Design And Research Of Pipeline Intelligent Plug

With the growth of China’s oil and gas pipelines and the growth of pipelines,it is often necessary to carry out maintenance and repair operations such as valve replacement,additional branch roads,pipeline modification and pipe section replacement to ensure safe and stable transportation.Therefore,it has been extremely important to study a pipe blocking device capable of quickly repairing the plugging.Pipeline high-pressure intelligent plugging technology is a new plugging technology developed abroad in the 1990 s.It has the characteristics of remote control,no drawstring and fixed point plugging.It can enter the pipeline without opening,thus minimizing damage to the pipeline.In this paper,the development of plugging equipment at home and abroad are introduced.The existing shortcomings of various types of pipeline plugging equipment are analyzed.So pipeline intelligent plug based on pipeline intelligent plugging technology are introduced.In this paper,the overall structure and implementation principle of the pipeline intelligent plug are designed and studied.According to the design requirements and the specific situation of the φ711 pipeline in a certain oil delivery station,an overall scheme that can achieve double-end plugging operation is designed.The two plugging heads are simultaneously sent through the upstream serving end and can be separated when reaching the designated position,and the anchoring action and the sealing action are completed according to the instructions,thereby respectively blocking the pressures upstream and downstream of the pipeline.Aiming at the proposed double-end plugging operation scheme,the concrete structure of the pipeline intelligent plug was designed.The Solid Works three-dimensional model of the pipeline intelligent plug was established,and the structural dimensions and safety strength of the key components were designed and checked.At the same time,the corresponding hydraulic circuit was designed for the designed hydraulic power system and the whole working process was analyzed by AMESim software.Finally,the finite element analysis software ABAQUS was used to study the sealing performance of the sealing unit,and the reliability of the designed rubber cylinder structure and the combination of the rubber cylinders was determined;The finite element analysis software ANSYS was used to analyze the contact between the slip and the inner wall of the pipeline to determine the reliability of the anchoring performance.The FLUENT software was used to analyze the flow field state of the anchor timing,and the influence of different flow rates on its anchoring performance was studied.