Inventor · disambiguated record
Richard A. Rosthal
Also filed as: ROSTHAL RICHARD · ROSTHAL RICHARD A
39 granted patents·1 pending application·2,379 citations·filing 1987–2015
99Inventor score
Top patents by PatentIndex Score
40 records- 0197US6297639B1Method and apparatus for directional well logging with a shield having sloped slotsSCHLUMBERGER TECHNOLOGY CORP·Filed 1999·Granted Oct 2, 2001·213 cites·36 claims
- 0297US5200705ADipmeter apparatus and method using transducer array having longitudinally spaced transducersSCHLUMBERGER TECHNOLOGY CORP·Filed 1991·Granted Apr 6, 1993·182 cites·86 claims
- 0397US5157605AInduction logging method and apparatus including means for combining on-phase and quadrature components of signals received at varying frequencies and including use of multiple receiver means associated with a single transmitterSCHLUMBERGER TECHNOLOGY CORP·Filed 1987·Granted Oct 20, 1992·212 cites·22 claims
- 0496US6566881B2Shielding method and apparatus using transverse slotsSCHLUMBERGER TECHNOLOGY CORP·Filed 2000·Granted May 20, 2003·126 cites·38 claims
- 0596US5339037AApparatus and method for determining the resistivity of earth formationsSCHLUMBERGER TECHNOLOGY CORP·Filed 1992·Granted Aug 16, 1994·183 cites·42 claims
- 0695US6969994B2Directional electromagnetic measurements insensitive to dip and anisotropySCHLUMBERGER TECHNOLOGY CORP·Filed 2002·Granted Nov 29, 2005·106 cites·75 claims
- 0795US6573722B2Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipoleSCHLUMBERGER TECHNOLOGY CORP·Filed 2000·Granted Jun 3, 2003·88 cites·9 claims
- 0895US6304086B1Method and apparatus for evaluating the resistivity of formations with high dip angles or high-contrast thin layersSCHLUMBERGER TECHNOLOGY CORP·Filed 1999·Granted Oct 16, 2001·162 cites·48 claims
- 0994US5329448AMethod and apparatus for determining horizontal conductivity and vertical conductivity of earth formationsSCHLUMBERGER TECHNOLOGY CORP·Filed 1991·Granted Jul 12, 1994·118 cites·49 claims
- 1093US9035657B2Electromagnetic logging between a cased borehole and surfaceZHANG HONG·Filed 2010·Granted May 19, 2015·16 cites·27 claims
- 1193US8958989B2Method and apparatus for removal of the double indication of defects in remote eddy current inspection of pipesLEGENDRE EMMANUEL·Filed 2010·Granted Feb 17, 2015·22 cites·12 claims
- 1292US7536261B2Anti-symmetrized electromagnetic measurementsSCHLUMBERGER TECHNOLOGY CORP·Filed 2006·Granted May 19, 2009·33 cites·13 claims
- 1392US6690170B2Antenna structures for electromagnetic well logging toolsSCHLUMBERGER TECHNOLOGY CORP·Filed 2002·Granted Feb 10, 2004·99 cites·69 claims
- 1491US6680613B2Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipoleSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Jan 20, 2004·56 cites·8 claims
- 1591US6351127B1Shielding method and apparatus for selective attenuation of an electromagnetic energy field componentSCHLUMBERGER TECHNOLOGY CORP·Filed 1999·Granted Feb 26, 2002·91 cites·22 claims
- 1690US8362780B2Induction coil impedance modeling using equivalent circuit parametersSCHLUMBERGER TECHNOLOGY CORP·Filed 2009·Granted Jan 29, 2013·20 cites·27 claims
- 1787US6373254B1Method and apparatus for controlling the effect of contact impedance on a galvanic tool in a logging-while-drilling applicationSCHLUMBERGER TECHNOLOGY CORP·Filed 1999·Granted Apr 16, 2002·96 cites·22 claims
- 1886US9069097B2Surface to borehole electromagnetic surveying using metallic well casings as electrodesZHANG HONG·Filed 2009·Granted Jun 30, 2015·21 cites·37 claims
- 1985US7795872B2Determining correction factors representing effects of different portions of a lining structureSCHLUMBERGER TECHNOLOGY CORP·Filed 2007·Granted Sep 14, 2010·19 cites·22 claims
