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>> products >> Drilling Tools >> Joint
 
product name: Circulating Sub
Description:
Circulating sub is a special tool for circulating drilling fluid when setting casing midway or finished. Including casing thread circulating sub and union thread circulating sub.
   Specification
Specification of circulating sub  
 
drilling pipe box thread
casing thread
borehole
length(mm)
 
NC38
5″BTC
57
500
5″LTC
5″STC
NC38
5″BTC
57
580
5-1/2″LTC
5-1/2″STC
NC50
7″BTC
71
600
7″LTC
7″STC
NC50
9-5/8″BTC
71
620
9-5/8″LTC
9-5/8″STC
NC50
10-3/4″BTC
71
670
10-3/4″LTC
10-3/4″STC
NC50
13-3/8″BTC
71
670
13-3/8″LTC
13-3/8″STC
 
 
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