FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2019295060> ?p ?o ?g. }

• W2019295060 abstract "Abstract Emergency disconnect of a deepwater drilling riser filled with a heavy mud column creates the potential for collapse of the drilling riser. The concern for collapse is traditionally focused on the idea that the pressure equalization process at the bottom of the riser causes the mud column to U-Tube such that the heavy mud column dropping will create a large region of evacuated riser. External seawater pressure applied to evacuated riser defines this collapse condition. The maximum water depth for the evacuated region, and thus the maximum collapse-pressure, will occur about 30 to 90 seconds depending on mud weight and water depth. Riser Fill Valves are sometimes used to prevent evacuation of the riser. The authors have found that the U-Tube effect is not the only source for creation of a high pressure collapse condition. At the instant the mud column is released, a high differential pressure exists at the bottom of the riser. This differential could be as high as 3,000 to 4,000 psi for a 10,000 foot riser. The differential pressure will tend to rapidly equilibrate across the opening thus creating a negative pressure wave which will propagate up the riser at sonic speed. The phenomena is a classical fast-opening waterhammer. At some intermediate depth, the outer and inner pressures combine to create a maximum magnitude collapse pressure. This condition develops in a matter of seconds and it is developed whether or not a riser fill valve is in the system. We show that this collapse pressure is nearly equal to the collapse pressure caused by the U-Tube effect. We conclude that the riser fill valve is not sufficient to prevent riser collapse pressure resulting from the fast-opening waterhammer phenomenon. Introduction Emergency disconnect of the drilling riser may occur because of drift-off, drive-off or weather. Since the well must be cleared quickly, the emergency disconnect does not provide sufficient time to circulate out the mud and fill the riser with seawater. Dumping the mud from the deepwater riser during emergency disconnect is in many cases standard operating procedure because it has been shown that if the contents are retained, the dynamic riser loads may be significantly magnified while trying to suspend the deepwater riser1. It has long been recognized that following emergency disconnect of a deepwater riser and subsequent mud column release, a heavyweight mud may evacuate the riser to a sufficient depth that a riser pipe collapse condition can be created by the external sea pressure applied to the evaluated portion of the riser. The physics that control the draining of the riser and the depth at which the evacuation occurs is normally called the U-Tube effect. This is a simple matter of equilibrating the static head of the riser contents with the ea water at the bottom of the riser and calculation of the maximum external pressure is similarly simple. The way industry has dealt with the possibility of collapsing the riser due to this effect is to include in the riser a component which is called the Riser Fill Valve (RFV)." @default.
• W2019295060 created "2016-06-24" @default.
• W2019295060 creator A5014639346 @default.
• W2019295060 creator A5062374850 @default.
• W2019295060 creator A5080805633 @default.
• W2019295060 date "1998-05-04" @default.
• W2019295060 modified "2023-09-27" @default.
• W2019295060 title "Riser Collapse Pressures Resulting from Release of Deepwater Mud Columns" @default.
• W2019295060 doi "https://doi.org/10.4043/8853-ms" @default.
• W2019295060 hasPublicationYear "1998" @default.
• W2019295060 type Work @default.
• W2019295060 sameAs 2019295060 @default.
• W2019295060 citedByCount "3" @default.
• W2019295060 countsByYear W20192950602022 @default.
• W2019295060 crossrefType "proceedings-article" @default.
• W2019295060 hasAuthorship W2019295060A5014639346 @default.
• W2019295060 hasAuthorship W2019295060A5062374850 @default.
• W2019295060 hasAuthorship W2019295060A5080805633 @default.
• W2019295060 hasConcept C111368507 @default.
• W2019295060 hasConcept C121332964 @default.
• W2019295060 hasConcept C122846477 @default.
• W2019295060 hasConcept C127313418 @default.
• W2019295060 hasConcept C127413603 @default.
• W2019295060 hasConcept C162284963 @default.
• W2019295060 hasConcept C171675602 @default.
• W2019295060 hasConcept C187320778 @default.
• W2019295060 hasConcept C25197100 @default.
• W2019295060 hasConcept C2777551473 @default.
• W2019295060 hasConcept C2778772573 @default.
• W2019295060 hasConcept C2781143826 @default.
• W2019295060 hasConcept C2984663118 @default.
• W2019295060 hasConcept C57879066 @default.
• W2019295060 hasConcept C78519656 @default.
• W2019295060 hasConcept C78762247 @default.
• W2019295060 hasConceptScore W2019295060C111368507 @default.
• W2019295060 hasConceptScore W2019295060C121332964 @default.
• W2019295060 hasConceptScore W2019295060C122846477 @default.
• W2019295060 hasConceptScore W2019295060C127313418 @default.
• W2019295060 hasConceptScore W2019295060C127413603 @default.
• W2019295060 hasConceptScore W2019295060C162284963 @default.
• W2019295060 hasConceptScore W2019295060C171675602 @default.
• W2019295060 hasConceptScore W2019295060C187320778 @default.
• W2019295060 hasConceptScore W2019295060C25197100 @default.
• W2019295060 hasConceptScore W2019295060C2777551473 @default.
• W2019295060 hasConceptScore W2019295060C2778772573 @default.
• W2019295060 hasConceptScore W2019295060C2781143826 @default.
• W2019295060 hasConceptScore W2019295060C2984663118 @default.
• W2019295060 hasConceptScore W2019295060C57879066 @default.
• W2019295060 hasConceptScore W2019295060C78519656 @default.
• W2019295060 hasConceptScore W2019295060C78762247 @default.
• W2019295060 hasLocation W20192950601 @default.
• W2019295060 hasOpenAccess W2019295060 @default.
• W2019295060 hasPrimaryLocation W20192950601 @default.
• W2019295060 hasRelatedWork W118627051 @default.
• W2019295060 hasRelatedWork W2046744922 @default.
• W2019295060 hasRelatedWork W2052012994 @default.
• W2019295060 hasRelatedWork W2075187463 @default.
• W2019295060 hasRelatedWork W2082948304 @default.
• W2019295060 hasRelatedWork W2089328180 @default.
• W2019295060 hasRelatedWork W2353913833 @default.
• W2019295060 hasRelatedWork W2359520113 @default.
• W2019295060 hasRelatedWork W2374229955 @default.
• W2019295060 hasRelatedWork W2894408231 @default.
• W2019295060 isParatext "false" @default.
• W2019295060 isRetracted "false" @default.
• W2019295060 magId "2019295060" @default.
• W2019295060 workType "article" @default.