Subsea compressor cleaning method wherein the cleaning liquid is retrieved from the multiphase process fluid

A method of operating and cleaning a compressor, the method comprising:

• a. passing a first fluid through the compressor, said first fluid comprising gas, and said compressor operating to compress the first fluid passed therethrough;
• b. modifying the first fluid to produce a second fluid comprising gas and liquid, said gas and liquid being from at least one well, wherein said modification comprises cooling said gas of the first fluid upstream of the compressor to condensate liquid, the liquid contained in the second fluid including said condensate liquid, or wherein said modification comprises changing the level of compression of the fluid by the compressor;
• and
• c. passing the second fluid through the compressor, wherein said second fluid is passed through the compressor for a limited time period to clean a surface inside the compressor, said compressor operating to compress the second fluid passed therethrough.