Issued Patents All Time
Showing 51–71 of 71 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6742606 | Method and apparatus for drilling and lining a wellbore | Paul David Metcalfe | 2004-06-01 |
| 6722442 | Subsurface apparatus | — | 2004-04-20 |
| 6712151 | Tubing expansion | David M. Haugen | 2004-03-30 |
| 6702030 | Procedures and equipment for profiling and jointing of pipes | — | 2004-03-09 |
| 6702029 | Tubing anchor | Paul David Metcalfe | 2004-03-09 |
| 6695065 | Tubing expansion | David Grant, Grant Adams | 2004-02-24 |
| 6688400 | Downhole sealing | Paul David Metcalfe | 2004-02-10 |
| 6607046 | Expandable drill bit | Michael John Betts, Timothy William Rhys Harris | 2003-08-19 |
| 6543552 | Method and apparatus for drilling and lining a wellbore | Paul David Metcalfe | 2003-04-08 |
| 6527049 | Apparatus and method for isolating a section of tubing | Paul David Metcalfe | 2003-03-04 |
| 6460616 | Traction apparatus | — | 2002-10-08 |
| 6457532 | Procedures and equipment for profiling and jointing of pipes | — | 2002-10-01 |
| 6446323 | Profile formation | Paul David Metcalfe | 2002-09-10 |
| 6425444 | Method and apparatus for downhole sealing | Paul David Metcalfe | 2002-07-30 |
| 6059661 | Shaft alignment | — | 2000-05-09 |
| 5649603 | Downhole tools having circumferentially spaced rolling elements | Paul Raymond Coey | 1997-07-22 |
| 5606132 | Strain indicator using an optical indicator means | — | 1997-02-25 |
| 5358026 | Investment casting process | — | 1994-10-25 |
| 5101692 | Drill bit or corehead manufacturing process | — | 1992-04-07 |
| 5030071 | Roller van motor with fluid biassed roller | — | 1991-07-09 |
| 4589504 | Well bore enlarger | — | 1986-05-20 |