Development of Cylinder Type Concrete FPSO With Tangerine-Shaped Cross-Section

2018 ◽  
Author(s):  
Jae-Young Cho ◽  
Jong-Heon Park ◽  
Jung J. Kim
Keyword(s):  
Cross Section ◽  
Optimization Design ◽  
Oil And Gas ◽  
Tensile Force ◽  
Concrete Structures ◽  
Oil And Gas Industry ◽  
Sensitivity Study ◽  
Offshore Platforms ◽  
Exterior Wall ◽  
Shaped Cross Section

Concrete platforms have proven to be a viable offshore solution for deep-water projects according to the documented performance of over 40 years [1]. Since concrete has resistance to seawater corrosion, reduced maintenance costs and motions, concrete structures have become attractive to the offshore oil and gas industry [2, 3]. There are many floating concrete structures such as barge, ship, platform and LNG/LPG terminals. While most concrete offshore platforms are the fixed structures, floating concrete platforms have been used for drilling, extraction /storage and production units for oil and gas including heavy lifter. There are two representative floating concrete facilities on the Norwegian shelf, Troll B and Heidrun A [4, 5]. Troll B is the first concrete semi-submersible product unit and Heidrun A is the floating concrete tension leg platform. The concrete FPSO (Floating Production Storage and Offloading), however, was assessed to be inferior to the steel FPSO in respect of feasibility. In this study, an optimization design of the cross-section for cylinder shaped concrete platform is presented in order to promote the feasibility of a concrete hull for an FPSO. Optimal aspect ratio (depth to diameter) with economic analysis is examined and tangerine-shaped section which can utilize the excellent material properties of the concrete in compressive strength is developed. Exterior wall having a small curvature are applied to transmit the load to interior bulkhead. A parametric sensitivity study was conducted to find the optimal curvature of the exterior wall. Subsequently, an arch-shaped wall is applied to center wall in order to improve the upper and lower tension force caused by bending moment. The tendon was placed in the center of any cross-section, taking into account the tensile force that can be caused by additional asymmetric loads. The effect of tangerine shaped cross-section can be clearly identified by comparing the results with the circular shaped cross-section.

Optimization Design of a 500 kN Workover Rig Mast after Computer Simulated Overload Test

2015 ◽  
Vol 809-810 ◽  
pp. 932-937
Author(s):  
Lavinia Silvia Stanciu ◽  
Ioan Popa
Keyword(s):  
Computer Simulation ◽  
Cross Section ◽  
Optimization Design ◽  
Oil And Gas ◽  
Gas Wells ◽  
Dead Weight ◽  
State Of Stress ◽  
Oil And Gas Wells ◽  
Hoisting System ◽  
Shaped Cross Section

The 500 kN mast, which is part of a workover rig used for interventions and overhauling works for oil and gas wells, is a spatial multiple indeterminate structure made of many bars, with rigid nodes. The aim of this paper is to determine, through computer simulation of overload test, the state of stress and displacements for the existing construction and to find an improved solution. The overload test is experimentally realized on specialized stands and involves the mast’s loading with the maximum hook load multiplied by a safety factor of 1.4 and, in addition, with the dead weight, the hoisting system weight, and with the corresponding forces due to the draw works drum socket and the blind end. Since this is a prototype construction made of structural steel rectangular pipes and profiles as L, I, U-shaped cross section, such an analysis is necessary to ensure the mast’s and rig’s safety during functioning.

Value Co-Creation Practices in the Decommissioning of Offshore Platforms: A Case Study Approach

2021 ◽  
pp. 239496432110320
Author(s):  
Francesca Loia ◽  
Vincenzo Basile ◽  
Nancy Capobianco ◽  
Roberto Vona
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Future Research ◽  
Offshore Platforms ◽  
Gas Industry ◽  
Study Approach ◽  
Collaborative Interactions ◽  
Exploratory Approach ◽  
Italian Context

