When planning a workover, Coiled Tubing has become more indispensable due to its ability to accomplish a wide range of tasks yet remain economical affordable.
As wells are drilled deeper and the radial displacement of deviated wells increases, the question arises whether CT can still be utilized. Coiled Tubing is commonly run to 18000 ft in several places around the world. However, wells are now planned with measured depths of 30000 ft, and radial displacements of up to 25000 ft.
There are multiple reasons for drilling wells to such depths:
By drilling wells offshore with a larger radial displacement, more wells can be completed from a single platform, and less platforms may be required. In deep water, this provides a substantial cost saving.
Similarly, onshore applications include minimizing environmental liabilities by directional drilling multiple wells from one location.