Communications – electrical: acoustic wave systems and devices – Wellbore telemetering
Reexamination Certificate
2005-06-21
2005-06-21
Wong, Albert K. (Department: 2635)
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
C367S075000, C367S025000, C367S032000, C702S006000, C181S105000, C181S122000, C181S106000, C340S854400
Reexamination Certificate
active
06909666
ABSTRACT:
An acoustic logging apparatus comprises a drill collar conveyed on a drilling tubular in a borehole within a formation. At least one transmitter is disposed in the drill collar. The transmitter includes at least one magnetostrictive actuator cooperatively coupled by a flexure ring to a piston for converting a magnetostrictive actuator displacement into a related piston displacement for transmitting an acoustic signal in the formation.
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Beimgraben Herbert W.
Canny Duane E.
Dubinsky Vladimir
Hansen Toby
Leggett, III James V.
Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Wong Albert K.
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