Effect of multi-walled carbon nanotubes to improve hydrocarbon wells annular clearance space
Subject Areas :Mohammad سلیمانی 1 , سعیده رعیت دوست 2
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Keywords: Drilling Fluids Mud lifting capacity Drilling additives drilled cuttings viscosity ,
Abstract :
Proper drilling fluids has vital role for achieving to hydrocarbon reservoirs by using Drilling operation. Some important problems such as friction, stuck pipe, slow drilling rate, high torque and drag, lost of materials, density variation of mud can be happened due of poor hole annulus and cuttings down falling that induce expensive drilling. Various drilling fluids have been widely used in the wells drilling to improve lifting capacity of drilled cuttings. In this paper, the experimental results have been studied that conducted on effect of Multiwall Carbon Nano tubes (MWNTs) as additives for lifting capacity of water based mud. The effect of Useful parameters such as amount of MWNTs used, cutting size and mud annular velocity on the drilling fluid cleaning capacity have been studied. The results show that lifted cuttings increase as the amount of MWNTs added increases. MWNTs associated with water based mud displays the stability against base mud since surface forces easily balance the gravity force and attached to drilled cuttings, resulting in increase of drag force acts to drilled cuttings and easily lifted cuttings to the surface. The MWNTs also will improve viscosity which will significantly increase carrying capacity of the mud. For small and medium cuttings, the improvement relatively simplified compare to the big cuttings. The impact will significantly