钻柱共振是引起深井钻具失效的主要原因。
Drill string resonance is the major cause of drill tool failure.
在钻具失效事故中，钻铤的疲劳失效尤为突出。
In the event failures of boring tools, the fatigue failure of the drill collar is especially prominent.
石油钻铤螺纹联接失效是钻具失效的主要类型。
The failure of collar connection thread is one of the prime drill tool failures.
但是，在其逆掩推覆带钻井作业中，极易发生钻具失效事故。
However, the accident of drill string damage happened easily in the overthrust nappe belt of these regions in the drilling.
文中分析了使用偏轴接头对钻具各部分受力情况的影响及导致钻具失效的原因。
This paper analyses the influence of excentric shaft connection on force case of drill tool, and discusses the causes of drill tool failure.
钻铤螺纹联结失效是钻铤失效的主要因素，在整个钻具失效事故中占很大比例。
The fatigue failure of drilling collar thread linking is a main factor of the drill collar failure, which accounts for a large proportion of the accidents in the drilling tool failure.
现场钻具失效资料的统计分析表明，在钻具失效事故中稳定器失效占有很大一部分。
The statistics of drill tool failures from the oil field shows that failures of the stabilizer are large part of failures of drill tool failures.
初步确立了空气钻井钻柱冲蚀磨损机理，提出钻屑冲蚀是促使钻具失效的一项重要原因。
Establish the erosive wear mechanism of drilling string in air drilling and put forward that erosion wear is a substantial cause to promote drill string failure.
随着气体钻井数量的增加，钻具失效问题日益突出，已影响到气体钻井的安全和推广应用。
However, with the well number increasing, the drilling tool failure is outstanding gradually, which has safe effect and extends the application of air drilling.
振动问题一直是引起底部钻具失效的主要原因，对其进行研究能减小钻具损害和各类井下事故的发生。
Research on vibration problems which is the main reason causing bottom drilling tool failure, can reduce drilling tool damage and emergence of underground accidents.
针对钻具失效影响因素比较复杂的问题，建立了基于支持向量机和聚类分析理论的钻具失效原因分析模型。
Considering the complex influence factors for the failure of drill stem, an analytic model for failure of drill stem based on support vector machine and cluster analysis theory was established.
结果表明，井底温度高、钻具存放及钻井过程中的腐蚀和地层可钻性级值高且断层多，是该地区钻具失效的主要原因。
The result shows that the main reasons are high bottom hole temperature, corrosion of drilling tool during storage and drilling process, high value of formation drillability, and multi-fault.
螺杆钻具外壳体是螺杆钻具的关键零部件，也是易失效件之一。
The shell of positive-displacement motors is the key component of down-hole motors, it is also a main vulnerable parts.
在钻井施工作业中，螺杆钻具常因砂卡导致螺杆马达工作失效，导致螺杆钻具报废，严重影响了正常钻井作业。
During drilling process, screw drill motor sometimes doesn't work properly or even seriously damaged because of sand jamming.
通过对安棚、赵凹区块钻具早期先期失效现状调查，得出了钻具早期失效的主要模式及产生原因。
By means of the survey at Anpeng and Zhaowa Blocks, the main modes and the causes of drilling tool failure in earlier period are found out.
为了达到较好的防斜目的，必须增大钻进时钻头的转速，在高转速的作用下，偏轴接头加剧了钻具先期疲劳失效。
By the action of high roatry speed, excentric shaft connection intensifies the fatigue failure of drill tool.
为了达到较好的防斜目的，必须增大钻进时钻头的转速，在高转速的作用下，偏轴接头加剧了钻具先期疲劳失效。
By the action of high roatry speed, excentric shaft connection intensifies the fatigue failure of drill tool.
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