| 摘要 |
The invention relates to a device for acquisition of a seismic signal emitted by a drilling bit, arranged at one end of a drilling pipe turning about an axis of rotation. According to the invention, the acquisition device consists of a coupling base (110) intended to be fixed onto the said drilling pipe (10), an insulating rotor (120), intended to be fixed onto the said base, and provided with parallel conducting tracks (121, 122) connected respectively to the outputs of at least one vibration sensor (111) solidly attached to the base/ôrotor assembly, means (151) for fastening the rotor (120) on the base (110) and centring means (152) arranged on the said coupling base, allowing the said conducting tracks (121, 122) to be kept centred on the axis of rotation (21), and a stator (160) forming a cap on the said insulating rotor (120) and including contacts (161, 162) intended to interact respectively with the conducting tracks of the rotor, the relative movement of the stator (160) and the rotor being ensured by at least rolling bearings (163, 164). Application to the geophysical study of the subsoil. <IMAGE>
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