【摘要】 随着油井深度增加、环境不断恶化，按 API标准生产的螺纹接头又难以满足油井的需要，新开发的特殊螺纹接头应用范围不断扩大。介绍了国外开发的几种典型特殊螺纹接头及其设计特点。特殊螺纹接头的市场前景广阔，目前我国尚无批量生产的能力，应加大特殊螺纹接头的开发力度，既可满足国内需求，又可参与国际市场竞争。更多还原

【Abstract】 ： Due to increasing oil well depths as required,and hence worsening working conditions,standard A PI threaded joints can hardly meet the need for oil fields,whereas newlydeveloped premium threaded－ joints are being used more and more widely.Described here are several typical PJs developed overseas,including their design characteristics.Considering the great potential market of PJ,and the domestic industry’s failure to produce such product commercially,it is a must to speed up PJ development ,aiming at both local and world markets.更多还原