Installation of Conductor Supported Platform CSP at X Field

2021 ◽  
Author(s):  
Helmi Ngadiman
Keyword(s):  
Knowledge Sharing ◽  
Water Depth ◽  
High Accuracy ◽  
Development Project ◽  
North West ◽  
Technical Paper ◽  
Effective Strategies ◽  
Pile Installation ◽  
Lost Time ◽  
Crucial Part

Abstract This technical paper presents the offshore installation execution work of Conductor Supported Platforms (CSP) at ‘X’ field. The knowledge sharing was based on the successful installation of three (3) numbers of CSP for ‘X’ development project. The platforms were installed at approximately of 70m water depth and encountered technical challenges during offshore execution. ‘X’ field is located about approximately 45km North West of Miri, Sarawak. The CSPs were installed by Derrick Barge (DB) via double blocks crane upending method for the substructures and conventional lifting method for the topsides. The CSP was designed for 70 meters water depth with four (4) numbers of vertical legs, four (4) numbers of skirt piles, and one (1) number of pin pile. The weight of the topside was about 600MT, meanwhile the substructure was about 1100MT respectively. These CSPs marked as a pioneer in the installation of its kinds at 70m water depth in COMPANY. The concept required high accuracy of detailed offshore installation engineering. This configuration however had caused some challenges during installation. Among the major challenges were issues on the pin-pile verticality, substructure levelness and upending activities via double blocks crane upending method. The effective strategies were adopted to improve the on-bottom stability by installing pin pile prior to substructure set down. The pin pile was installed by utilizing Subsea Fast Frame (SFF), in order to achieve pin pile's verticality. The crucial part during pin pile installation was to ensure meeting the verticality accuracy and minimum tolerance may high potentially impact the substructure install ability and meeting level requirement. However, due to a big annulus gap at pin pile sleeve of the substructure had caused prolong in levelling operation. In order to improve subsequent platforms levelling operations, a set of centralizers were introduced and installed after confirming the pin pile verticality result, in order to reduce the annulus gap. Despite all the challenges aforementioned, the installation of CSPs were completed successfully and most importantly with Zero Lost Time Injury (LTI).

Novel Elastomer Materials for Extreme Temperature Operation in Subsea Thermal Insulation Applications at Unlimited Water Depth

2021 ◽  
Author(s):  
Adam Jackson ◽  
Rodrigo Diaz ◽  
Heidi Svalund ◽  
Raymond Hansen ◽  
Grethe Hartviksen
Keyword(s):  
High Temperature ◽  
Thermal Insulation ◽  
Water Depth ◽  
Extreme Temperature ◽  
Base Material ◽  
Development Project ◽  
Pressure Vessels ◽  
Hand Tools ◽  
Gentle Pressure ◽  
Cost Efficient

Abstract Rubber based systems have been used in subsea thermal insulation for many years and have proven themselves to be reliable and cost efficient. Formulations have been changed over the years, pressing the maximum usage temperature upwards and into the realm of 160 to180°C in a hot-wet environment. Until recently there was a need for high temperature along with pressure vessels (autoclaves) for vulcanisation. This has limited the widespread use of such systems. Recent changes have eliminated the need for autoclaves, however the high temperature vulcanisation hasstill been required. A novel formulation has been developed to address these shortcomings, so that this class of materials could have wider use. This new material employs freely available materials in a unique blend. The material contains no hydrolysable groups and can operate from −40°C to 180°C continuously in air and in a hot-wet environment and retains its resilience and flexibility; and thus opening for use in both high and low temperature systems. The formulation does not include the use of hollow glass microspheres and is, correspondingly, without water depth limitations. A new, highly reliable vulcanisation chemistry allows for a stable latency time for application, with vulcanisation temperatures reduced to 50°C. This allows for rapid hand application and simultaneous vulcanisation on subsea trees, valves, manifolds, etc. The material is self-agglomerating, merging under gentle pressure, and can be applied at high thickness. As the base material has an intrinsically low thermal conductivity, glass-based fillers are not needed. The material adheres well to painted or primed surfaces and to many other materials typically used in the offshore thermal insulation industry. The 2-component material is conveniently combined on site, reducing the need for refrigeration during transport and easing mobilisation logistics and is applied using simple hand tools. Extruded profiles can be used directly on complex structures or combined into sheets for ease of application on more regular shapes in order to optimise application rates. Moulds are not required for application, reducing engineering and fabrication cost, while also shortening mobilisation time. The system has been extensively qualified according to ISO 12736 for continuous use at 180°C. This paper will detail important aspects of the development project along with the results of the qualification testing.

