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Experimental Determination of Friction Factors and Minimum Volumetric...
Experimental Determination of Solids Friction Factors and Minimum Volumetric Requirements in Air or Gas Drilling, Topical Report; August 1981 -
Determination of Optimum Air (Gas) Injection Rate in Aerated Drilling...
Determination of Optimum Air (Gas) Injection Rate in Aerated Drilling Operations, Annual Report; May 1, 1979-April 30, 1980