Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1991-06-28
1994-05-03
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367 35, 367 75, 367911, 181105, G01V 140
Patent
active
053094042
ABSTRACT:
An apparatus for reducing or eliminating the effects of a quadrupole component of an acoustic signal received from a transversely mounted acoustic source in a drill collar of a logging while drilling tool. The apparatus includes a drill collar for supporting a drill bit, a transversely mounted transmitter situated in a first horizontal plane in the drill collar which transmits acoustic energy into an earth formation. The drill collar also houses at least one receiver mounted in a second horizontal plane in the drill collar at an angular displacement from the transmitter such that the effects of a quadrupole component of the acoustic energy detected by the receiver are rendered insignificant.
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Chang Shu-Kong
Kostek Sergio
Plona Thomas J.
Foodman Marc D.
Moskowitz Nelson
Pojunas Leonard W.
Schlumberger Technology Corporation
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