| 1. | Threads on rotary shouldered connections for petroleum industry
石油钻杆接头螺纹 |
| 2. | Petroleum equipment - thread gages for rotary shouldered connections
石油钻杆接头螺纹量规 |
| 3. | Optimization of the joint - thread of diamond wire - line coring drill pipe
金刚石绳索取心钻杆接头螺纹的优化研究 |
| 4. | Parametric design of threads on rotary shouldered connections for petroleum industry
石油钻杆接头螺纹参数化设计 |
| 5. | The results have given the reason of tool joint with one side hardbanding and double sides hardbanding could reduce casing wear , and the theoretical foundation and technical guidelines to technology of tool joint hardbanding
分析结果很好地解释钻杆接头单、双边敷焊硬化带降低套管磨损的原理，为钻杆接头敷焊硬化带工艺提供了理论基础和技术依据。 |
| 6. | The highlights of this paper include : hoop toughness criterion for longitudinal heat checking of tool joint was introduced firstly ; failure criterion for crescent - shaped wear casing was established according to the results of full - scale collapse tests ; new - typed alloy for hardbanding of tool joint was developed , its property has showed good performance in the tests
本文的主要创新点在于：以现场失效案例分析为基础，提出了钻杆接头纵向热裂的横向韧性判据；通过对已磨损套管的实物挤毁试验研究，确定了不均匀磨损套管的挤毁失效准则；设计出了具有独立知识产权的钻杆接头硬化带用新型耐磨减摩合金的成分，经实验室试验表明其性能可以达到或超过国外同类产品。 |
| 7. | According to the researches on working principle of wear - resistant alloy , the ideas on selecting the new - typed wear - resistant alloy were put forward , which are " equilibrium wear design " and " stability " concept . three kinds of new wear - resistant alloy that can be used for hardbanding on tool joint were developed , and wear experiments have showed that its property is as good as or better than that of abroad
对耐磨减摩合金的工作原理进行了研究，提出了新型耐磨减摩合金的筛选要以“平衡磨损设计”概念和“稳定性”原则为依据，并设计出3种钻杆接头硬化带用新型耐磨减摩合金，实验室磨损试验表明其性能可以达到或超过国外同类产品。 |
| 8. | Especially for the longitudinal heat checking of tool joint , the hoop toughness criterion of tool joint material was put forward to prevent the heat checking . based on analysis for field failure cases , minimal hoop impact work by means of mechanical calculation has been obtained , which can be used to modify the relevant contents of api rp7g
特别针对钻杆接头纵向热裂问题，提出了控制接头材料的横向韧性判据，并以现场失效案例分析为基础，经力学计算初步确定了最低横向冲击功要求，可用于完善修订apirp7g推荐做法的有关内容。 |
| 9. | Thereby , this paper has carried through an in - depth study on wear mechanism between tool joint of drill pipe and casing , problems caused by wear and measures to deal with wear based on researches at home and abroad . the research contents include : in order to reveal mechanism of wear occurred between tool joint and casing , distribution of the contact pressure between the tool joint and casing for different loads was obtained with finite element method . furthermore , the mathematical model of maximum contact pressure and the wear depth on casing was established
所以，本文在国内外研究的基础上，对钻杆与套管摩擦磨损的机理、引发的系列问题及其预防措施进行了深入研究，研究内容主要包括：为探讨钻杆接头与套管摩擦磨损的机理，采用有限元法研究了不同载荷下接头与套管之间接触压力的分布规律，并建立了最大接触压力与磨损量的数学模型。 |
