China Oilfield Equpment Manufacturers

Jining Donghong Machinery Co., Ltd

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1st Machinery Works of North China Petroleum
3H (Shanghai) Petroleum Equipment Co., Ltd.

Anhui Tunxi High Pressure Valve Factory 

Anshan Aotong Steel Pipe Plant 

Anshan Dragon Pipe Industries Co., Ltd. 

Baoji Oilfield Machinery Co., Ltd. 

Baoji Petroleum Steel Pipe Co., Ltd.

Baoji Rigor Petroleum Machinery Co. Ltd.

Baoji-SMI Petroleum Steel Pipe Corporation 

Baoyi Valve Group Co., Ltd. 

Beijing Petroleum Machinery Factory 

Beric-Davis Companies International, Ltd. 

Beric-Davis Companies International, Ltd.

Bohai NKK Drill Pipe Co., Ltd. 

Bohai Oil Engineering Company 

Boteli Valve Group Co., Ltd.

Cangzhou OCTG Co., Ltd. of Huabei Oilfield