Multiterminators for riser pipes

Details Multiterminators for riser pipes Multiterminators for riser pipes

1985-02-14

1987-11-24

Corbin, David H.

Hydraulic and earth engineering

Marine structure or fabrication thereof

166367, 403133, 405224, E21B 4301

Patent

active

047085258

ABSTRACT:
This invention is an improvement over the simple riser pipe terminator, which has been applied at the mudline and at the platform level, to resist very large stresses in the riser pipes when a vertically moored platform (VMP) or other similarly tethered structure is subjected to wind, tide and current. A second or short terminator is used with the terminator to form a multiterminator which results in the length and weight of the terminator assembly for a given site being greatly reduced from that of the prior art terminator. Thus, the cost of construction of the terminator assembly is drastically reduced with the use of our invention. Also disclosed is a novel bearing arrangement between the structure VMP and the terminator assembly.

REFERENCES:
patent: 939908 (1909-11-01), Greenlaw
patent: 3142344 (1964-07-01), Otteman et al.
patent: 4030310 (1977-06-01), Schirtzinger
patent: 4127005 (1978-11-01), Osborne
patent: 4130995 (1978-12-01), Osborne
patent: 4173360 (1979-11-01), Bergman et al.
patent: 4185694 (1980-01-01), Horton
patent: 4212561 (1980-07-01), Wipkink
patent: 4516881 (1985-05-01), Beynet et al.
"The Vertically Moored Platform, for Deepwater Drilling and Production"; by M. Y. Berman, K. A. Blenkarn, and D. A. Dixon; OTC Paper #3049, Copyright 1978 Offshore Technology Conference.
"Motion, Fatigure, and the Reliability Characteristics of a Vertically Moored Platform"; by P. A. Beynet, M. Y. Berman, and J. T. von Aschwege; OTC Paper #3304; Copyright 1978, Offshore Technology Conference.

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