Control System for Reduced Emissions

Abstract

A fluid control system is provided for controlling flow of a process fluid through a pipeline. In one example, the pipeline can include a valve that defines an upstream and a downstream portion of the pipeline. The system can include one or more instruments configured to control operation of the valve. In one example, the system can include a compressor and an expander configured to selectively receive supply gas from the upstream portion of the pipeline via a supply line. In one example, supply gas flows to the compressor and the expander via the supply line when a differential pressure between the upstream and downstream portions of the pipeline is below a predetermined threshold and does not flow to the compressor and expander when the differential pressure between the upstream and downstream portions of the pipeline is above a predetermined threshold.

Dependencies are inferred from the claim text.