Issued Patents All Time
Showing 51–57 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4729429 | Hydraulic pressure propelled device for making measurements and interventions during injection or production in a deflected well | — | 1988-03-08 |
| 4715446 | Device and method for the temporary protection of a working tool or measuring instrument fixed to the end of a drill string | — | 1987-12-29 |
| 4690214 | Method and a device for carrying out measurements and/or operations in a well | — | 1987-09-01 |
| 4664189 | Method and device for carrying out measurements and operations in a well | — | 1987-05-12 |
| 4660635 | Equipment for a pipe string such as a drill-pipe string, comprising a side entry connection for passing a cable | — | 1987-04-28 |
| 4570709 | Method and device for effecting, by means of specialized tools, such operations as measurements in highly inclined to the vertical or horizontal well portions | — | 1986-02-18 |
| 4457370 | Method and device for effecting, by means of specialized tools, such operations as measurements in highly inclined to the vertical or horizontal well portions | — | 1984-07-03 |