Patent ID: 6023444
Filing Date: 2000-02-08
Classification: E21B,G01V

Abstract:
A method for the acquisition of signals during a well drilling operation, comprising the following steps:creating a vibration with a vibration source,recording a plurality of signals representative of said vibration by at least two sensors, the first sensor of the at least two sensors being placed at a ground surface point and recording a first signal, the second sensor of the at least two sensors being placed in a string used for drilling and recording a second signal,connecting said first sensor to surface electronic control means,emitting an electromagnetic wave synchronization code from an electronic control,recording said code with the first and second signals acquired by said first and second sensors respectively,storing the second signal provided by said second sensor in a storage module for a time interval,recovering the second signal contained in the storage module at the ground surface point at the end of said time interval, andperforming synchronization adjustments upon the first and second signals utilizing the recorded synchronization code, wherebythe synchronized first and second signals may be further processed to obtain geologic information.