Abstract: In order to address the high temperature fault of the air compressor on the offshore oil platform during start-up in extremely cold weather,the operating data and alarm parameters of the air compressor were analyzed on site,and it was found that the main cause of the fault was the high temperature of the screw head caused by low oil temperature and poor fluidity. Based on this conclusion,innovative modifications were made to the air compressor sled. Through analysis and comparison of three modification schemes,combined with the actual spatial layout of offshore platforms,it is confirmed that the installation of louver air valves in air-cooled air compressors is the most reliable and operable modification scheme. This modification provides experience for solving similar problems of in-service air compressors in Bohai Oilfield.

Key words: twin screw air compressor, low temperature start-up fault, louver air valve