TY - SER AU - McLellan,W. AU - Hough,S. AU - Ferguson,M. AU - McKay,G. AU - Hough,S. AU - Ferguson,M. AU - McKay,G. TI - Harding field:North Sea success story: Part 3-Use of drillstring vibration analysis systems proved helpful in lowering drilling costs. They enabled engineers to identify areas where steps could be taken to minimize destructive vibrations ER -