深井及超深井套管选用探讨

Selection of Casing Pipes for Deep Wells and Ultra-deep Wells

深井及超深井中地质条件复杂,套管不仅承受温度及压力载荷,还要承受腐蚀介质的作用,因此进行套管柱设计时需要考虑套管和接箍的强度,充分利用特殊螺纹的高密封性,高连接强度及抗粘扣性能,并且考虑温度及腐蚀介质对套管柱性能的影响,全面评价套管性能,科学合理进行套管柱设计。

Due to the complexity of geological conditions in deep wells and ultra-deep wells, casing not only is enduring the temperature and pressure load, but also is bearing the action of corrosive medium. So in design of casing string, the casing and coupling strength need be considered; the high sealing performance, high connection strength and anti-thread gluing capability of premium thread should be made full use of; and the influence of temperature and corrosion medium should also be considered. Moreover, it is necessary to comprehensively evaluate the performance of casing and design casing string scientifically and reasonably.