Yingxin Yang

TL;DR: In this paper, a nonlinear dynamical model of the cross-cutting PDC bit with the combination of both experiment and numerical simulation was established, the stress status within rock units, sliding fracture characteristic, plastic energy consumption and stress distribution along the cutter edge were analyzed in the crosscutting process.

TL;DR: In order to solve the problems of low rate of penetration (ROP) and short service life of the bit drilling in hard formation, a hybrid bit, disc-like hybrid bit (DLHB) is put forward in this paper.

TL;DR: In this paper, a polycrystalline diamond compact (PDC) drill bit with a special structure was introduced to solve a major problem faced by drilling technicians, that of how to improve rock breaking efficiency in complex strata.

TL;DR: This analysis using path-following techniques for non-smooth systems reveals the inherent coexistence of stick-slip vibration and constant rotation, and identifies a critical point where the drill-bit speed coincides with the desired angular speed.

TL;DR: In this article, the influence of the bedding plane angle on the fracture morphology and perforation damage under SC-CO2 jet fracturing was investigated via the macro fracture analysis, strain monitoring, Scanning Electron Microscope (SEM) test and Energy Dispersive Spectroscopy (EDS) test.