Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7669653 | System and method for maintaining zonal isolation in a wellbore | Bernadette Craster, Roger J. Card, Ashley Bernard Johnson, Paul Way, Hemant K.J. Ladva +2 more | 2010-03-02 |
| 7424912 | Wellbore treatment apparatus and method | — | 2008-09-16 |
| 6544933 | Drilling fluid | Bernadette Craster, John Peter Crawshaw, Terence George Balson | 2003-04-08 |
| 6040276 | Process and water-base fluid utilizing hydrophobically modified cellulose derivatives as filtrate reducers | Annie Audibert, Jean-Francois Argillier, Louise Bailey | 2000-03-21 |
| 5669456 | Process and water-base fluid utilizing hydrophobically modified cellulose derivatives as filtrate reducers | Annie Audibert, Jean-Francois Argillier, Louise Bailey | 1997-09-23 |
| 5637556 | Process and water-base fluid for controlling the dispersion of solids application to drilling | Jean-Francois Argillier, Annie Audibert, Louise Bailey | 1997-06-10 |
| 5597783 | Drilling processes and fluid used in well drilling applications | Annie Audibert, Jean-Francois Argillier, Jacqueline Lecourtier, Louise Bailey | 1997-01-28 |
| 4503177 | Stabilization of photochromic compounds, and the use of stabilized photochromic compounds | Brian Waters | 1985-03-05 |