Apparatus for the acquisition of a seismic signal transmitted by

Details Apparatus for the acquisition of a seismic signal transmitted by Apparatus for the acquisition of a seismic signal transmitted by

1993-02-04

1993-09-28

Eldred, J. Woodrow

Acoustics

Geophysical or subsurface exploration

Well logging

181108, 3408544, 367 25, 367 82, 367912, 73151, 175 40, G01V 140

Patent

active

052488578

ABSTRACT:
The invention concerns an apparatus for the acquisition of a seismic signal transmitted by a drill bit, placed at the end of a drill pipe rotating about an axis of rotation. According to the invention, the acquisition apparatus consists of a coupling connector (110) intended to be fixed to the said drill pipe (10), an insulating rotor (120), designed to be fixed to the said connector, and fitted with parallel strip conductors (121,122) connected respectively to the outputs of at least one vibration transducer (111) integral with the connector/rotor combination, means (151) for fixing the rotor (120) to the connector (110) and means (152) for centering placed on the said coupling connector, designed to maintain the said strip conductors (121,122) centered on the axis of rotation (21), and a stator (160) forming a retaining ring on the said insulating rotor (120) and containing contacts (161,162) provided to cooperate respectively with the strip conductors of the rotor, and the relative motion of the stator (160) and the rotor is ensured by at least support bearings (163,164). Application to the geophysical survey or the subsoil.

REFERENCES:
patent: 2414719 (1947-01-01), Cloud
patent: 3486375 (1969-12-01), Redwine et al.
patent: 4715451 (1987-12-01), Bseisu et al.
patent: 4965774 (1990-10-01), Ng et al.
patent: 5141061 (1992-08-01), Henneuse
patent: 5166908 (1992-11-01), Montgomery
patent: 5193628 (1993-03-01), Hill et al.

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