Over the years, value co-creation practices have become increasingly more important by supporting collaborative interactions and the achievement of sustainable and mutual competitive advantage between the ecosystem’ actors. In this direction, the oil and gas industry is proposing a sustainable re-use of offshore platforms based on value co-creation and resources exchange between the actors involved. According to this consideration, this work aims at re-reading the decommissioning of offshore platforms in the light of value co-creation practices, trying to capture the factors that governments and companies can leverage to pursue a sustainable development of local communities. To reach this goal, this work follows an exploratory approach by using, in particular, the case study. Specifically, one of the most notably projects in the Italian context have been chosen, the Paguro platform, in order to provide empirical insights into the nature of these value co-creation processes. Five value co-creation practices have been identified which highlight the importance of synergistic efforts of institutions, companies and technology-based platforms for improving the ability to co-create and capture value in the process of decommissioning. This exploratory work establishes a foundation for future research, and offers theoretical and managerial guidance in this increasingly important area.

Three-Phase Flow Profile Determination of A Horizontal Well in Offshore by Tracer Technology

2021 ◽  
Author(s):  
Alexander Katashov ◽  
Igor Novikov ◽  
Evgeny Malyavko ◽  
Nadir Husein
Keyword(s):  
Oil And Gas ◽  
Horizontal Wells ◽  
Oil And Gas Industry ◽  
World Market ◽  
Dynamic Mode ◽  
Flow Profile ◽  
Offshore Platforms ◽  
Field Development ◽  
Coiled Tubing ◽  
Three Phase

Abstract Over the past few years, the oil and gas industry has faced a situation of high fluctuations in hydrocarbon prices on the world market. In addition, the trend for the depletion of traditional hydrocarbon reservoirs and the search for new effective solutions for the management and control of field development using horizontal and multilateral wells is still relevant. The most common method for horizontal wells testing is production logging tools (PLT) on coiled tubing (CT) or downhole tractor, which is associated with HSE risks and high cost, especially on offshore platforms, which limits the widespread use of this technology. The solution without such risks is the method of marker well monitoring, which allows obtaining information about the profile and composition of the inflow in a dynamic mode in horizontal wells without well intervention. There are several types of tracer (marker) carriers and today we will consider an approach to placing marker monitoring systems as part of a completion for three-phase oil, water and gas monitoring.

Joining Composite Pipes Using Hybrid Heat-Activated Coupling and Adhesive Bonding

2001 ◽  
Author(s):  
Guoqiang Li ◽  
Su-Seng Pang ◽  
Randy J. Jones ◽  
Jack E. Helms ◽  
Eyassu Woldesenbet
Keyword(s):  
Internal Pressure ◽  
Adhesive Bonding ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Offshore Platforms ◽  
Gas Industry ◽  
Critical Technology ◽  
Offshore Oil And Gas ◽  
Composite Pipes ◽  
Offshore Oil

Abstract Deepwater activities are the future of the Offshore Oil and Gas Industry. Huge reserves have been located in the Gulf of Mexico as well as off the Coast of West Africa and Brazil. The development of floating production platforms and vessels offers challenges to the facilities engineer who must consider new materials to meet stringent topsides weight limitations. A critical technology for facilities piping in offshore platforms is joining technique. This paper discusses the development of a hybrid joining approach by using heat-activated coupling and adhesive bonding. The technique procedure is presented via specimen fabrication. A total of eleven coupled specimens are prepared and evaluated using standardized internal pressure tests. The feasibility of this new joining technique in offshore piping is discussed based on the internal pressure test results.

Guest Editorial: Data Are the Sustainable Secret to a More Profitable Future

2021 ◽  
Vol 73 (03) ◽  
pp. 10-11
Author(s):  
Francois Laborie
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Energy System ◽  
Offshore Platforms ◽  
Sustainable Operations ◽  
Gas Industry ◽  
Use Of Data ◽  
The World ◽  
Oil And Gas Operations ◽  
Bounce Back

