gravity drainage

基本解释

The outdoor vacuum drainage system can resolve the problem of gravity drainage system in some special areas.
室外真空排水系统在特殊地区的运用能从环保、投资方面解决传统重力排水系统的难题。
Based on the option, the steam_assisted gravity drainage and enhanced steam_assisted gravity drainage can be considered effective exploitation methods for super heavy oil reservoir.
优选结果认为：蒸汽辅助重力泄油及强化蒸汽辅助重力泄油是开采超常规稠油油藏较为有效的开发方式；
Compared with gravity drainage system, it has the advantages of small pipe diameter and installing space, non-sloped suspended pipe, less sewage connecting and underground pipes and etc.
与重力排水系统相比，具有管径小、管道安装要求空间小、悬吊管无坡度、下水道连接管和埋地管少等优点。

Edwards aims to use a newer method called steam-assisted gravity drainage.
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Steam Assisted Gravity Drainage (SAGD) pumps steam into the ground to liquefy the bitumen and stiff crude oil, making it thin enough to be pulled out of the ground.
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