Therefore lost circulation has always been an urgent technical problem in the process of well drilling.
所以，井漏一直是钻井工作中亟需解决的技术难题。
Five-well drilling practice has shown that steering drilling can create significant profits under certain conditions.
五口试验井实践表明，在一定条件下使用导向钻具，可取得明显的经济效益。
It is most important to accurately determine the well bore path and effectively control the layers while horizontal well drilling.
在水平井作业过程中，准确判断井眼轨迹方向，有效控制层位尤为重要。
The traditional technique of salt well repairing and controlling in Zigong area is an important part in the system of Chinese well drilling technology.
自贡地区的传统修治井技术，是中国古代钻井技术体系中的重要组成部分。
Study on rock mechanics of deep wellbore, especially on rock drillability and rock anisotropy is a key project to resolve the problems of deep or ultra-deep well drilling.
深部井眼岩石力学的研究，特别是深部井眼岩石可钻性和岩石各向异性的研究，是解决深井、超深井钻井关键技术的重要课题。
Roller bits are used widely in water well drilling.
目前牙轮钻头已较为广泛地用于水井钻探。
It provides reference for similar well drilling operations.
旨在为类似地层钻井作业提供参考。
Angle measuring MWD tool is widely used in field well drilling.
随钻测斜仪在钻井现场中应用相当广泛。
Early failure occurred to offshore petroleum well drilling pipeline.
海上石油钻井管线发生早期穿孔失效。
There is little mobility for supervisors from well services to well drilling.
油井钻探和油井服务主管之间几乎没有流动性。
In CBM well drilling construction, oil drilling techniques are basically adopted.
煤层气钻井施工中，基本上采用石油钻井工艺。
In CBM well drilling construction, oil drilling techniques are basically adopted.
在煤层气钻井施工中，基本上采用石油钻井工艺。
Drill rod and collar are key apparatus in drilling exploration and well drilling industry.
钻杆和钻铤等管状螺纹联接件是钻探和石油钻井工业中的关键设备。
How to improve the quality of slim hole cementing is a difficult problem of perplexing well drilling.
如何提高小井眼固井质量是困扰钻井行业多年的老问题。
Among oil well drilling equipment and tooling, the high - strength drill pipe plays a very critical role.
高强度石油钻杆在钻井设备和工具中占有十分重要的地位。
The synthetic method of potassium methyl silicate and its application in oil-well drilling were investigated.
研究了甲基硅酸钾的合成方法及其在油田钻井中的应用。
The waste water from well drilling and other operations has imposed difficulty in oil field waste water treatment.
钻井和其它作业废水是油田污水处理的一个难点。
The air-driven down-hole hammer drilling is still very effective and speedy in well drilling in karst limestone area.
在水文水井中，气动潜孔锤钻进仍可发挥它高效率、高速度的作用。
During ultra deep well drilling, we will be confronted with high temperature, high pressure and complex produced fluid.
但在超深井钻井过程中，面临地层高温、高压、产出流体相态复杂，这对环空携岩和安全是一个严峻的考验。
Wellbore stability, hole cleaning, toque and drag are key factors in extended reach well drilling of Xijiang 24 - 3 - A14.
西江24—3—A14大位移井的摩阻与扭矩、井眼稳定性及井眼清洁是钻井成功与否的关键因素。
The development of radial horizontal well drilling technology was under the studies on swirling jet theory and rock failure mechanism.
旋转射流理论和破岩机理研究，研制了径向水平钻井技术。
In well drilling industry, the rising energy consumption is becoming an increasingly serious problem, thus causing greater cost pressure.
在石油钻井施工企业中，耗能上升趋势日益严重，能源消耗带来的成本压力越来越大。
The findings can provide theoretical guidance and proposal for horizontal well drilling and development design of this kind of reservoir.
研究成果可为此类油藏的水平井钻井和开发设计提供理论指导和建议。
Based on the multivariable random drilling model, the multi objective reliability optimization of deep well drilling parameters is presented.
在多元随机钻井模式理论的基础上，提出了深井钻井参数多目标可靠性优化方法。
The principle of reaching balance drilling and under balanced drilling using foam mud in water well drilling in Karst formation was presented.
分析了岩溶地层水文水井施工中，泡沫实现平衡压力或欠平衡压力钻井的原理及影响泡沫钻井有效井眼压力的因素。
Based on the nonlinear FEM, a mechanical model for PDM used in medium - and short-radius horizontal well drilling is established in this paper.
应用非线性有限元法，建立了中短半径水平井螺杆钻具力学模型。
Its extracting method includes surface well drilling and underground mine tunnelling. The tunnelling method is suitable for many mine areas in our country.
开发煤层气的方法有地面钻井开采和井巷开采两种，其中井巷开采方法适用于我国许多矿区。
The mathematical model for evaluating sidetrack horizontal well drilling is developed by using the fuzzy mathematical theory and analytical hierarchic process.
针对侧钻水平井钻井的特点，应用模糊数学理论和层次分析方法，建立了侧钻水平井钻井综合评价模型。
Fracture tooth of gear shaft in well drilling pump was analysed by chemical analysis, mechanical testing metallographic examination macro and microfractography.
采用化学成分分析、力学性能测定、金相检验以及断口宏、微观分析等方法，对钻井泵齿轮轴断齿进行了分析。
The instability of the horizontal hole in unconsolidated sand reservoir is the main topic which must be considered during the horizontal well drilling operation.
在疏松砂岩油藏中钻水平井首先要解决的是井眼失稳问题。
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