一、概况在澳大利亚堪培拉地区,美国长年公司Q系列绳索取心装置已使用多年,由于地层复杂,以及钻孔变深和定向钻进的增加,Q系列钻杆经常失败,事故频繁,钻杆寿命显著缩短,因此,在1978年购进1200米长年 I. Overview In the Canberra region of Australia, Q series ropes coring devices of the US for many years have been used for many years. Because of the complicated strata and the increase of drilling depth and directional drilling, the Q series drill pipe often fails with frequent accidents. Life expectancy is significantly shortened, so in 1978 bought 1200 meters long