unconsolidated

A series of defects exist in the cup circulation pack sand control tools and slip filling sand control tools currently used in Binnan unconsolidated sandstone reservoir.

针对滨南采油厂疏松砂岩出砂油藏所用皮碗式循环充填防砂工具和卡瓦式充填防砂工具存在的一系列弊端，研制应用了新型无卡瓦胶筒式循环充填工具。

Methods of tunnel excavation in unconsolidated formations and the collapse zone treatment are intro-duced according to the formation properties fo exit section of Yangzong No.

针对阳宗海一号隧道出口段的地层特点，介绍了在松散土体地层中遂道施工方法的选择及在施工中出现坍塌的处理方法。