SUBSEA UMBILICALS & SEALS
FEATURE SPONSOR
Controlled flow excavation systems
SeaVex is a hybrid subsea excavation system which is extremely adaptable, compact and controllable. The equipment houses a large single cast counter- rotating impellor complete with direct drive and torque restrictor driven by a powerful compact 320kw hydraulic motor.
As well as the SeaVex units being utilised for cable and pipeline trenching, the units can also become a dual system to be operated for trunk line excavation, sand wave clearance and seabed preparation.
USAGE
The unit is typically used in the vertical plain, or when mounted within an articulation cage, may be tilted 45° from the vertical to increase the operational scope – this development allows pre-trenching operations within a closer range for umbilical entry in to J-tubes, for deburial of the umbilical at the J-tube entrance or for deburial operations of jack-up rigs which have become stuck.
SeaVex tackled seabed sediments of 25kPa-40kPa without the assistance of jetting lances on this project. The successful lowering of this cable will allow a second submarine cable to be laid safely perpendicular over the buried cable later in the season.
IN-HOUSE EXPERTISE
Their in-house expertise includes highly skilled and experienced offshore technical professionals and onshore engineering management and operational support teams. They develop subsea cable handling and burial solutions, including vehicle and handling systems, with a proven track record in taking projects from concept design, delivery, testing and on- going support.
PHAROS OFFSHORE
7 members of Pharos Project Crew recently teamed up on-board the DPV Supporter to utilise the tooling to successfully lower one energised subsea cable down in to a 3.75 metre deep protective trench from a 1 metre stand-off distance in the German North Sea.
The unit will be employed throughout 2016 for several key scopes to come in the offshore wind and oil and gas markets and remains a valuable asset within the offshore industry, delivery bespoke controlled flow excavation solutions, globally.
CASE STUDY – SUCCESSFUL RECOVERY OF FAULTY CABLE Pharos Offshore’s Hydraulic Cable Grab and offshore personnel have successfully supported and completed the recovery a faulty cable section on the Walney offshore windfarm aboard the Edda Fonn vessel.
INNOVATIVE ENGINEERING SOLUTIONS The company delivers innovative engineering solutions by combining state of the art technology with knowledge gained from real operational experience. Pharos offshore personnel are experienced in all major manufacturers of remote operated vehicles, plough systems and launch and recovery systems and their multi-disciplined team have an extensive track record in subsea trenching, survey and ROV support.
Pharos Offshore
The subsea hydraulic cable grab had been built to client specification for this project and was delivered within a 6 day turnaround to Liverpool Port ready for operations.
SUBSEA ENGINEERING SOLUTIONS The company delivers engineering solutions for subsea cable installation, maintenance and repair and work with clients across the offshore oil & gas, submarine telecoms and renewable power industries.
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www.windenergynetwork.co.uk
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