Inventor · disambiguated record
David D. Hearn
Also filed as: HEARN DAVID · HEARN DAVID B · HEARN DAVID D · HEARN DAVID DEWITT
30 granted patents·4 pending applications·902 citations·filing 1983–2022
97Inventor score
Files withATLANTIC RICHFIELD CO18CONOCOPHILLIPS CO10HEARN DAVID D3FORD GLOBAL TECH LLC1HEARN DAVID DEWITT1
Top patents by PatentIndex Score
34 records- 0195US10871050B2Nano-thermite well plugCONOCOPHILLIPS CO·Filed 2017·Granted Dec 22, 2020·11 cites·21 claims
- 0295US4744420AWellbore cleanout apparatus and methodATLANTIC RICHFIELD CO·Filed 1987·Granted May 17, 1988·148 cites·17 claims
- 0393US12129735B2Tool for metal plugging or sealing of casingCONOCOPHILLIPS CO·Filed 2022·Granted Oct 29, 2024·3 cites·20 claims
- 0493US10760374B2Tool for metal plugging or sealing of casingCONOCOPHILLIPS CO·Filed 2017·Granted Sep 1, 2020·13 cites·28 claims
- 0591US11377925B2Through tubing P and A with bismuth alloysCONOCOPHILLIPS CO·Filed 2018·Granted Jul 5, 2022·8 cites·24 claims
- 0685US5265675AWell conduit cutting and milling apparatus and methodATLANTIC RICHFIELD CO·Filed 1992·Granted Nov 30, 1993·108 cites·9 claims
- 0781US5195591APermanent whipstock and placement methodATLANTIC RICHFIELD CO·Filed 1991·Granted Mar 23, 1993·75 cites·17 claims
- 0880US12010970B2Nano-thermite well plugCONOCOPHILLIPS CO·Filed 2022·Granted Jun 18, 2024·0 cites·21 claims
- 0974US5794697AMethod for increasing oil production from an oil well producing a mixture of oil and gasATLANTIC RICHFIELD CO·Filed 1996·Granted Aug 18, 1998·70 cites·14 claims
- 1072US4913229ACoupling for releasing tubing strings from downhole toolsATLANTIC RICHFIELD CO·Filed 1988·Granted Apr 3, 1990·43 cites·15 claims
- 1172US4899320ADownhole tool for determining in-situ formation stress orientationATLANTIC RICHFIELD CO·Filed 1988·Granted Feb 6, 1990·47 cites·8 claims
- 1271US6032737AMethod and system for increasing oil production from an oil well producing a mixture of oil and gasATLANTIC RICHFIELD CO·Filed 1998·Granted Mar 7, 2000·58 cites·33 claims
- 1368US4674580AMeans for reducing bending stresses in drill pipeATLANTIC RICHFIELD CO·Filed 1985·Granted Jun 23, 1987·37 cites·4 claims
- 1467US11480026B2Nano-thermite well plugCONOCOPHILLIPS CO·Filed 2020·Granted Oct 25, 2022·0 cites·6 claims
- 1567US5944101AApparatus for milling a window in well tubularATLANTIC RICHFIELD CO·Filed 1998·Granted Aug 31, 1999·49 cites·13 claims
- 1667US4653598ADrainhole drilling assembly with oriented elliptic drill collarATLANTIC RICHFIELD CO·Filed 1984·Granted Mar 31, 1987·31 cites·34 claims
- 1766US12152461B2Through tubing P AND A with bismuth alloysCONOCOPHILLIPS CO·Filed 2022·Granted Nov 26, 2024·0 cites·18 claims
- 1865US8430187B2Directional sidetrack well drilling systemHEARN DAVID D·Filed 2010·Granted Apr 30, 2013·3 cites·14 claims
- 1963US11441384B2Tool for metal plugging or sealing of casingCONOCOPHILLIPS CO·Filed 2020·Granted Sep 13, 2022·0 cites·17 claims
- 2061US4476945ADrainhold drillingATLANTIC RICHFIELD CO·Filed 1983·Granted Oct 16, 1984·26 cites·3 claims
- 2157US6257331B1Downhole setting toolATLANTIC RICHFIELD CO·Filed 1999·Granted Jul 10, 2001·35 cites·14 claims
- 2255US6176327B1Method and toolstring for operating a downhole motorATLANTIC RICHFIELD CO·Filed 1999·Granted Jan 23, 2001·31 cites·16 claims
- 2352US6318480B1Drilling of laterals from a wellboreATLANTIC RICHFIELD CO·Filed 1999·Granted Nov 20, 2001·27 cites·9 claims
- 2451US5725060AMill starting device and methodATLANTIC RICHFIELD CO·Filed 1995·Granted Mar 10, 1998·33 cites·20 claims
- 2551US4762186AMedium curvature directional drilling methodATLANTIC RICHFIELD CO·Filed 1986·Granted Aug 9, 1988·23 cites·5 claims
- 2650US2014328664A1Single circuit double-acting pumpHEARN DAVID DEWITT·Filed 2013·Application pending·0 cites
- 2746US10255810B2Method and system for a motor vehicleFORD GLOBAL TECH LLC·Filed 2018·Granted Apr 9, 2019·0 cites·18 claims
- 2845US2014318763A1System for the continuous circulation of produced fluids from a subterranean formationCONOCOPHILLIPS CO·Filed 2014·Application pending·0 cites
- 2944US4483721AMethod and apparatus for cutting patterns through pipeATLANTIC RICHFIELD CO·Filed 1983·Granted Nov 20, 1984·6 cites·15 claims
- 3043US2003079120A1Web environment access controlFiled 2002·Application pending·0 cites
- 3142US5113703ATubing end locating apparatus for wellboresATLANTIC RICHFIELD CO·Filed 1990·Granted May 19, 1992·15 cites·16 claims
- 3241US8256535B2Mill-through tailpipe liner exit and method of use thereofHEARN DAVID D·Filed 2009·Granted Sep 4, 2012·2 cites·36 claims
- 3339US9371694B2Permanent bypass whipstock assembly for drilling and completing a sidetrack well and preserving access to the original wellboreHEARN DAVID D·Filed 2010·Granted Jun 21, 2016·0 cites·22 claims
- 3431US2016090804A1Reduced flow millingCONOCOPHILLIPS CO·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →