In the early 1930s, the demand for oil was rising, but oil prices were low. Costs for new exploration and production were very high, and oil companies needed a way to find more oil with a minimal expenditure of money. Across America were numerous cased wells which produced poorly or not at all. Various methods had been tried to get at the oil-bearing formations in these wells — with little success. A new and effective method of casing perforation was needed, one that could accurately reach the profitable strata without...

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