Due to the shear failure caused by the compressive stress concentration in the wellbore wall
and the non-isotropy of the in situ stresses, the actual shape of the wellbore cross-section is …

Drilling pressure relief is a widely recognized and applied key technique to reduce the risk of
rock burst occurrence, and its field-applied effects are also obvious. In this paper, the values …

To study borehole deformation under non-uniform horizontal principal stress in the deep
strata, a prediction method for horizontal principal stress was developed based on the …

One of the most important instabilities that may occur in a borehole is shear instability
caused by high compressive stress in the borehole wall. The initial estimation of the width …

Specific instability of boreholes drilled through rocks, such as borehole breakout, borehole
collapse, and shale swelling, is a significant concern in drilling operations due to the …

In this article, using a two-dimensional numerical model based on the finite element method,
the fracture pressure of rock samples with a circular hole in the center is obtained. In this …