Offshore hook-up project management
Master thesis
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http://hdl.handle.net/11250/220023Utgivelsesdato
2014-05-28Metadata
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Sammendrag
There is a lot going on offshore at the Norwegian Sector these days. Especially on the Ekofisk
field, this is one of the oldest and most important fields in the North Sea.
Ekofisk 2/4 Lima (EKOL) is the newest addition to the field and houses the biggest offshore
accommodation facility in the world. Ref. Chapter 2.1.
The purpose of the thesis is addressing different issues, and various parts of an offshore
hook-up project. The aim is to perform experimental tests using 3.25 tons pad eyes with
regard to actual lifting operations. But also highlight other important aspects in projects like
this, such as the use of relevant standards, assess risk, the importance of safety and overall
project management.
Rosenberg is in the process of updating their procedures for pad eyes to current applicable
standards. Here both NORSOK and DNV standards have been used as a basis.
This thesis is divided into two main parts. Part one examines the various factors that are
important to consider in a hook-up project, and provides important theoretical basis. Part
two takes up execution, analysis and results of the experimental testing.
To conduct the testing, I had to design and produce a variety of test pieces.
I then looked at the significance of welding methods, and how the steel pad eyes behaved
when they were subjected to strain both vertically and angularly. More information
regarding the experimental testing is provided in chapter 4.
According to the experimental testing the welding methods and welding types, had little or
no effect on the strength while testing. Thus, the original test procedures were replaced with
new ones, that explores how the pad eyes reacted to strain at different hole sizes. This is to
check what would happen if the pad eyes were not designed according to the requirements
of the approved standards.
This proved to be useful learning for both the thesis and the company's part.
The test pieces which were prepared according to the standard, tolerated the stresses that
were applied, and got minimal deformations. While pad eyes that deviated from the
standard got much larger deformation and some failed completely.
This only emphasizes the importance to follow the standards' requirements as this may have
fatal consequences if neglected.
Beskrivelse
Master's thesis in Offshore structural engineering