Assignee
EASTMAN CHRISTENSEN CO
US·42 granted patents·3,244 citations·filing 1984–1991
Top patents by PatentIndex Score
42 records- 0198US4913247ADrill bit having improved cutter configurationEASTMAN CHRISTENSEN CO·Filed 1988·Granted Apr 3, 1990·330 cites·20 claims
- 0298US4884477ARotary drill bit with abrasion and erosion resistant facingEASTMAN CHRISTENSEN CO·Filed 1988·Granted Dec 5, 1989·296 cites·41 claims
- 0397US4726718AMulti-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disksEASTMAN CHRISTENSEN CO·Filed 1985·Granted Feb 23, 1988·286 cites·5 claims
- 0496US4919013APreformed elements for a rotary drill bitEASTMAN CHRISTENSEN CO·Filed 1988·Granted Apr 24, 1990·147 cites·19 claims
- 0595US5205684AMulti-component cutting element using consolidated rod-like polycrystalline diamondEASTMAN CHRISTENSEN CO·Filed 1989·Granted Apr 27, 1993·183 cites·10 claims
- 0694US5090491AEarth boring drill bit with matrix displacing materialEASTMAN CHRISTENSEN CO·Filed 1991·Granted Feb 25, 1992·190 cites·15 claims
- 0793US5028177AMulti-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disksEASTMAN CHRISTENSEN CO·Filed 1989·Granted Jul 2, 1991·135 cites·12 claims
- 0893US4768286APrinted circuit packaging for high vibration and temperature environmentsEASTMAN CHRISTENSEN CO·Filed 1986·Granted Sep 6, 1988·85 cites·4 claims
- 0991US4953595AMud pulse valve and method of valving in a mud flow for sharper rise and fall times, faster data pulse rates, and longer lifetime of the mud pulse valveEASTMAN CHRISTENSEN CO·Filed 1989·Granted Sep 4, 1990·108 cites·8 claims
- 1087US4877096AReplaceable cutter using internal ductile metal receptaclesEASTMAN CHRISTENSEN CO·Filed 1989·Granted Oct 31, 1989·76 cites·12 claims
- 1187US4854403AStabilizer for deep well drilling toolsEASTMAN CHRISTENSEN CO·Filed 1988·Granted Aug 8, 1989·94 cites·18 claims
- 1287US4771408AUniversal mud pulse telemetry systemEASTMAN CHRISTENSEN CO·Filed 1987·Granted Sep 13, 1988·80 cites·10 claims
- 1387US4690228AChangeover bit for extended life, varied formations and steady wearEASTMAN CHRISTENSEN CO·Filed 1986·Granted Sep 1, 1987·111 cites·21 claims
- 1486US4883132ADrag bit for drilling in plastic formation with maximum chip clearance and hydraulic for direct chip impingementEASTMAN CHRISTENSEN CO·Filed 1988·Granted Nov 28, 1989·74 cites·19 claims
- 1581US5004057ADrill bit with improved steerabilityEASTMAN CHRISTENSEN CO·Filed 1989·Granted Apr 2, 1991·60 cites·6 claims
- 1681US4716974AMethod and apparatus for coring with an in situ core barrel spongeEASTMAN CHRISTENSEN CO·Filed 1986·Granted Jan 5, 1988·64 cites·20 claims
- 1780US4763258AMethod and apparatus for trelemetry while drilling by changing drill string rotation angle or speedEASTMAN CHRISTENSEN CO·Filed 1986·Granted Aug 9, 1988·69 cites·20 claims
- 1880US4739842AApparatus for optional straight or directional drilling underground formationsEASTMAN CHRISTENSEN CO·Filed 1986·Granted Apr 26, 1988·55 cites·33 claims
- 1979US4901804AArticulated downhole surveying instrument assemblyEASTMAN CHRISTENSEN CO·Filed 1988·Granted Feb 20, 1990·64 cites·16 claims
- 2079US4869330AApparatus for establishing hydraulic flow regime in drill bitsEASTMAN CHRISTENSEN CO·Filed 1988·Granted Sep 26, 1989·51 cites·32 claims
