US3126066A
(en)
|
|
1964-03-24 |
|
Rotary drill bit with wiper blade |
USRE23416E
(en)
|
|
1951-10-16 |
|
Drill |
US3126067A
(en)
|
|
1964-03-24 |
|
Roller bit with inserts |
US930759A
(en)
|
1908-11-20 |
1909-08-10 |
Howard R Hughes |
Drill.
|
US1388424A
(en)
|
1919-06-27 |
1921-08-23 |
Edward A George |
Rotary bit
|
US1394769A
(en)
|
1920-05-18 |
1921-10-25 |
C E Reed |
Drill-head for oil-wells
|
US1519641A
(en)
|
1920-10-12 |
1924-12-16 |
Walter N Thompson |
Rotary underreamer
|
US1537550A
(en)
|
1923-01-13 |
1925-05-12 |
Reed Roller Bit Co |
Lubricator for deep-well-drilling apparatus
|
US1729062A
(en)
|
1927-08-15 |
1929-09-24 |
Reed Roller Bit Co |
Roller-cutter mounting
|
US1801720A
(en)
|
1927-11-26 |
1931-04-21 |
Reed Roller Bit Co |
Roller bit
|
US1821474A
(en)
|
1927-12-05 |
1931-09-01 |
Sullivan Machinery Co |
Boring tool
|
US1896243A
(en)
|
1928-04-12 |
1933-02-07 |
Hughes Tool Co |
Cutter support for well drills
|
US1816568A
(en)
|
1929-06-05 |
1931-07-28 |
Reed Roller Bit Co |
Drill bit
|
US1874066A
(en)
|
1930-04-28 |
1932-08-30 |
Floyd L Scott |
Combination rolling and scraping cutter drill
|
US1932487A
(en)
|
1930-07-11 |
1933-10-31 |
Hughes Tool Co |
Combination scraping and rolling cutter drill
|
US1879127A
(en)
|
1930-07-21 |
1932-09-27 |
Hughes Tool Co |
Combination rolling and scraping cutter bit
|
US2030722A
(en)
|
1933-12-01 |
1936-02-11 |
Hughes Tool Co |
Cutter assembly
|
US2117481A
(en)
|
1935-02-19 |
1938-05-17 |
Globe Oil Tools Co |
Rock core drill head
|
US2119618A
(en)
|
1937-08-28 |
1938-06-07 |
John A Zublin |
Oversize hole drilling mechanism
|
US2198849A
(en)
|
1938-06-09 |
1940-04-30 |
Reuben L Waxler |
Drill
|
US2204657A
(en)
|
1938-07-12 |
1940-06-18 |
Brendel Clyde |
Roller bit
|
US2184067A
(en)
|
1939-01-03 |
1939-12-19 |
John A Zublin |
Drill bit
|
US2216894A
(en)
|
1939-10-12 |
1940-10-08 |
Reed Roller Bit Co |
Rock bit
|
US2244537A
(en)
|
1939-12-22 |
1941-06-03 |
Archer W Kammerer |
Well drilling bit
|
US2320136A
(en)
*
|
1940-09-30 |
1943-05-25 |
Archer W Kammerer |
Well drilling bit
|
US2297157A
(en)
|
1940-11-16 |
1942-09-29 |
Mcclinton John |
Drill
|
US2318370A
(en)
|
1940-12-06 |
1943-05-04 |
Kasner M |
Oil well drilling bit
|
US2320137A
(en)
|
1941-08-12 |
1943-05-25 |
Archer W Kammerer |
Rotary drill bit
|
US2358642A
(en)
|
1941-11-08 |
1944-09-19 |
Archer W Kammerer |
Rotary drill bit
|
US2380112A
(en)
|
1942-01-02 |
1945-07-10 |
Kinnear Clarence Wellington |
Drill
|
US2533258A
(en)
|
1945-11-09 |
1950-12-12 |
Hughes Tool Co |
Drill cutter
|
US2533259A
(en)
|
1946-06-28 |
1950-12-12 |
Hughes Tool Co |
Cluster tooth cutter
|
US2520517A
(en)
|
1946-10-25 |
1950-08-29 |
Manley L Natland |
Apparatus for drilling wells
|
US2557302A
(en)
|
1947-12-12 |
1951-06-19 |
Aubrey F Maydew |
Combination drag and rotary drilling bit
|
US2575438A
(en)
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1949-09-28 |
1951-11-20 |
Kennametal Inc |
Percussion drill bit body
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US2628821A
(en)
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1950-10-07 |
1953-02-17 |
Kennametal Inc |
Percussion drill bit body
|
US2661931A
(en)
*
|
1950-12-04 |
1953-12-08 |
Security Engineering Division |
Hydraulic rotary rock bit
|
US2719026A
(en)
*
|
1952-04-28 |
1955-09-27 |
Reed Roller Bit Co |
Earth boring drill
|
US2725215A
(en)
*
|
1953-05-05 |
1955-11-29 |
Donald B Macneir |
Rotary rock drilling tool
|
US2815932A
(en)
|
1956-02-29 |
1957-12-10 |
Norman E Wolfram |
Retractable rock drill bit apparatus
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US2994389A
(en)
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1957-06-07 |
1961-08-01 |
Le Bus Royalty Company |
Combined drilling and reaming apparatus
|
US3066749A
(en)
|
1959-08-10 |
1962-12-04 |
Jersey Prod Res Co |
Combination drill bit
|
US3010708A
(en)
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1960-04-11 |
1961-11-28 |
Goodman Mfg Co |
Rotary mining head and core breaker therefor
|
US3050293A
(en)
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1960-05-12 |
1962-08-21 |
Goodman Mfg Co |
Rotary mining head and core breaker therefor
|
US3055443A
(en)
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1960-05-31 |
1962-09-25 |
Jersey Prod Res Co |
Drill bit
|
US3039503A
(en)
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1960-08-17 |
1962-06-19 |
Nell C Mainone |
Means for mounting cutter blades on a cylindrical cutterhead
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US3239431A
(en)
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1963-02-21 |
1966-03-08 |
Knapp Seth Raymond |
Rotary well bits
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US3174564A
(en)
