drill pipe
Dongying Haihe Machinery Co., Ltd located in Dongying Shandong China is a professional manufacturer of investment castings, lost wax castings or precision castings. And both of sodium silicate and silica sol process had been adopted. We mainly produce stainless steel castings, carbon steel casting and alloy casting. Our comany is a group company with three branches, the other is oil tool company, product the drill pipe for oil, bushing for oil, aiguille, heavey drill pipe etc,welcome domestice

  Dongying Haihe Machinery Co., Ltd located in Dongying Shandong China is a professional manufacturer of investment castings, lost wax castings or precision castings. And both of sodium silicate and silica sol process had been adopted. We mainly produce stainless steel castings, carbon steel casting and alloy casting. Our comany is a group company with three branches, the other is oil tool company, product the drill pipe for oil, bushing for oil, aiguille, heavey drill pipe etc,welcome domestice and abroad clients to contact with us and visit our company, hope we can establish long term business relationship! Our products include kinds of flanges, valves, marine hardware, construction hardware, house hardware, automobile part, motorcycle part, hinge, devices for hydraulic press and for oil extraction, cross fitting, golf head and we also produce the oil tools, such as drill pipes, drill bit and so on. We are keen to have the opportunity to cooperation with friends all over the world.