- 2178US4955438ACore drilling toolEASTMAN CHRISTENSEN CO·Filed 1989·Granted Sep 11, 1990·63 cites·11 claims
- 2275US4913244ALarge compact cutter rotary drill bit utilizing directed hydraulics for each cutterEASTMAN CHRISTENSEN CO·Filed 1988·Granted Apr 3, 1990·50 cites·33 claims
- 2375US4673044AEarth boring bit for soft to hard formationsEASTMAN CHRISTENSEN CO·Filed 1985·Granted Jun 16, 1987·61 cites·22 claims
- 2474USD307279SCutting tooth for a rotating drag bitEASTMAN CHRISTENSEN CO·Filed 1986·Granted Apr 17, 1990·18 cites·1 claims
- 2572US4901290AApparatus for the generation of pressure pulses in drilling mud compositionsEASTMAN CHRISTENSEN CO·Filed 1988·Granted Feb 13, 1990·45 cites·11 claims
- 2672US4729438AStabilizer for navigational drillingEASTMAN CHRISTENSEN CO·Filed 1986·Granted Mar 8, 1988·58 cites·17 claims
- 2772US4698794ADevice for remote transmission of informationEASTMAN CHRISTENSEN CO·Filed 1985·Granted Oct 6, 1987·47 cites·7 claims
- 2870US4875531ACore drilling tool with direct driveEASTMAN CHRISTENSEN CO·Filed 1988·Granted Oct 24, 1989·42 cites·8 claims
- 2967US4742498APilot operated mud pulse valve and method of operating the sameEASTMAN CHRISTENSEN CO·Filed 1986·Granted May 3, 1988·54 cites·12 claims
- 3065US4703461AUniversal mud pulse telemetry systemEASTMAN CHRISTENSEN CO·Filed 1986·Granted Oct 27, 1987·35 cites·14 claims
- 3164US4773489ACore drilling tool for boreholes in rockEASTMAN CHRISTENSEN CO·Filed 1987·Granted Sep 27, 1988·34 cites·18 claims
- 3258US4872519ADrill string drill collarsEASTMAN CHRISTENSEN CO·Filed 1988·Granted Oct 10, 1989·24 cites·9 claims
- 3358US4651835ACore catcher for use with an hydraulically displaced inner tube in a coring toolEASTMAN CHRISTENSEN CO·Filed 1984·Granted Mar 24, 1987·24 cites·15 claims
- 3456US5099931AMethod and apparatus for optional straight hole drilling or directional drilling in earth formationsEASTMAN CHRISTENSEN CO·Filed 1991·Granted Mar 31, 1992·29 cites·10 claims
- 3551US4905778ADevice for producing pressure pulses in an oil well fluid mediumEASTMAN CHRISTENSEN CO·Filed 1988·Granted Mar 6, 1990·21 cites·9 claims
- 3651US4878548ANozzle retention system for a drill bitEASTMAN CHRISTENSEN CO·Filed 1988·Granted Nov 7, 1989·23 cites·16 claims
- 3744US4854401ADrill bit direct drive for deep well drilling toolsEASTMAN CHRISTENSEN CO·Filed 1988·Granted Aug 8, 1989·11 cites·19 claims
- 3840US4873522AMethod for transmitting downhole data in a reduced timeEASTMAN CHRISTENSEN CO·Filed 1987·Granted Oct 10, 1989·12 cites·18 claims
- 3937US4883136ALarge compact cutter rotary drill bit utilizing directed hydraulics for each cutterEASTMAN CHRISTENSEN CO·Filed 1988·Granted Nov 28, 1989·10 cites·12 claims
- 4036US4694917AMechanical jarring devices for use in drillingEASTMAN CHRISTENSEN CO·Filed 1986·Granted Sep 22, 1987·11 cites·11 claims
- 4131US4744427ABit design for a rotating bit incorporating synthetic polycrystalline cuttersEASTMAN CHRISTENSEN CO·Filed 1986·Granted May 17, 1988·6 cites·16 claims
- 4230US4697653ADiamond setting in a cutting tooth in a drill bit with an increased effective diamond widthEASTMAN CHRISTENSEN CO·Filed 1986·Granted Oct 6, 1987·8 cites·16 claims
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