| Place of Origin |
Jiangsu China (Mainland) |
| Brand Name |
TianYe |
| Type |
Other |
The circulating sub is a specialized tool for circulating drilling fluid when running in casing on the way or finishing running casing down-hole. According to actual needs, there are circulating sub with casing thread and circulating sub with union thread. Basic Parameter Thread TypeI.D.(mm)Length (mm)Drill pipe box connectionCasing threadNC385 BTC575005 LTC5 ST & CNC385 1/2 BTC575805 1/2 LTC5 1/2 ST & CNC507 BTC716007 LTC7 ST & CNC509 5/8 BTC716209 5/8 LTC9 5/8 ST & CNC5010 3/4 BTC7167010 3/4 LTC10 3/4 ST & CNC5013 3/8 BTC7167013 3/8 LTC13 3/8 ST & C