Reliability Analysis Of Economic Life Sucker

Rod is working well in the important parts. It is responsible for pumping the power passed to pump. Moreover, Sucker rod pumping equipment life for maximum depth and displacement pumps have an important impact. In the course of their work, Rod stress state is more complex, and in direct contact with a variety of corrosive media, subject to strong corrosion. Accordingly, fatigue fracture and corrosion fatigue fracture is the failure of the two main forms of the sucker rod. Sucker event of a failure, it will affect oil production, increased workover costs, thus increasing the cost of crude oil. Therefore, damage investigation and analysis of the status bar system after pumping wells. Depth study of the reliability of the fatigue life of the rod string of major significance.First, the survey of existing wells fault. The establishment of a system fault tree rod. From the qualitative and quantitative two aspects, research and analysis, find the sucker rod system needs to improve links; Secondly, for these links to be improved, given the stress intensity factor be calculated by the method, and explore the general rule system material fatigue crack growth exhibition. So that, in theory, easy to calculate the remaining life of the sucker rod; Again, research sucker rod axial load distribution, make full use of finite element software, Studies have cracks and corrosion, etc. Sucker rod system, Seek the maximum count, etc, and stress concentration factor effect force; Consider stress calculation errors as well as the post of the uncertainty of defect size, reliability prediction model was constructed overall fatigue life of the post; Finally, improved sucker rod life prediction model, establishment of reliability evaluation method economic life of the rod. Analyze the effect of cracks, age and other factors on the spot pits sucker system reliability.This article delve into the system and get an assessment of the sucker rod fatigue life and economic life of system reliability and effective method. This makes in-depth study of optimization methods and sucker rod reliability evaluation techniques have a solid theoretical foundation. Delve into the implementation of a system failure improvement theoretical knowledge, it helps reduce system operating costs, but also help to increase the economic benefits of the field.