Inventor · disambiguated record
Christopher Alan Sawdon
Also filed as: SAWDON CHRISTOPHER · SAWDON CHRISTOPHER A · SAWDON CHRISTOPHER ALAN
25 granted patents·5 pending applications·941 citations·filing 1994–2012
97Inventor score
Files withMI LLC14BP EXPLORATION OPERATING5SAWDON CHRISTOPHER ALAN4DOWELL A DIVISION OF SCHLUMBER2BRADBURY ANDREW1
Top patents by PatentIndex Score
30 records- 0198US6710019B1Wellbore fluidFiled 1999·Granted Mar 23, 2004·237 cites·8 claims
- 0293US8242059B2Wellbore fluidSAWDON CHRISTOPHER ALAN·Filed 2008·Granted Aug 14, 2012·44 cites·23 claims
- 0393US7449431B2Additive for increasing the density of a fluid for casing annulus pressure controlMI LLC·Filed 2004·Granted Nov 11, 2008·19 cites·16 claims
- 0492US7262152B2Reversible emulsions stabilized by amphiphilic polymers and application to drilling fluidMI LLC·Filed 2004·Granted Aug 28, 2007·44 cites·10 claims
- 0591US7854277B2Wellbore fluid comprising a base fluid and a particulate bridging agentBP EXPLORATION OPERATING·Filed 2007·Granted Dec 21, 2010·20 cites·17 claims
- 0690US8006761B2Wellbore fluid comprising a base fluid and a particulate bridging agentBP EXPLORATION OPERATING·Filed 2010·Granted Aug 30, 2011·8 cites·21 claims
- 0789US7651040B2Additive for increasing the density of an oil-based fluid and fluid comprising such additiveMI LLC·Filed 2009·Granted Jan 26, 2010·13 cites·5 claims
- 0889US7589049B2Additive for increasing the density of a fluid for casing annulus pressureMI LLC·Filed 2005·Granted Sep 15, 2009·16 cites·30 claims
- 0989US6861394B2Internal breakerMI LLC·Filed 2001·Granted Mar 1, 2005·85 cites·21 claims
- 1089US6770603B1Electrically conductive non-aqueous wellbore fluidsMI LLC·Filed 2000·Granted Aug 3, 2004·93 cites·12 claims
- 1188US6586372B1Additive for increasing the density of a fluid and fluid comprising such additiveMI LLC·Filed 1997·Granted Jul 1, 2003·70 cites·6 claims
- 1287US7538074B2Additive for increasing the density of an oil-based fluid and fluid comprising such additiveMI LLC·Filed 2007·Granted May 26, 2009·10 cites·4 claims
- 1386US7745380B2Additive for increasing the density of a fluid for casing annulus pressure controlMI LLC·Filed 2009·Granted Jun 29, 2010·12 cites·9 claims
- 1486US7267291B2Additive for increasing the density of an oil-based fluid and fluid comprising such additiveMI LLC·Filed 2003·Granted Sep 11, 2007·28 cites·7 claims
- 1585US5627143AWellbore fluidDOWELL SCHLUMBERGER INC·Filed 1994·Granted May 6, 1997·48 cites·12 claims
- 1682US6787505B1Electrically conductive non-aqueous wellbore fluidsMI LLC·Filed 1998·Granted Sep 7, 2004·57 cites·18 claims
- 1781US7919437B2Wellbore fluid comprising sulfonated copolymers with pendant alkyl groupsBP EXPLORATION OPERATING·Filed 2007·Granted Apr 5, 2011·7 cites·21 claims
- 1879US6803347B1Additive for wellbore fluidsSCHLUMBERGER TECHNOLOGY CORP·Filed 2000·Granted Oct 12, 2004·22 cites·10 claims
- 1974US5846913AInvert biodegradable n-alkane(s) wellbore fluid containing less than 10 percent by weight of cycloparaffing isoparaffing and aromatic compounds, and method of drilling with such fluidDOWELL A DIVISION OF SCHLUMBER·Filed 1997·Granted Dec 8, 1998·46 cites·22 claims
- 2072US7928039B2Reversible emulsions stabilized by amphiphilic polymersMI LLC·Filed 2007·Granted Apr 19, 2011·2 cites·10 claims
- 2171US7943554B2Wellbore fluid comprising at least one polymer containing pendant alkyl groupsBP EXPLORATION OPERATING·Filed 2007·Granted May 17, 2011·3 cites·20 claims
- 2271US7427582B2Internal breakerMI LLC·Filed 2004·Granted Sep 23, 2008·11 cites·8 claims
- 2365US7727939B2Composition of base fluid and polymeric dispersing agent-absorbed polymer-coated colloidal particlesMI LLC·Filed 2004·Granted Jun 1, 2010·16 cites·11 claims
- 2459US5962375AWellbore fluidsDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Oct 5, 1999·30 cites·23 claims
- 2548US2011146983A1Method of carrying out a wllbore operationSAWDON CHRISTOPHER ALAN·Filed 2009·Application pending·0 cites
- 2645US2009291861A1Wellbore fluidSAWDON CHRISTOPHER ALAN·Filed 2007·Application pending·0 cites
- 2743US2014076635A1Method of carrying out a wellbore operationBP EXPLORATION OPERATING·Filed 2012·Application pending·0 cites
- 2840US2008167203A1Additive For Reducing Torque On A Drill StringBRADBURY ANDREW·Filed 2006·Application pending·0 cites
- 2939US2003203822A1Additive for increasing the density of a fluid for casing annulus pressure controlFiled 2002·Application pending·0 cites
- 3035US8122959B2Methods and materials for zonal isolationSAWDON CHRISTOPHER ALAN·Filed 2006·Granted Feb 28, 2012·0 cites·20 claims
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