钻杆

3The microcosmic analysis of drill pipes: Through comparison metallographic analysis of drill pipes, this paper finds out the ultimate reason which its" performance are difference, then uses SEM to analyze drill pipes and studies crack and acanthopore, measures local chemistry component and the influence that Shot-peened to performance of drill pipes in it"s inside thickening transitional region, measures microcosmic rigidity of drill pipes.

本文的创新点：(1)提出了钻杆失效的过程和概念模型，即内表面缺陷-解理断裂-裂纹疲劳扩展-过载断裂，为解决钻杆失效分析中存在的困惑(各项基本检测参数基本合格，刺穿和断裂仍有发生)提出了分析方法和手段。

The fracture analysis includes the macro-fractography and micro-fractography, the experimental analysis of the chemical components, the mechanical properties, and the metallography of drill pipes, and the stress conditions analysis of drill pipes in air drilling.

失效分析内容主要包括断口宏观分析和微观分析，钻杆材料化学成分、力学性能和金相组织试验分析，钻杆在空气钻井过程中受力条件分析等。

Make a mark for sticking point on the drill pipe.

在钻杆上作卡点记号。在钻杆上作卡点记号了吗？

The results showed that the wear-resistant belt in drill joint was actually an isolation belt, which could protect the drill joint and sleeve from serious abrasion, and the optimization and improvement of its performance was the technical key to preventing sleeve from serious abrasion.

结果表明，钻杆接头耐磨带实质上是一个隔离带，用以保护钻杆接头和套管免遭强烈磨损，接头耐磨带性能的优化与改善是防止套管强烈磨损的关键技术措施。

In view of the improper matching of the strength-toughness for domestic petroleum drill pipe sub,the influence of the chemical compositions and metallurgical quality of 37CrMoE steel used for drill pipe sub on its mechanical properties,as well as the effect of the metallurgical quality on the hardenability,were analyzed.

针对国产石油钻杆接头存在强韧性配合不良的问题，试验研究了钻杆接头用37CrMoE钢的化学成分和冶金质量对其力学性能的影响，以及冶金质量对淬透性的影响。

Mechanical properties of the friction weld drill rod, which is guaranteed with the rational welding technology and the rational heat treatment technology, must meet the requirements of profession standards.

摩擦焊接钻杆要求其机械性能达到行业标准要求，钻杆焊后的机械性能是由合理的焊接工艺和正确的热处理工艺保证的。

The mechanical properties and metallographic structures of the friction welded drill rod and the hot upset forged drill rod pipe are compared.

本文叙述了这种钻杆的焊接性，并与采用热镦粗工艺生产的钻杆管体金相组织和机械性能进行了对比。

Change of one section of Kelly bar should get suggestions of manufacturer; part 2 is locknut, normal nut should not be changed for it.

更换其中一节钻杆要征求钻杆生产厂家建议；件2为防松螺母，不要换为普通螺母。

In the light of the successively occurred piercing and longitudinal cracking on the drill pipe box es,the fractures are analyzed by X-ray energy spectrum and electronic microscope,and the mechanical properties of the material are tested.

针对某油田一批进口钻杆连续发生17根钻杆内螺纹接头纵向开裂和刺穿事故，对断口进行X射线能谱、电镜和金相分析，并采样进行机械性能试验分析，认为材料不是导致接头断裂的主要原因。

Due to the increasing number of deep wells and directional wells being drilled,longitudinal fracture occurred on the box-ended drill pipe tool joint is often reported.

对钻杆接头材料进行SSC试验，发现如果将材料硬度限制在HB310以内，将明显减少钻杆内螺纹接头纵向应力腐蚀开裂失效。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。