Located in Xi’an- a famous historical city and founded in 2000, is a hi-tech company specializing in oil development services. Its business scope covers research & development, production and sales of various oilfield chemicals and environmental protection equipment. 　 Its main oilfield chemicals include drilling fluid additives, cement paste additives, oilfield production additives, oil & gas gathering and transportation additives, water treatment additives, etc. Green owns a R&D laboratory wi...