Ann: Icon Flares Gas at Lydia , page-7

Choke Sizes
The diameter of the orifice plate (measurement device) through which production (gas, liquid or mixture) is passed. The differential across the orifice plate provides a measure of the fluid rate (gas, liquid or mixture). Choke sizes are usually given in imperial terms as a fraction of an inch (eg: 1/2 inch, 3/4 inch)
250,000cbft/d would be a very encouraging result, Eastern Star Gas (ESG) reported back in June 09 of an Inaugural gas flow rate from it's Bibblewindi pilot of 250,000cbft/d which resulted in a re-rating of ESG share price, ICN have a way to go but are definitely on track