Research On Mud Electrical Parameters Measurement Circuit System

Energy is key factor which determined the economy develop continually. In all existing energies, oil is a vital strategic resources, and influent the stable of a country, sustainable development. Owing to the late start of China ’s development of advanced logging instrument and the advanced western countries keep it secret, technological blockade, so, it is urgent to develop our own advanced logging instrument.Research on mud electrical parameters measurement circuit system is drafted from the above mentioned background. In order to get the surrounded information of drill pipe and overcome the difficulty of measuring mud electrical parameters using direct method, we use a indirect approach, which put the mud into a ring vessel, to solve this proble m. We can measure the complex impedance of the ring vessel and deduce the value of mud electrical parameters.Because the measurement instrument need working below thousands of meters, the temperature which the instrument work maybe excess the max temperature of chip. What is more, the strong interference from the high power motor, the electromagnetic interference signal which transmitted by other ’s devices assembled in drill may make the accuracy worse. In order to solve the problem, we select chip which can bear higher temperatures, design self-calibration circuit, use design techniques of high-speed printed circuit board and so on. The practices improved that it is very useful in improving the accuracy and satisfied with the requires of project.