Which companies in Sichuan Province can handle shale fragments and oil-based mud?

Which companies in Sichuan can handle shale cuttings and oil-based mud: Sichuan University, Sichuan Neijiang Ruifeng Environmental Protection Technology Co., Ltd., China Great Wall Drilling and Qing Chuan Drilling also do the same.

Through Tarim Oilfield, Southwest Oil and Gas Field and Changning-Weiyuan Shale Gas Field.

Oil-based mud:

Also known as oil-based drilling fluid, its basic components are oil, water, organic clay and oil-soluble chemical treatment agent. Oil-based mud is resistant to high temperature, salt and calcium corrosion, which is beneficial to wellbore stability, good lubricity and little damage to oil and gas reservoirs, and is widely used in various drilling platforms. The base oil diesel in oil-based mud will produce aromatic hydrocarbons with toxins, and the more aromatic hydrocarbons it contains, the greater the toxicity.

20 1 1 The oil spill accident in Penglai Oilfield, Bohai Sea, China mainly leaked oil-based mud.