The description of this process can be traced back to 10 century at the earliest. 1684, the UK officially granted the patent for the extraction process for the first time. Mining industry and innovation became common in the19th century. After the industry shrank in the mid-20th century, it was found that the conventional oil reserves were very large, but at the beginning of the 20th century, high oil prices aroused new interest, accompanied by the development and testing of new technologies.
By 20 10, the main long-term mining industries are Estonia, Brazil and China. Its economic vitality usually requires a shortage of local crude oil. National energy security has also played a role in its development. Shale oil exploitation is very important for environmental management, such as waste treatment, large amount of water, sewage treatment and air pollution.