نتایج جستجو برای: subsea structures integrity
تعداد نتایج: 521574 فیلتر نتایج به سال:
Abstract This is a conceptual work about the form-finding of hybrid tensegrity structure. The structure was obtained from combination arch-supported membrane systems and diamond-type systems. By combining these two types structures, resulting system features “tensile-integrity” property cables together with what we call “floating-bending” arches, term which intended to recall words “floating-co...
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...
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...
Reliability analysis of the electrical control system of a subsea blowout preventer (BOP) stack is carried out based on Markov method. For the subsea BOP electrical control system used in the current work, the 3-2-1-0 and 3-2-0 input voting schemes are available. The effects of the voting schemes on system performance are evaluated based on Markov models. In addition, the effects of failure rat...
Statoil has designed and tested dual diameter pipeline pigs to perform various tasks during operations, precommissioning and commissioning of the 710km 42"x28" Åsgard pipeline. The concepts developed have been put through a major design and testing program to demonstrate that the various functional requirements have been met. The paper describes the development process as well as field experien...
The results of a major research programme into the cost effective use of fibre reinforced composites offshore, undertaken as a Joint Industry Project by a consortium of universities and contractors are presented in this report. The report includes a detailed (54 page) summary of current offshore composite applications, followed by a review of the 43 projects conducted during the programme which...
This paper presents a quantitative reliability and availability evaluation method for subsea blowout preventer (BOP) system by translating fault tree (FT) into dynamic Bayesian networks (DBN) directly, taking account of imperfect repair. The FTs of series system and parallel system are translated into Bayesian networks, and extended to DBN subsequently. The multi-state degraded system is used t...
Numerous oil and gas (O&G) installations worldwide will need to be decommissioned in the near future. Complete removal of subsea structures is often default approach although some regions retain under rigs-to-reefs programs. Here, we reviewed published literature understand status global research on decommissioning, specifically identify gaps ecological knowledge. We estimated frequency...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید