国内进行了螺旋钻进和常风压空气钻进的尝试，但效果一般。
In China, the screw drilling and the normal pressure compressed air drilling were conducted for trial and the results were not so good.
钻机可适用多种钻进工艺方法，如合金回转钻进螺旋钻进潜孔锤钻进跟管钻进等。
8 the rig is suitable for various drilling methods such as carbide bit drilling, auger drilling, DTH hammer drilling, follow - up casing drilling, etc. 3.
将仿生非光滑理论应用于螺旋钻头设计上，以解决粘性土钻进中螺旋钻头阻力大、粘附严重的难题。
The bionics theory was applied on the spiral bits, and then a non-smooth spiral bit was designed and processed for carried out the problem of serious sticking.
该设备经过现场试验，取得了理想的效果，有效地解决了水平螺旋钻机钻进过程中控向的难题。
Through the field tests, the machine reaches the aim to resolve effectively the difficult problem on direction control during horizontal drilling.
以施工实践为基础，结合理论分析，提出了一种在岩土锚固工程施工中广泛应用的新型钻探工艺技术———螺旋冲击回转钻进技术。
Combined with projects, this paper introduced several kinds of anchor drilling technics in side slope anchoring project by anchorage cable and anchor rod.
螺旋钻头底部阀门防止钻进过程中钻屑进入到空心的混凝土管中，当钻杆提出同时混凝土浆注入时，钻杆底部的阀门将被打开。
The valve at the bottom of auger can prevent drilling bits entering hollow pipe during operation. When drilling pipe is taken out and concrete grout is injected, the valve will be opened.
螺旋钻头底部阀门防止钻进过程中钻屑进入到空心的混凝土管中，当钻杆提出同时混凝土浆注入时，钻杆底部的阀门将被打开。
The valve at the bottom of auger can prevent drilling bits entering hollow pipe during operation. When drilling pipe is taken out and concrete grout is injected, the valve will be opened.
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