FRACTURING SERVICE, AND PARTICULARLY FOR A SERVICE OF EVALUATING FRACTURES IN OIL AND GAS WELL FORMATIONS BY USING RADIOACTIVE PROPPING AGENTS

PROPPING AGENTS-NAMELY, SAND, ALUMINUM PELLETS, WALNUT SHELLS, AND GLASS BEADS COATED WITH A RADIOACTIVE MATERIAL NAMELY, ZIRCONIUM-NIOBIUM, COBALT, IRIDIUM, AND IRON, USED PRINCIPALLY IN THE OIL AND GAS WELL SERVICING INDUSTRY IN FRACTURING SUBSURFACE EARTH FORMATIONS TRAVERSED BY A WELL BORE