Our wireline tensioners (WLT) maintain a constant vertical tension on the drilling riser. In floating vessels they compensate for the effects of heaving and rolling due to waves, currents, tidal water and wind and they allow for safe and efficient drilling.

Our broad range of wireline tensioner (WLT) systems and sizes supports your riser according to your individual project requirements.

Compared to direct acting tensioners (DAT), WLT systems normally provide more tensioner units resulting in increased redundancy. Additionally, they are more flexible in the location of the tensioner units. Critical components are installed away from the moonpool and splash zone, thereby increasing the component’s lifetime.

Our experts provide comprehensive support, right from the pre-engineering and tender phase. Simulating your specific rig layout and precise calculations is a vital part of this, resulting in the tensioning system that best meets your operational needs.

In the WLT system’s design we have a strong focus on performance, safety and reliability. In daily operation, performance measured as load variation is minimized

by optimizing the hydraulic flow path. With an in-depth knowledge and extensive tests we ensure the best com-bination of wires and sheaves and minimize mechanical friction in the system.

Compared to industry standards, we extend the lifespan of the WLT system significantly with larger bearings, high performance wire ropes, sheaves and cylinders.

Our WLTs are equipped with a field proven anti recoil system to ensure fast and safe emergency disconnec-tion. The closure algorithm is based on simulations on disconnects in a wide range of operating conditions.

With a split main shaft on dual units, our maintenance friendly WLT system ensures fast and simple replace-ment of shaft and bearings.

Available Option■ Multi capacity WLT to expand the operational range

Wireline Tensioners

For floating drilling vessels

Benefits

■ Expedient and valuable support all the way through the project and in operation

■ Minimum load variation ■ Up to 100 % longer lifetime of the WLT system

with larger bearings, high performance wire ropes, sheaves and cylinders

■ Maintenance friendly with split main shaft■ Multi capacity WLT (optional)

For more information, contact marketing@mhwirth.com | mhwirth.com

Wireline Tensioners | For floating drilling vessels

1500 kips 2000 kips 3000 kips 3200 kips 3500 kips 4000 kips 5000 kips

Wire travel 50 ft (15 240 mm)Other lengths upon request

Working pressure 3 263 psi(225 bar)

3 000 psi (207 bar)

Design pressure 2 625 psi(250 bar)

3 335 psi (230 bar)

Number of tensioners

12 8 12 16 14 16

Capacity each unit 125 kips (561 kN)

250 kips (1 113 kN) 200 kips(900 kN)

250 kips (1 113 kN) 315 kips(1400 kN)

Mid-stroke capacity 100 kips (444 kN)

229 kips (1 020 kN) 176 kips(785 kN)

229 kips (1 020 kN) TBA

Pressure vessels 24 x 2 210 l 16 x 2 210 l 24 x 2 210 l 32 x 2 210 l 28 x 2 210 l 32 x 2 210 l 32 or 48 x 2 210 l

Wire diameter 1 ¾ in (44 mm) 2 ¾ in (70 mm) 2 ½ in (64 mm) 2 ¾ in (70 mm) 3 in (76 mm)

Sheave diameter 52.0 in(1 321 mm)

89.5 in (2 273 mm) 88.0 in (2 235 mm)

89.5 in (2 273 mm) 92.0 in (2 337 mm)

Weight* 631 000 lb (286 mT)

674 000 lb(306 mT)

1 006 000 lb(457 mT)

1 269 000 lb(576 mT)

1 166 000 lb(529 mT)

1 322 000 lb(600 mT)

TBA

Design temperature -4/+113°F (-20/+45°C)

Third party classification

ABS/DNV GL

* Weight includes the tensioner unit with accumulators, fixed and movable sheave houses, idler sheaves, control skid, working and standby pressure vessels, compressors and control system.

Data is subject to confirmation by the manufacturer.

Technical SpecificationsThe table below is a selection of typical variants. Other combinations are available upon request. All WLT units can be delivered as single or dual units.

© MHWirth 2017 | 2017/04 Rev. 1