I was recently asked if I thought that the oil and gas industry would bounce back once the world is rid of the coronavirus. It was a question prompted by the sharp decline in activity in several oil-and-gas-dependent sectors such as transportation. The coronavirus and its subsequent impact on the price of oil have injected a sense of uncertainty into the industry, prompting many to speculate as to what will happen once the pandemic abates. Rather than asking if we’ll bounce back, I’d prefer we focus on how fast we can learn from the challenges and move forward. The oil and gas industry has come to a point at which there is no turning back. The pressure to transform was mounting long before COVID-19 entered our vocabulary. Recent events only highlight the urgency of it. It is an urgency that stems from new regulation, increasing financial pressure, and growing societal expectations. From the Paris Agreement to the UN’s Sustainable Development Goals, the world has come to terms with the fact that our planet is not immune to human impact and that we need to take measures to mitigate our damage to it. For oil and gas, that means transformation, in both the short and long term, all the while remaining profitable and competitive. In the shorter term, the world is not able to fill the void that going completely fossil-free would create. Oil and gas are still key components of the global energy system, driving both social and economic development in much of the world. That means that while our dependency remains, the extraction of this natural resource and its subsequent processing need to be done as safely, efficiently, and as carbon-friendly as possible. That’s where technology stands to play a pivotal role. For oil and gas operations, achieving near-term, sustainable success will require three things. Optimizing the use of data for increased transparency. There are savings to be had across oil and gas operations. In 2017, global management consultant McKinsey & Company reported that the industry’s performance gap was around $200 billion and that most offshore platforms are only running at 77% of their maximum potential. This means that there is significant ground to be gained. Today, we have the tools available to capture this value, to extract the data, and identify where there is waste and where there is opportunity. This kind of accountability is possible only if you are transparent with your data, which requires the right tools to uncover it, understand it, and share it. Several oil and gas players today have already cracked the code to learn how to use data to ensure more sustainable operations. By gaining an understanding of the inherent power of data flowing through their operations and by embracing transparency around that data, they can harness it to their advantage. Norway-based oil and gas operator Aker BP is one such example. Working with Cognite, it recently implemented machine learning to improve water- contamination detection, saving $6 million per year and reducing the company’s environmental impact. The massive savings for both the companies and the environment was achieved with the smarter and more open use of data.

Efficient Offshore Wind Turbine Foundations

2005 ◽  
Vol 29 (5) ◽  
pp. 463-469 ◽  
Author(s):  
Anders Moller
Keyword(s):  
Wind Turbine ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Offshore Platforms ◽  
Gas Industry ◽  
Future Design

In the oil and gas industry, the foundations of offshore platforms have, for decades, used the grouted technique. This technology has now been transferred into the offshore wind turbine industry. This paper gives details of the use of the technology in some of the first offshore windfarms in Europe and considers future design possibilities.

Redesign of a 500 kN Maximum Hook Load Workover Rig Mast for Operating Conditions and Wind Velocity of 70 km/h

2015 ◽  
Vol 809-810 ◽  
pp. 926-931
Author(s):  
Lavinia Silvia Stanciu ◽  
Ioan Popa
Keyword(s):  
Structural Steel ◽  
Wind Velocity ◽  
Cross Section ◽  
Oil And Gas ◽  
Operating Conditions ◽  
Wind Pressure ◽  
Gas Wells ◽  
Industry Standards ◽  
Oil And Gas Wells ◽  
Shaped Cross Section

In the present paper is analyzed the stress level and the maximum displacements that occur in the elements of a mast of 500 kN maximum hook load under the action of wind with a 70 km/h velocity. The mast is a prototype which is equipping a workover rig used for interventions and overhauling works for oil and gas wells. The forces resulting from wind pressure on the exposed mast`s elements areas are calculated in accordance with the oilfield industry standards and distributed to all structure`s nodes, after it was modeled using the FEA software ANSYS. Being a new structure containing structural steel rectangular pipes and profiles as L, I, U-shaped cross section, this analysis is necessary in order to achieve the practical construction of mast and its safety during exploitation.