Design, Construction, and Installation of Off-Shore Wind Turbine With Tripod Suction Bucket Foundation

2017 ◽  
Author(s):  
M. Ryu ◽  
J. Lee ◽  
D. Kwag ◽  
S. Bang
Keyword(s):  
Wind Turbine ◽  
Water Depth ◽  
Surface Soil ◽  
Development Project ◽  
Power Development ◽  
Bucket Foundation ◽  
Surface Foundation ◽  
The Government ◽  
Wind Power Development ◽  
Design Construction

As part of the national off-shore wind power development project by the government of Korea, the very first off-shore wind turbine utilizing tri-pod suction buckets for its sub-surface foundation has been successfully completed. This off-shore wind turbine with a capacity of 3MW has been designed, constructed, and installed in late 2016. It is located approximately 200 meters offshore with a water depth of approximately 10 meters. Sub-surface soil consists of interbedded clay and sand layers. Details of the design, construction, and installation of this wind turbine with tripod suction bucket foundation system are described and discussed.

HIL Development of Control Algorithm for Vehicle Demand-Driven Production of H2 From an Al/Mg and H2O Reaction

2012 ◽  
Author(s):  
John Parker ◽  
Christopher Poston ◽  
Richard Roser ◽  
Joel Anstrom ◽  
Timothy Cleary ◽  
...  
Keyword(s):  
Control Algorithm ◽  
Combustion Engine ◽  
Test Methods ◽  
Development Project ◽  
Hardware In The Loop ◽  
Technical Paper ◽  
Test Platform ◽  
Vehicle Demand ◽  
Real Hardware ◽  
Vehicle Test

This technical paper provides instruction by example on how to apply hardware-in-the-loop (HIL) simulation for accelerated development of a complex control algorithm. The instruction provided in this technical paper is directed to HIL test bench setup, software, simulated and real hardware, and test methods. As an example, the authors reference their collaborative development project of the last couple of years, now completed. The objective of that project was to develop a demand-driven hydrogen production system and integrate it with a hydrogen-fueled internal combustion engine-powered vehicle test platform. The instruction provided in this technical paper is supported by data from the referenced project example.

scholarly journals Modelling and forecasting the spread tendency of the COVID-19 in China

2020 ◽  
Author(s):  
Deshun Sun ◽  
Li Duan ◽  
Jianyi Xiong ◽  
Daping Wang
Keyword(s):  
Mathematical Model ◽  
Removal Rate ◽  
High Accuracy ◽  
Error Rates ◽  
Peak Time ◽  
Model Data ◽  
Key Factors ◽  
Effective Strategies ◽  
Forecasting Error ◽  
Modelling And Forecasting

Abstract To forecast the spread tendency of the COVID-19 in China and provide effective strategies to prevent the disease, an improved SEIR model was established. Parameters of our model were estimated based on collected data that issued by the National Health Commission of China (NHCC) from January 10 to March 3. The model was used to forecast the spread tendency of the disease. The key factors influencing the epidemic were explored through modulation of parameters, including the removal rate, the average number of the infected contacting the susceptible per day and the average number of the exposed contacting the susceptible per day. The correlation of the infected is 99.9% between established model data in this study and issued data by NHCC from January 10 to February 15. The correlation of the removed is 99.8%. The average forecasting error rates of the infected and the removed are 0.78% and 0.75%, respectively, from February 16 to March 3. The peak time of the epidemic forecast by our established model coincided with the issued data by NHCC. Therefore, our study established a mathematical model with high accuracy. The aforementioned parameters significantly affected the trend of epidemic, suggesting that the exposed and the infected population should be strictly isolated. If the removal rate increases to 0.12, the epidemic will come to an end on May 25. In conclusion, the proposed mathematical model accurately forecast the spread tendency of COVID-19 in China and the model can be applied for other countries with appropriate modifications.

scholarly journals A Narrative Review of the Assessment of Extension and Advisory Services on an Agricultural Development Project in North-West Province, South Africa

2018 ◽  
Vol 25 (2) ◽  
pp. 87-101
Author(s):  
Ijatuyi Enioluwa Jonathan ◽  
Mokone Bontle
Keyword(s):  
South Africa ◽  
Agricultural Development ◽  
Agricultural Extension ◽  
Development Project ◽  
Provincial Government ◽  
Political Condition ◽  
North West ◽  
Advisory Services ◽  
North West Province ◽  
Extension Work

The effectiveness of agricultural extension work relies upon the accessibility of staffs that are qualified, roused, conferred and receptive to the consistently evolving social, financial and political condition. This narrative seeks to highlight the role that extension and advisory services play on a specific Agricultural Development Programme Project in North-West Province of South Africa. It also explores how best the provincial government can ensure that policies are developed and timely interventions are delivered with the needs of the farmers being considered first. Recommendations for rapid growth in the cattle and livestock industry in the province were also suggested.

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