Oil Base Drilling Fluid

Oil-based drilling fluid has such remarkable advantages as strong inhibitive ability, high temperature tolerance, good pollutant resistance, oil gas reservoir protection, good lubricating property, strong corrosion resistance, etc., has experienced the development history from crude oil, water-free oil base (diesel), water in oil (diesel), low colloid water in oil, low toxicity water in oil and water-free oil base (white oil), and presently serves as a primary means in drilling deep well, highly-deviated well, horizontal well and various complex strata. Since 1980s, oil-based mud is successively used at oilfields of Huabei, Xinjiang, Zhongyuan, Daqing, etc. Oil-based mud has a rather limited application in China due to its high cost, but many foreign countries have always been using oil-ba