Modularized subsea compressor train and method of installation

A subsea system comprising:

• a first foundation structure configured to be installed on a seabed, the first foundation structure comprising a connection interface configured to connect to a second foundation structure which is configured to at least partly support an additional compressor train on the seabed, wherein the additional compressor train increases the subsea system capacity;
• a first compressor train supported by the first foundation structure, the first compressor train comprising a first compressor with an inlet which is connectable via a fluid line to a well flow line;
• a compressed fluid line connected to an outlet of the first compressor and to a common outlet for compressed fluid in the subsea system, wherein the compressed fluid line comprises a flow regulation device;
• at least one of a first connection line connected to the compressed fluid line at a position upstream of the flow regulation device and a third connection line connected to the fluid line at a position upstream of the first compressor, wherein each of the first and third connection lines is configured to connect to the additional compressor train supported at least partly on the second foundation structure, and wherein each of the first and third connection lines comprises a corresponding flow regulation device;
• and
• a second connection line connected to the compressed fluid line at a position downstream of the flow regulation device, wherein the second connection line is configured to connect to the additional compressor train supported at least partly on the second foundation structure, the additional compressor train thereby being connectable to the common outlet, and wherein the second connection line comprises a flow regulation device.

A subsea system comprising:

• a first foundation structure configured to be installed on a seabed, the first foundation structure comprising a connection interface configured to connect to a second foundation structure which is configured to at least partly support an additional compressor train on the seabed, wherein the additional compressor train increases the subsea system capacity;
• a first compressor train supported by the first foundation structure, the first compressor train comprising a first compressor with an inlet which is connectable via a fluid line to a well flow line;
• a compressed fluid line connected to an outlet of the first compressor and to a common outlet for compressed fluid in the subsea system, wherein the compressed fluid line comprises a flow regulation device;
• a first connection line connected to the compressed fluid line at a position upstream of the flow regulation device and a third connection line connected to the fluid line at a position upstream of the first compressor, wherein each of the first and third connection lines is configured to connect to the additional compressor train supported at least partly on the second foundation structure, and wherein each of the first and third connection lines comprises a corresponding flow regulation device;
• and
• a second connection line connected to the compressed fluid line at a position downstream of the flow regulation device, wherein the second connection line is configured to connect to the additional compressor train supported at least partly on the second foundation structure, the additional compressor train thereby being connectable to the common outlet, and wherein the second connection line comprises a flow regulation device.