ous. With the development of this new drilling method, the geologist will have 

 a more efficient drilling system for exploration. It is not unlikely that the present- 

 day concept of wildcatting will be simplified. Equipment and time costs will be 

 substantially reduced; penetration rates will be increased; and in most respects 

 the work will be easier for the drilling crew. 



BIBLIOGRAPHY 



Agussol, M., 1956, Some economic aspects in turbine drilling: Techniques et Applications 

 du Petrole, p. 3, 8. 



Gallon, M., 1956, M. Gallon's exposition of the installation and the first result of a rig 

 using a turbine drill: Techniques et Applications du Petrole, p. 6. 



Grownmeyer, I. W., 1956, Increased drilling rates with turbodrills: World Oil, v. 144, 

 p. 144-156, Dec. 



LeVelle, J. A., 1956, Turbine drilling: Petroleum Engineer, v. 28, no. 11, p. 39-44. 



O'Connor, J. B., and Meyer, M. D., 1956, Turbodrills for American drilling: Monitor, 

 v. 1, p. 2-4, 46. 



Thacher, J. H., and Postlewaite, W. R., 1956, Turbodrills — past and present: Paper presented 

 at 16th Ann. Mtg. of the Am. Assoc. Oil-Well Drilling Contractors, Fort Worth, p. 7, 9. 



Tiraspolsky, R. R., and Chare, J., 1955, Drilling with subterranean motors and the de- 

 velopment of turbodrilling: Revue de LTnstitut Francais du Petrole, p. 35, 48. 



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