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1963-06-10 |
1965-03-23 |
Hughes Tool Co |
Combination core bit
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US3250337A
(en)
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1963-10-29 |
1966-05-10 |
Max J Demo |
Rotary shock wave drill bit
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US3269469A
(en)
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1964-01-10 |
1966-08-30 |
Hughes Tool Co |
Solid head rotary-percussion bit with rolling cutters
|
US3397751A
(en)
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1966-03-02 |
1968-08-20 |
Continental Oil Co |
Asymmetric three-cone rock bit
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US3387673A
(en)
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1966-03-15 |
1968-06-11 |
Ingersoll Rand Co |
Rotary percussion gang drill
|
US3424258A
(en)
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1966-11-16 |
1969-01-28 |
Japan Petroleum Dev Corp |
Rotary bit for use in rotary drilling
|
DE1301784B
(de)
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1968-01-27 |
1969-08-28 |
Deutsche Erdoel Ag |
Kombinationsbohrmeissel fuer plastisches Gebirge
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US3583501A
(en)
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1969-03-06 |
1971-06-08 |
Mission Mfg Co |
Rock bit with powered gauge cutter
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(en)
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1970-08-03 |
1975-11-25 |
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Rock drill with increased bearing life
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US3760894A
(en)
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1971-11-10 |
1973-09-25 |
M Pitifer |
Replaceable blade drilling bits
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(en)
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1975-06-11 |
1977-02-08 |
Smith International, Inc. |
Diamond cutter rock bit with penetration limiting
|
JPS5382601A
(en)
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1976-12-28 |
1978-07-21 |
Tokiwa Kogyo Kk |
Rotary grinding type excavation drill head
|
SE7701680L
(sv)
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1977-02-16 |
1978-08-17 |
Skf Ab |
Axiallager for en rulle i en rullborrkrona sw 77 004 sw
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(en)
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1977-05-23 |
1978-08-22 |
Smith International, Inc. |
Raise drill with removable stem
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(en)
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1977-06-06 |
1979-02-20 |
Smith International, Inc. |
Rock bit with diamond reamer to maintain gage
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US4270812A
(en)
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1977-07-08 |
1981-06-02 |
Thomas Robert D |
Drill bit bearing
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1978-05-12 |
1980-02-12 |
Dresser Industries, Inc. |
Varied pitch rotary rock bit
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EP0005945B1
(en)
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1978-05-30 |
1981-08-05 |
Grootcon (U.K.) Limited |
Method of welding metal parts
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US4285409A
(en)
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1979-06-28 |
1981-08-25 |
Smith International, Inc. |
Two cone bit with extended diamond cutters
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US4260203A
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1979-09-10 |
1981-04-07 |
Smith International, Inc. |
Bearing structure for a rotary rock bit
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US4527637A
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1981-05-11 |
1985-07-09 |
Bodine Albert G |
Cycloidal drill bit
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US4293048A
(en)
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1980-01-25 |
1981-10-06 |
Smith International, Inc. |
Jet dual bit
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(en)
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1980-04-24 |
1983-10-11 |
Munson Beauford E |
Roller cone drill bit
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(en)
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1980-04-28 |
1982-08-10 |
Smith International, Inc. |
Hybrid rock bit
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US4369849A
(en)
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1980-06-05 |
1983-01-25 |
Reed Rock Bit Company |
Large diameter oil well drilling bit
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(en)
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1980-06-19 |
1982-11-16 |
Smith International, Inc. |
Hybrid diamond insert platform locator and retention method
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US4320808A
(en)
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1980-06-24 |
1982-03-23 |
Garrett Wylie P |
Rotary drill bit
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(en)
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1980-12-08 |
1983-06-07 |
Evans Robert F |
Drill bit with yielding support and force applying structure for abrasion cutting elements
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1980-12-10 |
1982-11-16 |
Robbins Machine, Inc. |
Raise drill bit inboard cutter assembly
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(en)
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1981-05-11 |
1984-01-31 |
Hughes Tool Company |
Floating seal for earth boring bit
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1981-05-18 |
1984-06-26 |
Smith International, Inc. |
Expandable rock bit
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US4468138A
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1981-09-28 |
1984-08-28 |
Maurer Engineering Inc. |
Manufacture of diamond bearings
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1981-10-27 |
1984-05-15 |
Hitachi Construction Machinery Co., Ltd. |
Cutter head for pit-boring machine
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1981-12-15 |
1986-09-29 |
Santrade Ltd |
Bergborrkrona och sett att tillverka denna
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1982-04-22 |
1983-10-18 |
Smith International, Inc. |
Composite floating element thrust bearing
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1983-03-25 |
1985-07-09 |
Allam Farouk M |
Drilling bit
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*
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1983-03-30 |
1984-04-24 |
Reed Rock Bit Company |
Combination drag and roller cutter drill bit
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WO1985002223A1
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1983-11-18 |
1985-05-23 |
Rock Bit Industries U.S.A., Inc. |
Hybrid rock bit
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US5028177A
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1984-03-26 |
1991-07-02 |
Eastman Christensen Company |
Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks
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AU3946885A
(en)
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1984-03-26 |
1985-10-03 |
Norton Christensen Inc. |
Cutting element using polycrystalline diamond disks
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1984-03-26 |
1988-02-23 |
Eastman Christensen Co. |
Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks
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1984-04-16 |
1985-06-25 |
Megadiamond Industries, Inc. |
Composite polycrystalline diamond
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SE457656B
(sv)
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1984-06-18 |
1989-01-16 |
Santrade Ltd |
Borrkrona innefattande en roterande skaerrulle och borrhuvud innefattande saadan borrkrona
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1984-07-19 |
1991-02-12 |
Reed Tool Company, Ltd. |
Rotary drill bit for use in drilling holes in subsurface earth formations
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1984-12-07 |
1986-02-25 |
Dorosz Dennis D E |
Journal bushing drill bit construction
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1984-12-21 |
1988-04-19 |
Smith International Inc. |
Polycrystalline diamond bearing system for a roller cone rock bit
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1984-12-21 |
1989-02-07 |
Smith International, Inc. |
Polycrystalline diamond bearing system for a roller cone rock bit
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1985-02-25 |
1986-07-15 |
Hughes Tool Company |
Earth boring bit with bearing sleeve
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(en)
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1985-05-06 |
1987-04-14 |
Robert Higdon |
Drill bits with cone retention means
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SU1331988A1
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1985-07-12 |
1987-08-23 |
И.И. Барабашкин, И. В. Воевидко и В. М. Ивасив |
Калибратор
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1985-07-30 |
1987-05-12 |
Sii Megadiamond, Inc. |
Infiltrated thermally stable polycrystalline diamond
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GB8528894D0
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1985-11-23 |
1986-01-02 |
Nl Petroleum Prod |
Rotary drill bits
