Compressed Air and Power Solutions (CAPS) Australia has secured a supply contract from Woodside Petroleum to provide an air compressor package for the new $5bn North Rankin B Platform.

The project aims to extract remaining low pressure gas from the ageing North Rankin and Perseus gas fields.

North Rankin and Perseus gas and condensate fields are located about 137km off the north-west coast of Western Australia, in a water depth of about 125m.

The package, which has been designed and built by CAPS Australia with most of the parts sourced locally, contains three 160kw Ingersoll Rand rotary screw air compressors, along with two air dryers and four filters that are built to meet Woodside’s need for a 30 year lifecycle.

CAPS Australia senior project engineer, Alan Kemp, said: "As part of Woodside’s continuous improvement and ‘lessons learnt’ policy, CAPS incorporated the feedback from Woodside and developed a package that contains significant design improvements."

"The project aims to extract remaining low pressure gas from the ageing North Rankin and Perseus gas fields."

"To ensure maximum uptime and reliability, the package will have a centralised state-of-the-art programmable logic controller (PLC) which will oversee the three compressors and two dryers, linked to a range of data monitoring and analysis instruments," Kemp added.

Air compressors are built to survive extreme climatic conditions on and around the North West Shelf.

CAPS Australia said the unit’s oil and air coolers are built with anodised surfaces and the internal oil handling system will be made of duplex and super duplex stainless steels, while the entire external enclosure will be made with passivated 316 stainless steel.

In addition, the coolant, lubricant and drying media selected for usage in the machinery are non-hazardous and eco-friendly to match the location.The PLC will also include emergency power supplies to ensure minimal disruption even in the worst cases.

CAPS Australia designed, fabricated and supplied a special lifting beam to simplify installation of the package on the platform.

Image: The air compressor package is designed and built by CAPS Australia.