新型卡瓦式套管头的研制与工业试验

THE DEVELOPMENT OF NEW TYPE SLIP CASING HEAD AND APPLICATION

从套管柱受力的合理性，防止硫化氢对套管头联接部位的氢脆断裂，以及影响密封性能的有关因素分析了目前国内大量使用的环形钢板—双公短节简易套管头存在的固有缺陷，指出这种类型的套管头不适宜在高压油、气井使用。本文介绍了长庆石油勘探局研制成功的新型卡瓦式套管头的结构原理、理论分析、室内台架试验、应力测试及在陕北气区工业试验的情况，认为新型卡瓦式套管头是按照中国石油工业的国情设计的，它具有结构简单、受力合理、构思新颖、安装简捷等优点，是一种十分有前途的新型套管头。

In according to reasonable characters of the forces on casing strings, preventing from the hydrogenfracture of hydrogen sulfide on the joint of casing head and the factors of affecting sealing characteristics,it is analyzed the existing problems of tube support ring-simple casing head of double pin nipple joint which is not fitted for using in the high pressure oil and gu wells. In this paper the new type slip casing head made by Changqing Exploring Bureau, including its principle of structure, theoretical analyzing stress checking bench-shelf testing and the case history application are introduced. It is shown the new type slip casing head have simple and reasonable structure