TY - GEN
T1 - Comparative Experimental Study of Rock Cutting under High Confining Pressure and Atmospheric Conditions Using PDC Cutter
AU - Sheikhrezaei, Kian
AU - Taleghani, Arash Dahi
N1 - Publisher Copyright:
© ASCE.
PY - 2017
Y1 - 2017
N2 - While cutting metals is a well-studied problem, rock cutting due to its inherent complexity and more complicated physics due to its granular structure is less-known. The substantial role of the pore fluid pressure and confining pressure in the cutting process is one of these differences that may surface in practical engineering problems especially in deep subsurface drilling. Two sets of experiments were conducted in this research using single polycrystalline diamond compact (PDC) cutters. Regular scratch tests conducted in atmospheric pressure on Carthage Marble were compared with scratch/cutting tests performed under pressure. Finite element analysis (FEA) is then carried out to determine failure parameters by match lab measurement to investigate any potential changes in rock failure properties. It has been observed that pressurized conditions as low as 250 psi may convert the cutting process from intuitive fracture initiation and coalescence phenomenon to rock scooping. More ductile failure, formation of cutting ribbons and the size of cracks are some of these characteristics which are not observed in low confining pressures.
AB - While cutting metals is a well-studied problem, rock cutting due to its inherent complexity and more complicated physics due to its granular structure is less-known. The substantial role of the pore fluid pressure and confining pressure in the cutting process is one of these differences that may surface in practical engineering problems especially in deep subsurface drilling. Two sets of experiments were conducted in this research using single polycrystalline diamond compact (PDC) cutters. Regular scratch tests conducted in atmospheric pressure on Carthage Marble were compared with scratch/cutting tests performed under pressure. Finite element analysis (FEA) is then carried out to determine failure parameters by match lab measurement to investigate any potential changes in rock failure properties. It has been observed that pressurized conditions as low as 250 psi may convert the cutting process from intuitive fracture initiation and coalescence phenomenon to rock scooping. More ductile failure, formation of cutting ribbons and the size of cracks are some of these characteristics which are not observed in low confining pressures.
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U2 - 10.1061/9780784480779.235
DO - 10.1061/9780784480779.235
M3 - Conference contribution
AN - SCOPUS:85026329496
T3 - Poromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics
SP - 1900
EP - 1908
BT - Poromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics
A2 - Dangla, Patrick
A2 - Pereira, Jean-Michel
A2 - Ghabezloo, Siavash
A2 - Vandamme, Matthieu
PB - American Society of Civil Engineers (ASCE)
T2 - 6th Biot Conference on Poromechanics, Poromechanics 2017
Y2 - 9 July 2017 through 13 July 2017
ER -