Determining velocity of acoustic waves in drilling mud

A logging tool 505 conveyed in a fluid filled borehole comprises an acoustic transmitter 503S or 501 for generating acoustic waves in the borehole fluid and an acoustic receiver 503R or 501 for detecting acoustic waves propagated through the fluid over a known path length. The transmitter and receiv...

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Bibliographic Details
Main Authors PHILIP KURKOSKI, ERIC B MOLZ, GAMAL A HASSAN
Format Patent
LanguageEnglish
Published 13.09.2006
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES
MEASURING
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PHYSICS
TESTING
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Summary:A logging tool 505 conveyed in a fluid filled borehole comprises an acoustic transmitter 503S or 501 for generating acoustic waves in the borehole fluid and an acoustic receiver 503R or 501 for detecting acoustic waves propagated through the fluid over a known path length. The transmitter and receiver are either provided a separate transducers 503S, 503R on opposing parallel walls of a recess or channel 515 in the logging tool 505, or alternatively as a single transducer 501 on one of the two walls of the recess 515. The travel time of the acoustic wave over the known path length, or the attenuation of the signal, is used to determine the velocity of acoustic waves in the borehole fluid (e.g. drilling mud).
Bibliography:Application Number: GB20060010516