An anti loosening high airtight threaded casing connection structure, including plant oil casing, end end sleeve and collar, three are connected together through screw, the end collar and sleeve are fixedly connected, the other end of the coupling through constant torque screwed into the internal thread mode coupling in the butt joint the end is formed at both ends of casing pressure interference sealing butt joint structure; or by coupling the sealing step, or to form a seal butt joint structure with pressure interference through the intermediate sleeve; connection strength between casing and oil factory side end of the sleeve and coupling by a threaded connection to ensure that the sealing performance between the three sealing joint the structure is ensured by end interference. Ensure the end face interference seal by using torque wrench. The utility model not only ensures the connection strength between the oil field end pipe sleeve and the factory end bushing and the coupling, but also ensures the high sealing end face of the oil field end sleeve and the factory end sleeve to be butted and butted.
【技术实现步骤摘要】
【技术保护点】
１．一种防松动高气密螺纹套管连接结构，包括工厂端套管（１）、油田端套管（２）和接箍（３），在工厂端套管（１）和油田端套管（２）设有外螺纹，在接箍（３）两端都设有内螺纹，工厂端套管（１）和油田端套管（２）均通过外螺纹与接箍（３）旋接成一体，其特征是：接箍（３）与工厂端套管（１）或油田端套管（２）牢固连接，工厂端套管（１）和油田端套管（２）的外螺纹通过定扭矩方式旋接在接箍（３）两端的内螺纹中，且工厂端套管的对接端面（１１）和油田端套管的对接端面（２１）之间为带压过盈密封对接结构；或者工厂端套管的对接端面（１１）通过接箍（３）的密封台阶（３１）和油田端套管的对接端面（２１）之间形成带压过盈密封对接结构；或者工厂端套管的对接端面（１１）通过中间套（４）和油田端套管的对接端面（２１）之间形成带压过盈密封对接结构。
【技术特征摘要】
【专利技术属性】
技术研发人员：李珺，高建昌，马叶忠，
申请(专利权)人：江苏常宝钢管股份有限公司，
类型：实用新型
国别省市：32
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。