flank of the salt dome. In these ways a number of reservoirs at different depths 

 along the flank may be penetrated. 



The foregoing examples are only a few of the ways in which directional 

 drilling is used in modern oil-well-drilling practice. Other applications are com- 

 mon in other oil provinces, and unique solutions are frequently applied to 

 special problems. 



BIBLIOGRAPHY 



Eastman, H. John, 1940, Directional drilling: International Oil, Oct. 



Murdoch, J. B., 1951, Controlled directional drilling and oil-well surveying: in 



Subsurface Geologic Methods, 2d ed., Golden, Colorado School of Mines, p. 504-591. 

 Standard Oil Company of California, 1955, Pacific treasure: The Standard Oiler, p. 1-4, Aug. 

 Uren, L. C, 1946, Petroleum production engineering: Oil Field Development, New York, 



McGraw-Hill, p. 367-376. 



694 



