Beijing Hailan Science & Technology Co., Ltd. was incorporated in 1995 This is a professional hi-tech enterprise engaged specially in research & development, production and sales of oil-drilling and logging instruments. Our main products are MWD System, YSS Series Electronic Single/Multi-shot Survey System, and YST Series Survey Steering Tool. Research and development members take one third of corporate personal. Our company owns eleven national patents of China for inclinometers. The company, which is past the quality certification of ISO9001, our products are widely applied in all the oilfields in China, and also widely applied in the sectors of mining, geological exploitation, and non-opening tunnel excavation, and so on.