However, its function was often lost upon the serious circulationloss occurring to the formation with low pressure coefficient and relatively macro fractures.
但对地层压力系数低且裂缝较大的严重井漏往往失去作用。
2
The current classification schemes for circulationloss zone are hardly suitable for the complicated circulationloss cases which are influenced by many factors.
目前的漏失层分类方案很难适用于错综复杂多因素影响的孔漏情况。
3
Very severe problems during drilling were circulationloss and borehole collapse because of formation fracture growing, and drilling operation was very difficult.