Inline gas liquid separation system with a shared reject vessel

A method of operating a gas-liquid separation system, the gas-liquid separation system comprising a splitter which is configured to separate a well stream into liquid and gaseous phases;

• the splitter having an outlet for the liquid phase which is connected through a liquid continuous line to an inline degasser that is configured to drive separation of gas and liquid by centripetal acceleration, wherein clean liquid exits the degasser through a liquid outlet pipeline and gas with some liquid is extracted from the degasser into a first reject line and flows into a reject vessel;
• and the splitter having an outlet for the gaseous phase which is connected through a gas continuous line to an inline deliquidizer that is configured to drive separation of liquid and gas by centripetal acceleration, wherein clean gas exits the deliquidizer through a gas outlet pipeline and liquid with some gas is extracted from the deliquidizer into a second reject line and flows into the reject vessel;
• the method comprising:
• transferring an inlet well stream to the splitter;
• separating the well stream into a liquid phase and a gaseous phase in the splitter;
• transferring a liquid continuous stream from the splitter into the degasser, wherein the liquid continuous stream is set into spin and centripetal acceleration drives separation of gas and liquid, and wherein clean liquid exits the degasser through the liquid outlet pipeline and gas and some liquid are extracted from the degasser into the first reject line and flow into the reject vessel;
• transferring a gas continuous stream from the splitter into the deliquidizer, wherein the gas continuous stream is set into spin and centripetal acceleration drives separation of liquid and gas, and wherein clean gas exits the deliquidizer through the gas outlet pipeline and liquid and some gas are extracted from the deliquidizer into the second reject line and flow into the reject vessel;
• wherein mixed liquid and gas from the first and second reject lines are separated by gravity in the shared reject vessel;
• and
• wherein degassed liquid from the reject vessel is combined with clean liquid from the degasser in the liquid outlet pipeline and dry gas from the reject vessel is combined with clean gas from the deliquidizer in the gas outlet pipeline.