Method for riser string handling and an offshore drilling vessel

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United States of America Patent

PATENT NO 9988856
SERIAL NO

15648108

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Abstract

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The present invention relates to a method for riser string handling on an offshore drilling vessel (1), the offshore drilling vessel comprising a multiple firing line hoist system, a riser tensioner system (50) arranged in the second firing line, and a suspended riser transfer device (60). The method comprising the steps of lowering a riser string in the first firing line, and simultaneously assembling and preparing a riser tensioner system in the second firing line, wherein the riser hang-off assembly displaces the riser string, leaving the top end of the riser string exposed, from the first firing line to the second firing line to be connected to the riser tensioner system.

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Patent Owner(s)

  • ITREC B.V.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Roodenburg, Joop Delft, NL 237 1647
Wijning, Diederick Bernardus Schiedam, NL 100 471

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