Hydraulic fracturing and the chemicals used | Shell
2020-2-13 · There are various drilling fluid systems used in the petroleum industry including freshwater, saltwater, oil, synthetic-based and pneumatic (e.g. air, foam) fluid systems (West et al., 2006). The term 'mud' is frequently used interchangeably with the term 'fluid'. The term 'mud' is used because of the thick consistency of the fluid
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