US3126067A
(en)
*
|
|
1964-03-24 |
|
Roller bit with inserts |
US1306674A
(en)
*
|
|
1919-06-10 |
|
Cornelis j |
US32036A
(en)
*
|
|
1861-04-09 |
|
Hunter dayidson |
US1996322A
(en)
*
|
1931-07-24 |
1935-04-02 |
Anthony E Carlson |
Rock drilling core bit
|
US2014806A
(en)
*
|
1933-03-18 |
1935-09-17 |
Globe Oil Tools Co |
Core catcher
|
US2027700A
(en)
*
|
1933-12-30 |
1936-01-14 |
Phillips Petroleum Co |
Drill cutter
|
US2117481A
(en)
*
|
1935-02-19 |
1938-05-17 |
Globe Oil Tools Co |
Rock core drill head
|
US2121202A
(en)
*
|
1935-03-19 |
1938-06-21 |
Robert J Killgore |
Rotary bit
|
US2081195A
(en)
*
|
1935-06-21 |
1937-05-25 |
Globe Oil Tools Co |
Core recovering tool
|
US2103611A
(en)
*
|
1936-10-13 |
1937-12-28 |
Globe Oil Tools Co |
Core catcher
|
US2123453A
(en)
*
|
1937-08-11 |
1938-07-12 |
Globe Oil Tools Co |
Core drill construction
|
US2358642A
(en)
*
|
1941-11-08 |
1944-09-19 |
Archer W Kammerer |
Rotary drill bit
|
US2412915A
(en)
*
|
1942-06-07 |
1946-12-17 |
Standard Oil Dev Co |
Pressure core barrel
|
US2514586A
(en)
*
|
1946-10-25 |
1950-07-11 |
Lester Callahan |
Apparatus for drilling wells
|
US2470695A
(en)
*
|
1947-11-17 |
1949-05-17 |
Globe Oil Tools Co |
Cone type well drilling bit
|
US2661931A
(en)
*
|
1950-12-04 |
1953-12-08 |
Security Engineering Division |
Hydraulic rotary rock bit
|
US2667334A
(en)
*
|
1951-03-03 |
1954-01-26 |
Standard Oil Dev Co |
Full hole diamond bit
|
US2774571A
(en)
*
|
1954-07-06 |
1956-12-18 |
Hughes Tool Co |
Cone type well drill
|
US2804282A
(en)
*
|
1954-10-11 |
1957-08-27 |
Jr Arthur F Spengler |
Boring drill
|
US2901223A
(en)
*
|
1955-11-30 |
1959-08-25 |
Hughes Tool Co |
Earth boring drill
|
US2893696A
(en)
*
|
1956-06-06 |
1959-07-07 |
Lee R Mcguire |
Rotary, earth trepanning tools
|
US3095053A
(en)
*
|
1960-02-01 |
1963-06-25 |
Jersey Prod Res Co |
Drill bit
|
US3075592A
(en)
*
|
1960-05-31 |
1963-01-29 |
Jersey Prod Res Co |
Drilling device
|
US3100544A
(en)
*
|
1960-05-31 |
1963-08-13 |
Jersey Prod Res Co |
Drilling device
|
US3091300A
(en)
*
|
1960-10-05 |
1963-05-28 |
Dresser Ind |
Drill bit with improved core destroying means
|
US3134447A
(en)
*
|
1962-01-31 |
1964-05-26 |
Hughes Tool Co |
Rolling cone rock bit with wraparound spearpoints
|
US3137355A
(en)
*
|
1962-05-31 |
1964-06-16 |
Reed Roller Bit Co |
Insert bit structure
|
US3174564A
(en)
*
|
1963-06-10 |
1965-03-23 |
Hughes Tool Co |
Combination core bit
|
US3250337A
(en)
*
|
1963-10-29 |
1966-05-10 |
Max J Demo |
Rotary shock wave drill bit
|
US3311181A
(en)
*
|
1964-05-04 |
1967-03-28 |
John B Fowler |
Bi-metal drilling tooth
|
US3389761A
(en)
*
|
1965-12-06 |
1968-06-25 |
Dresser Ind |
Drill bit and inserts therefor
|
US3461983A
(en)
*
|
1967-06-28 |
1969-08-19 |
Dresser Ind |
Cutting tool having hard insert in hole surrounded by hard facing
|
US3739864A
(en)
*
|
1971-08-12 |
1973-06-19 |
Dresser Ind |
Pressure equalizing system for rock bits
|
US3858671A
(en)
*
|
1973-04-23 |
1975-01-07 |
Kennametal Inc |
Excavating tool
|
US3922038A
(en)
*
|
1973-08-10 |
1975-11-25 |
Hughes Tool Co |
Wear resistant boronized surfaces and boronizing methods
|
US4014395A
(en)
*
|
1974-12-05 |
1977-03-29 |
Smith-Williston, Inc. |
Rock drill bit insert retaining sleeve assembly
|
US3948330A
(en)
*
|
1975-02-18 |
1976-04-06 |
