The use of coiled-tubing systems has proven practical and cost effective for many well intervention procedures. With the development of better quality, longer, and larger-sized coiled- tubing systems, the variety of processes available for using coiled-tubing systems continues to rise rapidly. One application is the removal of heavy solids through a deviated wellbore section, which causes immense difficulties to the operator. Even when the particulate drop rate through the carrier fluid is slow, this velocity is increased by up to ten times in deviated wellbore sections; which can cause failure, and even worse, sticking of tubing. A method that is successful in counteracting this phenomenon is discussed in this paper. The need for increased flow rates, meaning the use of larger coiled-tubing systems, is not necessary for this method; thus allowing effective cleanup through smaller production tubing.
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