The Queensland Curtis LNG (QCLNG) Project will transport coal seam gas via a 435 km pipeline to Gladstone, where it will be turned into LNG. (For more information about projects in Gladstone go to page 30.
Four compression units will be located at each of the 18 field compressor station locations that will contribute to the Train 1 field production infrastructure for the project.
Each compression unit contains a Howden WCVTA 510 screw compressor that operates at 1,485 rpm. The compressors are driven by electric motors that are supplied by Siemens.
Separate TEG skids, will be used in the field to dehydrate the CSG. The units are controlled by Allen-Bradley ControlLogix programmable logic controllers that have been custom designed and programmed to meet the operating requirements and regulations in Australia.
Technology traverses international boarders
Ivan Heidecker, Enerflex President, Canada and Northern United States said “We’ve structured the project with the design and prototyping of the compression units in Calgary Canada; fabrication of the skid and components in Casper, US; and, final assembly of the units in Brisbane. This approach reduces transportation time and costs and maximises Australian content on the project.”
Enerflex International Sales Manager Kelly Mitchell said that Enerflex constructed the first package in Calgary after almost two years of designing, planning and reviewing the units with QGC.
“The prototype underwent a battery of test scenarios, including a full-load, closed loop, string test for a minimum of four hours. QGC wanted to ascertain that all the components would effectively work together before the other 71 units were fabricated,” she said.
Once the manufacturing processes were finalised, equipment templates were created in Calgary to ensure fabrication consistency in Casper. The units will be disassembled and shipped to Brisbane for re-assembly and deployment in the field.
Enerflex General Manager Kurt Schaerer said “With the final assembly occurring in Australia, QGC is able to inspect the packages ‘in country’ to ensure quality, and monitor the project’s schedule.”
All 71 packages are scheduled to be commissioned by early 2013 with onsite commissioning to be performed by Enerflex.
