油田开发实践表明,尽管套管本身强度研究不断深入,但套管损坏的速度却逐年增加。这就迫使人们对套管的荷载问题进行研究。以前,套管设计都是把管外泥浆柱的静液压力荷载作为计算依据,尚未考虑岩石压力的影响。对套管岩石压力荷载的研究始于二十世纪五十年代,主要是对套管损坏较严重的盐岩和泥岩压力的研究,其次研究的是地震和断层活动对套管损坏的影响等。现分别评述如下。 Oilfield development practice shows that despite the continuous study of the strength of the casing itself, but the casing damage rate has increased year by year. This forces people to study the load on the casing. In the past, the design of casing was based on the hydrostatic load of the mud column outside the tube as a basis for calculation, and no consideration was given to the effect of rock pressure. The study of casing rock pressure load began in the 1950s. It mainly studied the pressure of salt rock and mudstone with more serious casing damage, followed by the influence of earthquake and fault activity on casing damage. Now respectively comment as follows.