Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through drill string or casing
Reexamination Certificate
2005-06-28
2005-06-28
Lobo, Ian J. (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
Through drill string or casing
C367S081000, C340S853100, C340S854400, C175S040000
Reexamination Certificate
active
06912177
ABSTRACT:
Data is transmitted along a borehole containing a drill stem (2) by means of a transmitter (6) which converts electric data signals to acoustic signals propagating along the drill stem (2). The acoustic signals are converted back to electric form by a receiver (12) which also processes the signals. In the preferred form the signals are stored in a receiver memory (15) for subsequent retrieval using a pick-up tool (5) lowered into the borehole. The system is particularly useful in moving data past an obstruction such as a shut-in valve (4).
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Drinker Biddle & Reath LLP
Lobo Ian J.
Metrol Technology Limited
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