Provide all kinds of dowel pins,sheel pin, double cone pin (Forging blank&finish maching) for drilling rigs We are professional manufacturer of oil equipment forging in China, our product include: all kinds of dowel pins,sheel pin, double cone pin, Casing head forging, tubing head forging, casing spool forging, tubing spool forging, three-way, six-way forging, eight-way forging, valve body ...