MHWirth’s cost-efficient drilling packages for semi-submersibles can fit to any type of hull. With our RamRig™ design, they perform in a large number of operations worldwide.

Our award-winning cylinder-based rigs, also known as the RamRig™ solution, have shown their excellence for three decades. The highly flexible RamRig™ hoisting system has proven to be robust in worldwide operations in harsh and cold climates, as well as in tropical areas.

Our latest RamRig™ hoisting system is a smart solution towards a greener drilling concept:■ 60% less installed power, reducing CAPEX consider-

ably with regards to power and the RamRig™ system itself

■ Reduced power consumption through accumulators■ Regeneration of power via the hydraulic power unit

(HPU)■ Optional hydraulic power generator to feed into a

hybrid drive line

Additional RamRig™ benefits■ Efficient operations through high speed by gearing and

power boost from accumulators■ Highly accurate active/passive compensation, inte-

grated in the hoisting cylinders ■ Power independent passive compensation for maxi-

mum operational safety■ No deadline compensator■ Low maintenance cost (no cut and slip, no brakes)■ Low noise emission■ Very safe operation. Load hoisting and lowering is

controlled solely by the closed loop hydraulics, without any mechanical brakes and clutches

MHWirth’s rig packages can fit all market leading hull designs and have a strong focus on efficient operations, material handling and simultaneous operations to reduce flat spots and redundant designs. Our packages are designed for digital operations with open networks for easy integra-tion of third party systems and future developments. Various derrick sizes, configurations and capacities are available, de-pending on the hull design and your functional requirements.

Semi-submersibles

RamRig™ solution for shallow to deep water

Benefits

■ Flexible solutions to suit project requirements and hull designs: set-back at drillfloor or on top of the double bottom

■ Increased efficiency through process and layout optimization and automation solutions

■ Improved environmental footprint through lower energy consumption and higher efficiency

■ Broad experience for concept in harsh and arctic environments

■ Seamless integration of equipment, engineering and lifecycle service

■ Integrated drilling control and monitoring system, including DrillView™ system, enabling condition based maintenance to reduce OPEX

■ Simulators in the design phase to optimize opera-tions and for training purposes

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

Semi-submersibles | RamRig™ solution for shallow to deep water

Set-back at Drillfloor Set-back at Lower Deck

Main capacities Drilling depth +/- 30 000 ft (9 144 m)Operational water depth from 250 ft (75 m) up to 5 000 ft (1 524 m)

Net hoisting capacity 1 000 short tons (907 mT) in elevator/optional 750 short tons (680 mT) or 1250 short tons (1 134 mT) in elevator

Hoisting system ■ 3 x cylinders with stroke: 26.5 m (86.9 ft)/lifting height: 53.0 m (173.9 ft) ■ Gear 1: 1 000 short tons @ 0.7 ft/s (907 mT @ 0.2 m/s) - boost 577 short tons @ 2.1 ft/s (523 mT @ 0.65 m/s) up;

2.3 ft/s (0.7 m/s) down (boost with 75 ft riser operation) ■ Gear 2: 603 short tons @ 1.0 ft/s (547 mT @ 0.31 m/s) - boost 340 short tons @ 2.6 ft/s (308 mT @ 0.80 m/s) up;

3.9 ft/s (1.2 m/s) down (boost with 135 ft tripping operation) ■ Gear 3: 246 short tons @ 2.0 ft/s (223 mT @ 0.62 m/s) - boost 114 short tons @ 8.2 ft/s (103 mT @ 2.5 m/s) ■ HPU – 5 x 450 kW main motors/pumps + 3 x 100 kW feeding pumps and 2 x 100 kW pilot pumps

Compensation ■ Passive compensation by means of mineral oil accumulators and N2 pressure vessels, fail-safe even at full black-out ■ Active compensation by HPU and active drive of accumulators ■ Gear 1: 25.7 ft (+/- 12.9 ft) @ 5.15 ft/s (7.84 m (+/- 3.92 m) @ 1.57 m/s) ■ Gear 2: 38.6 ft (+/- 19.3 ft) @ 5.15 ft/s (11.77 m (+/- 5.88 m) @ 1.57 m/s) ■ Gear 3: 77.2 ft (+/- 38.6 ft) @ 5.15 ft/s (23.54 m (+/- 11.77 m) @ 1.57 m/s)

Derrick size 49.2 x 52.5 x 210.0 ft (15.0 x 16.0 x 64.0 m) 50.9 x 56.9 x 219.8 ft (15.5 x 17.4 x 67.0 m)

Set-backQuadruple stands, nominally 135 ft

Min. 31 000 ft DP/29 stands 6 ¾ to 9 ½ in DC/4 stand BHA11 340 ft up to 14 in casingMax. 1 100 short tons (1 000 mT)

Min. 31 000 ft DP/29 stands 6 ¾ to 9 ½ in DC/4 stand BHA6 630 ft up to 14 in casingMax. 1 990 short tons (900 mT)

BOP/kill and choke system

Flexible integration of BOP as per customers choice. Up to 6 ram, footprint 20 x 16 ft (6.1 x 5.2 m), weight max. 450 short tons (400 mT)/15 000 psi (1 035 bar). MUX or hydraulic control systems.

BOP and Xmas tree handling

Hang-off trolley for BOP with full capacity BOP crane above. Hard hang-off facility for BOP/riser as option. SWL as required. Optional space for two each BOPs. Xmas tree trolley with crane. Stack-up guiding and fork-lift trolley as option.

Skids and elevator for handling of trees from upper to lower deck

Risers 50, 60 or 75 ft (15.2, 22.9 or 27.4 m) joints stored horizontally in hull or on deck. Riser handled with dedicated gantry crane(s) or by rig crane with riser yoke. Complete delivery including all pups, flex joints and valves and two each TJs with +/- 65 ft (19.8 m)

stroke. Riser handling systems to suit horizontal or vertical storage and hull specific requirements

Mud pumps Four each triplex TPK 2200 AC gear driven, single water jacket motor drive. Standard 7 500 psi (517 bar)/optional 10 000 psi (690 bar)

Low pressure mud and solid system

Integrated low pressure mud system including mixing facilities. Bulk handling and hose loading packages available.Solids control and handling packages are tailor made to suit the requirements.

Data is subject to confirmation by the manufacturer.

Technical Specifications

© MHWirth 2017 | 2017/09 Rev. 1