RT Journal Article ID 0465a14e5b493c67 A1 Dewangan, Satish Kumar A1 Sinha, Shobha Lata T1 PREDICTION OF HOLE INSTABILITY (ENLARGEMENT) BY SLURRY EROSIVE WEAR MEASUREMENT STUDIES: IN THE CONTEXT OF PETROLEUM WELL-DRILLING INDUSTRIES JF Multiphase Science and Technology JO MST YR 2016 FD 2018-04-02 VO 28 IS 3 SP 193 OP 226 K1 borehole enlargement K1 drilling defect K1 slurry erosion K1 particulate wear K1 hole instability K1 drill cutting particles AB Hole instability (enlargement) of the borehole for oil or gas exploration is primarily governed by erosive wear caused by drill cuttings in the drilling slurry. The borehole wear rate and wall shear stress depend on the solid particle size, particle shape, particle concentration, material of the particles in the slurry, and flow conditions, as well as the mechanical properties of the material becoming eroded. This paper presents an experimental approach to predict the wear ensued by drilling slurry carrying the particles of drilled cuttings, using the slurry erosion test rig TR-40 (made by DUCOM Instruments, Bengaluru, India). The wear rate, wall shear stress, and friction factors were obtained for different slurry conditions. Various slurry conditions responsible for hole instability were predicted for a vertical borehole through the wear rate and wall shear stress trends manifested by different drilling slurries. The effectiveness of this approach was also examined in relation to its applicability in detecting hole instability in horizontal annular wellbores. PB Begell House LK https://www.dl.begellhouse.com/journals/5af8c23d50e0a883,6fd870467a4166de,0465a14e5b493c67.html