METHOD AND DEVICE FOR EVALUATION OF DRILL BIT CONDITIONS Russian patent published in 2014 - IPC E21B47/00 E21B47/01 E21B12/02 E21B10/00 

FIELD: mining.

SUBSTANCE: invention relates to drill bits. Brill bit comprises body with at least one gaging plate and set of accelerometers. Said set comprises radial and tangential accelerometers for determination of radial and tangential acceleration of drill bit. It includes data analysis module incorporating processor, memory and communication port. This module is designed to fulfil the jobs that follow. Sampling the data on acceleration from accelerometers during the analysis. Loading said data to memory to get the acceleration time history. Analysis of acceleration time history for determination of distance made by at least one gaging plate. Analysis of acceleration time history for determination of at least one plate cutting period and at least one plate sliding period. Evaluation of gaging plate wear proceeding from determination of distance made by at least one gaging plate and at least one sliding period. In compliance with proposed method, data is collected from accelerometers by periodic sampling of data from at least two accelerometers arranged in drill bit to get acceleration time history during the analysis. Acceleration time history data is processed for determination of profile of distance made by at least one gaging plate. Rock current hardness is defined for analysis of the profile of distance made by at least one gaging plate. Now, current rock hardness is defined to evaluate the gaging plate wear.

EFFECT: adequate determination.

14 cl, 13 dwg