Our multi gear drawworks with two or three shifting gears allow for both high hook speeds and maximum hoisting performance with the added value of an improved energy efficiency.

MHWirth’s field-proven drawworks are the hoisting system which raises and lowers the travelling block and the equipment underneath. For onshore applications, gear driven drawworks are state-of-the-art technology. Compared to single gear drawworks, our multi gear design require less input power to achieve the same hook load.

With three independent braking systems, our drawworks are leading in HSSE standards and availability. They are equipped with a regenerative dynamic braking system via the main drives, a failsafe disk brake system for emergency and parking operations and an eddy current brake (ECB). Our unique ECB with coil temperature monitoring is ATEX approved. The auto driller system (ADS), based on an extra AC drive arrangement, works independently from the main drive system. In case of main drive failure the drill string can be secured with the ADS.

Our wireline protection system (WPS) prevents the “bird’s-nest” effect during a sudden stop in hoisting operations.

In our drawworks, we also set standards for usability and efficiency. With ADS the drawworks can be operated precisely. It allows automatic operation control with parameters for rate of penetration (ROP), weight on bit (WOB), stand pipe pressure (SPP) and DDM torque. The intuitive and flexible-to-configure human machine interface (HMI) of our drawworks control system allows the driller to focus on the most critical information. This results in higher drilling efficiency and safer working conditions. Our multi gear drawworks are accredited in accordance with API Spec 7K.

Additional Options for Control System: ■ Reduced motor mode to operate the drawworks with

one motor out of service ■ ADS for main motors for additional redundancy if the

separate ADS motors fail ■ Remote online diagnostics system allows our 24/7

technical service to monitor the functionality ■ Design option for ATEX Zone 1 ■ Secondary crown safer through the use of proximity

switch for additional crown protection ■ Auto gear change to automate repetitive drilling

operations

Multi Gear Drawworks

For onshore and shallow water applications

Benefits

■ Highest hook speeds and maximum hoisting performance

■ Three independent braking systems safeguard the complete drawworks operation

■ Auto driller system (ADS) for highest availability and efficiency

■ Compatible with chain driven drawworks (with AC or DC motors), with the added value of our high equipment quality

■ Long and short base frame designs to meet different substructure designs

Multi Gear Drawworks | For onshore and shallow water applications

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

© MHWirth 2016 | 2016/04 Rev. 1

Technical SpecificationsOur multi gear drawworks for onshore and shallow water applications are available with hoisting capacities ranging from 500 to 750 sh.tons (454 to 680 m.tons). The typical variants shown in the table below can be selected depending on rig requirements.

GH 2000-EG-AC-2G onshore GH 2500-EG-DC-3G-SV onshore GH 3300-EG-AC-2G onshore

Rig performance rating, max. 2 000 hp (1 491 kW) 2 500 hp (1 864 kW) 3 000 hp (2 237 kW)

Rig capacity, max. 500 sh.tons (454 m.tons) 750 sh.tons (680 m.tons)

Standard main motors Two AC, force ventilated

Eddy current brake type WN64 WN72

Lifting capacity first layer, max. 545 sh.tons (1 090 lbs x 1 000) with 12 lines

590 sh.tons (1 180 lbs x 1 000) with 12 lines

778 sh.tons (1 556 lbs x 1 000) with 12 lines

Lifting capacity fourth layer 448 sh.tons (897 lbs x 1 000) with 12 lines

488 sh.tons (976 lbs x 1 000) with 12 lines

626 sh.tons (1 250 lbs x 1 000) with 12 lines

Block speed, max. 244 ft/min (1.24 m/sec) with 12 lines

303 ft/min (1.54 m/sec) with 12 lines

232 ft/min (1.18 m/sec) with 12 lines

Dry weight 112 000 lb (51 000 kg) 127 900 lb (58 000 kg) 125 700 lb (57 000 kg)

Dimensions Length WidthHeight

328 in (8 334 mm)122 in (3 119 mm)125 in (3 173 mm)

322 in (8 200 mm)136 in (3 450 mm)98 in (1 350 mm)

338 in (8 592 mm)123 in (3 120 mm)127 in (3 250 mm)

Data is subject to confirmation by the manufacturer.