Abstract: A measuring device for a drilling apparatus which comprises a series of drilling rods, rotary and axially mobile. The measuring device comprises sensors, disposed on the series of rods, and feed devices of the electromagnetic induction type, able to feed the sensors electrically. Each of the devices is connected to a feed source and comprises a rotary element and a stator. A guide unit is mounted on the apparatus, and a slider, on which the stator is supported, is able to slide on the guide unit with an axial motion corresponding to that of the series of rods.

Abstract: Method for detecting and/or processing seismic signals, for example acoustic and/or elastic waves, generated by a plurality of seismic and/or acoustic sources and acquired by a plurality of seismic and/or acoustic sensors disposed in/on the subsurface, which provides at least a step in which at least a convolution operation is performed, applied to the seismic signals, having an orientation concordant with the orientation of the time axis, to obtain a signal assimilable to a seismic signal reflected by a reflector element disposed in correspondence with the seismic and/or acoustic sensors of the seismic and/or acoustic sources.

Abstract: A measuring device for a drilling apparatus which comprises a series of drilling rods, rotary and axially mobile. The measuring device comprises sensors, disposed on the series of rods, and feed devices of the electromagnetic induction type, able to feed the sensors electrically. Each of the devices is connected to a feed source and comprises a rotary element and a stator. A guide unit is mounted on the apparatus, and a slider, on which the stator is supported, is able to slide on the guide unit with an axial motion corresponding to that of the series of rods.

Abstract: A process for preparing vertical seismic profiles (VSP) by bore drilling using, as the seismic source, the vibrations generated by the drilling bit. A cross-correlation between the bit signal and the signals collected by seismic geophone lines, is determined in which the bit signal is processed by arranging a plurality of several types of detectors on the bore drilling facility. A plurality of traces are recorded, in which the signal/noise components have different characteristics. These can be separated by means introducing filter functions by operating either on their Fourier Transforms or on the basis of their statistic distribution.