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为了配合小口径钻进,从1973年起我队使用了高频淬火钻杆,取得了较好效果.一使用条件1.高频淬火钻杆规格φ50钻杆1000米,蹾粗车内扣,接头用我队小电弧炉炼的铸钢材料,结构粗糙,质量较差;φ43钻杆3000米,壁厚6.35毫米,不蹾粗车内扣,接箍用40铬钢制,未经调质处理.2.钻进地层大理岩、长英大理岩、角闪石英大理岩、辉绿辉长岩、角闪熔岩磁铁
In order to cooperate with the small diameter drilling, our team has used the high frequency quenching drill rod since 1973, and achieved good results. 一 Conditions of Use 1.High frequency quenching drill pipe specifications φ50 drill pipe 1000 meters, 蹾 rough car buckle, The joints are made of cast steel with a small electric arc furnace and have a rough structure and poor quality. The φ43 drill pipe is 3,000 meters thick and has a wall thickness of 6.35 mm. The buckle is not made in the rough car. The coupling is made of 40-chrome steel without quenching Processing .2 drilling into the stratum marble, Changying marble, hornblende marble, Hui green gabbro, horn flash lava magnet