If the rams close before the wireline is positioned in the line groove, the cable can be trapped and damaged, thus reducing the safety and integrity of the operation. On closure, the new ram provides a positive alignment for the wireline. Special guides on either side of the inner seal move the wireline so that the section of line contacting the seal is centered and parallel to the BOP axis. The multiline inner seals can be used with the guide to create a ram that is able to seal around any line from 0.092 to 0.312 in. in diameter. The guide has been demonstrated in field trials, and the multiline seal has been used in the North Sea, Gulf of Mexico, and Asia Pacific.
Field records show that the tubing rotators extend tubing life.
No additional power source is required. Manual, electric, and hydraulic systems also can be used. The rotators are designed to remain in place during well-workover operations. Energy Systems' Rodec tubing rotator. These systems and their components were developed for drilling in pay zones, especially in horizontal wells.