RT-Ⅰ型热采套管头的研制与应用

针对稠油热采井预应力固井中存在的问题，研制了一种适用于稠油热采井预应力固井的新型套管头。该套管头结构设计合理、操作简便，首次在国内实现了热采井带防喷器进行有控条件下的预应力固井。使用表明，该套管头能确保预应力固井工艺的实施效果和有效控制井下套管受热伸长，保证了油田对安全生产的要求。文章着重介绍了新型套管头的结构、工作原理、套管悬挂载荷的计算、室内试验、推广使用及效果分析。

Development and application of RT-Ⅰtype casing head

Through several year's research,a new type of casing head in view of the problems encountered in preceding stress cementing in thermal production well. By using this type of casing head which has rational structure and is convenient to operate, for the first time in domestic oil field preceding stress cementing with the BOP setting on well head can be performed. The wide application of this casing head on site reveals that it can meet the production's requirements by effectively controlling the casing elongation as the result of heating and thus ensuring the preceding stress cementing operation. This paper mainly presents the structure and working principal of this new type of casing head, calculation of casing suspending load, workshop experiment and application.