1.heat-treating craftwork, 2.wearing inner sleeve . 3.inner sleeve have 28 Cr .

Liner are made through heat-treating craftwork,with wearing inner sleeve .liner have 28 Cr . The using time of our liner is above 1000 hours,and is the one time as greater as normal products.our liner can reduce the cost for oilweild and improve the drilling  efficiency .

Our liners are sold well at home and aborad,such as The South America ,Egpyt and so on.

Good quality UNBT-600 Liner