172 



DEEP BOREHOLE SURVEYS AND PROBLEMS 



does not render the direction of deviation but the amount 

 only. It is well suited to rapid, simple and fairly accurate 

 records for working or completed wells. It is essentially 

 a pendulum or plumb-bob recording device in a cylindrical 

 watertight housing. The lower end of this housing is 

 externally threaded and it is attached to the bit or core 

 catcher. The original Kinley instrument^ was lost in a 

 Texas company well. Here the recording unit (Fig. 112) 

 includes a support frame B with an upturned arm on a 



250 



~y 



Fig. 111. — A Rumanian borehole surveyed by the 

 Denis-Foraky teleclinograph in 1925; plan of the hole 

 No. 8, "Steaua Romana" 17. 



Fig. 112. 



vertical plate on its upper end. The lower end of this plate 

 has an inturned arm for mounting a rewind mechanism. 

 Ball bearings A on the inturned arm at the lower end of the 

 plate assist the upper ball bearings A to hold the recording 



1 Smiley, T. F., Oil Gas Jour., p. 44, Apr. 25, 1929. 



