挠性钻杆是实现高精度定向钻孔技术的关键器具之一。
The flexible drill string is one of the key tools to materialize the high accuracy directional drilling technique.
在测点数据有限的情况下，探讨定向钻孔轨迹的模拟方法，并通过实例分析模拟方法的可靠性。
Simulation method of directional drilling course was discussed under limited survey point data, and the reliability of simulation method was analyzed with cases.
水平定向钻孔(HDD)常常是管道穿越河流或湿地这类障碍优先选用的方法。插图表示河流穿越的典型情况。
HDD is often the preferred method for constructing the pipeline across such obstacles as streams or wetlands. (See inset diagram.) Here is shown a typical river crossing.
笔者对3D定向钻孔雷达系统的工作和成像原理、技术规格进行了详细说明，并结合现场数据说明了其实际应用效果。
The authors deal with the working and imaging principles and technical specifications of the 3D directional borehole radar in details and, combined with field data, show its true application results.
详细介绍了高阳铁矿实施大位移定向钻孔注浆方法和工艺参数，其成功的经验对治理矿山井下突水淹井事故具有一定的参考价值。
The method of cement slurry injection through big-shift directional drilling and its technological parameters used in Gaoyang Iron Ore Mine to seal underground water rushing are introduced.
叙述了在定向钻进的钻孔轨迹设计时，地面不平整度修正的方法与应用。
Method and its application of uneven ground modifying in directional drilling locus design are narrated in this article.
定向钻进技术已经成为煤矿井下抽放瓦斯长钻孔施工成套技术的关键环节。
Directional drilling technique has already become a key link in long broach construction for gas drainage of the mine.
建议今后从地表填图、钻孔岩心编录、岩心定向、坑道编录等方面加强工程地质资料的收集。
It is suggested that the collection of following information on drill core record compiling, core orientation, mine opening geological record compiling, et...
建议今后从地表填图、钻孔岩心编录、岩心定向、坑道编录等方面加强工程地质资料的收集。
It is suggested that the collection of following information on drill core record compiling, core orientation, mine opening geological record compiling, etc., should be strengthened from now...
从水平定向钻进的工程实际出发，借助于现场钻进数据库，建立了自然参数模型，给出了相应的钻孔轨迹预测算法。
A natural parameter model to forecast the direction of the actual borehole based on the local drilling database in practical situation is studied.
本实用新型公开了一种用骨科手术穿针、钻孔的定向骨科手术定位器。
The utility model discloses a directive localizer for orthopedics surgery using orthopedics surgery for puncturing needle and drilling.
本文介绍了在沉井上部搭台架设钻机，进行水下钻孔，孔内分层定向爆破技术。
This paper introduces a technique of erecting framework and rig at the upper part of the caisson, making underwater boring and oriented explosion by layers within the bore hole.
该定向钻探系统包括一根构成能连续地和精确地在地面上钻孔并且无需周期地断开其连接的钻杆柱。
The guided drilling system includes a drill string configured to continuously and accurately bore a hole in the ground without the need to periodically break the connection of the drill string.
该定向钻探系统包括一根构成能连续地和精确地在地面上钻孔并且无需周期地断开其连接的钻杆柱。
The guided drilling system includes a drill string configured to continuously and accurately bore a hole in the ground without the need to periodically break the connection of the drill string.
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