The performance difference between air crew drill and mud motor was analyzed under the air drilling condition.
对比分析了空气螺杆钻具与泥浆马达在空气钻井井况下的性能差异。
Referring to the condition that occurs when the kelly is all the way down, so drilling progress cannot continue.
方入是指发生了这样的情况，即方钻杆全部进入到补心内，导致钻井进程不能够继续下去。
Drilling tool safety is the essential condition and important safeguard for the safe and high-efficient exploration and development for oil and gas resource.
钻具的安全是安全高效地进行油气资源开发的基本条件和重要保障。
Based on the theory of elasticity and molar-Coulomb strength failure criterion, we proposed the prediction method for hole enlargement ratio in the condition of underbalanced drilling.
基于弹性力学理论及岩石摩尔-库仑强度破坏准则，提出了欠平衡钻井条件下井径扩大率的预测方法。
Although under very difficult condition the drilling engineers were determined to drill this well through to the end.
虽然处境困难，但是钻井工程师们还是决定把这口井打完。
Aiming at the fractured mechanism of mine shaft lining under the condition of stratum subsiding, a new type of retractable drilling shaft lining structure was proposed.
针对地层沉降条件下煤矿立井井壁的破坏机理，提出了一种新型可缩性钻井井壁结构。
This article briefly introduces the drill bit condition effected during drilling process and the program - Ming technique to drilling data.
简要介绍数控钻孔加工过程中，钻头的受力情况和对应钻孔程序的编制技巧。
Actual Barite consumption will depend on hole condition while drilling.
实际的重晶石用量取决于井下的实际需要。
While under the condition of high temperature and high pressure, the safe drilling in thin safe density window is the technical difficulty that can not be solved well around the world.
随着深部油气藏的勘探和开发，深井及超深井的数量大幅度增加，而深井超深井在高温高压条件下，窄安全密度窗口内的安全钻井是当前国内外都未能很好地解决的重大技术难题。
The calculation method of drilling string axial vibration is given. Meanwhile, the different methods of analysing drilling string axial vibration state are supplied in different surveying condition.
并给出计算任意组合钻柱系统的轴向振动稳态响应的一般方法，提供不同测量条件下分析钻柱轴向振动状态的不同方法。
Complicated formation condition and underground pipe network condition are the important factors that influence the quality of guided drilling of trenchless technology.
地层和地下管网条件复杂是影响非开挖导向钻进质量的重要因素。
Under complex geological condition, drilling quality is the key factor that will decide the success of observation and measurement system of the dam.
在复杂的地质条件下，钻孔质量是影响大坝监测系统成败的关键。
It is proved that the above analysis and introduction have expanded mud logging operation's train of thought on the condition of special drilling technique.
文中所作的分析与探讨拓展了特殊钻井工艺条件下录井作业的新思路。
In order to reduce drilling cost, the casing drilling technique rotated by rotary table and associated tools were developed considering the actual condition of domestic onshore drilling tools.
根据国内陆上油田钻井装备的实际状况，本着降低钻井成本的目的，研究出了采用转盘驱动的适用于陆上油田浅开发井的简易套管钻井技术及其配套工具。
After the drilling operation, we need to move and treat these facilities, excepting the machinery handling rate, for the harsh road condition well site, it also raise questions to the smooth movement.
钻井作业完成后，井场搬迁时要对这些设施进行移运及处理，除了移运费用，对于道路状况严苛的井场，有对设备的顺利移运提出了问题。
When DTH drilling in high confining pressure, its border condition has changed. So new software need to be developed.
潜孔锤在高围压条件下钻进，边界条件发生了变化，需要开发新的软件。
The diesel start is the essential for whole drilling rig and while the supply of compressed air to diesel for start is the necessary condition.
石油钻机柴油机启动是整台钻机的关键之一，而提供压缩空气又是启动柴油机的必要条件。
The drilling operations′condition of 20 odd high angle wells at Qu 104 Block in Linpan Oilfield are introduced.
介绍了临盘地区曲104块20多口大斜度井钻井施工情况。
RSDS will control well path accurately, reduce torque and drag remarkably and improve hole cleaning condition obviously. The drilling practices of ERD will be more reliable if RSDS is used.
用旋转导向系统RSDS进行大位移井钻井，可望相当准确的控制井眼轨迹，大幅度减少钻柱所受的摩阻和扭矩，显著改善井眼的清洁状况。
The measurements, delivered via LWD, also eliminate costly wireline conveyance runs and capture data immediately after drilling when the borehole is in the best condition.
通过LWD进行数据测量，可以避免使用昂贵的电缆测井，可以在井眼刚钻完还处在最佳状态时立刻获取第一手数据。
The crustal stress problem is major difficulty during drilling at the south area of the Base and is the fundamental reasons of the complicated downhole condition during drilling .
地应力问题是南缘地区钻井的主要难点，也是钻井过程中井下复杂的根本原因之一。
The detecting speed is high, the performance is good and the operation is convenient; meanwhile, the requirement to field condition is low and the drilling rod does not need cleaning.
检测速度快，性能好、操作方便，对现场条件要求低，不需要对钻杆进行任何清理。
This paper describes how the rotary drilling stem lost its stability in detail, and presents the main factors influencing drill stem stability in rotary condition.
系统地进行了斜直井中旋转状态下钻柱稳定性的试验研究，描述了旋转钻柱失稳的过程，分析了旋转状态下影响钻柱稳定性的主要因素。
For the scattered small oil field drilling waste water is low, with these devices is a waste, especially in bad road condition.
对于分散的小油田，钻井废水产生量低，配备这些设备是一种浪费，尤其是路况不好的油田。
Ideal drilling machine for tube-plates, baffle plates and flange, in petrochemical, boiler and air-condition industries, also for joint plates in building, bridge, iron tower, etc.
用于石化、锅炉、制冷等行业的管板，折流板和法兰盘钻。也可用于建筑、桥梁、铁塔等钢结构中的联接板钻孔。
It is very important for drilling engineering and geological staff to assess formation lithology and the working condition of bit.
地层岩性与钻头工况的评估对钻井工程技术人员和地质人员十分重要。
Through the crank link system in high-pressured condition of variable speed movement with drilling pump power transfer.
在高压条件下，通过曲柄连杆机构的变速运动实现钻井泵动力的传递。
The drill head for manually drilling has slow rotary speed and does not have temperature increase so that the occurrence of condition such as body tissues burn is avoided.
手动钻孔的钻头转速慢，无温升，可以避免烧糊人体组织的情况发生。
When large dismeter water well is constructed in cobble and boulder strata drilling by percussion machine is not proper to be used as limited by condition.
卵砾石地层钻进是钻探的难题之一，不仅钻进速度低，钻头的使用寿命短，而且钻探成本高。
When large dismeter water well is constructed in cobble and boulder strata drilling by percussion machine is not proper to be used as limited by condition.
卵砾石地层钻进是钻探的难题之一，不仅钻进速度低，钻头的使用寿命短，而且钻探成本高。
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