Sitan Company was established in 1991, and it is located in Xi'an High-tech Zone, the company’s plant area is 15,000 square meters and has more than 540 employees, among them, master degree or above are more than 190 persons, bachelor degree or above are more than 80%, and more than 200 persons are engaged in technology development. The company registered capital is 17,350,000 USD, total assets are 100,000,000 USD, net assets are 80,000,000 USD, it shows a strong scientific research ability. Sitan has been listed on the new three board, the stock code is 832801. Xi’an Sitan has 16 branch offices in China, covering almost every oilfield in the business of marketing, maintenance, technical support and provide cased hole logging service. And we have 8 international offices in Oman, Malaysia, Indonesia, the United States, Kazakhstan, Azerbaijan and Russia, total of more than 80 professional after sales service engineers work in local and foreign oilfields for long time to provide best service for our users. Sitan has more than 20 years R&D experiences on well logging tools, surface equipment. The main products of Sitan is water injector tools, oil and gas recovery tools, dynamic monitoring tools, fracturing and perforation tools, exploration logging tools, LWD and MWD tools, surface tools and geophysical prospecting tools. Our tools nearly covers every major of oil field and been widely used in the area of oil and gas recovery, water injector, dynamic monitoring, surface equipment, digital oil&gas field and so on. Now, Sitan has already became the most important manufacture of China in the field of logging, well testing, coalbed recovery and other professional tools.