Accuracy of the Taut-Line Position-Indicator for Offshore Drilling Vessels

[+] Author and Article Information
R. B. Adams

Esso Production Research Co., Houston, Texas

J. Eng. Ind 90(1), 161-171 (Feb 01, 1968) (11 pages) doi:10.1115/1.3604591 History: Received May 19, 1967; Online August 25, 2011


The taut-line system measures horizontal position of a drilling vessel by using trigonometric relations with the assumption that a steel line is essentially straight from vessel to sea floor. This paper examines mathematically the accuracy of this assumption under a variety of operational circumstances. A convenient method to estimate error as a function of equipment and environment parameters is developed. Further, an on-site procedure is suggested for estimating and reducing error by use of only the taut-line system itself.

Copyright © 1968 by ASME
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