1.
Drag bits are used most commonly in soft formations.
在松软岩层中最常用的是钢砂钻头。
2.
back-brake support
顿钻捞砂轮刹车支架
3.
Discussion on the construction technology of borehole pile in the sand bed
浅谈在砂层中钻孔桩施工的技术措施
4.
Keywords: dressing, grinding wheel, wear, diamond form roller.
关键词：修整、砂轮、磨耗、钻石磨轮。
5.
Study of mixed gas production simulation test for drilling fluid and sandstone
钻井液与砂岩混合产气模拟实验研究
6.
Water well construction using directional circulation drilling technology in sandy gravel aquifer
砂砾含水中正循环钻进水井施工初探
7.
Quaternary Sand Aquifer Drilling Dewatering in Junde Coal Mine
峻德矿含水第四纪砂层地表钻孔疏干
8.
The Research on Drilling Techniques of Following the Geological Target While Drilling for Sandstone and Conglomerate Reservoir in Xin Jiang MoBei Oilfield;
新疆莫北油田砂砾岩油藏随钻跟踪地质目标钻井技术研究
9.
The analysis and application of specific gravity of slurry in bore pile construction through sand seam
穿过砂层钻孔桩施工中泥浆比重的分析与应用
10.
Research on Core Drilling in Loose Formation from In-Situ Leaching Sand Uranium Deposit;
地浸砂岩型铀矿松散岩层取心钻进技术研究
11.
Mathematical Model and the CAD System of the Grinding Wheel for Drill's Flute;
加工钻头螺旋槽用砂轮的数学模型及其CAD系统
12.
The Neural Networks Method Model May Study Application in Nature Intensively in Compact Sandstone;
基于神经网络方法在致密砂岩可钻性中的建模
13.
Application of post-conglomerating technology in processing expansion concrete piles used for solid-stratum earth;
厚砂层地区钻孔灌注桩后注浆技术应用
14.
Construction technology and cost analysis of bored piles with high pressure & sand free grouting;
高压无砂注浆钻孔桩施工工艺及成本分析
15.
Successful application of horizontal directional drilling to pipe-laying construction through sand gravel strata
水平定向钻进技术在砂卵砾石层中的成功应用
16.
Triaxial Tests Effect Study on Drilling and Pumped Sands of Gravelly Soil
砾质土钻孔灌砂工艺三轴试验效果研究
17.
Consolidation and drainage effect of drilling and sand replacement samples in consolidated drained triaxial tests
三轴试样钻孔灌砂固结排水效果试验研究
18.
Applied Study on Post-Grouting Technology for Long Bored Pile down into Sand Layer
钻孔灌注长桩进入砂层的后注浆技术应用研究