G - Physics – 01 – V
Patent
G - Physics
01
V
166/3, 349/4
G01V 1/40 (2006.01) G01V 1/46 (2006.01)
Patent
CA 1316588
ABSTRACT Method and apparatus for logging a borehole of the type in which an acoustic energy signal scans the borehole wall at a plurality of different depths thereby generating signals reflected from a reflecting boundary which are indicative of the condition of the reflecting boundary. A downhole microcomputer generates a sync signal for firing a transducer thereby directing an acoustic pulse toward the borehole wall. The transducer is rotated by a stepper motor. The computer synchronizes the number of transducer pulses with the number of stepper motor pulses thereby generating a constant number of transducer pulses per motor revolution. Reflected acoustic energy generates an electrical pulse which is amplified and summed with a signal relating to the rota- tional orientation of the transducer and the occurrence of the transducer firing pulse. The summed signal provides information relating to the condition of the reflecting boundary and may be used to generate a video image thereof. GMB:tb 87106ART0046
561871
Morris Steven A.
Mount Houston B. II
Penn John T.
Amoco Corporation
Gowling Lafleur Henderson Llp
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