Dresser Industries, Inc. |
Vacuum, vacuum-pressure, or pressure reverse circulation bit
|
US3952815A
(en)
*
|
1975-03-24 |
1976-04-27 |
Dresser Industries, Inc. |
Land erosion protection on a rock cutter
|
US4056153A
(en)
*
|
1975-05-29 |
1977-11-01 |
Dresser Industries, Inc. |
Rotary rock bit with multiple row coverage for very hard formations
|
US4006788A
(en)
*
|
1975-06-11 |
1977-02-08 |
Smith International, Inc. |
Diamond cutter rock bit with penetration limiting
|
US4092054A
(en)
*
|
1975-07-24 |
1978-05-30 |
Subterranean Tools Inc. |
Seal arrangement for rolling cutter
|
US4058177A
(en)
*
|
1976-03-29 |
1977-11-15 |
Dresser Industries, Inc. |
Asymmetric gage insert for an earth boring apparatus
|
US4098358A
(en)
*
|
1976-04-22 |
1978-07-04 |
Klima Frank J |
Drill bit with hard-faced bearing surfaces
|
US4102419A
(en)
*
|
1976-05-10 |
1978-07-25 |
Klima Frank J |
Rolling cutter drill bit with annular seal rings
|
US4109737A
(en)
*
|
1976-06-24 |
1978-08-29 |
General Electric Company |
Rotary drill bit
|
US4148368A
(en)
*
|
1976-09-27 |
1979-04-10 |
Smith International, Inc. |
Rock bit with wear resistant inserts
|
DE2706290A1
(de)
*
|
1977-02-15 |
1978-08-17 |
Skf Kugellagerfabriken Gmbh |
Einrichtung zum schmieren der lager von schneidrollen eines rollenmeissels
|
SE7703810L
(sv)
*
|
1977-04-01 |
1978-10-02 |
Sandvik Ab |
Tetningsanordning vid rullborrkronor
|
US4156329A
(en)
*
|
1977-05-13 |
1979-05-29 |
General Electric Company |
Method for fabricating a rotary drill bit and composite compact cutters therefor
|
US4140189A
(en)
*
|
1977-06-06 |
1979-02-20 |
Smith International, Inc. |
Rock bit with diamond reamer to maintain gage
|
AT350490B
(de)
*
|
1977-07-11 |
1979-06-11 |
Voest Ag |
Vorrichtung zur abdichtung des spaltes zwischen relativ zueinander verdrehbaren teilen
|
CA1081686A
(en)
|
1978-05-01 |
1980-07-15 |
Percy W. Schumacher, Jr. |
Drill bit air clearing system
|
DE2841971A1
(de)
*
|
1978-09-27 |
1980-04-10 |
Sandvik Gmbh |
Rollenmeissel mit schneidrollen
|
DE2823698C2
(de)
*
|
1978-05-31 |
1981-09-17 |
Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt |
Rollenmeißel mit einem Einfülloch für Lagerrollen
|
US4176848A
(en)
*
|
1978-06-30 |
1979-12-04 |
Dresser Industries, Inc. |
Rotary bearing seal for drill bits
|
SE416746B
(sv)
*
|
1978-07-11 |
1981-02-02 |
Sandvik Ab |
Anordning for kylning av rullborrkronor
|
US4199856A
(en)
*
|
1978-07-31 |
1980-04-29 |
Dresser Industries, Inc. |
Method of providing lubricant volume displacement system for a rotary rock bit
|
US4183416A
(en)
*
|
1978-08-18 |
1980-01-15 |
Dresser Industries, Inc. |
Cutter actuated rock bit lubrication system
|
DE7826323U1
(de)
*
|
1978-09-05 |
1978-12-14 |
Sandvik Gmbh, 4000 Duesseldorf |
Rollenmeissel
|
US4203496A
(en)
*
|
1978-10-16 |
1980-05-20 |
Smith International, Inc. |
Longitudinal axis roller drill bit with gage inserts protection
|
US4179003A
(en)
*
|
1978-12-21 |
1979-12-18 |
Dresser Industries, Inc. |
Seal for a rolling cone cutter earth boring bit
|
US4531595A
(en)
*
|
1979-01-08 |
1985-07-30 |
Housman Robert J |
Wear resistant composite insert and boring tool with insert
|
SE428139B
(sv)
*
|
1979-03-28 |
1983-06-06 |
Sandvik Ab |
Bergborrkrona
|
US4249622A
(en)
*
|
1979-06-11 |
1981-02-10 |
Dresser Industries, Inc. |
Floating seal for drill bits
|
