Upper Ball Joint Force Variations due to Riser Tensioner and Vessel Motions-Part II: Analysis and Computer Simulation

T. J. Kozik; J. E. Lowell; A. Ertas

doi:10.1115/1.2905758

Upper Ball Joint Force Variations due to Riser Tensioner and Vessel Motions-Part II: Analysis and Computer Simulation

T. J. Kozik, J. E. Lowell, A. Ertas

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

An analysis of the variation of forces acting on the upper ball joint of a riser string due to the drill ship motion and riser tensioner dynamic has been conducted. The analysis includes the effect of breakaway torque on the tensioner sheaves while assuming vessel and upper ball joint motion to be independent. General equation for the tensioner cable forces and for the forces exerted on the riser upper ball joint by the ship joint-tensioner system derived in Part I are solved. The variation in the tensioner cable forces is compared to data generated in field operation.

Original language	English
Pages (from-to)	200-207
Number of pages	8
Journal	Journal of Energy Resources Technology, Transactions of the ASME
Volume	112
Issue number	3
DOIs	https://doi.org/10.1115/1.2905758
State	Published - Sep 1990

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abstract = "An analysis of the variation of forces acting on the upper ball joint of a riser string due to the drill ship motion and riser tensioner dynamic has been conducted. The analysis includes the effect of breakaway torque on the tensioner sheaves while assuming vessel and upper ball joint motion to be independent. General equation for the tensioner cable forces and for the forces exerted on the riser upper ball joint by the ship joint-tensioner system derived in Part I are solved. The variation in the tensioner cable forces is compared to data generated in field operation.",

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AB - An analysis of the variation of forces acting on the upper ball joint of a riser string due to the drill ship motion and riser tensioner dynamic has been conducted. The analysis includes the effect of breakaway torque on the tensioner sheaves while assuming vessel and upper ball joint motion to be independent. General equation for the tensioner cable forces and for the forces exerted on the riser upper ball joint by the ship joint-tensioner system derived in Part I are solved. The variation in the tensioner cable forces is compared to data generated in field operation.

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Upper Ball Joint Force Variations due to Riser Tensioner and Vessel Motions-Part II: Analysis and Computer Simulation

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