Complex sentence: He holds 21 patents on Hydraulic fracturin operations and analysis, testing and conformance applications,, and is an author or co-author of over 170 technical papers and articles in areas of fracturing, reservoir engineering, well test analysis, conformance, and numerical simulation.
Split into simpler sentences: He holds 21 patents on Hydraulic fracturing operations and analysis, testing and conformance applications. He is an author or co-author of over 170 technical papers and articles in areas of fracturing, reservoir engineering, well test analysis, conformance, and numerical simulation.