API螺纹与特殊螺纹连接特点及国内外特殊螺纹的介绍

API 螺纹与特别螺纹连接特点与国外特别螺纹介绍（石油机械##公司广汉钻采设备厂 广汉 618300）摘要：API 螺纹在油套管市场上扮演举足轻重的作用。但随着各种特别螺纹在油气田高温、高压井不断涌现，证明其已经很好地弥补 API 螺纹的设计缺陷。因国几乎没有对特别螺纹产生相应的标准与对比其特点，笔者现将 API 螺纹与特别螺纹进行比较：API 螺纹具有加工容易、经济适应、可重复上扣等优点，但抗拉强度差、且不具备气密封特点。特别螺纹具有良好的气密封性能、较高的抗拉强度与可控制上扣扭矩等优点，但价格昂贵、且只允许一定的上扣次数。最后，笔者提出了几点看法。关键词： API 螺纹； 特别螺纹； 对比； 国外The API threadand specialthreadedconnectioncharacteristicsandthedomestic and foreignspecialthread introduced(Guanghan drilling equipment factory of Baoji Petroleum Machinery Co., Ltd.，Guanghan 618300)Abstract：API thread to play a pivotal role in the oil casing market. However, with a variety of special thread emerging in the oil and gas fields of high temperature, high pressure wells, prove that it has to make up the the API thread of design defects. Almost no domestic special thread standard and comparing its characteristics, I will now compare the API thread and special thread: API thread with easy processing, economic adaptation, can be repeated on the buckle advantages, but the tensile strength and does not have the characteristics of the gas seal. Special thread has good gas sealing performance, high tensile strength and can control up torque, but the price is expensive, and only allows a certain number on the buckle. Finally, The authors put forward a few points.Keywords： API thread；special thread；contrast；at home and abroad一 概述油套管是油气钻采过程中不可或缺的专用管材,其质量好坏直接影响到钻采作业的成败和油气井的寿命。而螺纹接头同油套管柱一起在油气井中长期承受拉伸、压缩、弯曲、压、外压与温度等产生的复合应力的考验,油套管中最薄弱...