Patent ID: 6196335
Filing Date: 2001-03-06
Classification: G01V

Abstract:
An apparatus for enhancement of drill bit seismics through selection of events monitored at the drill bit comprisingan axial transducer sensitive to axial acceleration of a drill bit, the axial transducer configured to produce an axial transducer signal representative of the axial acceleration of the drill bit;an axial sampler coupled to the axial transducer signal, the axial sampler configured to take samples of the axial transducer signal to produce axial samples;a lateral transducer sensitive to lateral acceleration of the drill bit, the lateral transducer configured to produce a lateral transducer signal representative of the lateral acceleration of the drill bit;a lateral sampler coupled to the lateral transducer signal, the lateral sampler configured to take samples of the lateral transducer signal to produce lateral samples; anda pulse selector configured to select axial samples for analysis and to transmit to the surface the axial samples and a time related to the time that the axial samples were sampled.