Inventor · disambiguated record
Colin Longfield
Also filed as: LONGFIELD COLIN · LONGFIELD COLIN ARTHUR
20 granted patents·5 pending applications·488 citations·filing 2001–2016
95Inventor score
Files withSCHLUMBERGER TECHNOLOGY CORP15ROY INDRANIL3BRENNAN III WILLIAM E2LONGFIELD COLIN2PATTERSON II ALBERT E1
Top patents by PatentIndex Score
25 records- 0196US7654321B2Formation fluid sampling apparatus and methodsSCHLUMBERGER TECHNOLOGY CORP·Filed 2006·Granted Feb 2, 2010·104 cites·26 claims
- 0294US7114562B2Apparatus and method for acquiring information while drillingSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Oct 3, 2006·146 cites·87 claims
- 0391US8220533B2Downhole piezoelectric devicesLONGFIELD COLIN·Filed 2009·Granted Jul 17, 2012·21 cites·7 claims
- 0490US7278480B2Apparatus and method for sensing downhole parametersSCHLUMBERGER TECHNOLOGY CORP·Filed 2005·Granted Oct 9, 2007·41 cites·26 claims
- 0580US7311142B2Apparatus and method for aquiring information while drillingSCHLUMBERGER TECHNOLOGY CORP·Filed 2006·Granted Dec 25, 2007·18 cites·29 claims
- 0679US7546885B2Apparatus and method for obtaining downhole samplesSCHLUMBERGER TECHNOLOGY CORP·Filed 2006·Granted Jun 16, 2009·18 cites·21 claims
- 0779US6467387B1Apparatus and method for propelling a data sensing apparatus into a subsurface formationSCHLUMBERGER TECHNOLOGY CORP·Filed 2001·Granted Oct 22, 2002·53 cites·25 claims
- 0878US7841406B2Formation fluid sampling apparatus and methodsSCHLUMBERGER TECHNOLOGY CORP·Filed 2009·Granted Nov 30, 2010·14 cites·1 claims
- 0976US9316076B2High pressure high temperature (HPHT) well tool control system and methodLONGFIELD COLIN·Filed 2011·Granted Apr 19, 2016·7 cites·15 claims
- 1075US7578342B2Inflatable packer assemblySCHLUMBERGER TECHNOLOGY CORP·Filed 2008·Granted Aug 25, 2009·14 cites·6 claims
- 1175US7392851B2Inflatable packer assemblySCHLUMBERGER TECHNOLOGY CORP·Filed 2004·Granted Jul 1, 2008·42 cites·16 claims
- 1270US9194974B2Method to predict dense hydrocarbon saturations for high pressure high temperatureROY INDRANIL·Filed 2011·Granted Nov 24, 2015·3 cites·4 claims
- 1364US8695717B2Inflatable packer assemblyBRENNAN III WILLIAM E·Filed 2012·Granted Apr 15, 2014·3 cites·2 claims
- 1462US10514104B2Indexer controlled directional valve systemSCHLUMBERGER TECHNOLOGY CORP·Filed 2016·Granted Dec 24, 2019·1 cites·17 claims
- 1557US10246991B2Acoustic detection systemSCHLUMBERGER TECHNOLOGY CORP·Filed 2014·Granted Apr 2, 2019·1 cites·18 claims
- 1651US8978757B2Remote actuation testing tool for high pressure differential downhole environmentsWANG WEI·Filed 2011·Granted Mar 17, 2015·1 cites·18 claims
- 1744US9062514B2Downhole valveSCHLUMBERGER TECHNOLOGY CORP·Filed 2013·Granted Jun 23, 2015·0 cites·18 claims
- 1842US10392900B2Actuation control system using pilot control circuitSCHLUMBERGER TECHNOLOGY CORP·Filed 2015·Granted Aug 27, 2019·0 cites·17 claims
- 1941US2010170682A1Inflatable packer assemblyBRENNAN III WILLIAM E·Filed 2009·Application pending·0 cites
- 2040US9535187B2Device and method to determine conductivity for high pressure-high temperature serviceROY INDRANIL·Filed 2011·Granted Jan 3, 2017·0 cites·19 claims
- 2140US2011083859A1Downhole valveSCHLUMBERGER TECHNOLOGY CORP·Filed 2009·Application pending·0 cites
- 2239US8720539B2Modular power source for subsurface systemsPATTERSON II ALBERT E·Filed 2008·Granted May 13, 2014·1 cites·17 claims
- 2339US2013289961A1Methods For Producing Fluids From Geological FormationRAY INDRANIL·Filed 2011·Application pending·0 cites
- 2439US2012059640A1Thermodynamic modeling for optimized recovery in sagdROY INDRANIL·Filed 2011·Application pending·0 cites
- 2537US2006168955A1Apparatus for hydraulically energizing down hole mechanical systemsSCHLUMBERGER TECHNOLOGY CORP·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →