Marine riser system

Details Marine riser system Marine riser system

1977-09-08

1980-01-29

Leppink, James A.

Wells

Submerged well

Submerged, buoyant wellhead or riser

166352, 175 6, E21B 712

Patent

active

041856945

ABSTRACT:
A marine riser system is provided which extends between a floating offshore platform and well means in a seabed formation and which has riser end portions connected in novel manner to the floating platform and to wellhead structure at the well hole. Each end portion of the riser is adapted to yield axially, laterally, and rotatively during movement of the riser relative to the platform and to the wellhead structure. Each end portion of the riser is provided with fulcrum or pivot contacts with hawse pipe carried by the platform and with hawse pipe or casing means provided in the wellhead structure. Bending stresses at the riser end portions are reduced at the platform and at the wellhead structure.

REFERENCES:
patent: 3142343 (1964-07-01), Otteman et al.
patent: 3163239 (1964-12-01), DeVries et al.
patent: 3440671 (1969-04-01), Smulders
patent: 3516488 (1970-06-01), Joubert et al.
patent: 3563042 (1971-02-01), Ryan
patent: 3601187 (1969-05-01), Tidwell
patent: 3602319 (1971-08-01), Graham et al.
patent: 3605413 (1971-09-01), Morgan
patent: 4053022 (1977-10-01), Mercier
patent: 4126183 (1978-11-01), Walker

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