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Remote downhole actuation device |
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| 9650851 |
Autonomous untethered well object |
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| 9482233 |
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| 9206684 |
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| 7982633 |
Data communication and power supply system for downhole applications |
John Freer |
2011-07-19 |
| 7787525 |
Method and apparatus for transmission of well-bore data on multiple carrier frequencies |
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2009-12-01 |
| 6378610 |
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2002-04-30 |
| 6302203 |
Apparatus and method for communicating with devices positioned outside a liner in a wellbore |
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2001-10-16 |