US4285409A
(en)
*
|
1979-06-28 |
1981-08-25 |
Smith International, Inc. |
Two cone bit with extended diamond cutters
|
US4260203A
(en)
*
|
1979-09-10 |
1981-04-07 |
Smith International, Inc. |
Bearing structure for a rotary rock bit
|
US4279450A
(en)
*
|
1979-10-04 |
1981-07-21 |
Dresser Industries, Inc. |
Rotary rock bit fluid center seal
|
US4253710A
(en)
*
|
1979-10-09 |
1981-03-03 |
Dresser Industries, Inc. |
High temperature sealing system for a rotary rock bit
|
US4265324A
(en)
*
|
1979-11-29 |
1981-05-05 |
Smith International, Inc. |
Eccentric counterbore for diamond insert stud
|
US4301877A
(en)
*
|
1980-03-10 |
1981-11-24 |
Hughes Tool Company |
Clad mud nozzle
|
US4343371A
(en)
*
|
1980-04-28 |
1982-08-10 |
Smith International, Inc. |
Hybrid rock bit
|
US4287957A
(en)
*
|
1980-05-27 |
1981-09-08 |
Evans Robert F |
Cooling a drilling tool component with a separate flow stream of reduced-temperature gaseous drilling fluid
|
US4359335A
(en)
*
|
1980-06-05 |
1982-11-16 |
Smith International, Inc. |
Method of fabrication of rock bit inserts of tungsten carbide (WC) and cobalt (Co) with cutting surface wear pad of relative hardness and body portion of relative toughness sintered as an integral composite
|
USRE32036E
(en)
|
1980-06-11 |
1985-11-26 |
Strata Bit Corporation |
Drill bit
|
US4375242A
(en)
*
|
1980-08-11 |
1983-03-01 |
Hughes Tool Company |
Sealed and lubricated rock bit with air protected seal ring
|
US4386668A
(en)
*
|
1980-09-19 |
1983-06-07 |
Hughes Tool Company |
Sealed lubricated and air cooled rock bit bearing
|
US4386669A
(en)
*
|
1980-12-08 |
1983-06-07 |
Evans Robert F |
Drill bit with yielding support and force applying structure for abrasion cutting elements
|
US4545441A
(en)
*
|
1981-02-25 |
1985-10-08 |
Williamson Kirk E |
Drill bits with polycrystalline diamond cutting elements mounted on serrated supports pressed in drill head
|
US4453836A
(en)
*
|
1981-08-31 |
1984-06-12 |
Klima Frank J |
Sealed hard-rock drill bit
|
US4442909A
(en)
*
|
1981-09-21 |
1984-04-17 |
Strata Bit Corporation |
Drill bit
|
US4421184A
(en)
*
|
1981-12-04 |
1983-12-20 |
Hughes Tool Company |
Rock bit with improved shirttail ventilation
|
US4724913A
(en)
|
1983-02-18 |
1988-02-16 |
Strata Bit Corporation |
Drill bit and improved cutting element
|
US4527644A
(en)
*
|
1983-03-25 |
1985-07-09 |
Allam Farouk M |
Drilling bit
|
US4444281A
(en)
*
|
1983-03-30 |
1984-04-24 |
Reed Rock Bit Company |
Combination drag and roller cutter drill bit
|
US4512426A
(en)
*
|
1983-04-11 |
1985-04-23 |
Christensen, Inc. |
Rotating bits including a plurality of types of preferential cutting elements
|
US4540596A
(en)
*
|
1983-05-06 |
1985-09-10 |
Smith International, Inc. |
Method of producing thin, hard coating
|
SE452636B
(sv)
|
1983-09-20 |
1987-12-07 |
Santrade Ltd |
Bergborrkrona
|
US4515228A
(en)
*
|
1983-11-28 |
1985-05-07 |
Hughes Tool Company - Usa |
Air groove scraper
|
US4595067A
(en)
*
|
1984-01-17 |
1986-06-17 |
Reed Tool Company |
Rotary drill bit, parts therefor, and method of manufacturing thereof
|
US4624329A
(en)
*
|
1984-02-15 |
1986-11-25 |
Varel Manufacturing Company |
Rotating cutter drill set
|
US4533003A
(en)
*
|
1984-03-08 |
1985-08-06 |
A-Z International Company |
Drilling apparatus and cutter therefor
|
US4525178A
(en)
|
1984-04-16 |
1985-06-25 |
Megadiamond Industries, Inc. |
Composite polycrystalline diamond
|
US4602691A
(en)
*
|
1984-06-07 |
1986-07-29 |
Hughes Tool Company |
Diamond drill bit with varied cutting elements
|
US4608226A
(en)
*
|
1984-06-22 |
1986-08-26 |
Norton Christensen, Inc. |
Method of forming a diamond tooth insert for a drill bit and a diamond cutting element formed thereby
|
US4552232A
(en)
*
|
1984-06-29 |
1985-11-12 |
Spiral Drilling Systems, Inc. |
Drill-bit with full offset cutter bodies
|
US4591008A
(en)
*
|
1984-08-22 |
1986-05-27 |
Smith International, Inc. |
Lube reservoir protection for rock bits
|
US4592433A
(en)
*
|
1984-10-04 |
1986-06-03 |
Strata Bit Corporation |
Cutting blank with diamond strips in grooves
|
US4610319A
(en)
*
|
1984-10-15 |
1986-09-09 |
Kalsi Manmohan S |
Hydrodynamic lubricant seal for drill bits
|
US4802539A
(en)
|
1984-12-21 |
1989-02-07 |
Smith International, Inc. |
Polycrystalline diamond bearing system for a roller cone rock bit
|
US4738322A
(en)
|
1984-12-21 |
1988-04-19 |
Smith International Inc. |
Polycrystalline diamond bearing system for a roller cone rock bit
|
GB8432587D0
(en)
|
1984-12-22 |
1985-02-06 |
Nl Petroleum Prod |
Cutting elements for rotary drill bits
|
US4597455A
(en)
*
|
1985-04-03 |
1986-07-01 |
Dresser Industries, Inc. |
Rock bit lubrication system
|
US4593775A
(en)
*
|
1985-04-18 |
1986-06-10 |
Smith International, Inc. |
Two-piece pressure relief valve
|
US4694918A
(en)
*
|
1985-04-29 |
1987-09-22 |
Smith International, Inc. |
Rock bit with diamond tip inserts
|
US4610452A
(en)
*
|
1985-07-08 |
1986-09-09 |
Smith International, Inc. |
Belleville seal for sealed bearing rotary cone rock bits
|
US4784023A
(en)
|
1985-12-05 |
1988-11-15 |
Diamant Boart-Stratabit (Usa) Inc. |
Cutting element having composite formed of cemented carbide substrate and diamond layer and method of making same
|
US4690228A
(en)
*
|
1986-03-14 |
1987-09-01 |
Eastman Christensen Company |
Changeover bit for extended life, varied formations and steady wear
|
US4688651A
(en)
*
|
1986-03-21 |
1987-08-25 |
Dresser Industries, Inc. |
Cone mouth debris exclusion shield
|
GB2188354B
(en)
|
1986-03-27 |
1989-11-22 |
Shell Int Research |
Rotary drill bit
|
US4629338A
(en)
*
|
1986-03-31 |
1986-12-16 |
Dresser Industries, Inc. |
Seal and bearing apparatus for bits
|
US4705124A
(en)
|
1986-08-22 |
1987-11-10 |
Minnesota Mining And Manufacturing Company |
Cutting element with wear resistant crown
|
US4722405A
(en)
|
1986-10-01 |
1988-02-02 |
Dresser Industries, Inc. |
Wear compensating rock bit insert
|
US4744427A
(en)
|
1986-10-16 |
1988-05-17 |
Eastman Christensen Company |
Bit design for a rotating bit incorporating synthetic polycrystalline cutters
|
US4832139A
(en)
|
1987-06-10 |
1989-05-23 |
Smith International, Inc. |
Inclined chisel inserts for rock bits
|
US4865136A
(en)
|
1987-10-05 |
1989-09-12 |
Cummins Engine Company |
Pressure relief valve for roller bit
|
EP0336697B1
(en)
|
1988-04-05 |
1993-11-10 |
Camco Drilling Group Limited |
Cutting element for a rotary drill bit, and method for manufacturing such an element
|
US4813502A
(en)
|
1988-06-28 |
1989-03-21 |
Dresser Industries, Inc. |
Drilling bit with improved trailing edge vent
|
DE68919454T2
(de)
|
1988-08-15 |
1995-04-06 |
De Beers Ind Diamond |
Werkzeugeinsatz.
|
NO169735C
(no)
|
1989-01-26 |
1992-07-29 |
Geir Tandberg |
Kombinasjonsborekrone
|
US4942930A
(en)
|
1989-02-28 |
1990-07-24 |
Cummins Engine Company, Inc. |
Lubrication system for an earth boring drill bit and methods for filling and retrofit installing thereof
|
US4940099A
(en)
|
1989-04-05 |
1990-07-10 |
Reed Tool Company |
Cutting elements for roller cutter drill bits
|
US4976324A
(en)
|
1989-09-22 |
1990-12-11 |
Baker Hughes Incorporated |
Drill bit having diamond film cutting surface
|
US4967854A
(en)
|
1989-10-05 |
1990-11-06 |
Barnetche Gonzalez Eduardo |
Double cone cutting head for a drill bit
|
US5027911A
(en)
|
1989-11-02 |
1991-07-02 |
Dresser Industries, Inc. |
Double seal with lubricant gap between seals for sealed rotary drill bits
|
US4981182A
(en)
|
1990-01-26 |
1991-01-01 |
Dresser Industries, Inc. |
Sealed rotary blast hole drill bit utilizing air pressure for seal protection
|
US4984643A
(en)
|
1990-03-21 |
1991-01-15 |
Hughes Tool Company |
Anti-balling earth boring bit
|
US5154245A
(en)
|
1990-04-19 |
1992-10-13 |
Sandvik Ab |
Diamond rock tools for percussive and rotary crushing rock drilling
|
US5145016B1
(en)
|
1990-04-30 |
1996-08-13 |
Rock Bit International Inc |
Rock bit with reaming rows
|
US5074367A
(en)
|
1990-05-11 |
1991-12-24 |
Rock Bit Industries, Inc. |
Rock bit with improved shank protection
|
EP0467870B1
(en)
|
1990-07-10 |
1995-01-25 |
Smith International, Inc. |
Roller tooth bit with heel row cutter inserts
|
US5080183A
(en)
|
1990-08-13 |
1992-01-14 |
Camco International Inc. |
Seal assembly for roller cutter drill bit having a pressure balanced lubrication system
|
DE69221983D1
(de)
|
1991-10-09 |
1997-10-09 |
Smith International |
Diamant-Schneideinsatz mit einer konvexen Schneidfläche
|
US5287936A
(en)
|
1992-01-31 |
1994-02-22 |
Baker Hughes Incorporated |
Rolling cone bit with shear cutting gage
|
US5346026A
(en)
|
1992-01-31 |
1994-09-13 |
Baker Hughes Incorporated |
Rolling cone bit with shear cutting gage
|
US5341890A
(en)
|
1993-01-08 |
1994-08-30 |
Smith International, Inc. |
Ultra hard insert cutters for heel row rotary cone rock bit applications
|
US5351770A
(en)
|
1993-06-15 |
1994-10-04 |
Smith International, Inc. |
Ultra hard insert cutters for heel row rotary cone rock bit applications
|
US5351768A
(en)
|
1993-07-08 |
1994-10-04 |
Baker Hughes Incorporated |
Earth-boring bit with improved cutting structure
|
US5542485A
(en)
|
1993-07-08 |
1996-08-06 |
Baker Hughes Incorporated |
Earth-boring bit with improved cutting structure
|
US5379854A
(en)
|
1993-08-17 |
1995-01-10 |
Dennis Tool Company |
Cutting element for drill bits
|
US5407022A
(en)
|
1993-11-24 |
1995-04-18 |
Baker Hughes Incorporated |
Free cutting gage insert with relief angle
|