Patent ID: 9435681
Filing Date: 2016-09-06
CPC Classification: G01F

Claim Text:
1. A method for in situ calibrating a flow metering system to monitor fluid flow in a pipe from a well, comprising the steps of: measuring a first characteristic of the fluid flow exiting the well using a differential pressure flow meter during a dry gas period, and producing an first output data representative of the first characteristic; measuring a second characteristic of the fluid flow exiting the well using a SONAR flow meter time during the dry gas period, and producing a second output data representative of the second characteristic; determining a dry gas offset between the differential pressure flow meter and the SONAR flow meter based on the first output data and the second output data; and calibrating the flow metering system using the dry gas offset, wherein the calibrating of the flow metering system includes calibrating at least the differential pressure flow meter to decrease any difference that may exist between the first output data and the second output data.