2m long core barrel and twisted it off.
60m时,扫孔用岩心管被扫落的钻杆接头碎块卡住拧断,透孔时发现孔内遗留3。
Application of Lengthening Coring Barrel of SYZX75 Wire-line Coring Hydro-hammer
SYZX75绳索取心液动锤加长岩心管的应用
The effect is not apparently when using methods of large-diameter barrels,cementation and so forth during branching drilling in Cenozoic loose beds.
采用粗径岩心管、水泥封闭等方法在新生界松散层中人为叉孔有时效果不太明显。
Seamless steel tubes standard use diamond core drilling
GB3423-1982金刚石岩心钻探用无缝钢管
But there is no proven potential, despite encouraging core samples and much speculation.
尽管已经有了鼓舞人心的岩心样品和种种推测，但还缺乏有力的证据。
The Determination of Rock Mechanics Parameter of Reservoir Core During Sandstone Matrix Acidizing
砂岩基质酸化前后储层岩心岩石力学参数测定
Cuttings and core from the drill-holes have intersected conglomerate bands.
钻粉和岩心已穿过了砾岩夹层。
There are infiltration center on lava and agglomerates.
在熔岩或集块岩上有渗漏中心存在。
Lithogeochemical characteristics of No.5 pipe-like lamprophyre in Ningxiang,Hunan province
湖南宁乡Ⅴ号岩管煌斑岩的岩石地球化学特征
continuous sidewall core cutter
连续式井壁岩心切割器
Europa must have a molten core
其核心部分必定是熔岩，
permeability plug
测定渗透率的岩心块
retractable ore barrel
可缩小取出的岩心筒
hard rock coring tool
坚硬岩石井壁取心器
weight-saturation method
称重测岩心饱和度法
Core orientation and its Progress
钻探定向岩心的用途和岩心定向技术的进展
Three dimensional simulation core restoration based on core outside surface images
基于岩心外表面图像的三维模拟岩心恢复
Study on short core and long core flow simulation tests during sandstone matrix acidizing
砂岩基质酸化中的短岩心和长岩心流动模拟试验研究
The casing was driven into the soft muds in the top.
套管被送入软岩粉顶。