探讨了材料强度及螺纹强度钻柱失效的影响、复杂地质条件下套管及钻柱的腐蚀疲劳寿命、以及磨损对套管钻柱失效的影响；
The influences of lacking strength of materials and screw thread are treated in this paper, as well as corrosion questions on complicated project situation.
通过石油井下钻具接头螺纹冷滚压工艺的研究可以证明冷滚压可大大地提高接头的疲劳强度。
This article proves that rolling operation can largely enhance fatigue strength through the research on the cold rolling operation of thread root of the drilling tool joint.
方法：通过5年的使用观察，比较成品螺纹桩核与铸造桩核固位力和核的强度。
Methods: Comparing of strength and retention of prefabricated screw and cast metal post-and-core of posterior tooth after 5 years using.
该泵对泵筒、柱塞、固定阀做了设计，改善了泵筒受力状况，提高了螺纹的密封性能和抗拉强度。
The barrel, plunger and standing valve of the pump were designed, improving the barrel's force conditions and reinforcing the screw thread's sealing performance and tensile strength.
螺纹的强度首先取决于它的直径大小。
The strength of FPR thread is mostly decided to the size of diameter.
双针具有很高的拉伸强度螺纹钢筋拼接。
Twin-needle reinforced stitching with a high tensile strength thread.
本文介绍了钢筋等强度直螺纹连接的技术原理、性能特点及其在实际施工中的应用前景。
In this article, the writers introduced the principle of technology of jointing the reinforcement uniform strength straight spiral grains.
钛合金材料由于存在硬度高、强度大等特点，在进行内螺纹加工过程中刀具经常损坏。
With features of superhigh hardness and strength, the cutting tool is broken down frequently when female thread was processed using titanium alloy.
此外，显微组织中网状、块状铁素体的存在以及螺纹表层脱碳使连接螺栓疲劳强度下降也是造成断裂的重要原因。
The existence of reticulation and mass shape ferrite, decarbonization at the screw thread surface layer which induced decline of fatigue strength of connecting bolt were also…
在改善低强度机体螺纹孔强度方面，钢丝螺套作用非常明显。
In the threaded holes to improve low-intensity body strength, the wire thread insert effect is obvious.
内螺纹冷挤压成形是提高内螺纹疲劳强度的有效方法。
Cold form tapping process is an effective method to enhance fatigue strength of internal thread.
通过强度校核，证明此种螺纹法兰安全可靠。
Strength check proves this threaded flange safe and reliable.
同时我公司是华北地区建筑高强度预应力精轧螺纹钢筋最大的经销商。
At the same time my company in North China are building high-strength prestressed steel mill biggest distributor thread.
以高强度阴螺纹钢筋为例介绍了钢筋热处理生产线的自动控制功能。
Taking the high strength PC bar for example, this paper introduce the automatic control function of the heat-treatment line of the reinforcing bar production.
带有螺纹旋进强度的焊接阀座能够为短时排放提供更高水平的安全性能。
Valves with threaded-in strength welded seats offer an additional level of safety against fugitive emissions.
经分析得出：事故原因是减压阀阀座和阀盖的连接螺纹接触高度过小，强度不足，导致螺纹连接失效。
The screw joint of the reducer bonnet and body was concluded as the failure position because of its small contact height.
对螺纹槽管进行了疲劳强度计算，并采用边界元和有限元法对螺纹槽管的应力集中进行了数值分析及静载强度计算。
The stress concentration analysis was done by the finite element method and boundary element method. The fatigue strength and the strength under the static load were calculated.
除了提供机械强度或结构强度外，套管螺纹还必须与相关的压力和流体相适应。
In addition to providing mechanical or structural strength, the casing thread must be compatible with the pressures and fluids associated with the application.
本文对V形圆扣套管联接强度失效的主要形式，即套管联接螺纹滑扣(或滑脱)失效的机理进行了分析研究。
The main failure form of V-round-thread casing, that is, the mechanism of thread connection slipping off, is analyzed in this paper.
造成密封和滑脱失效的原因较为复杂，最重要的因素是螺纹粘扣降低了螺纹联接的强度和密封性能。
The reasons caused seal and slippage failure are complicated, the most important factor was the thread gluing reduced the intensity and the sealing property of the thread joint.
在大量有限元数值计算基础上，给出了包含接头螺纹结构参数及裂纹形态参数在内的应力强度因子的近似计算公式。
On the basis of a certain amount of calculations, the authors present an approximate formula, including the design parameters of the thread and the pattern data of the c…
一种高强度右旋螺纹钢锚杆，是由全螺纹钢筋和铸钢螺母构成。
The high-strength right-screwing threaded steel bolt is formed by full thread reinforcing bars and cast steel nuts.
三枚中空双头螺纹加压钉比三枚实心螺纹钉、三翼钉在抗压、抗弯、抗扭强度和刚度上占有一定的优势。
The 3 hollow double heads compression screw appear to offer distinct advantage over the 3 solid screw, trifin in the against pressure, against bending force, torsional strength and torsional rigidity.
中等强度螺纹阻力胶，使用于各种刹车线及印章，高抗震。能迅速对大多数金属固化，中等强度，可拆卸。
Seals and blocks all kinds of bolt connections. High resistance against vibrations, polymerises very fast on a high variety of iron metals. Middle to de-install.
采用螺纹连接和卡口连接技术，具有高可靠性，承载高电流，具有高强度耐用的特点，能在严酷的环境中使用。
Thread coupling and bayonet coupling connect technique, known for their supreme reliability, high power carrying capacity, inherent ruggedness and capacity to withstand extreme harsh environment.
采用螺纹连接和卡口连接技术，具有高可靠性，承载高电流，具有高强度耐用的特点，能在严酷的环境中使用。
Thread coupling and bayonet coupling connect technique, known for their supreme reliability, high power carrying capacity, inherent ruggedness and capacity to withstand extreme harsh environment.
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