Cutting capacity of PDC cutters in
very hard rock
very hard rock
(1.Institute of Mining and Rock Engineering,
Central South University, Changsha 410083, China；
2.Rock Mechanics and Explosives Research Center,
University of Missouri-Rolla, MO65401, USA)
Central South University, Changsha 410083, China；
2.Rock Mechanics and Explosives Research Center,
University of Missouri-Rolla, MO65401, USA)
Abstract: An experimental programm of investigating the cutting capacity of PDC flat cutters in very hard rock has been performed. Experiments include both the cutting of PDC fixed at different angles on the granite core or bar and linear cutting with different static thrust on the block of granite. The effects of the rough degree of rock surface, cutting angles, and static thrust on the cutting capacity of PDC in very hard rock were investigated and analyzed. The results show that the single mode of rotary drilling using PDC cutters is not applied for very hard rocks.
Key words: cutting test of rock; PDC cutters; rotary drilling