论文部分内容阅读
凿井作业的固定费用特别高,因此必须采取预防措施以避免凿井队的非生产停工时间。涌水或非固结地层有时迫使凿井工作停工,这是由于必须封堵或加固井壁所致。预注浆在很大程度上可以避免这种误工现象的发生。本文介绍如何在各种条件下进行预注浆的方法,并让人们注意可能遇到的一些问题。作者的结论是:预注浆作业的费用与凿井作业的总费用以及非生产停工时间的费用相比是不多的。
The fixing costs for drilling operations are particularly high, so precautions must be taken to avoid the non-production downtime of the drilling crew. Gushing or unconsolidated formations sometimes force the shaft to stop working due to the need to block or reinforce the shaft wall. Pre-grouting to a large extent to avoid the occurrence of this phenomenon of labor. This article describes how to pre-grout in a variety of conditions and draws attention to some of the issues that may be encountered. The authors conclude that the cost of pre-grouting operations is small compared to the total cost of drilling operations and the cost of non-production downtime.