: This paper presents a rock/bit interaction model as well as its implementation in the dynamic simulation of drilling operation using rotary tri-cone bit. The new rock/bit interaction model assumes, firstly, at any instant during drilling operation the rock material fractures under a complex stress field created by the teeth attacking (touching) the rock surface; Secondly, the process for each tooth to attack the rock surface (cratering) can be divided into four stages: (a) initial contact, (b) indentation, (c) scraping or gouging, and (d) departure; And thirdly, the loading history may also be responsible for development of rock fracturing process. The modeling concept was implemented to simulate a cutting process in a toothed-ring cutting experiment. The results showed the dynamic simulation based on the new rock/bit interaction model provided an efficient way for numerical modeling of rotary drilling operations.

This content is only available via PDF.
You can access this article if you purchase or spend a download.