Design And Reliability Analysis Of The Pressure Meter

The low permeability reservoir is widely distributed in the basin. Whether the exploratory of low permeability oil economic and effective or not related to the sustainable development of China’s oil industry. In order to explore low permeability oil field, one of the most commonly used method is fracturing. Electronic pressure meter is an essential instrument for collection fracturing data. It directly related to the evaluation of fracturing, as well as the calculation of oil recovery.The paper firstly summarize the development of pressure meter at home and abroad. Then in accordance with the problems among them, designed outer sleave for electronic pressure meter. And theoretical mechanics analysis and finite element analysis of outer sleave, it proves the outer sleave meet the requirements under external pressure of150MPa. At the same time, researching the trend of von-Mises Stress and buckling stress variation with internal diameter and external diameter. get related rules. The use of Visual Basic6.0creates "size optimization software". The "size optimization software" helps to optimize the outer cylinder size, select material and reduce the computational.Secondly, analysis of the pressure meter electronic part, and establish fault tree model of pressure meter electronic part based on composition of the electronic part. Then calculated the failure rate of the base events, it lays the foundation for reliability simulation of electronic part. In this paper, digital simulated of pressure meter electronic part combined with Monte Carlo method in the fault tree model. To determine the reliability parameters of the system (system reliability, system failure rate, system failure probability density distribution, and system mean time between failures). Then analysis of the simulation results, obtain the importance of each failure mode and variation of the reliability indicators. On this basis, put forward some suggestions to improve reliability of electronic pressure meter..Finally, work out reliability simulation software by MATLAB. By operating the interactive interface, the user can get the reliability correlation curve. In addition, users can enter each component failure rate manually according to the field data. It helps to corrects the simulation curve and improve the simulation accuracy.