Authorization & Certificates

· (Well head, BOP) Shenkai, Sanyi

· (Solid Control Equipment, Shakers) GN Solid, KES Solid, ZH Solid, Bostar

· (Mud Pump) BOMCO, TSC, GD, NATIONAL, EMSCO, HH

· (Line Pipe) PCK(ERW), Lontrin(SMLS), Jiuli(SS, AS), Hengyang(SMLS)

· (OCTG) Baosteel, TPCO, Dalipal, Fengbao, Valin, TTGM etc

· (Drill Pipe) Shuguang Huayang, Hilong, DP Master, ZYSCO