Circuit for echo and noise suppression of accoustic signals transmitted through a drill string

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:869102

Drumheller, Douglas S ^[1]; Scott, Douglas D ^[2]

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1. P.O. Box 676, Cedar Crest, NM 87008
2. 12911 Kachima Place N.E., Apt. A, Albuquerque, NM 37112

An electronic circuit for digitally processing analog electrical signals produced by at least one acoustic transducer is presented. In a preferred embodiment of the present invention, a novel digital time delay circuit is utilized which employs an array of First-in-First-out (FiFo) microchips. Also, a bandpass filter is used at the input to this circuit for isolating drill string noise and eliminating high frequency output.

• Research Organization: AT&T
• DOE Contract Number: AC04-76DP00789
• Assignee: Drumheller, Douglas S. (P.O. Box 676, Cedar Crest, NM 87008);Scott, Douglas D. (12911 Kachima Place N.E., Apt. A, Albuquerque, NM 37112)
• Patent Number(s): US 5274606
• OSTI ID: 869102
• Country of Publication: United States
• Language: English

Related Subjects

circuit
echo
noise
suppression
accoustic
signals
transmitted
drill
string
electronic
digitally
processing
analog
electrical
produced
acoustic
transducer
preferred
embodiment
novel
digital
time
delay
utilized
employs
array
first-in-first-out
fifo
microchips
bandpass
filter
input
isolating
eliminating
frequency
output
frequency output
analog electrical
acoustic transducer
electronic circuit
bandpass filter
electrical signals
time delay
electrical signal
preferred embodiment
drill string
pass filter
signals produced
signals transmitted
noise suppression
delay circuit
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