OCTG Products

  • Drill Collars

    Drill Collars

    Drill collar as one component of a drill string is extremely industrial tubulars used to drill into ground to provides weight on bit for drilling. It is used to conjunction with drill pipe. There are slick and spiral grooved types mainly. Our manufacturing process is certified to API spec 7-1. The drill collar is made of AISI 4145 H or 4145 H Modified alloy steel. Bores are trepanned from one direction with no mismatch. All drill collars are heat-treated with hardness within 285 to 341 BHN, w...
  • Heavy Weight Drill Pipe

    Heavy Weight Drill Pipe

    Integral heavy weight drill pipe is the transition zone between drill collar and drill pipe. It can not only reduce stress-formation in the connection of drill collar and drill pipe, but also reduce the wear on OD. Integral heavy weight drill pipe is made from one piece of AISI 4145H solid bar, fully heat treated, all physical properties conform to API spec7 latest edition. HWDP’s wear resistance hard banding is standard on tool joints connections and central upset. The types of hard banding ...
  • Tubing and Casing Coupling

    Tubing and Casing Coupling

    Casing coupling is a short pipe applied in connecting two casing pipes which have threads. The pipe coupling has internal threads machined to match the external thread of the long joints of casing. The two joints of casing pipes are screwed into opposite ends of the casing coupling. Through their strength can be normally made of the same grade of steel as the casing. All casing couplings are manufactured in accordance with API 5CT specification of the latest edition. Properties of Casing Coup...