Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7745380 | Additive for increasing the density of a fluid for casing annulus pressure control | Andrew Bradbury, Christopher Alan Sawdon, William Matthew Reid, Tom Heinz | 2010-06-29 |
| 7727939 | Composition of base fluid and polymeric dispersing agent-absorbed polymer-coated colloidal particles | Andrew Bradbury, Christopher Alan Sawdon, William Matthew Reid, Tom Heinz | 2010-06-01 |
| 7589049 | Additive for increasing the density of a fluid for casing annulus pressure | Andrew Bradbury, Christopher Alan Sawdon, William Matthew Reid, Tom Heinz | 2009-09-15 |
| 7449431 | Additive for increasing the density of a fluid for casing annulus pressure control | Andrew Bradbury, Christopher Alan Sawdon, William Matthew Reid, Tom Heinz | 2008-11-11 |