TPi January 2016

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January 2016 Tube Products International 37
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Tube_WW_87x260_Text EN.indd 1 23.12.14 14:01
Span assessment
expertise delivers
savings to oil and
gas industry
Jee Ltd, a multi-disciplined subsea engineering and training
firm, completed more than a thousand specialist span
assessments in 2015, delivering major cost-savings by
avoiding remediation work.
Graham Wilson, head of late life at Jee Ltd, commented,
“Pipeline spans are formed due to an uneven seabed, scour
or sandwaves, and can cause
integrity issues with potential
catastrophic and costly results.
These spans can be susceptible
to failure through fatigue and, as
span length increases, the risk
of fatigue damage due to direct
wave loading or vortex-induced
vibrations (VIV) also increases.”
Jee’s engineering team has a
proven track-record for providing
pipeline span assessment to the
global oil and gas industry, with
systems in place to run span analysis quickly and accurately.
Mr Wilson continued, “We have an in-depth understanding
of the codes and standards and appreciate their limitations,
allowing us to effectively challenge them without adversely
affecting safety. By doing so we can remove conservatism and
increase the allowable span length, minimising the remediation
work required which can lead to expensive operations and
potentially create new issues. When intervention work is
necessary, we are pragmatic in our approach and ensure
offshore vessel time and activities are optimised to maintain
economical operations.”
In addition, Jee has developed an innovative span monitoring
kit that monitors the motion of spans and the associated
environmental conditions. The data collected can be used to
prove that VIV is not occurring when predicted by the design
codes, removing the need for costly corrective work.
Alternatively, the kit allows the occurrence of VIV to be
detected, providing supporting evidence of the need for
intervention. The kit can also be used to provide assurance
that remediation measures are having the desired effect.
Jee’s capabilities and integrated services span the whole
life-of-field, including design, integrity management, pigging,
late life and training for the global oil, gas and renewables
industries.
Jee Ltd – UK
Graham Wilson, head of late
life at Jee Ltd