Design of offshore structures and types of offshore oil. Depending upon the depth of the sea water and as per the requirement, various types of platforms are designed. This paper provides a broad overview of some of the key factors in the analysis and design of offshore structures to be considered by an engineer uninitiated in the field of offshore engineering. Major types of scaffolding in construction october 17, 2017 in resources by brian webb scaffolding is an integral part of almost all construction projects and has been used ever since the first structures were built. This is a selfelevating rig, and is used for smaller, shallower offshore deposits. Offshore platforms can broadly categorized in two types fixed structures that. Different types of offshore structures and the history of their development have already been discussed in detail in chapter 1. Major types of scaffolding in construction avontus us. The ultimate reference for selecting, operating and maintaining offshore structures, this book provides a road map for designing structures which will stand up even in the harshest environments. Alternative designs of facilities for the offshore oil and gas industry. Fixed structure types and floating structure types. So, you can see easily distinguish three categories.
A second major type is the gravity concrete structure see figure 2, which is employed in the north sea in the norwegian and british sectors. Types of offshore concrete structures details and uses. There are various types of offshore structures, fixed bed structures and compliant structures. Offshore structures an overview sciencedirect topics. Semisubmersibles and drill ships are designed to remain afloat hundreds of miles in deep waters. The drill passes through a system of safety valves called a blowout preventer bop stack. An oil platform, also referred to as an offshore platform or oil rig is a large structure facilities to drill well and also to extract oil and natural gas hydro carbons.
Overview of exploration and production activities dti sea page 4 august 2001 the first offshore licensing round took place in 1964 and the first significant discovery of gas was made in the southern north sea in 1965 and oil was discovered four years later in the central north sea. The study described the design of offshore wind turbines in a more generic way with. Offshore structures offshore drilling equipment which. An introduction on offshore engineering and technology. In the marine industry, this protection method is also used on steel piles, piers, jetties and ship hulls. The paper describes an overview of registered accidents to offshore structures based on the databases woad and codam. These are fixed structures built with concrete or steel legs anchored on the sea bed. In this article we will discuss about the meaning and types of off shore financial centres. Offshore platform design welcome aboard exciting world of offshore. Corrosion effects on structural behaviour of jacket type. There are different types of outsourcing services provided by the companies. Guidance notes on spectralbased fatigue analysis for. If so, share your ppt presentation slides online with.
They provide finance, insurance, broking, holdingcompany and headoffice services, and exist because the economic benefits outweigh their. Marine structures and materials yucheng li and linpu li dalian university of technology, china keywords. Haritos the university of melbourne, australia abstract. Drill pipe sections are added at the surface as the well deepens.
Offshore structure design, construction and maintenance covers all types of offshore structures and platforms employed worldwide. Onshore, shoreparallel structures built to reduce waveinduced toe erosion, with a secondary function of limiting flooding of the land behind the structure by reducing wave overtopping. Seaward licensing rounds have been held roughly every two years. Types of off shore oil platforms floating production system. Different types of offshore oil and gas production structures. Nonlinear, time domain simulation of ocean structures and wind turbines subjected to extreme environmental actions. Offshore structures are designed to either stay semi permanently or permanently fixed to seabed by applying proper means such as piles, anchors, or gravity or stay floated and fastened. It is the installation of structures and facilities in a marine environment, usually for the production and transmission. Floating these offshore platforms are floating in free surface and are movable from one location to another. These structures can have a vertical, stepped, or curved face, and typically have a horizontal surface or cap at the crest. The study gave an overview of the wind potential offshore as shown in fig. Offshore financial centres play a critical role in the international financial system.
