Drilling and Production Practices in the United States

The first two of these factors result, to a large extent, from the fact that a greater proportion of new development has been deeper development, and these wells have been drilled in the face of progressively lower per well allowables. In California, for instance, maximum allowables have declined from 400 barrels per day in March, 1938, to 156 barrels per day in September, 1940, and during this same period some 125 wells were drilled to the deeper 10,000-foot producing horizons discovered during this time.
Keywords: Cost, Costs, derrick, drill pipe, reservoir, rotary table, San Francisco, California, Drilling, Equipment, Oil, Oils, Operation, Pressure, Production, Wells
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