Offshore
structures
Our award winning
structures solving
your offshore
challenges
contents
Subsea Drilling Templates 3
Subsea Protective Structures
Sea Swift
OUR
(Conductor Supported Platforms) 4
Minimum Facilities Platform
AWARD WINNING Wellhead Tower 6
Modular Platform 7
STRUCTURES Tension Decks 8
Bespoke offshore structures
MOPU Wellbay Module 9
SOLVING Conductor Slot Addition 10
YOUR OFFSHORE
CHALLENGES
Aquaterra Energy’s work in developing innovative Our in-house team of highly qualified and skilled
solutions and delivering bespoke offshore offshore structure engineers is responsible for
structures has earned the company a place in the technological advancements in platforms, subsea
protective structures, drilling templates, tension decks,
top rankings of the world’s offshore oil and gas
skidding systems, and more. Our exemplary reputation
engineering providers. is supported by a robust track record of service delivery
We have a unique perspective as recognised experts in for customers worldwide.
analysis, design, procurement and installation of complex
offshore structures, using innovative approaches. This means
that we are able to consider installation from the very start
of structural analysis and devise greatly improved overall
solutions. For customers this often results in the reduction
or removal of installation vessel requirements, simplified
operations, improved safety and lower overall project costs.
“
Our approach removed
the need for any
vessel, including dive
support, and made the
operation completely
platform based. The
positive impact in
terms of safety, simops
and cost was huge”
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riser systems offshore structures hydraulic systems service & rental
Subsea Drilling Templates
We supply expertly engineered template installation packages to suit a range
of applications, from casing to seabed supported, run on drill string or on
conductor, for a variety of well spacing configurations and conductor sizes.
With an emphasis on providing a complete Using field proven running tools and
solution, our experienced installation centre slot locking mechanisms, our
engineers undertake responsibility for the subsea drilling templates are designed
entire project, including initial concepts, to withstand environmental, installation
project management, design, production, and jacket docking loads across a range
QA testing and offshore installation. of seabed conditions and operational
requirements. All templates are optimally
Providing a complete service that includes
designed for rig installation by the
design, fabrication and installation ensures
use of field proven equipment and
we can deliver accurate spacing of wells prior
methodologies.
to platform installation and assist in jacket
docking. This allows for the provision of
docking piles, if required.
Subsea Protective Structures
We provide a complete solution to dropped object loadings, in line with enclosed with sloped sides to help deflect
all subsea protection requirements, standards specified by Norsok U-001 and fishing activity and other debris.
ensuring design and optimisation meet ISO 13628-1.
Deflector structures can easily be installed
each specific project’s needs. We also provide alternative smaller from a drilling rig with Aquaterra Energy
deflector structures. Greatly reduced in providing the necessary procedures,
We supply a range of subsea protective
size and lighter in nature, these structures personnel and equipment, including
structures for subsea equipment,
provide a temporarily suspended subsea running tools, drill string orientation tools
including subsea trees and wellheads.
wellhead protection from dropped objects and subsea cameras to enable fast and
These protective structures can be fully
while, at the same time, being fully efficient installation.
overtrawlable and withstand trawl and
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“
Minimising costs on shallow
water developments; tipping
the balance and making
marginal field developments
viable; reducing field
development costs and
minimising time to first oil”
Sea Swift
(Conductor Supported Platforms)
Aquaterra Energy’s conductor supported Sea Swift offers all the benefits of a platform, coupled to the
rig based installation of a subsea development. Doing this,
platform (Sea Swift) allows marginal fields the widely used, field proven technology helps our customers
to be developed quickly, using just the to achieve reduced platform costs, lower installation costs,
jack-up and supply vessel needed to drill simplified critical path and reduced intervention costs within
shallow water developments.
the wells to install a complete platform.
Sea Swift offers operators different development options,
increasing overall development flexibility. It opens up
opportunities for accelerated first oil and removes the
scheduling barriers inherent in developments requiring multiple
installation vessel types. It has become a key ingredient in
minimising field development costs.
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Minimum Facilities Platform
As an alternative to shallow water subsea developments, removes constraints from the procurement process – it can
Sea Swift offers a compelling option to minimise maintenance be fabricated in a much larger range of yards, has a lower
and capital costs by utilising dry trees and eliminating costly fabricated weight than a traditional platform and does not
intervention vessels from simple, routine operations. rely on large forgings or complex machining, as would be
required with a subsea solution. This all helps to reduce
It also allows installation to be carried out by a standard overall associated project costs, increase the speed at which
jack-up rig, without additional installation vessels and without it is delivered and offers significant fast-tracking production
large investment in traditional platform structures. Sea Swift opportunities.
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Wellhead Tower
The Sea Swift wellhead tower provides an easy solution for It also offers the ultimate application for pre-drilling template
adding new slots to existing platforms or enabling wells to be operations, enabling wells to be drilled, completed, with
drilled and completed before the arrival of a larger platform dry trees installed, before the arrival of the main processing
for new developments. It is a low cost option that is delivered platform. This allows pipelines to be laid and tied-in before
significantly faster than traditional platforms and can rapidly platform delivery and its simple hook-up method enables
increase production from platforms constrained by existing slots. oil and gas production to begin as soon as the platform
is delivered, eliminating the need for rig and construction
vessel’s intervention.
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riser systems offshore structures hydraulic systems service & rental
Modular Platform
In its largest configuration, Sea Swift can take the form of a
significant platform. The modular design concept allows a
central wellbay module, typically containing up to 12 slots,
to be combined with separate process modules. This results
in a larger platform than can easily be handled by the rig
as a single piece. This innovative modular design allows a
significant platform to be installed while maintaining all the
benefits of the Sea Swift concept.
