Results 151 to 160 of about 21,226 (204)
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Calculation of Fatigue Capacity for a Subsea Wellhead Connector
Volume 2B: Structures, Safety, and Reliability, 2020Abstract In the 2019 version of DNVGL-RP-C203 Fatigue Design of Offshore Steel Structures, significantly improved methods have been added on how to establish M-N curves representing the fatigue resistance of preloaded connectors subject to cyclic bending.
Per Osen +3 more
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Evaluation of Stress Distribution in Subsea Wellheads Installed in Caisson
SPE/IADC International Drilling Conference and Exhibition, 2023Abstract The wellhead is a pressure containing vessel at the top of well and acts as the mechanical connection between well and blowout preventer (BOP), or Christmas tree. Wellheads in subsea wells are subjected to dynamic loading, and consequently fatigue damage, whenever a riser connects a well to a floating vessel.
Lucas Cantinelli Sevillano +3 more
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BOP and Wellhead Protection/Subsea Arctic Caisson
Offshore Technology Conference, 1983ABSTRACT This paper describes the equipment and procedures for economic placement of a 20-foot diameter caisson in the Arctic sea floor for the purpose of placing the well head and Blow Out Preventer (BOP) stack below the sea floor to avoid ice damage.
G.A. Logsdon, A.J. Field
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Development and Implementation of a Universal Subsea Wellhead System
SPE/IADC Drilling Conference, 1989ABSTRACT The use of exploration and appraisal wells in the development of offshore fields is essential in areas where the majority of new discoveries are likely to be classified as marginal. The initial selection of subsea wellhead equipment can dictate the viability of utilising the well at a later stage.
C.E. Dykes, H.P. Hopper, R.G. Jones
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An Overview of the Zinc Subsea Tree and Wellhead System
Offshore Technology Conference, 1993Abstract Although deep water drilling systems and methods are already fairly welldeveloped as a result of exploration in deep water, as yet there is relativelylittle industry experience with deep water completions. The technical andeconomic challenges of deep water production systems are even greater whenmulti-well ...
T.L. McInturff, G.N. Gist
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Jack-Up Drilling on Conventional Subsea Wellheads
SPE Offshore Europe Oil and Gas Conference and Exhibition, 2013Abstract Throughout the 1970s, 1980s and 1990s, many relatively shallow-water wells were drilled at water depths less than 600 ft. (183M) utilizing conventional Semi-submersible Rigs, Subsea wellheads and/or subsea templates. A goodly portion of this drilling was done in the North Sea, in both the Norwegian and UK sectors.
Johnnie Kotrla, Ray Cummins
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Subsea Wellhead System Verification Analysis and Validation Testing
Offshore Technology Conference, 2014As oil and gas drilling and production operations move into much deeper waters and harsher environments, there is ever increasing demand for development of the next generation of tools and technology to meet these challenges. As a critical barrier between the wellbore fluid and the environment, subsea wellhead systems are an important part of the ...
Jim T. Kaculi, Bruce J. Witwer
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Design of a semiconductor thermoelectric generator for remote subsea wellheads
IEE Proceedings - Electric Power Applications, 1995Thermoelectric generators use the Seebeck effect to produce electrical power from a temperature difference. A device using semiconductor modules has been designed to operate on this principle to generate the power required at a subsea wellhead for instrumentation and valve operation. The hot junction would be mounted on the underwater pipe carrying the
D.W. Auckland +4 more
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Requirements On Fibre Optic Sensors For Wellhead Monitoring Subsea
SPIE Proceedings, 1986This paper presents the requirements on fibre optic sensors for subsea wellhead monitoring. A possible advantage of fibre optics is increased reliability of the monitoring system. However, to achieve this a substantial amount of development and testing has to be performed.
Arne Berg +3 more
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A Simplified Methodology for Comparing Fatigue Loading on Subsea Wellheads
Volume 4B: Pipeline and Riser Technology, 2013This paper presents a simplified way of comparing the fatigue load on different subsea wells. The simplest comparison is done by accumulating the number of days BOP has stayed connected to the wellhead. The wellhead fatigue load is however heavily dependent on the vessels used, water depth and weather while connected to the well.
Harald Holden +2 more
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