- 2085US6557794B2Coil shielding method for selective attenuation of an electromagnetic energy field componentSCHLUMBERGER TECHNOLOGY CORP·Filed 2001·Granted May 6, 2003·42 cites·11 claims
- 2184US6624634B2Borehole current correction methods and apparatusSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Sep 23, 2003·38 cites·14 claims
- 2284US6380744B2Shielding apparatus for selective attenuation of an electromagnetic energy field componentSCHLUMBERGER TECHNOLOGY CORP·Filed 2001·Granted Apr 30, 2002·42 cites·17 claims
- 2384US5463320AApparatus and method for determining the resitivity of underground formations surrounding a boreholeSCHLUMBERGER TECHNOLOGY CORP·Filed 1994·Granted Oct 31, 1995·65 cites·18 claims
- 2482US8638103B2Electromagnetic logging between borehole and surfaceROSTHAL RICHARD·Filed 2009·Granted Jan 28, 2014·21 cites·14 claims
- 2581US6710601B2Borehole current correction for tilted or transverse magnetic dipoles on conductive supportsSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Mar 23, 2004·33 cites·19 claims
- 2681US6630830B2Shielding method and apparatus using flexible stripSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Oct 7, 2003·30 cites·18 claims
- 2780US8332191B2Correction factors for electromagnetic measurements made through conductive materialROSTHAL RICHARD A·Filed 2009·Granted Dec 11, 2012·20 cites·25 claims
- 2880US6693430B2Passive, active and semi-active cancellation of borehole effects for well loggingSCHLUMBERGER TECHNOLOGY CORP·Filed 2002·Granted Feb 17, 2004·43 cites·27 claims
- 2977US7091877B2Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasionSCHLUMBERGER TECHNOLOGY CORP·Filed 2004·Granted Aug 15, 2006·30 cites·6 claims
- 3076US7212173B2Flex (or printed) circuit axial coils for a downhole logging toolSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted May 1, 2007·34 cites·23 claims
- 3175US9476857B2Method and apparatus for removal of the double indication of defects in remote eddy current inspection of pipesSCHLUMBERGER TECHNOLOGY CORP·Filed 2015·Granted Oct 25, 2016·2 cites·18 claims
- 3273US7414391B2Electromagnetic logging tool calibration systemSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Aug 19, 2008·31 cites·35 claims
- 3372US8614578B2Attenuation of electromagnetic signals passing through conductive materialGAO GUOZHONG·Filed 2009·Granted Dec 24, 2013·11 cites·21 claims
- 3471US6933726B2Apparatus and methods for reducing borehole current effectsSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Aug 23, 2005·29 cites·12 claims
- 3567US7619540B2Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasionSCHLUMBERGER TECHNOLOGY CORP·Filed 2006·Granted Nov 17, 2009·9 cites·29 claims
- 3666US6937021B2Method and apparatus for determining the presence and orientation of a fraction in an earth formationSCHLUMBERGER TECHNOLOGY CORP·Filed 2002·Granted Aug 30, 2005·23 cites·31 claims
- 3761US8326539B2Characterizing at least one property of a liner that lines a wellMORRISON FRANK·Filed 2008·Granted Dec 4, 2012·7 cites·21 claims
- 3860US8310239B2Detecting electrical current in a magnetic structureZHANG HONG·Filed 2009·Granted Nov 13, 2012·4 cites·26 claims
- 3947US2010308832A1Determining Correction Factors Representing Effects of Different Portions of a Lining StructureCLARK BRIAN·Filed 2010·Application pending·0 cites
- 4043US8704523B2Measuring casing attenuation coefficient for electro-magnetics measurementsLEVESQUE CYRILLE·Filed 2009·Granted Apr 22, 2014·2 cites·26 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →