CorMan flies compact but powerful Enerpac heavy equipment lift system to the aid of remote PNG drill rig sites

Remote PNG – one of the most challenging
delivery addresses for drilling contractors

Civil construction and maintenance contractors sometimes have to organise prompt delivery of vitally needed equipment to difficult worksites. But it takes an exceptional one to do the job when the airfreight address is above the cloud line in remote PNG and the item to be dispatched is a heavy equipment lift system capable of hoisting bulldozers.

But it’s all in a day’s work for CorMan Contractors PNG Ltd, which prepares pads for oil and gas drill rigs wherever they are needed throughout the nation’s mountainous and remote countryside, which ranges from the slopes of Mt Hagen (3,778m) down through rushing river valleys to 5,000km of coastline including some of the world’s biggest swamp plains.

It’s beautiful, unforgiving country in which CorMan operates; an area that has attracted adventurous men such as billionaire heir Michael Rockefeller (who disappeared there last century) and Errol Flynn, who was drawn to this frontier at the age of 18, seeking his fortune in tobacco planting and metals mining.

But it is country that is hard on machinery and makes big demands on companies such as CorMan, which often have to rely on helicopters to keep sites and heavy equipment operating in areas where roads are rudimentary and even basic airstrips may not exist.

"CorMan and their equipment – which includes disassembled dozers and everything they require for self-sufficiency – are helicoptered into remote untouched sites to prepare the facilities for drill rig and crew. That includes drill pad, camp, workshop and mess," says Antony Smith, Bishops technical specialist who works in partnership with the global high-pressure (700 bar) hydraulic equipment supplier Enerpac. Bishops provides expert advice on Enerpac equipment required to service any application, full service support and traceable calibration, all in country.

To ensure CorMan can keep all their equipment operating, they transport in all their own tooling, which includes the lift system for dozer maintenance, comprised of four interconnected Enerpac RC-308 30-ton cylinders actuated by a P-462 two-speed hand pump.

The 27kg two-speed pump – the biggest in the Enerpac hand pump range – is ideal for sites where electric power and other energy supply is not always available, reliable or is costly. The pump, with large 7.2 litre oil capacity, uses its faster first stage speed to set up jobs, then its powerful second speed to actuate the compact workhorse RC series pumps, a type that has been proven in rugged resource site uses extending from the deserts of Australasia to the south and the huge infrastructure projects of South-East Asia to the north.

Enerpac P462, left, and the compact ultra-reliable RC range of cylinders, in capacities from 5-95 tons

The pump and interconnected cylinders combination features an AM-41 manifold and four V66 manually operated check valves for even lifting and load holding safety. These ideally complement the power of the RC series cylinders, which offer a stroke of 209mm from the compact (387mm collapsed height) dimensions, using rugged high-pressure engineering to extract optimum power from an easily portable (18.1kg) cylinder.

CorMan Contractors also holds a range of other Enerpac cylinders and hand pumps to cover every eventuality they may meet on the work site, says Pat Molloy.

"CorMan’s lifting rig is an outstandingly efficient, portable and reliable solution to a demanding requirement. CorMans Managing Director Graeme Paine and Maintenance Superintended Asael Cajandig selected Enerpac for its reliability and in-country support offered by Bishops."

CorMan contractors

CorMan Contractors (PNG) Limited is an Incorporated Joint Venture between Mananda Umbrella Joint Venture Limited and Coral Seas Mining Services (PNG) Limited. The head office is located in Port Moresby, Papua New Guinea, with field offices located at Moro, Southern Highlands Province and Lae, Morobe Province.

The company’s core business is as a Civil Construction Contractor with services including:

   1. Civil Engineering Design and Feasibility Studies,
   2. Geotechnical Engineering Design and Feasibility Studies,
   3. Road construction and maintenance,
   4. Bridge construction and maintenance,
   5. Earthworks for bulk and detailed excavations,
   6. Drilling and blasting works, including controlled blasting,
   7. Quarry operations,
   8. Camp construction and operation,
   9. Equipment maintenance and hire services.


For more information on Bishops, please contact
For more information about Enerpac equipment please use the contact details below:
New Zealand:
Papua New Guinea:
ph: +61 (02) 9743 8988
ph: +64 (02) 166 7716
ph: +675 7988 9115