نتایج جستجو برای: subsea pipeline
تعداد نتایج: 30273 فیلتر نتایج به سال:
Although high oil prices have attributed bad habits in a matter of “doing things right” rather than “doing the right things” in subsea productions, a continuous price drop renewed the need for cost cutting in recent years. This has been the case for subsea companies, where previous research found significant cost and schedule overruns due to late design changes. A large amount of these late des...
The valve-controlled hydraulic cylinder system (VCHCS) is commonly used for actuators such as manipulators in deep-sea equipment, whose working performance crucial to subsea tasks. Affected by the ambient pressure introduced compensator, viscosity of oil increases significantly. On this basis, changes further when flowing slender pipeline, making pipeline loss substantially increase and subsequ...
The rates of subsea permafrost degradation and occurrence of gas-migration pathways are key factors controlling the East Siberian Arctic Shelf (ESAS) methane (CH4) emissions, yet these factors still require assessment. It is thought that after inundation, permafrost-degradation rates would decrease over time and submerged thaw-lake taliks would freeze; therefore, no CH4 release would occur for ...
As the offshore market faces deepwater production challenges, the oil and gas industry is investing in new technologies to bring down the costs in the subsea fields exploitation. A breakthrough technology solution is the development of a subsea centrifugal compressor module installed on the seabed, transporting the wellstream to a central platform or directly to shore. The typical application o...
Environmental safety issues are of particular importance when we design and operate underwater transport systems. To ensure the systems function safely, special to monitor their condition being created. Underwater pipeline monitoring should continuously detect prevent emergency pre-emergency situations in a timely manner. The purpose this article is demonstrate possibility using mathematical mo...
The occurrence of the severe slugging phenomenon in multiphase pipelines can cause serious and troublesome operational problems within the receiving process facilities. This paper describes: the pipeline operability studies on the Dunbar to Alwyn multiphase pipeline regarding riser-induced severe slugging; the control scheme selected to prevent this phenomenon; and the subsequent operating expe...
In order to meet a high reliability requirement of subsea drilling, a redundant software system for subsea Blowout Preventers (BOP), including control logics, HMI programs, remote access and redundant databases are developed. The Bayesian networks for control logics, HMI programs and redundant databases are built and then the whole Bayesian networks are established. The quantitative reliability...
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