TS180TS275TS330, These three specifications can meet to the needs of drilling holes from 203mm to 660mm in diameters.
They are specially designed for drilling holes with depth over 500 meters.

Every part for impacting and connecting adopt specialized steel with high strength, unique heat treatment, and more accuracy machining. The whole sets are very reliable. A protection device is added to avoid any abnormal conditions under the deep well.
They suit to geological exploration, oil and gas well drilling and some other deep hole drilling.