The design and use of superhydrophobic surfaces have gained special attentions due to
their superior performances and advantages in many flow systems, eg, in achieving specific …

Keeping the drilling fluid equivalent circulating density in the operating window between the
pore and fracture pressure is a challenge, particularly when the gap between these two is …

Controlling the annular frictional pressure losses is important in order to drill safely with
overpressure without fracturing the formation. To predict these pressure losses, however, is …

In oil and gas drilling, cuttings-transport-related problems are a major contributor to well
downtime and costs. As a result, solutions to these problems have been extensively …

Hole-cleaning optimization is one of the major challenges while drilling long-reach
horizontal wells. Accumulation of cuttings can affect the equivalent circulating density (ECD) …

A coupled computational-fluid-dynamics/discrete-element-method (CFD/DEM) theory is
developed to simulate the transportation of cuttings in an inclined-slimhole annulus. In this …

Improper cleaning of the horizontal and deviated wellbores is one of the major problems
encountered during drilling process. Cuttings bed thickness is a key parameter to determine …

Poor transport of cuttings in horizontal sections of small-bore well holes leads to high torque
and increases the risk of the drill becoming stuck, reducing its service life and posing a …

Cuttings accumulation in horizontal wells has become an important engineering problem. In
this research, the influence of normal drill pipe and cuttings removal device on debris …

Underbalanced drilling is one of the drilling methods for better drilling according to its
advantages. Cuttings transport effects on cost, time, and quality of oil/gas wells in drilling …