Inventor · disambiguated record
Darwin V. Ellis
Also filed as: ELLIS DARWIN · ELLIS DARWIN V
15 granted patents·427 citations·filing 1976–2012
94Inventor score
Top patents by PatentIndex Score
15 records- 0197US4048495ADoubly-compensated dual-detector density logging apparatusSCHLUMBERGER TECHNOLOGY CORP·Filed 1976·Granted Sep 13, 1977·101 cites·18 claims
- 0295US4423323ANeutron logging method and apparatus for determining a formation characteristic free of environmental effectsSCHLUMBERGER TECHNOLOGY CORP·Filed 1981·Granted Dec 27, 1983·88 cites·49 claims
- 0388US8521435B2Estimating sigma log beyond the measurements pointsMINH CHANH CAO·Filed 2010·Granted Aug 27, 2013·11 cites·16 claims
- 0486US4810876ALogging apparatus and method for determining absolute elemental concentrations of subsurface formationsSCHLUMBERGER TECHNOLOGY CORP·Filed 1986·Granted Mar 7, 1989·63 cites·81 claims
- 0580US5390115ACompensated gamma-gamma density sonde using three detectorsSCHLUMBERGER TECHNOLOGY CORP·Filed 1993·Granted Feb 14, 1995·57 cites·8 claims
- 0673US7902496B2Method of determining petro-physical information with high energy gamma raysSCHLUMBERGER TECHNOLOGY CORP·Filed 2008·Granted Mar 8, 2011·11 cites·25 claims
- 0771US7279677B2Measuring wellbore diameter with an LWD instrument using compton and photoelectric effectsSCHLUMBERGER TECHNOLOGY CORP·Filed 2005·Granted Oct 9, 2007·18 cites·14 claims
- 0865US7292942B2Measuring formation density through casingSCHLUMBERGER TECHNOLOGY CORP·Filed 2004·Granted Nov 6, 2007·28 cites·19 claims
- 0957US10422920B2Formation characterization for fast forward neutron modelsELLIS DARWIN V·Filed 2012·Granted Sep 24, 2019·2 cites·20 claims
- 1049US8063356B1Method of extracting formation density and Pe using a pulsed accelerator based litho-density toolZHOU TONG·Filed 2007·Granted Nov 22, 2011·2 cites·46 claims
- 1148US4542292ACorrection of natural gamma radiation logs for the effects of gamma ray emission from and attenuation by the borehole fluidSCHLUMBERGER TECHNOLOGY CORP·Filed 1982·Granted Sep 17, 1985·12 cites·37 claims
- 1244US7112783B2Neutron measurement method for determining porosity of a formation surrounding a boreholeSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Sep 26, 2006·7 cites·36 claims
- 1344US4816674ADetermining a formation porosity from neutron logging informationSCHLUMBERGER TECHNOLOGY CORP·Filed 1987·Granted Mar 28, 1989·12 cites·20 claims
- 1440US4645927AClay type and volume evaluationSCHLUMBERGER TECHNOLOGY CORP·Filed 1985·Granted Feb 24, 1987·9 cites·22 claims
- 1537US6552334B2Wellbore caliper measurement method using measurements from a gamma-gamma densitySCHLUMBERGER TECHNOLOGY CORP·Filed 2001·Granted Apr 22, 2003·6 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →