EN-FAB Inc. | Enhanced Oil Recovery & Metering Solutions | USA EN-FAB Inc. delivers Enhanced Oil Recovery, Metering & Measurement, and Gas Gathering solutions in USA. 3916+ projects, 2141+ customers. Get a quote! EN-FAB can provide the experienced technical personnel necessary to oversee installation and start-up of your unit. Our field technicians can help calibrate and troubleshoot if necessary. Our measurement experts offer training for your personnel in our Houston facilities or in the field to ensure proper functioning of the system in the future.