Inventor · disambiguated record
Pingjun Guo
Also filed as: GUO PINGJUN
15 granted patents·3 pending applications·210 citations·filing 2003–2020
93Inventor score
Top patents by PatentIndex Score
18 records- 0192US7365308B2Measurement of formation gas saturation in cased wellbores using pulsed neutron instrumentationBAKER HUGHES INC·Filed 2005·Granted Apr 29, 2008·44 cites·27 claims
- 0289US7205535B2Elemental gamma ray signature instrumentBAKER HUGHES INC·Filed 2004·Granted Apr 17, 2007·42 cites·32 claims
- 0386US9383473B2Method for cement evaluation with neutron logsGUO PINGJUN·Filed 2013·Granted Jul 5, 2016·8 cites·11 claims
- 0484US9057795B2Azimuthal cement density image measurementsGUO PINGJUN·Filed 2014·Granted Jun 16, 2015·9 cites·22 claims
- 0583US7254486B2Method and apparatus for shale bed detection in deviated and horizontal wellboresBAKER HUGHES INC·Filed 2005·Granted Aug 7, 2007·20 cites·17 claims
- 0682US7361887B2Measurement of formation gas pressure in cased wellbores using pulsed neutron instrumentationBAKER HUGHES INC·Filed 2005·Granted Apr 22, 2008·20 cites·26 claims
- 0781US10705246B2Method of rock mineralogy interpretationGUO PINGJUN·Filed 2017·Granted Jul 7, 2020·3 cites·6 claims
- 0877US7372018B2Determination of gas pressure and saturation simultaneouslyBAKER HUGHES INC·Filed 2005·Granted May 13, 2008·14 cites·27 claims
- 0975US7402797B2Method and apparatus for determining aluminum concentration in earth formationsBAKER HUGHES INC·Filed 2005·Granted Jul 22, 2008·12 cites·22 claims
- 1074US7548817B2Formation evaluation using estimated borehole tool positionBAKER HUGHES INC·Filed 2007·Granted Jun 16, 2009·14 cites·19 claims
- 1157US7804060B2Method and apparatus for fluid influx detection while drillingBAKER HUGHES INC·Filed 2006·Granted Sep 28, 2010·8 cites·21 claims
- 1252US7649169B2Method for determining shale bed boundaries and gamma ray activity with gamma ray instrumentBAKER HUGHES INC·Filed 2005·Granted Jan 19, 2010·3 cites·19 claims
- 1352US7282704B2Method for determining formation porosity and gas saturation in a gas reservoirBAKER HUGHES INC·Filed 2004·Granted Oct 16, 2007·12 cites·31 claims
- 1442US11788401B2Systems and methods for characterizing subsurface formation properties through geochemical loggingEXXONMOBIL TECHNOLOGY & ENGINEERING COMPANY·Filed 2020·Granted Oct 17, 2023·0 cites·16 claims
- 1542US8527204B2Volume of investigation based density image processingYIN HEZHU·Filed 2008·Granted Sep 3, 2013·1 cites·22 claims
- 1641US2014052376A1Method for Cement Evaluation with Acoustic and Nuclear Density LogsGUO PINGJUN·Filed 2013·Application pending·0 cites
- 1737US2007241275A1Neutron source for well loggingBAKER HUGHES INC·Filed 2005·Application pending·0 cites
- 1833US2004178337A1Neutron detector for downhole useBAKER HUGHES INC·Filed 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →