Results 211 to 220 of about 916,843 (300)

Nondeterministic Analysis of a Marine Riser

Offshore Technology Conference, 1973
ABSTRACT This paper presents some significant results of analytical investigations of the effect of various problem parameters on the nondeterministic response of a marine riser to random wave forces and deterministic steady current forces. It is shown that the response to random wave forces is highly dependent upon
T.C. Tucker, J.P. Murtha
openaire   +1 more source

Scraping Assessment of Offshore Marine Risers

Offshore Technology Conference, 2023
Abstract The engineering assessment in this paper provides the recommendations for the minimum wall thickness selection of marine riser pipeline and their ability to allow the passage of in-line instrument scraper. The assessment was conducted considering two criteria: First, the minimum wall thickness for riser is evaluated against the ...
Shadid Ayedh Alnutifat, Feras Khalid Alfosail, Qasim Saleem, Abdulrahman Saleh Alshammari, Mohammad Salem Al khoufi, Mousa Rashed Harbi   +5 more
openaire   +1 more source

Hydrodynamic Tests on Marine Risers

Offshore Technology Conference, 1982
Abstract This paper presents experimental techniques and resultant data from an ongoing programmed of large scale laboratory tests on marine risers in waves. The experiments are being carried out in the No. 3 tank of the National Maritime Institute in England which has a water depth of 25 ft (7.6 m).
George G. Hartnup, Robert G. Airey, Peter Wilkinson, Minoo H. Patel, Surinder Sarohia   +4 more
openaire   +1 more source

Marine riser failure analysis for offshore conventional drilling and managed pressure drilling operations

, 2021
The objective of this paper is to present an analysis of marine riser integrity in conventional and Controlled Annular Mud Level (CALM) offshore drilling operations.
T. Nguyen, E. Al-Safran
semanticscholar   +1 more source

Dynamic response of marine risers

Engineering Structures, 1989
Abstract The dynamic response of marine risers to both regular and random waves is obtained in the time domain using a time marching numerical integration scheme to solve the equation of motion. For random sea states, time histories of sea surface elevation, water-particle kinematics and vessel top motion are simulated by a harmonic superposition ...
S. Ahmad, T.K. Datta
openaire   +1 more source

Stabilization and Decay Rate Estimation of Nonlinear Flexible Marine Riser System With the Rotational Inertia Under Nonlinear Boundary Controls

IEEE Transactions on Automatic Control
This article investigates the boundary stabilization of a flexible marine riser system that takes rotational inertia into account. This system is described using a nonlinear partial differential equation under the nonlinear controls.
Yi Cheng, Yuexi Zhang, Yuhu Wu, Bao-Zhu Guo   +3 more
semanticscholar   +1 more source

Upper Marine Riser Package

Offshore Technology Conference, 1986
ABSTRACT A new integrated riser tensioning system is presented. The system unitizes upper riser components into a compact package, and uses the slip joint as the support structure for the riser tensioning cylinders. The system is called the Upper Marine Riser Package (UMRP).
J.S. Lim, J.R. Pfeifler
openaire   +1 more source

Probabilistic Dynamical Analysis of a Marine Riser

1983
This paper presents numerical techniques of modal and spectral probabilistic analysis applied to the study of vibrations of a marine riser. The latter is fixed to a tethered buoyant platform (or tension leg platform) and can be considered as a beam with variable normal force.
De Wilde, W., Narmon, B.
openaire   +2 more sources

Vertical Dynamics of Marine Risers

Offshore Technology Conference, 1984
ABSTRACT A study of the vertical dynamics of marine riser-load systems has been performed to determine the amplitude of dynamic forces and displacements caused by heave action. The analysis predicts circumstances under which slackening or compression, and subsequent failure of a riser can occur ...
W.R. Azpiazu, V.N. Nguyen
openaire   +1 more source

Study on the hydrodynamic characteristics of a marine riser under periodic pulsation disturbance

Ocean Engineering, 2021
In this paper, the hydrodynamic forces and vortex distributions of a riser subjected to a non-uniform flow generated by an upstream oscillating wing structure are simulated using high-precision code Incompact3d combined with immersed boundary method. The
Wenquan Wang, Zhiqiang Yu, Yao Gao, Jianjie Luo, Wenguang Cao   +4 more
semanticscholar   +1 more source