Gas inlet orifice monitoring.

摘要

The invention provides a method of monitoring the operation of a gas inlet orifice below the surface of a liquid under the action of positive gas pressure and with the formation of bubbles at the orifice, comprising the steps of collecting signals indicative of the pressure of the gas flowing through the orifice; removing from such signals the components thereof indicative of the mean pressure of said gas; and monitoring from the remaining components of such signals the pressure fluctuations thereby detected and caused by the formation of gas bubbles at the orifice.