Corrosion effects on structural behaviour of jacket type offshore structures the application of weight losses to investigate corrosion effects on structural behaviour of an offshore structure under wave loads is presented in this study. Chapter 17 design of support structures for offshore wind. For drilling wells beyond 10,000 feet, naval architects have designed a type. I have made money from other survey sites but made double or triple with for the same time and effort. Life extension solutions for offshore structures and pipelines. Offshore engineering and technology day1am 3 history and current state of the art of offshore structures definition of offshore structures no fixed access to dry land may be required to stay in position in all weather conditions functions of offshore structures exploratory drilling structures. To learn more, read galvanization and its efficacy in corrosion prevention. The overwhelming majority of platforms are piledjacket with deck structures, all built in steel see. Weight losses of sections obtained during previous experimental studies are implemented in the model. The soils supporting an offshore installation are subjected to forces arising from the structure weight, the environmental and imposed loads acting on the structure, and direct wave loads. The force transfer in either case is discussed in more detail later.
Ppt offshore structures update powerpoint presentation. White paper, december 2008 offshore hedge funds vs. Types of offshore concrete structures their details and uses generally, offshore concrete structures are constructed exposed to an open sea environment. Offshore structures offshore drilling equipment the drill string is lowered through a conduit riser. Design of support structures for offshore wind turbines 561 in 1995 the joule i study of of fshore wind energy in the ec was published 3. Bolted connections i version ii 33 4 type force transfer between the plates due to the clamping force generated by the pre tensioning of the bolts. On the risk of structural failure on norwegian offshore. Offshore structures update is the property of its rightful owner.
Offshore concept development identification and assessment of development options for offshore facilities, whether they are based on fixed or floating structures concepts, is crucial in the selection of the most cost effective solution to take forward to the following project phases and to support customers investment decisions. Introduction to offshore structurespart2 subsea technology. Types of steel structures tension members, compression. Read this article to know more about business process outsourcing. Another common type of cathodic protection, known as galvanizing, is commonly used to protect steel members and structures. The main reasons why offshore structures require repairs using grouted clamps are damage caused by ship impact, or by objects dropped overboard typically. An overview of design, analysis, construction and installation of offshore petroleum platforms suitable for cyprus oilgas fields kabir sadeghi1 girne american university, department of industrial engineering, mersin 10, turkey abstract offshore structures are used worldwide for a variety of functions and in a variety of. Site was mostly swamp, filled with much, organic material with 95% water content. So, the three classes bottom fixed structures floating and then resting on sea bed three classes. Subsea drilling, well operations and completions page 8 of 45 types of offshore structures and drilling units a. However, if the offshore fund is structured as a corporation, then only the corporate entity will have to submit the paperwork, thus allowing its individual nonu. Introduction to offshore structurespart2 free download as powerpoint presentation.
There are two main categories of offshore structures, fixed and floating. Environmental loads play a major role in offshore structures design process. Under the compliant structure category, there are several types of structures namely tension leg platforms tlp, guyed tower, articulated tower, spar platforms and floating production storage and offloading fpso. Common types of drilling rigs as drilling extended further offshore into deeper water, offshore drilling rigs have become larger. Typical offshore structure will have a deck structure containing a main deck. The designer has to start from the basics including offshore as a definition, the. Among all the nanomaterials, a material by name carbon nanotubes has led the way in terms of its captivating structure and also its ability to furnish specific applications. Examples include semisubmersibles, spar platforms, floatingleg platforms, drillships, fpsos floating production, storage and offloading systems. In complex structures, such as offshore platforms, a fatigue failure of a single structural element may not result in a catastrophic failure of the entire structure, but it definitely changes the expected lifetime of the structure.
Ppt report on offshore platform designs slideshare. These template type structures will be fixed to seabed by means of tubular piles either driven through legs of the jacket main piles or through skirt sleeves. The structure is designed to withstand wind speeds of 200 mph structure. Introduction to the analysis and design of offshore. Tlp structures are also a part of the floating production systems. Introduction to the analysis and design of offshore structures an overview n. The overwhelming majority of platforms are piledjacket with deck structures, all built in steel see slides 1 and 2. Over the past many decades there has been a sudden growth in the field of research and advancement related to the nanomaterials. In this chapter, the logistics of a field development and the innovation of a structure that suits this development are addressed.1481 769 36 552 668 925 476 1631 8 1386 681 123 1176 381 1017 1305 1133 1351 1399 553 1587 337 1566 494 502 261 1202 1348 831 478 1179 1366 131 219 1126 963 1260 321