A continuous supercritical fluid extraction system for the treatment of drilling waste

石油和天然气钻井涉及使用钻井液或泥浆，主要是为了润滑钻头，从钻井中取出岩石和岩石碎片，并将它们输送到地面。目前使用的钻井液有两种：水基钻井液和非水钻井液。非水钻井液主要由柴油、矿物油或合成油及添加剂组成，而水基钻井液主要由含有添加剂的盐水或淡水组成。非水钻井液通常比水基钻井液表现更好，特别是在加拿大遇到的具有挑战性的钻井环境中，尤其是在近海。然而，尽管非水流体具有优异的性能，但它们并不总是被使用，因为它们因含有石油而被认为不太环保。

Drilling for oil and gas involves the use of drilling fluids or muds, primarily to lubricate the drill bit and remove rock and rock fragments from the drilling well and transport them to the surface. There are two types of drilling fluids currently in use: water-based drilling fluids and non-aqueous drilling fluids. Non-aqueous drilling fluids are composed primarily of diesel oil, mineral oil or synthetic oil and additives while water-based fluids consist of a base of salt water or fresh water containing additives. Non-aqueous drilling fluids generally perform better than the water-based fluids, especially in the challenging drilling situations that are encountered in Canada, especially off-shore. However, despite their superior performance, non-aqueous fluids are not always used since they are considered less environmentally friendly due to the fact that they contain oil.