Results 11 to 20 of about 1,047 (208)
An intelligent recoil controller for riser system based on fuzzy control theory
International Journal of Naval Architecture and Ocean Engineering, 2022 Riser recoil control is a complicated nonlinear control problem. An intelligent control methodology is proposed to control the complicated riser recoil response based on fuzzy control theory. A dynamic nonlinear model of drilling riser/tensioner coupling
Xiuquan Liu, Na Qiu, Yuanjiang Chang
exaly +3 more sources
Petroleum Exploration and Development, 2013 For deepwater drilling riser system facing grounding risk in the South China Sea, a mechanical analysis model of deepwater drilling riser grounding accident was established.
Xiuquan Liu +2 more
exaly +3 more sources
Experimental and Numerical Study on the Elimination of Severe Slugging by Riser Outlet Choking
Energies, 2022 Severe slugging is an unstable multiphase flow pattern occurs in a pipeline riser with low gas and liquid flowrates. It is highly undesired in practical operation because of the pressure and mass flow oscillations induced.
Nailiang Li +3 more
doaj +1 more source
Frontiers in Sports and Active Living, 2022 In ski mountaineering, equipment and its interaction with the exercising human plays an important role. The binding, as the crucial connection between boot and ski, must ensure safe fixation during downhill skiing and a free moving heel when walking ...
Michael Lasshofer +5 more
doaj +1 more source
Journal of Applied Mathematics, 2012 Fatigue analysis of structural components such as helix tensile armors and steel tubes is a critical design issue for dynamic umbilicals and flexible pipes.
Geir Skeie +2 more
doaj +1 more source
Journal of Clinical Sleep Medicine, 2010 A78-year-old man complains of early morning awakenings. History reveals early awakenings started approximately 1 year ago, 7 months after his wife of 35 years died. He admits the first few months were difficult, but for the past year he has fallen into a routine which includes shopping on line in the early morning, playing golf and cards with friends ...
Oluwole Onadeko, Kenneth S. Knox
openaire +1 more source
Dynamic Analysis of a Drillstring-Riser System Drilling in Deep Water
MATEC Web of Conferences, 2018 A mathematical model of a drillstring-riser system is developed to analyze the system dynamics when drilling in deep water. For the proposed model, a riser and a drillstring are combined as a pipe-in-pipe structure, along which the interactions between ...
Liao Maolin +4 more
doaj +1 more source
Interference Vibration Analysis of Drilling Riser-Production Riser Clusters in Deep Water
Shiyou jixie, 2022 As waves and ocean currents flow through drilling risers or production risers, there will be strong interference between risers and nearby fluid, resulting in more complicated vibration characteristics than isolated riser or dual-riser system.
Tian Deqiang +6 more
doaj
Shock and Vibration, 2020 Marine riser is a key equipment in offshore drilling operation, and failure of the riser can lead to drilling moratorium; in severe cases, it may cause oil and gas leaks.
Fengde Wang +4 more
doaj +1 more source
Drift-off warning limits for deepwater drilling platform/riser coupling system
Petroleum Exploration and Development, 2016 The drift-off dynamic model of deepwater drilling platform and riser coupling system was established. An analysis method on drift-off warning limits of deepwater drilling platform and riser coupling system was proposed, and a deepwater drilling platform ...
Xiuquan LIU +5 more
doaj +1 more source