Inventor · disambiguated record
Raghu Madhavan
Also filed as: MADHAVAN RAGHU
29 granted patents·5 pending applications·1,454 citations·filing 1995–2015
98Inventor score
Files withSCHLUMBERGER TECHNOLOGY CORP13INTELLISERV LLC6MADHAVAN RAGHU5HACHE JEAN-MICHEL2HUTIN REMI2
Top patents by PatentIndex Score
34 records- 0198US6641434B2Wired pipe joint with current-loop inductive couplersSCHLUMBERGER TECHNOLOGY CORP·Filed 2002·Granted Nov 4, 2003·289 cites·43 claims
- 0297US6304686B1Methods and apparatus for measuring differential pressure with fiber optic sensor systemsSCHLUMBERGER TECHNOLOGY CORP·Filed 2000·Granted Oct 16, 2001·78 cites·24 claims
- 0396US7913773B2Bidirectional drill string telemetry for measuring and drilling controlSCHLUMBERGER TECHNOLOGY CORP·Filed 2006·Granted Mar 29, 2011·85 cites·25 claims
- 0496US7817062B1Surface communication apparatus and method for use with drill string telemetryINTELLISERV LLC·Filed 2010·Granted Oct 19, 2010·123 cites·12 claims
- 0596US6866306B2Low-loss inductive couplers for use in wired pipe stringsSCHLUMBERGER TECHNOLOGY CORP·Filed 2001·Granted Mar 15, 2005·208 cites·10 claims
- 0694US8164476B2Wellbore telemetry system and methodHACHE JEAN-MICHEL·Filed 2010·Granted Apr 24, 2012·26 cites·23 claims
- 0793US6315050B2PackerSCHLUMBERGER TECHNOLOGY CORP·Filed 2000·Granted Nov 13, 2001·116 cites·4 claims
- 0892US7413021B2Method and conduit for transmitting signalsSCHLUMBERGER TECHNOLOGY CORP·Filed 2005·Granted Aug 19, 2008·49 cites·28 claims
- 0992US6898339B2Multiple mode pre-loadable fiber optic pressure and temperature sensorSCHLUMBERGER TECHNOLOGY CORP·Filed 2002·Granted May 24, 2005·55 cites·26 claims
- 1091US9121962B2Method and conduit for transmitting signalsINTELLISERV LLC·Filed 2012·Granted Sep 1, 2015·11 cites·6 claims
- 1191US6218661B1Methods and apparatus for mechanically enhancing the sensitivity of transversely loaded fiber optic sensorsSCHLUMBERGER TECHNOLOGY CORP·Filed 1998·Granted Apr 17, 2001·100 cites·32 claims
- 1288US7040415B2Downhole telemetry system and methodSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted May 9, 2006·81 cites·60 claims
- 1386US6246048B1Methods and apparatus for mechanically enhancing the sensitivity of longitudinally loaded fiber optic sensorsSCHLUMBERGER TECHNOLOGY CORP·Filed 1999·Granted Jun 12, 2001·65 cites·36 claims
- 1484US10233934B2Fracture-resistant self-lubricating wear surfacesSCHLUMBERGER TECHNOLOGY CORP·Filed 2014·Granted Mar 19, 2019·5 cites·30 claims
- 1583US9157313B2Systems and methods for detecting drillstring loadsMADHAVAN RAGHU·Filed 2012·Granted Oct 13, 2015·9 cites·28 claims
- 1681US8614273B2Seal memberNOGUCHI TORU·Filed 2009·Granted Dec 24, 2013·4 cites·20 claims
- 1781US8344905B2Method and conduit for transmitting signalsINTELLISERV LLC·Filed 2008·Granted Jan 1, 2013·8 cites·21 claims
- 1881US6186227B1PackerSCHLUMBERGER TECHNOLOGY CORP·Filed 1999·Granted Feb 13, 2001·70 cites·24 claims
- 1980US8403332B2Seal memberNOGUCHI TORU·Filed 2009·Granted Mar 26, 2013·3 cites·19 claims
- 2074US8072347B2Method and apparatus for locating faults in wired drill pipeSANTOSO DAVID·Filed 2006·Granted Dec 6, 2011·17 cites·21 claims
- 2171US7683802B2Method and conduit for transmitting signalsINTELLISERV LLC·Filed 2007·Granted Mar 23, 2010·11 cites·17 claims
- 2270US8120508B2Cable link for a wellbore telemetry systemMADHAVAN RAGHU·Filed 2006·Granted Feb 21, 2012·12 cites·18 claims
- 2368US7857644B2Wired drill pipe having conductive end connectionsINTELLISERV LLC·Filed 2008·Granted Dec 28, 2010·10 cites·13 claims
- 2458US9366092B2Interface and method for wellbore telemetry systemHUTIN REMI·Filed 2006·Granted Jun 14, 2016·6 cites·41 claims
- 2554US2011156357A1Dynamic seal memberNISSIN KOGYO KK·Filed 2009·Application pending·0 cites
- 2652US8398301B2Apparatus for determining downhole fluid temperaturesMADHAVAN RAGHU·Filed 2010·Granted Mar 19, 2013·1 cites·20 claims
- 2752US2015325990A1Method and conduit for transmitting signalsINTELLISERV LLC·Filed 2015·Application pending·0 cites
- 2849US9109439B2Wellbore telemetry system and methodHACHE JEAN-MICHEL·Filed 2006·Granted Aug 18, 2015·2 cites·32 claims
- 2949US8810428B2Electrical transmission between rotating and non-rotating membersMADHAVAN RAGHU·Filed 2008·Granted Aug 19, 2014·3 cites·12 claims
- 3045US8322196B2Vibrating wire viscometersMADHAVAN RAGHU·Filed 2009·Granted Dec 4, 2012·3 cites·18 claims
- 3140US2009173493A1Interface and method for transmitting information to and from a downhole toolHUTIN REMI·Filed 2009·Application pending·0 cites
- 3236US2007030167A1Surface communication apparatus and method for use with drill string telemetryLI QIMING·Filed 2006·Application pending·0 cites
- 3336US2007063865A1Wellbore telemetry system and methodSCHLUMBERGER TECHNOLOGY CORP·Filed 2005·Application pending·0 cites
- 3433US5685574ASnap latch seal locator for sealingly latching tubing to a packer in a wellboreDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Nov 11, 1997·4 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →