.Rock bit with improved gage insert
US542142322 Mar 19946 Jun 1995Dresser Industries, Inc.Rotary cone drill bit with improved cutter insert
US544523125 Jul 199429 Ago 1995Baker Hughes IncorporatedEarth-burning bit having an improved hard-faced tooth structure
US56974627 Ago 199616 Dic 1997Baker Hughes Inc.Earth-boring bit having improved cutting structure
US57553019 Ago 199626 May 1998Dresser Industries, Inc.Inserts and compacts with lead-in surface for enhanced retention
US595428210 Feb 199721 Sep 1999Plate for reducing wear by a material flow
US737071115 Ago 200513 May 2008Smith International, Inc.Rolling cone drill bit having non-circumferentially arranged cutter elements
US768610428 Sep 200630 Mar 2010Smith International, Inc.Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions
USD27368027 Abr 19811 May 1984Fagersta ABRoller bit

Dibujos