Abstract: A skid (10) is disclosed which includes a mainframe (22) and detachable side wings (22,24) which can be removed from the mainframe for transportation and attached to the mainframe at the site of use to enhance stability. The engine (14), compressor (12) and other equipment are mounted between the main beams (26, 28) of the mainframe (20) and suitable plates (136) are interdisposed between the main beams to allow a walkway between the engine and the compressor. Grating (156) is provided on other portions of the skid to facilitate use by operational personnel. All pipe runs beneath the grating and provisions are made for fluids to drain from the engine and compressor to storage tanks within the skid.