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Legal status
Patent not validated
| (51) | INT.CL. | E21B 47/06 | |
| E21B 47/12 | |||
| G01K 11/32 |
| (11) | Number of the document | 1871990 |
| (13) | Kind of document | T |
| (96) | European patent application number | 06750751.7 |
| Date of filing the European patent application | 2006-04-21 | |
| (97) | Date of publication of the European application | 2008-01-02 |
| (45) | Date of publication and mention of the grant of the patent | 2009-06-24 |
| (46) | Date of publication of the claims translation |
| (86) | Number | PCT/US2006/014778 |
| Date | 2006-04-21 |
| (87) | Number | WO 2006/115945 |
| Date | 2006-11-02 |
| (30) | Number | Date | Country code |
| 674081 P | 2005-04-22 | US |
| (72) |
MCKINZIE, Billy John, US
VINEGAR, Harold J., US
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| (73) |
Shell Internationale Research Maatschappij B.V.,
Carel van Bylandtlaan 30, 2596 HR Den Haag,
NL
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| (54) | LOW TEMPERATURE MONITORING SYSTEM FOR SUBSURFACE BARRIERS |
| LOW TEMPERATURE MONITORING SYSTEM FOR SUBSURFACE BARRIERS |