EPR
- HARMONY & HERITAGE
Pacific OCS, USA - 1992
Platform
The Harmony and Heritage platforms are located offshore
California in over 1,000 feet water depth.
Challenge
Following damage sustained by the platforms during
installation EPR were tasked with the assessment,
strengthening and repair of the facilities.
MSL
Scope
MSL provided engineering support to EPR in a number of
areas:
Strengthening
of damaged members:
MSL studied the diverless implementation of strengthening
braces at 8 horizontal frame elevations down to 960 feet
water depth. The study included the preparation of remote
installation procedures.
Assessment
of conductor bay joints:
MSL undertook a study to develop strengthening schemes to
improve fatigue lives for seven different joint
configurations. They included combinations of grout
filling, clamping, and weld improvement techniques.
Methodologies were developed strength and fatigue life
predictions for grouted joints.
Harmony platform - Pacific OCS, USA
Clamp
Detail Design:
MSL carried out the detail design of three stressed
grouted repair clamps for installation to the Heritage
platform. The scope included preparation of AFC drawings
and of fabrication and installation procedures.
Benefits
Engineering assessment was exploited to identify the
requirement to strengthen and repair. Cost-effective
repair solutions were developed where intervention was
unavoidable.