The modular platform system has also been considered for
landlocked developments, where access to and from the port of
disembarkation is narrow. Modular sections 12ft wide are easily
transported on the back of a standard low loader and delivered to
the port. The single sections are then shipped to the development
site and constructed into a standard topside facility.
BENEFITS
Reduced platform capital cost
Simplified critical path – all operations
can be carried out by the rig vessel,
removing the need for heavy lift vessels
Fast delivery of the wellbay module
allows drilling and dry tree installation
to start while design and manufacture
continues in the process modules – so
earlier first oil or gas is achievable
Combines the benefits of subsea and
platform developments in a simple,
low cost solution
Summary of features
ITEM SEA SWIFT CONVENTIONAL SUBSEA
PLATFORM
Capital Cost Low High Medium / High
Lead Time Short Long Long
Installation Costs Low High Medium
Intervention Costs Low Low High
Abandonment Costs Low High Medium
Time to First Oil Short Long Medium
Interface Issues Simple – Rig only Complex – Heavy lift Complex for life of
vessel and rig / well field intervention
interface issues
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Tension Decks
Using our experience in the specification and design
of riser systems, combined with its extensive structural
engineering expertise, we are in the unique position of
being able to design bespoke tension decks to meet
client’s requirements. This means we offer an improved
level of operational flexibility, accommodating the needs
of modern jack-up drilling.
Whether installing decks on new-build rigs or designing a new
deck for an existing rig, we are able to offer a design that is
simple and efficient, both economically and operationally.
The size and capacity of the deck will depend entirely on the
capacity of the rig and the client’s requirements. We have
produced concepts and final fabrications for decks ranging
from 300TE – 1,500TE tension capacity.
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riser systems offshore structures hydraulic systems service & rental
Bespoke
Offshore
Structures
We have the skills to design,
fabricate and install bespoke
offshore structures.
Aquaterra Energy has the ability to deploy
teams of experienced, highly creative
engineers, focused on solving complex
offshore problems. Our experience in
working on a challenge with no immediate
off the shelf answers available and
developing a complete, technically robust
solution has been used for wide ranging
applications by clients worldwide.
Projects undertaken have ranged from low
cost commodity product design through
to major multimillion dollar innovative
solutions.
We have a track record of achieving
outstanding technical success and we
deliver structured, staged development
processes adopted to minimise upfront
costs and client commercial risk.
MOPU Wellbay Module
Combining our experience in developing conductor supported platforms (CSP)
and large tension decks for drilling rigs with our knowledge of riser analysis,
we are among the leaders in spearheading development of the mobile offshore
production unit (MOPU) wellbay module concept, as a solution to low cost field
development.
The use of MOPUs as an economic means of are able to push the boundaries of what is
developing a field is widely known, but often traditionally considered limiting conditions
the costs involved in installing a platform for production risers, unsupported by a
to ‘feed’ the production capabilities of the jacket. This, combined with our detailed
vessel can mean the economics of marginal understanding of the capabilities of jack-up
developments become unworkable. rigs and the operational requirements of
drilling, position us to offer the overall
However, installing a wellbay module on the expertise to specify, design and install
hull of the MOPU, removes the requirement wellbay modules, with the potential for
for a permanent minimum facilities platform successful production on previously
and allows production from multiple wells. unviable fields.
Using our detailed knowledge of how risers
behave in varying marine conditions, we
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“
Conductor slot additions
provide access to
previously unreachable
targets and extend the
life of existing assets”
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riser systems offshore structures hydraulic systems service & rental
Conductor Slot Addition
We provide a complete slot addition service. The team assesses
platforms for suitability, plans and engineers the solution and
completes operations offshore, leading to installation of a new
conductor ready for well construction.
Conductor slot additions provide bigger conductor to be installed
the ability to increase production enabling longer reach wells to
from assets by adding new internal be drilled, providing access to
guides on to the platform. They previously unreachable targets.
offer advantages over slot recovery
This service can be highly
or subsea tiebacks; they are not
advantageous on ageing platforms,
reliant on old, potentially damaged
where new wells are required but
conductors; not restricted in range
no slots exist to facilitate drilling.
or direction by the existing well
bore; do not require expensive
subsea trees, pipelines, umbilicals
and flowlines; and can allow a
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ABERDEEN HOUSTON
4 Albyn Terrace, 11490 Westheimer, Suite 850,
Aberdeen, AB10 1YP, UK Houston, Texas, 77077, USA
T: +44 (0) 1224 651250 T: +1 713 425 6391
E: aberdeen@aquaterraenergy.com E: houston@aquaterraenergy.com
CAIRO KUALA LUMPUR
Reyad Towers, 19 Corniche El Nile, Level 15, Menara Darussalam,
Maadi, 11431, Cairo, Egypt No.12 Jalan Pinang, 50450,
T: +202 2528 3356 Kuala Lumpur, Malaysia
E: cairo@aquaterraenergy.com T: +603 2178 6328
E: kl@aquaterraenergy.com
CAMBRIDGE NORWICH
St John's Innovation Centre, Innovation House, Alkmaar Way,
Cowley Road, Cambridge, CB4 0WS, UK Norwich, NR6 6BF, UK
T: +44 (0) 1223 422475 T: +44 (0) 1603 788233
E: cambridge@aquaterraenergy.com E: norwich@aquaterraenergy.com
24HR TEL: +44 (0) 1603 788233
www.aquaterraenergy.com
