Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7946344 | Method and assembly for producing oil and/or gas through a well traversing stacked oil and/or gas bearing earth layers | Johannes Cornelis Maria Van Dongen | 2011-05-24 |
| 6959760 | Downhole pulser | Wilhelmus Hubertus Paulus Maria Heijnen | 2005-11-01 |
| 6742585 | Sealing off openings through the wall of a well tubular | Wilhelmus Hubertus Paulus Maria Heijnen, Pieter Karel Anton Kapteijn | 2004-06-01 |
| 6705085 | Downhole electric power generator | Wilhelmus Hubertus Paulus Maria Heijnen | 2004-03-16 |
| 6464001 | Multilateral wellbore system | Wilhelmus Hubertus Paulus Maria Heijnen, Robert Nicholas Worrall | 2002-10-15 |
| 6460618 | Method and apparatus for improving the permeability in an earth formation utilizing shock waves | Wilhelmus Hubertus Paulus Maria Heijnen | 2002-10-08 |
| 6460619 | Method and apparatus for creation and isolation of multiple fracture zones in an earth formation | Wilhelmus Hubertus Paulus Maria Heijnen | 2002-10-08 |