The experience of the use of CT units at Russian and foreign fields for more than last ten years has proved a high efficiency of this equipment and related technologies. The use of special equipment, modern materials and reagents as well as various downhole instruments for CT well service allows expanding and improving various technological operations, from sand washing to fishing. Service companies use their own or modernized technologies applied to specific working conditions of individual sites and customer’s requirements. The current working conditions include competition, crisis situation in the world and in the industry. All of it requires lower services costs and shorter terms with improved quality and advanced operations. One of the most important aspects of CT performance is reliable and comparatively cheap downhole tools providing for the necessary range of operations.