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  ["title"]=>
  string(46) "Offshore Access Solutions - Permanent Walkways"
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  ["introtext"]=>
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SubC continuous the effort to expand our series of our Offshore Access Products. Recently the first unit of the Permanent walkway design was delivered for a client in the North sea. As a result this system has been designed for extreme wind conditions, a north sea speciality.  

The unit is built from modules that can be configured as needed, allowing you to choose the length that suits your need. By designing using modules it is possible to reduce overall cost by standardization and also make sure that we deliver exactly what you need. The system is configurable from 4 m to 30 meters, with very flexible increments.

The walkway supports all major standards and will help increase the level of productivity when on-site and thereby contribute to an overall lower cost of energy. Our walkways are specifically designed using all the latest feedback that we have gained through the years of working closely together with our customers, who are the market leaders in Offshore Installation management.

The walkway unit is designed according to the highest standards for both safety and quality. Adding to this SubC has designed a number of optional configurations that adds functionality and convenience to improve overall productivity.

 

Fabrication and transportation have been an integral part of the design phase allowing for SubC to be able to deliver these systems at a very short notice in most of the world. Interface design is modular allowing for these units to replace existing walkways without the need for on-site preparation work.

 

By using in-house facilities for production, testing, commissioning and installation, we can ensure that the unit is fully compliant with all regulations for offshore and marine applications.

 

Optional configurations: 

  • End point camera
  • LED Traffic lights
  • Power transfer - up to 690V/250A
  • Hydraulic transfer
  • Pneumatic transfer
  • TP adjustable flood/working light
  • Walkway illumination
  • PA system connection (1 or 2 way)
  • Deluge system

 

Contact

Rune Værndal, Head of Projects, RV@subcpartner.com , +45 24981443

 

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Offshore Access Solutions - Permanent Walkways

SubC continuous the effort to expand our series of our Offshore Access Products. Recently the first unit of the Permanent walkway design was delivered for a client in the North ...

More
object(stdClass)#783 (58) {
  ["id"]=>
  string(3) "107"
  ["title"]=>
  string(63) "Collaboration Leads to First DBM´s for Installation by ROV´s "
  ["alias"]=>
  string(58) "collaboration-leads-to-first-dbms-for-installation-by-rovs"
  ["introtext"]=>
  string(4612) "

To meet customer demands, Trelleborg’s offshore operation collaborated with SubC Partner to design, manufacture and test a Distributed Buoyancy Module (DBM) for installation by a Remotely Operated Vehicle (ROV) on to an FPSO’s 12 inch production riser in a steep wave configuration. By having an ROV installable DBM, Trelleborg and SubC Partner were able to successfully execute a world first offshore project, which succeeded in replacing buoyancy modules on a live riser, without shutting oil production.
In floating production scenarios, pipelines such as flexible risers, cables and umbilicals are often required to be held subsea in specific geometric configurations to prevent over utilization of the system. To achieve this, one favored method is to attach discreet buoyancy modules to the outside of the pipeline. This process is usually done topside prior to the installation of the riser itself. Until now it has not been possible to attach the buoyancy on a live riser; the riser would have to be disconnected to perform the operation, causing production to stop, requiring expensive setups and significant cost in downtime.
SubC Partner works with its customers to lower cost of energy by developing innovative engineering solutions and executing well planned and efficient offshore campaigns. In this instance, to enable fitment of buoyancy on a live riser, a bespoke suite of ROV tools was developed by SubC Partner, while Trelleborg engineered a new type of buoyancy module.

Andy Smith, Customer Group Manager at Trelleborg’s offshore operation in Skelmersdale, says: “A variety of installation features and precise datum points had to be built in to the buoyancy modules to provide a known and repeatable interface between ROV installation tooling and the DBM components. Dimensional tolerances on a buoyancy element shell are generally intrinsic to the roto-molding manufacturing process. Attaining the stringent tolerances required for this project was made a success through collaboration between design, suppliers and tooling engineering.”
Lars Wigant, Director & Partner at SubC Partner commented: “Installation of the new ROV installed DBMs was a complete success. We were able to safely remove and install multiple modules in a very limited timeframe. We look forward to the next opportunity where we can use this field proven design on another project.”
Subsea Distributed Buoyancy Modules are typically used between a subsea structure and a surface vessel or platform. The clamping solution allows the DBMs to be fitted at any point along the length of the pipeline and the buoyant load must not migrate or degrade over the design life of the product. The two main functions of the DBMs are to provide uplift and maintain location along the riser.

The internal clamp to riser interface was based on a hinged version of Trelleborg’s ‘type 2’ friction clamp with nylon segments and rubber pads for added compliance The clamp had no loose components and the tightening mechanism was redesigned to suit the ROV interface. During testing, clamp performance was excellent, achieving a slip load in excess of 33 kN at ‘end of life’ condition and in prototype testing the hinged crossbars within the design meant that the fastener tightening was tolerant of a variance in tightening sequence.
In addition, buoyancy element fasteners, the mechanism that holds the two buoyancy halves together, had to be captive. To accomplish this, Trelleborg opted to make use of a bolted flange tightening system instead of circumferential securing straps and tensioners. This presented a challenge by increasing the risk potential for buoyancy element misalignment when elements were paired. To overcome this bespoke ‘floating’ nuts and bolts were used. The ‘floating’ nuts self-aligned upon engagement, ensuring every buoyancy element was aligned correctly and secured.

For press information:

For additional information on Trelleborg solutions for all offshore and subsea markets, please call Ruth Clay, Mobile: +12817405755; ruth.clay@trelleborg.comwww.trelleborg.com

For additional information on SubC Partner solutions for all offshore and subsea markets, please call Lars Wigant, +45 2878 2377, law@subcpartner.comwww.subcpartner.com

 

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Collaboration Leads to First DBM´s for Installation by ROV´s

To meet customer demands, Trelleborg’s offshore operation collaborated with SubC Partner to design, manufacture and test a Distributed Buoyancy Module (DBM) for installation by a ...

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