Abstract:

This paper presents an apparatus for measuring the liquid flow rate and the diameter of the wellbore. It can make remote measurements and withstand temperature as high as 1800 C. In this paper are described the working principles, specific characteristics and the results got with it. Besides, we introduce a method of determining the oil and water content with it and the way for us to solve such technical problems, as high temperature resistant property and restricted size. we have developed such a new technology that the thansistor circuits consisting of common discrete components can withstand temperatures as high as 200℃. and be used to make various nigh temperature circuits.