Bill Daugherty runs one of the larger companies, NGAS Resources Inc., which was recently ranked the third fastest growing small business in the United States by Fortune magazine.
"We're risk takers as individuals -- how else would you describe people who like to look down 6,000 feet (1,800 meters) into the ground and see what's there?" Daugherty said.
"What you don't see are the wildcat guys with boots and hats and a cigar. We use technology like computer graphics and we monitor gas flows from our wells by satellite and we maximize production by projecting trends in individual wells. It's a very scientific business but it's also a lot of fun."
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