1.
Study on drill bit for large diameter core drilling of deep hole in hard rock
硬岩深孔大口径取芯钻进的钻头研究
2.
THE COMPARISON BETWEEN SMALL-HOLE ROPE CORING AND COMMON CORING
小口径绳索取芯法与普通钻进取芯法比较
3.
Drills the Core Method of Sampling about the Improvement Semi-rigid Basic Unit the Suggestion
关于改进半刚性基层钻芯取样方法的建议
4.
Selection of Drill Tool of Testing in Mixing Pile with Core Drilling Method
水泥土搅拌桩钻芯法检测钻具的选取
5.
Application of Flush Liquid to Diamond Drilling with Rope Getting Core Technique in Old Mining Area of Yunnan
绳索取芯金刚石钻进冲洗液在云南老厂矿区的应用
6.
so every so often a sample is obtained with a coring bit.
因此时常要用取芯钻头取样。
7.
Drilling Fluid Technology Research on Mirabilite Mine Core Drilling in Guyuan of Ningxia;
宁夏固原芒硝矿取芯钻探钻井液技术研究
8.
Improvement and Development of Core Drilling Method in Scientific Drilling
科学钻探取心钻进方法的改进和发展
9.
electrically driven rotary sidewall sampler
电动钻进式井壁取心器
10.
Main Causes and Countermeasures of Mud Cake in Wire-line Coring Drilling
绳索取芯钻探中泥皮产生的原因和对策
11.
Construction Method of Coring for Pore Forming Based on Water Drilling of Super-diameter Rock Pile
超大直径岩石桩水钻取芯成孔的施工技术
12.
Application of Core Drilling Collecting Rate to Evaluate Seam Gas Content and Distribution
应用钻探岩芯采取率评价煤层瓦斯含量及分布
13.
Research on Bionic Coupling Diamond Coring Bits in Drilling Hard Rock
硬岩钻进用仿生耦合金刚石取心钻头研究
14.
Selection of Core Drilling Method for WFSD-2 of Wenchuan Earthquake Scientific Drilling Project
汶川地震科学钻探二号孔取心钻进方法的选择
15.
Analysis of Dependence Relation of GPR and Core-drilling Used in Pavement Thickness Detection
探地雷达与钻孔取芯在路面厚度检测中的相关分析
16.
DEVELOPMENT AND TESTS OF LOW-TEMPERATURE ELECTROPLATED81/2" PDC CORING OIL BITS
低温电铸8(1/2)″复合片取芯油井钻头的研制与试验
17.
Analysis of forces on the graphite mold of core bit for oil during hot pressing
石油取芯钻头石墨模具在热压过程中的受力状况分析
18.
A new type of thin-wall diamond core drill bit for replacing concrete sleeper bolts
铁路混凝土轨枕硫磺锚固螺栓拔出用金刚石取芯钻头