By Mohamed A. El-Reedy
With many of the effortless fuel and oil reserves came upon and costs rebounding, businesses are actually drilling a ways offshore in severe climate situation environments. As deepwater wells are drilled to bigger depths, engineers and architects are faced with new difficulties comparable to water intensity, climatic conditions, ocean currents, apparatus reliability, and good accessibility. Offshore constitution layout, building and upkeep covers all kinds of offshore constructions and systems hired worldwide.
The final reference for choosing, working and retaining offshore constructions, this ebook presents a highway map for designing buildings for you to rise up even within the most harsh environments. the choice of the correct kind of offshore constitution is mentioned from a technical and financial perspective. The layout method for the fastened offshore constitution could be provided and the way to study the layout to arrive the optimal answer. Nonlinear research (Push over) research can be offered as a brand new strategy to layout and determine the prevailing constitution. Pile layout and tubular joint with the impact of fatigue loading should be awarded additionally from a theoretical and a realistic element of view.
With this e-book in hand, engineers obtain the main up to date equipment for appearing a structural lifestyles cycle research enforce upkeep plans for topsides and jackets, utilizing non harmful trying out. lower than water inspection is mentioned for enormous quantities of systems intimately. complex fix method for scour, marine progress and broken or deteriorating individuals are mentioned. danger dependent below water inspection strategies are coated from a pragmatic pint of view.
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Additional info for Offshore Structures Design, Construction and Maintenance
1. 2 gives the overall weight of the topside for an eight-legged platform in 91 m of water. In calculating the overall weight of a platform, a contingency allowance of 5% should be used to cover variations in the loads. 1 Weights and Weight Percentages for an Eight-legged Drilling/ Production Platform Weight (Tons) 1. 8 3. 1 4. 9 5. 9 Subtotal 2. 3 ID Component Description 1. Legs 2. 3. 7 Other framing Miscellaneous framing 4. 5 100% Virtually all the decisions about the design of a platform depend on the number of jacket legs.
Typically, waves in the ocean often appear as a confused and constantly changing sea of crests and troughs on the water’s surface because of the irregularity of wave shape and the variability in the direction of propagation. 5 | Offshore Loads wave propagation can be assessed as an average of the direction of individual waves. Wave direction is considered to affect the platform omnidirectionally, as per API RP2A. In general, actual water-wave phenomena are complex and difficult to describe mathematically because of nonlinearities, three-dimensional characteristics and apparent random behavior.
2 GRAVITY LOADS Gravity loads consist of the dead load and the live (imposed) load. 1 Dead Load The dead load is the platform’s own overall weight and, in addition, the weight of the equipment, such as piping, pumps, compressors, separators, and other mechanical equipment, used during operation of the platform. The overall weight of platform structure upper decks (topside) includes the piling, superstructure, jacket, stiffeners, piping and conductors, corrosion anodes, decking, railing, grout, and other appurtenances.