Subsea Trenching Contractor
Cable, Pipeline, Flexible
& Umbilical Trenching
Our Underwater Trenching Solutions
Our Trenching and Related Services
has extensive capability to successfully enable it to readily and
competently perform all aspects of trenching work,
including, but not limited to:
designs, builds and operates their own trenching equipment. They have combined
their significant offshore and subsea
with detailed R&D,
including model and full size equipment testing, in order to provide
state of the art trenching equipment and operational methodologies
suitable for the many varied trenching project requirements encountered.
- Project Management.
- Risk Analysis.
In particular, Subtrench has sound and proven expertise and operational experience in the following areas:
- Pipeline and stiff flexible
and umbilical trenching;
- Cable, flexibles and umbilical
- Remedial trenching of pipelines,
cables, flexibles and umbilicals;
- Achieving trenching parameters including trench
depth, trenching stresses, out of vertical straightness tolerances,
transitions, span corrections, high point corrections, etc;
- Performing all necessary trenching project management
and engineering ranging from risk analysis through to
pipeline trenching stress analysis;
- Developing procedures and methodologies for engineering, fabrication, operations and mobilisation/ demobilisation to suit the individual and differing needs of each project;
- Engineering, setup and mobilising vessels for trenching
- Operations from barges and pontoon barges with trenching from above the water line through inter tidal through very shallow to deep waters;
- Operations from DP vessels from shallow to deep waters;
- Providing diverless operations;
Pipelines, Stiff Flexibles & Umbilicals (Back to TOP of PAGE)
Modern day trenching projects place a much higher demand on the capability, performance, safety, environmental impact
and reliability of subsea trenching equipment and associated operating methodologies than in the past.
Pipelines, stiff flexibles and umbilicals are being required to be trenched to greater depths for longer
distances and in more remote and environmentally hostile and sensitive areas. The need to operate in
the range from very shallow waters inaccessible to most vessels through to deeper waters is also necessary.
The trenching equipment is required to handle a wider range of soil types, often unknown, at greater reliability and
faster trenching speeds. Upheaval buckling is also more prominent.
Drawing on their extensive past
Subtrench has built and operated the proprietary
Subtrench One ,
a modern day trenching machine to achieve these objectives.
(Click on the Subtrench One
link for a Data Sheet and Images).
Subtrench One Pipeline Trenching Machine Data Sheet Pdf (150k)
Similarly to the requirements for the pipeline and stiff flexible and umbilical
trenching machine -
- modern day cable, umbilical & flexible projects also place a much higher demand on the capability,
performance, safety, environmental impact and reliability of
subsea trenching equipment and associated
operating methodologies than in the past.
Cables, flexibles and umbilicals are less robust than
pipelines and hence the trenching machine needs to provide additional measures to minimise the risk of damage
during trenching operations. With the advent of offshore wind farms, power cable sizes are increasing
and require a handling system suitable for the larger minimum bend radius whilst still maintaining
relatively low external loads on the cables. The cable, flexible or umbilical is being required to
be trenched to depth on a single pass. The trenching depth is increasing for longer distances and in
the case of wind farms; the shore crossing is often in densely populated and environmentally sensitive areas.
The need to operate in the range from above the water line and very shallow waters inaccessible to most
vessels through to deeper waters is also required. The trenching equipment is required to handle a wider range of
soil types, often unknown, at greater reliability and faster trenching speeds. There is also the need to
be able to perform remedial trenching of cables that have become exposed over time.
To accommodate the changing requirements for cable, flexible and umbilical trenching, Subtrench has built
and operated the proprietary
a modern day cable trenching machine to achieve these objectives.
(Click on the Subtrench Two
link for a Data Sheet and Images).
Subtrench Two Trenching Machine Data Sheet Pdf (150k)
For further information, please
feel free to call us +61 (0) 400 922 188, send us an email to firstname.lastname@example.org
or use our Contact Us form to send
an online inquiry. We will endeavor to respond to your email or
Inquiry Form submission within 24 business hours.
Submarine, subsea, underwater, pipeline, cable, flexibles, umbilicals, bundle,
pre, post, burial,
trenching, trenching machine, excavation,
shore crossing, beach crossing, river crossing,
machines, contractor, subtrench, trenching equipment, trenching