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接头是油套管产品的重要组成部分之一,也是石油、天然气开采中油套管柱中最薄弱的环节。接头的实体性能、使用性能和经济性是油套管主要指标。介绍了国内外油套管接头的发展:从最初API圆螺纹、长圆螺纹、偏梯形螺纹接头到各个厂家推出的具有各项突出性能的特殊螺纹接头,再回归到具有实用性的经济型油套管接头。介绍了具备密封完整性、结构完整性和重复上卸扣完整性的经济型气密封油套管接头的开发与进展。
Joints are one of the most important components of oil casing products and also the weakest link in casing oil and gas exploration. The physical properties of joints, performance and economy are the main indicators of oil casing. The development of oil casing fittings at home and abroad is introduced. From the initial API round thread, long round thread and partial trapezoidal thread joint to the special screw joint which has various outstanding performances introduced by various manufacturers, it is returned to the economical oil sleeve Pipe fittings. The development and progress of economical gas seal oil bushings with seal integrity, structural integrity and repeat unloading integrity are introduced.