Patent attributes
Provided is a hydrocarbon well tubing casing annulus (TCA) control valve system that includes a TCA flowline to direct TCA fluid expelled from a TCA of a hydrocarbon well system to a collection facility, a TCA control valve to regulate the flow of the TCA fluid in the TCA flowline, a TCA sample port to enable sampling of the TCA fluid expelled, a TCA check valve to facilitate forward flow of the TCA fluid, a TCA pressure sensor to sense pressure of the TCA, and a TCA control system to: receive (from the TCA pressure sensor) a sensed pressure of the TCA, determine (based on the sensed pressure of the TCA) that a pressure of the TCA is below a threshold TCA pressure, and, in response, control the TCA control valve to operate in a closed position.