一种仅副台肩的新型钻井工具接头的研制与应用  

Development and application of drilling tool joint with only secondary shoulder

作　　者：胡中志[1,2] 练章华 朱宽亮[2] 牟凤英 张颖 冯京海[2] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]中石油冀东油田分公司,唐山063004 [3]中石油塔里木油田公司质量检测中心,库尔勒841000

出　　处：《应用力学学报》2018年第1期166-171,共6页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金项目"极端条件下气井油套管端力学行为及其螺纹密封机理研究"(51574198);国家重大专项(2011ZX05050-01-3)

摘　　要：针对钻具API接头和双台肩接头的外台肩外径较大,导致钻具与井眼环形空间变小,严重限制钻井专用工具和仪器开发的问题,研制了一种仅副台肩的51/2"FH新型钻具接头。该接头通过取消外台肩结构,减小接头对接部分外径,可以为专用工具和仪器的设计预留空间。基于弹塑性有限元分析和实验测试结果表明:该仅副台肩的新型钻井工具接头设计是可行和可靠的,其静态抗拉强度大于450t,抗扭强度大于60k N·m。另外,本文还给出了该接头推荐工作扭矩和极限工作扭矩。以该接头为基础研制的防磨减扭工具现场应用结果表明:该仅副台肩接头单套工具最长入井时间超过1000h,纯钻时间达到700h以上,工作最大拉力达到220t,最高扭矩45k N·m,其安全性和防磨减扭性能够满足深井、大位移井高扭矩、大摩阻工况对钻井工具高强度的要求。As for the API and double shoulder tool joint, its outer diameter of external shoulder is very big, leading to a small annular space between drill tools and wellbore, which obstacles the development of special drilling tools and device. In this paper, a new 51/2" FH type of drilling tool joint with only secondary shoulder was proposed, removing the external shoulder structure, reducing the outer diameter at the position of butt joint, leaving more space for drilling tools and device in design. Based on the results of elastic-plastic finite element analysis and experiment test, the proposed drilling tool joint with only secondary shoulder is reliable and feasible. The new joint's static tensile strength is more than 450 t, and torsional strength is more than 60 k N·m. What's more, the recommended operating torque and limited operating torque are also obtained. At last, the wear-resisting and twist-reducing tool, with the new type of tool joint, is developed. The field applications show that service time of the proposed drilling tools is more than 1000 hours, and its drilling time is more than 700 hours. Furthermore, the maximum working tension is up to 220 t, and the maximum torque is also up to 45 N·m. Therefore, its properties of wear-resisting and twist-reducing can meet the requirements of deep well or extended reach well, which requires high strength drill tools in the high torque and friction drilling condition.

关 键 词：仅副台肩 钻具接头 有限元分析 性能测试 现场应用 

分 类 号：TE921.2[石油与天然气工程—石油机械设备]