472 



Subsurface Geologic Methods 



Sometimes the upper part of a well may be drilled at such a rate 

 that two-foot timing is desirable. In this case the horizontal or time scale 

 will be one-half that for one-foot timing so that the relative amplitude of 

 the curves will remain the same. The time scale should be given on the 



Operator A» B. C. Oil Co . . 



Well No. 1 Fee 



f.-pi H Wildcat 



PnrJQh XYZ County, Any State 



Date Recor d Feb. 2k, 19h9 



Drilling Note g Bit No. 12 Type 



Mud Weight 9.6 lbs. Viscosity 38" 



RpTTiarV q Depths Off 1 ft. 6063-6080' due to pick up and creep. 



Figure 219. Drilling-time record. 



