Hejian Huanyu Petroleum Machinery Co., Ltd. Was established in 1998,located in Cangzhou which is in the industrial zone of Cangzhou city ,and enjoys good location and convenient transportation.Huanyu specializes in Tricone Bits (Steel tooth and TCI bit),PDC bits,Reamer bit,drill pipe,drill collars,engineering bits,stabilizers, for water well ,oilfield,construction and underground foundation work all over the world.All of our products are in accord with API and ISO standards.