... Abstract Abrasion between the Coiled Tubing and the well completion has been a significant failure cause over the last three years. In excess of twenty-eight of these specific failures have been observed, cataloged and investigated. These failures resulted in a series of experimental studies...

... are essential to air/mist drilling. Although there are some theoretical models for prediction of cutting migration velocity and therefore the carrying capacity of cuttings, experimental studies are also essentially important because of the complexity of actual liquid, gas and solid multiphase flow in wellbore...

... Abstract The excessive friction pressure loss due to the small tubing diameter and the curvature (which believed to cause secondary flow) of coiled tubing (CT) often limits the maximum obtainable flow rate in CT operations. This paper presents an experimental study of drag reduction performance...