Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through drill string or casing
Patent
1980-04-10
1983-06-28
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
Through drill string or casing
181103, 175 40, G01V 140
Patent
active
043909752
ABSTRACT:
Data is transmitted through a drill string by means of acoustical energy by transmitting an acoustical signal for a first predetermined interval and ceasing transmission of the signal for a second predetermined interval to represent a first binary state; ceasing transmission of the signal for a third predetermined interval to represent a second binary state; and combining transmission and cessation of transmission of the signal in binary sequences representative of borehole data.
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The University of Michigan Engineering Summer Conferences, "Digital Communications System," 7/23/71, p. 40.
Fogarty, "High Density Recording . . . A Communications View," 6/75, pp. 24-26, Digital Design.
Mahoney et al., Digital Communications," 1966, pp. 4&14, RCA Institute, Lecture Notes.
Schwarz "A Method to Reduce . . . Sound Transmission", 6/16/80, pp. 1-3, Tn No. 1246.
Moskowitz Nelson
NL Sperry-Sun, Inc.
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