Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8242059 | Wellbore fluid | — | 2012-08-14 |
| 8122959 | Methods and materials for zonal isolation | Hemant K. Ladva, Timothy Gareth John Jones, Gary John Tustin | 2012-02-28 |
| 8006761 | Wellbore fluid comprising a base fluid and a particulate bridging agent | Simon Neil Duncum | 2011-08-30 |
| 7943554 | Wellbore fluid comprising at least one polymer containing pendant alkyl groups | Simon Neil Duncum | 2011-05-17 |
| 7928039 | Reversible emulsions stabilized by amphiphilic polymers | Nathalie Monfreux-Gaillard, Patrick Perrin, Francoise Lafuma | 2011-04-19 |
| 7919437 | Wellbore fluid comprising sulfonated copolymers with pendant alkyl groups | Simon Neil Duncum | 2011-04-05 |
| 7854277 | Wellbore fluid comprising a base fluid and a particulate bridging agent | Simon Neil Duncum | 2010-12-21 |
| 7745380 | Additive for increasing the density of a fluid for casing annulus pressure control | Andrew Bradbury, Sonny Clary, William Matthew Reid, Tom Heinz | 2010-06-29 |
| 7727939 | Composition of base fluid and polymeric dispersing agent-absorbed polymer-coated colloidal particles | Andrew Bradbury, Sonny Clary, William Matthew Reid, Tom Heinz | 2010-06-01 |
| 7651040 | Additive for increasing the density of an oil-based fluid and fluid comprising such additive | Andrew Bradbury, Jarrod Massam | 2010-01-26 |
| 7589049 | Additive for increasing the density of a fluid for casing annulus pressure | Andrew Bradbury, Sonny Clary, William Matthew Reid, Tom Heinz | 2009-09-15 |
| 7538074 | Additive for increasing the density of an oil-based fluid and fluid comprising such additive | Andrew Bradbury, Jarrod Massam | 2009-05-26 |
| 7449431 | Additive for increasing the density of a fluid for casing annulus pressure control | Andrew Bradbury, Sonny Clary, William Matthew Reid, Tom Heinz | 2008-11-11 |
| 7427582 | Internal breaker | David Antony Ballard, Trevor G. Jappy | 2008-09-23 |
| 7267291 | Additive for increasing the density of an oil-based fluid and fluid comprising such additive | Andrew Bradbury, Jarrod Massam | 2007-09-11 |
| 7262152 | Reversible emulsions stabilized by amphiphilic polymers and application to drilling fluid | Nathalie Monfreux-Gaillard, Patrick Perrin, Francoise Lafuma | 2007-08-28 |
| 6861394 | Internal breaker | David Antony Ballard, Trevor G. Jappy | 2005-03-01 |
| 6803347 | Additive for wellbore fluids | Hemant K. Ladva, Paul R. Howard | 2004-10-12 |
| 6787505 | Electrically conductive non-aqueous wellbore fluids | Geoffrey Maitland, Mostafa Ahmadi Tehrani | 2004-09-07 |
| 6770603 | Electrically conductive non-aqueous wellbore fluids | Mostafa Ahmadi Tehrani, Paul Ryan Craddock, Anthony Lawson | 2004-08-03 |
| 6710019 | Wellbore fluid | David Antony Ballard | 2004-03-23 |
| 6586372 | Additive for increasing the density of a fluid and fluid comprising such additive | Andrew Bradbury | 2003-07-01 |
| 5962375 | Wellbore fluids | Shreekant Babulal Mehta | 1999-10-05 |
| 5846913 | Invert 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 fluid | — | 1998-12-08 |
| 5627143 | Wellbore fluid | — | 1997-05-06 |