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1986-03-14 |
1987-09-01 |
Eastman Christensen Company |
Changeover bit for extended life, varied formations and steady wear
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1986-08-11 |
1987-11-17 |
Four E Inc. |
Drill bit assembly
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1986-08-13 |
1989-09-12 |
Drilex Systems, Inc. |
Drilling apparatus and cutter
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1986-08-13 |
1990-05-16 |
A Z Int Tool Co |
Drilling apparatus and cutter
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1986-10-20 |
1990-07-24 |
Norton Company |
Low pressure bonding of PCD bodies and method for drill bits and the like
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1986-10-20 |
1992-05-26 |
Norton Company |
Method for low pressure bonding of PCD bodies
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1986-10-20 |
1991-07-09 |
Norton Company |
Low pressure bonding of PCD bodies and method
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(en)
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1986-11-05 |
1988-03-01 |
Hughes Tool Company |
Compensator for earth boring bits
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DE3709836C1
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1987-03-25 |
1988-09-29 |
Eastman Christensen Co |
Gleitlager fuer Tiefbohrwerkzeuge
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(en)
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1987-06-01 |
1988-08-23 |
Bob Higdon |
Method of assembling drill bits and product assembled thereby
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(en)
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1987-07-08 |
1988-08-16 |
Varel Manufacturing Company |
Asymmetrical rotary cone bit
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1987-07-24 |
1988-07-12 |
Smith International, Inc. |
Diamond bearing for high-speed drag bits
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1987-08-24 |
1989-05-02 |
Rives Allen K |
Arrangement for reducing seal damage between rotatable and stationary members
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1987-12-14 |
1990-06-19 |
Jerome Labrosse |
Tubing bit opener
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1988-05-23 |
1989-04-11 |
Verle L. Rice |
Blade mount for planar head
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1988-06-27 |
2001-11-20 |
The Charles Machine Works, Inc. |
Directional multi-blade boring head
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1988-07-06 |
1991-07-02 |
Baker Hughes Incorporated |
Drill bit having improved cutter configuration
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1988-07-21 |
1989-10-17 |
Cummins Engine Company, Inc. |
Method and apparatus for retaining roller cone of drill bit
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1988-09-19 |
1989-10-24 |
Dresser Industries, Inc. |
Roller drill bit having radial-thrust pilot bushing incorporating anti-galling material
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1988-11-21 |
1991-01-01 |
Smith International, Inc. |
Diamond drag bit for soft formations
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1988-11-21 |
1989-11-14 |
Varel Manufacturing Company |
Rotary drill bit locking mechanism
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1988-11-29 |
1990-01-09 |
Exxon Production Research Company |
Kerf-cutting apparatus and method for improved drilling rates
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1989-01-26 |
1992-07-29 |
Geir Tandberg |
Kombinasjonsborekrone
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GB8907618D0
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1989-04-05 |
1989-05-17 |
Morrison Pumps Sa |
Drilling
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1989-04-10 |
1990-06-12 |
Amoco Corporation |
Whirl resistant bit
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(en)
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1989-04-27 |
1990-09-04 |
Hughes Tool Company |
Two cone bit with non-opposite cones
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1989-07-07 |
1990-06-26 |
Cledisc International B.V. |
Rotary drilling device
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(en)
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1989-09-22 |
1990-12-11 |
Baker Hughes Incorporated |
Drill bit having diamond film cutting surface
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1990-01-05 |
1991-09-17 |
Norton Company |
Multilayer coated abrasive element for bonding to a backing
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1990-03-13 |
1991-02-12 |
Camco International Inc. |
Means for mounting a roller cutter on a drill bit
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1990-03-21 |
1991-01-15 |
Hughes Tool Company |
Anti-balling earth boring bit
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1990-06-04 |
1991-07-02 |
Wilson Steve B |
Pilot casing mill
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1990-10-30 |
1993-04-06 |
Modular Engineering |
Modular drill bit
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1990-10-30 |
1992-08-11 |
Modular Engineering |
Modular drill bit
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1990-10-30 |
1993-07-06 |
Modular Engineering |
Modular drill bit
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1990-11-29 |
1991-08-06 |
Smith International, Inc. |
Bearing structure for downhole motors
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1991-01-07 |
1992-09-08 |
Exxon Production Research Company |
Kerf-cutting apparatus for increased drilling rates
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1991-06-04 |
1992-03-03 |
Anadrill, Inc. |
Diamond thrust bearing and method for manufacturing same
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1991-10-21 |
1999-08-24 |
The Charles Machine Works, Inc. |
Directional boring head with blade assembly
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1991-11-22 |
1993-10-19 |
Anadrill, Inc. |
High performance bearing pad for thrust bearing
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1992-01-06 |
1993-08-24 |
Baker Hughes Incorporated |
Mosaic diamond drag bit cutter having a nonuniform wear pattern
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1992-01-31 |
1995-11-21 |
Baker Hughes Incorporated |
Fixed cutter bit with shear cutting gage
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1992-01-31 |
1994-09-13 |
Baker Hughes Incorporated |
Rolling cone bit with shear cutting gage
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1992-01-31 |
1994-02-22 |
Baker Hughes Incorporated |
Rolling cone bit with shear cutting gage
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1992-02-17 |
1995-04-19 |
Kverneland Klepp As |
Anordning ved borekroner
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1992-03-30 |
1994-08-30 |
Dennis Tool Company |
Bearing assembly with sidewall-brazed PCD plugs
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EP0569663A1
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1992-05-15 |
1993-11-18 |
Baker Hughes Incorporated |
Improved anti-whirl drill bit
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CN2141835Y
(zh)
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1992-10-16 |
1993-09-08 |
赵升吉 |
混合型多刮刀钻头
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1992-12-23 |
1996-09-24 |
Baroid Technology, Inc. |
Method and apparatus for improving drill bit stability
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(en)
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1993-01-21 |
1994-03-01 |
Marvin Gearhart |
Roller cone core bit with spiral stabilizers
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(en)
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1993-02-12 |
1994-11-08 |
Baker Hughes Incorporated |
Expandable gage bit for drilling and method of drilling
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(en)
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1993-02-12 |
1996-10-01 |
Baker Hughes Incorporated |
Bit for subterranean drilling fabricated from separately-formed major components
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(en)
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1993-04-16 |
2000-04-04 |
Baker Hughes Incorporated |
Earth-boring bit with improved rigid face seal
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1997-09-03 |
2000-05-30 |
Baker Hughes Incorporated |
Diamond enhanced bearing for earth-boring bit
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1993-04-16 |
2001-04-03 |
Baker Hughes Incorporated |
Earth-boring bit with improved rigid face seal
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1993-04-26 |
1994-10-18 |
Amerock Corporation |
Hinge for inset doors
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1993-06-15 |
1994-10-04 |
Smith International, Inc. |
Ultra hard insert cutters for heel row rotary cone rock bit applications
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GB9314954D0
(en)
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1993-07-16 |
1993-09-01 |
Camco Drilling Group Ltd |
Improvements in or relating to torary drill bits
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1994-03-31 |
1995-07-04 |
Dresser Industries, Inc. |
Rotary drill bit with improved cutter
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