Noise-attenuating positioners for acoustic well-logging tools

Details Noise-attenuating positioners for acoustic well-logging tools Noise-attenuating positioners for acoustic well-logging tools

1975-01-08

1976-11-16

Moskowitz, Nelson

Acoustics

Geophysical or subsurface exploration

Well logging

166241, 308 4A, G01V 140, E21B 1710

Patent

active

039918505

ABSTRACT:
In the representative embodiment of the new and improved apparatus disclosed herein for positioning acoustic well-logging tools, outwardly-bowed elongated spring members of a wear-resistant metal are cooperatively spaced around the body of an acoustic-logging tool and arranged as required for maintaining the tool substantially centered within a well bore. To at least minimize or significantly attenuate the acoustic noise inherently generated by the rubbing of the outward faces of the spring members along the well bore walls which noise may otherwise unduly interfere with the reception of the acoustic logging signals, the inward faces of at least the mid portions of the several spring members are respectively covered with a composite material including an elastomer containing a substantial number of small embedded particles or interspersed balls of a sound-absorbing material such as lead.

REFERENCES:
patent: 2191121 (1940-02-01), Slichter
patent: 2396935 (1946-03-01), Walstrom
patent: 2695820 (1954-11-01), Segesman
patent: 3181645 (1965-05-01), Blizard
patent: 3564914 (1971-02-01), Desai et al.
patent: 3749168 (1973-07-01), Hall
patent: 3794976 (1974-02-01), Mickler
patent: 3883841 (1975-05-01), Norel et al.

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