 It is used to perform open hole drilling and milling operations.Common coiled tubing steels have yield strengths ranging from 55,000 PSI to 120,000 PSI so it can also be used to fracture the reservoir, a process where fluid is pressurized to thousands of psi on a specific point in a well to break the rock apart and allow the flow of product.Coil tubing can perform almost any operation for oil well operations if used correctly.