hi,

generally master of science course in usa is 2 years, the eligibility criteria for ms in petroleum engineering is , candidates must have bachelors degree in relevant engineering discipline like b.e / b.tech preferably in chemical engineering/ petroleum engineering. candidates have to appear in language proficiency exams like ielts/ toefel requires by the particular university. also candidates have letter of recommendation, statement of purpose, if there is any project work related with the petroleum engineering or have research papers on while perusing ug course has an added advantage.