A 'step changer' for
the offshore industry

Walk to work, 100 miles at sea

The walk to work vessel is a new type of offshore maintenance support vessel, designed to provide the offshore industry with multifunctional support. A combination of many functions results in a vessel the world has never seen before. Discover how efficiency, safety and the environment inspired her design. As an oil and gas exploration and production company stated: “This vessel could be a step changer for the entire offshore industry”.

“This vessel could be a step changer for the entire offshore industry”

As one of the oldest and most all-round logistic companies Royal Wagenborg has always been a pioneer. Nowadays the company is still at the forefront of developments.

Extensive experience in the oil and gas industry

Our offshore services once started with supplying offshore platforms in the Capsian Sea. Nowadays, we offer a diverse portfolio of services tailored to the oil and gas industry. Wagenborg is a specialist in rig moves, conductor driving and oilfield services. Additionally, we have a lot of maritime and offshore experience in oil and gas related transport disciplines. Many major oil companies find their logistic solution at Wagenborg.

Innovative 'Walk to work' vessel

Recently Wagenborg again took a new step in its development when Nederlandse Aardolie Maatschappij (NAM) and Shell UK, awarded Royal Wagenborg a contract for a new type of vessel that will support offshore operations for an initial period of 10 years. Many of NAM/Shell UK’s oil and gas platforms in the North Sea do not have a permanent crew or helicopter pad, which means frequent journeys to and from the platform by ship in order to perform maintenance work. Dubbed the ‘Walk to Work’ vessel, the new unit is a genuinely unique design that will play a crucial role maintaining and servicing NAM/Shell UK’s production platforms in the North Sea.

Look back to the official contract signing

Efficient, safe and cost-effective

Theo Klimp, Fleet Director of Royal Wagenborg, explains that the vessel will enable NAM/Shell UK to execute work programmes on production  platforms “more efficiently, safely and cost-effectively”. The new design, which will provide accommodation for up to 60 people, including 40 maintenance and service personnel, who will work in two shifts, has also been designed to transport all of the chemicals needed for intervention and restart work on a platform. It will be equipped with a motion-compensated offshore access system – the Ampelmann – from the Dutch company of the same name. NAM/Shell UK anticipates that the vessel, which will provide a workspace, floating hotel and a means of transport to and from offshore platforms, will deliver substantial cost savings.

‘Start-up’ and intervention equipment

At the heart of the new design is a package of ‘start-up’ and intervention equipment installed in the vessel that will enable wells to be restarted quickly and efficiently and less expensively than is currently possible. “The vessel will be certified to carry all of the usual chemicals an offshore vessel might  transport, but it will also be able to transport very specialised chemicals used in interventions on a well,” Mr Klimp explained. “It will also have a  edicated area for all the pumps and frequency converters for the pumps required to supply chemicals to a platform, and it will be certified for working with the very high pressures that a cold start on a live well entails.”

General specifications
General specifications
Length over all 79,30 meters
Width 15,85 meters
Depth 7,00 meters
Draught 5,40 meters
Deadweight 2.800 tonnes
Speed 13,5 knots
Accommodation 60 persons
Dynamic positioning DP 2

Wagenborg turned to PG Marine for the cold start/inspection, maintenance and repair (IMR) package, which will draw heavily on PG Marine’s experience with similar below-deck solutions for IMR vessels. The below-deck package will include pumping, injection and control systems, in addition to a nitrogen generator, umbilicals and hose-reels.

Motion compensated elements

The Ampelmann will enable maintenance personnel living on the vessel to access the platforms, but perhaps the most interesting feature of the design is the use of a motion-compensated crane, which will be used totransfer equipment from the deck of the vessel onto a platform. The crane will operate in conjunction with a motion-compensated system supplied by anotherDutch company, Barge Master. The motion-compensated unit, named the T40 Barge Master, is small and compact. The T40 is capable of compensating an offshore knockleboom or telescopic boom crane with a capacity of 15 tonnes. Not surprisingly, the concept of a motion-compensated crane is attracting a lot of attention from vessel designers and owners alike.

As Mr Klimp highlighted, active heave compensation is used on many cranes on offshore vessels, but the ability to compensate for pitching and rolling motions in addition to heave will be unique, at least in the offshore oil and gas sector. “Ensuring that the hook is stable in all directions really is new,” said Mr Klimp. He explained that the unit on Wagenborg’s new vessel will be able to lift up to 5 tonnes at an outreach of 20 m. It will be able to lift loads to a height of 30 m. The T40 Barge Master unit will be capable of transferring equipment to and from a platform and the deck of the vessel in wave heights up to 3 m.


The dynamically positioned, DP2 vessel, will be 79 m overall with a breadth of 16 m, draught of 5.4 m, service speed of 12.5 knots and 10,000 hp. The vessel is expected to be delivered in early 2015.

Innovative by combining many features

The walk to work vessel is a unique maintenance support vessel. Due to the combination of many features this vessel is a product the world has never seen before. Please read more about the detailed specifications.

Motion compensated crane

Safe lifting operations are guaranteed with a three-dimensional neutral and heave compensated hook with a minimal footprint on deck. Roll, pitch and heave motions are compensated with vertically mounted cylinders, which are placed between the vessel and the crane. The lifting capacity is 20 ton @10 m / 2 ton @32,5m (DAF1.25). Next ›

Motion compensated gangway

A fully integrated access system will be used to transfer people from the vessel to offshore structures and to transfer small cargoes or equipment. The system compensates the motion of the waves up to 2.5 m. Next ›

Voith Schneider Propulsion

Two Voith Schneider Propellers enable stepless control of thrust in terms of magnitude and direction for the vessel. The VPS makes extremely fast and precise thrust changes possible and enables efficient dynamic positioning under extremely harsh weather conditions and roll stabilisation of the vessel. The bow thruster are specially designed for very low noise levels. Next ›

Chemical supply and cold...

The vessel will be certified and equipped with a below-deck tank installation for transporting and bunkering 6 different chemicals. The vessel is equipped with a Cold Start-Up installation for well stimulation. Next ›

Deck space of 500m2

The vessel is designed with a huge deck space of 500 m2 for maintenance equipment. Next ›

The daughter craft

The daughter craft of the W2W vessel is designed for standby duties. The rescue boat is fully compliant with SOLAS UK and Dutch continental shelf regulations. Next ›

Green DP® system

The Walk to Work vessel is equipped with the Kongberg GreenDP® system which was designed to reduce fuel consumption. This sophisticated system employs a control strategy that uses the smallest possible thrust vector, and thus power, to keep the vessel inside user-defined boundaries of the working and operational area. Studies have shown that a minor sacrifice in station keeping accuracy pays off by a fuel reduction of about 20%. Next ›

Accommodation facilities

The Walk to Work vessel offers accommodation facilities for 60 people, including 20 crew. Next ›