Patent ID: 9664039
Date: 2017-05-30
CPC Classifications: E21B,G01V

Claim:
1. A method of characterizing rock properties while drilling comprising: receiving acoustical signals obtained from one or more sensors positioned on a component of a bottom hole assembly, the acoustical signals generated from a drill bit interacting with a rock formation while drilling a wellbore; processing the acoustical signals to obtain forces acting on the drill bit interacting with the rock formation while drilling the wellbore and to obtain displacements of the drill bit interacting with the rock formation while drilling the wellbore; and processing the forces and the displacements to obtain at least one set of data values representative of a mechanical rock property of the rock formation along the wellbore created by the drill bit interacting with the rock formation for a period of time, wherein the acoustical signals include an axial acceleration of the drill bit and a lateral or rotary acceleration of the drill bit.