Downhole tool systems are used during drilling operations for multiple purposes. This session presents papers that discuss three downhole tool systems that apply cutting-edge technology. The first paper presents a 4D radar system to display wellbore geometry while drilling a well, the following one shows the experience from drilling more than a hundred wells using wired drillpipe that resulted in risk reduction and drilling performance enhancement, and the last paper of the session covers a system for detecting stringer that substantially minimizes the invisible lost time during reaming operations.