- Qingdao Hna Oilfield Equipment Manufacturing Co., Ltd.
- Mud Pump Parts
Shandong
- Union Steel Industry Co., Ltd.
- Steel Pipe, Seamless Steel Pipe
Hunan
- Ningbo Zhongmu Rubber Products Co., Ltd
- Rubber Products, Rubber Accessories, Sealing Ring, Oil Seal, Rubber Shock Absorber, Phenol Resin Products, PU Products, PTFE Products, PFA Products, High-Speed Train Accessories
Zhejiang
- Juli Sling Co., Ltd.
- Steel Wire Rope, Lifting Sling, Mooring Rope, Ratchet Straps, Lifting Chain, Shackle, Elevator Link, Lifting Hook, Lifting Beam, Chain Block
Hebei
- Best-all Petroleum Machinery Co., Ltd.
- Mud Pump Liner; Mud Pump Piston; Valve Assembly; Cylinder Liner; Bi-Metal Liner; Mud Pump Cylinder
Shandong
- Hebei Yingpai Import & Export Trading Co., Ltd.
- Drilling Rig Equipment and Parts, Mud Pump and Parts
Hebei