Traditional drilling technology, which is the core technology in drilling for more than 40 years, and there are restrictions on drilling high. Cause not worth it. (Uneconomical) to drilling in petroleum, petroleum volume is too low. However, with a combination of traditional drilling technology with new drilling technology. Drilling results in easier. A value greater economic modernization of modern drilling technology. Small countries with petroleum resources. Not worth it to drill with conventional drilling technology. It is possible to use drilling technology in drilling new petroleum resources in their countries.
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