Patent ID: 9074467
Filing Date: 2015-07-07
Classification: E21B,G01V

Abstract:
1. A method of identifying rock properties in real-time during drilling, the method comprising the steps of: providing an acoustic signal recording and transmitting system including an acoustic sensor; connecting the acoustic sensor to one of the following: (i) a drive shaft of a drill rig, the drive shaft having a plurality of extensions and (ii) an extension of the plurality of extensions of the drive shaft, the drive shaft connected to a drill string, a drill bit connected to the downhole end of the drill string; operably coupling a computer to one or more components of the acoustic signal recording and transmitting system to establish communications therebetween; receiving an acoustic sensor data signal from the acoustic signal recording and transmitting system by the computer, the acoustic sensor data signal representing an acoustic signal generated real-time by the acoustic sensor as a result of rotational contact of the drill bit with rock during drilling; and analyzing the acoustic sensor data signal by the computer to determine, in real-time, one or more of the following: (i) lithology type, and (ii) one or more petrophysical properties of rock engaged by the drill bit during drilling operations, the analyzing the acoustic sensor data signal comprising the steps of: