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

Patent · Thu Dec 31 23:00:00 EST 1992

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 CORP
• 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

/367/340/
accoustic
acoustic
acoustic transducer
analog
analog electrical
array
bandpass
bandpass filter
circuit
delay
delay circuit
digital
digitally
drill
drill string
echo
electrical
electrical signal
electrical signals
electronic
electronic circuit
eliminating
embodiment
employs
fifo
filter
first-in-first-out
frequency
frequency output
input
isolating
microchips
noise
noise suppression
novel
output
pass filter
preferred
preferred embodiment
processing
produced
signals
signals produced
signals transmitted
string
suppression
time
time delay
transducer
transmitted
utilized