Reentry Cone Guides Drill Pipe (IMAGE) U.S. National Science Foundation Caption A welder works on a "reentry cone" used to guide drill pipe into the ocean floor. Credit IODP Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.