Drilling is one of the most expensive processes in the oil and gas exploration and
exploitation processes which is commonly performed with polycrystalline diamond compact …

How to increase the rock-breaking efficiency is the prerequisite for improving the rate of
penetration (ROP) in drilling. At present, the roller cone bits and Polycrystalline Diamond …

This paper provides compelling experimental evidence that the unconfined compressive
strength of rocks can be reliably assessed from scratch tests performed with a sharp cutter …

In this paper a study of the self-excited stick–slip oscillations of a rotary drilling system with a
drag bit, using a discrete model that takes into consideration the axial and torsional vibration …

Tool‐rock interaction processes can be classified as indentation or cutting depending on the
direction of motion of the tool with respect to the rock surface. The modes of failure induced …

Rock cutting is a challenging problem from a modeling perspective. The challenges come
from the complexity of the physics from the tool–rock interaction to the fracture process and …

With ever more challenging (T, p) environments for cementing applications in oil and gas
wells, there is a need to identify the fundamental mechanisms of fracture resistant oil well …

Gas outburst is recognized as a potentially fatal hazard to be managed during the mining of
gassy coal seams. Gas outbursts in Australian coal mines have been associated with the …

Measuring-while-drilling has been considered as an effective method to determine the
mechanical properties of rock. In this paper, drilling models are improved for predicting the …

This study on discrete element modelling of tool-rock interaction focuses on establishing
scaling laws between the phenomenological parameters of a material and the properties of …