inner tube

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。