Acoustics – Geophysical or subsurface exploration – Well logging
Patent
1977-10-03
1979-10-16
Moskowitz, Nelson
Acoustics
Geophysical or subsurface exploration
Well logging
166241, 308 4A, G01V 140, E21B 1710
Patent
active
041710312
ABSTRACT:
A well logging instrument is attached at its first end to a well logging cable and is connected at its second end through a flex joint to a shaft section which through another flex joint is connected at its lower end to a centralizing section. As the well logging instrument traverses an earth borehole, the lower centralizer section maintains the guide nose of the centralizer section away from the ledges encountered along the borehole walls and a shaft flexibly connected between the well logging instrument and the centralizer section ties the gravity decentralized logging instrument to the lower centralizing section and steers the lower guide nose away from the ledges which are encountered.
REFERENCES:
patent: 1555918 (1925-10-01), Friesen
patent: 2931440 (1960-04-01), LeBourg
patent: 3572432 (1971-03-01), Aulick
patent: 3613783 (1971-10-01), Seabourn
patent: 3978924 (1976-09-01), Roesner
patent: 3982606 (1976-09-01), Berry et al.
patent: 3991850 (1976-11-01), Escaron
Crowder, Jr. Albert M.
Dresser Industries Inc.
Moskowitz Nelson
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