Barry Freifeld

Inventions

Portable X-ray Core Imager (LBNL File IB-1842P) A transportable x-ray core imaging system with a novel shielding arrangement that provides for a cabinet-safe system. Using an optimized compensator system enhanced dynamic range while imaging cylindrical objects using the cone-beam geometry is obtained.

Drill Rod Seal for Real Time Permeability Measurements While Drilling (LBNL File IB-1600) A rotating diverter head has been modified to permit air-permeability measurements while drilling is in progress. Supporting electronics and monitoring equipment permits almost fully automated testing between drill rounds. In addition, the diverter mitigates dust allowing for dry drilling in the unsaturated zone.

Constant Head Borehole Permeameter (LBNL File IB-1384): This instrument is a modified Guelph style permeameter based on the well known Mariotte siphon principle. The new instrument incorporates a pneumatic seal and a recirculation line used for removing trapped air in the area being measured. The permeameter is usable in both hard rock applications as well as less competent formations.

Sampling Tensiometer (LBNL File IB-1220): This instrument incorporates three two-way valves and a pressure transducer, which are located near the tensiometer’s porous surface. The tensiometer has been designed for both the sampling of fluids as well as to allow the recalibration of the pressure transducer from the surface. The tensiometer can be operated at any depth, since unlike a traditional tensiometer, an air column does not exist within the instrument.