Fatigue Reassessment to Modern Standards for Life Extension of Offshore Pressure Vessels

2015 ◽  
Author(s):  
Emily Hutchison ◽  
John Wintle ◽  
Alison O’Connor ◽  
Emilie Buennagel ◽  
Clement Buhr
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Pressure Vessels ◽  
Life Extension ◽  
Offshore Platforms ◽  
Design Standards ◽  
Element Analysis ◽  
Gas Industry ◽  
Lack Of Information

Life extension of ageing assets is becoming increasingly important for the offshore oil and gas industry. Many pressure vessels in service have reached or are about to reach the end of their design lives, but their continued operation is required until the economic field life is exhausted. Many vessels in-service were designed over 30 years ago, when fatigue assessment was not required by the design standards. Therefore, fatigue reassessment is a critical part of the life extension process. This paper presents reassessment of a benchmark vessel as a case study for life extension of other similar vessels. Life extension assessments are costly and time consuming, often hindered by a lack of information and a lack of access to the vessels. By determining the commonality between a vessel and the benchmark vessel, it may be possible with suitable on-going in-service inspection to justify life extension of the vessel without the need for a full fatigue life extension reassessment in every case. The case study considered in this paper is a condensate flash separator vessel constructed in the early 70s which was in operation for 25 years; and is similar to many pressure vessels still in service on offshore platforms. The fatigue lives of key features of the vessel have been calculated and compared using different modern pressure vessel design codes, supported by finite element analysis.

scholarly journals Environmental genomics for benthic monitoring of North Sea oil and gas offshore platforms

2021 ◽  
Vol 4 ◽  
Author(s):  
Jan Pawlowski ◽  
Florian Mauffrey ◽  
Tristan Cordier ◽  
Laure Apothéloz-Perret-Gentil ◽  
Kristina Cermakova ◽  
...  
Keyword(s):  
Oil And Gas ◽  
De Novo ◽  
Ecological Status ◽  
Oil And Gas Industry ◽  
Marine Biodiversity ◽  
Morphological Identification ◽  
Offshore Platforms ◽  
Time Saving ◽  
Environmental Pressures ◽  
The Impact

During the last decade, considerable efforts have been undertaken to achieve a “good ecological status” of European coastal waters and ensuring the development of methodological standards for the evaluation of this status. However, the current routine biomonitoring implicates time-consuming and costly manual sorting and morphological identification of benthic macrofauna. In our study, we tested the performance of environmental DNA metabarcoding targeting microbial communities and meiofauna as an alternative to traditional macrofauna-based monitoring. We focused on environmental impact assessment of offshore oil and gas industry. We used three genetic markers (18S V1V2, 18S V9 and COI) to assess the environmental pressures induced by the platforms. All markers showed patterns of alpha and beta diversity consistent with morphology-based macrofauna analyses, significantly changing along distance gradients from the platforms. The impact of the operational discharges was also detected by the variation of biotic indices values, AMBI index showing the best correlation between morphological and eDNA datasets. Finally, the sediment physicochemical parameters were used to build a local de novo pressure index that served as benchmark to test the potential of a taxonomy-free approach. Our study demonstrates that metabarcoding approach outperforms morphology-based approach and can be used as a cost and time-saving alternative solution to the traditional morphology-based monitoring in order to monitor more efficiently the impact of industrial activities on marine biodiversity.

QFD&DFMA Application on an Oil/Water Separation Product

2012 ◽  
Vol 163 ◽  
pp. 211-216 ◽  
Author(s):  
Ti Lu ◽  
Yi Du Zhang
Keyword(s):  
Crude Oil ◽  
High Performance ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Manufacturing Cost ◽  
Offshore Platforms ◽  
Water Separation ◽  
Heavy Equipment ◽  
Alternative Materials ◽  
Alternative Designs

When oil fields become old, the proportion of water in crude oil will get higher and higher. Using a traditional bulk separator to extract the water from crude oil has many disadvantages: e.g. high pressure loss, low separation speed, heavy equipment and sensitive to direction. Caltec Ltd. has developed Wx-12, an innovative separator for the oil and gas industry. The device has been tested on offshore platforms and has shown high performance. Currently however, the manufacturing cost of the device is too high making it unlikely to be accepted by market. This project first used QFD to transform the user requirements of Wx-12 into engineering specifications. Then DFA & DFM methods were applied to Wx-12 in order to make it compact and reduce the manufacturing cost. An alternative design for Wx-12 unit was generated according to the results from QFD, DFA and DFM. Alternative materials were also considered to support the alternative designs. Finally alternative designs and alternative materials were verified with the engineers from Caltec Ltd..

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