Abstract: During the development process of a certain oilfield in Bohai,the gas production has gradually increased,and the original design operation mode,“one in operation,one on standby”,of natural gas compressor unit,has become severely misaligned with the current gas export demand. The new operation mode where two natural gas compressors are online simultaneously has problems of low operating efficiency and high energy consumption. To break through the bottlenecks of traditional cylinder clearance control technology,the controllable suction valve unloader technology and one-command intelligent,safe,and uninterrupted flexible matrix switching technology are adopted. These technologies effectively solve the above-mentioned problems with the optimal economic cost and provide a reference for optimizing and upgrading operation and maintenance regimens of similar natural gas compressors.

Key words: reciprocating natural gas compressor for offshore oil fields, controllable suction valve unloader technology, energy conservation and efficiency improvement, intelligent control