564 



Subsurface Geologic Methods 



The single shot, barrel, and accessories are rented to operators on a 

 daily or monthly rental basis. All supplies are furnished and service calls 

 are made at the well to check and adjust the instrmnent (fig. 287). Most 

 drilling crews are well acquainted with the operation of this instrument 

 and can use it whenever necessary. 



Table 29 shows data on the regular single shot and barrels. 



The Eastman small- type single shot (fig. 284) is similar in construc- 

 tion and operation to the regular machine except that it is 1^ inches in 



Figure 287. Regular single shot and supplies. 



TABLE 29 

 Regular Type Single Shot 



Diameter 



Length 



Weight 

 (lbs.) 



Instrument (5° to 30° units) 



Instrument (90° unit) 



Open hole barrel* 



Inside Barrel* * 



Kit box and instrument 



31/4 

 3 

 7 in 



O.D, 

 O.D. 

 O.D. 

 O.D. 



7 in. 



26 in. 

 29% in. 

 7 ft.-8 ft. 

 9 ft.-17 ft. 



30% in. 



* Collar threaded 2^/^ in. A.P.I, external upset 10-thread tubing. 



5 



6 

 112 

 145 



29y2 



* * Inside type barrel available with wire line coring equipment connections as required, 

 diameter instead of 2^ inches. The contact timing watch is a duplicate 

 of that used on the type "M" drift indicator. Except for size, angle units 

 are identical in range and construction with those for the regular single 

 shot. No 5-degree, small, single-shot angle units are made. The disc is 

 smaller, as are the loader and unloader. This surveying instrument was 

 developed for a special purpose. With the increasing use of retractable 

 wire-line coring equipment, a demand was created for an instrument that 



