568 



busch. SUBSURFACE TECHNIQUES 



[Ch. 31 



LOCATION OF WELL 

 350' FEL, 450' FNL 

 Sac 2059 , TE6L 

 Survuy 

 ELEVATION 234' OF 



CASING RECORD 



1809' ot 10 3/4" 



LEGENO 

 NB-NEW Bit NCB-New Cone Bit 



NR-No Returns Available For Analysis 

 CO- Stopped Drilling To Circulate Returns 



REMARKS 

 CORRESPONDS To DRILL PIPE MEASUREMENTS 



Fig. 4. An example of a drilling-rate log. This log shows continuous instrumental 

 logging of a well bore in which percentage of sand in the cuttings and drilling 

 rate, in feet per hour, are shown on the left side of the log. On the right side 

 of the log, oil, total gas, and methane are indicated from analyses of both the 

 drilling mud and cuttings. (Courtesy of Baroid Well Logging Service.) 



