The Research Of Plunger Pump Outlet Pipeline Vibration

The plunger pump is an essential ground equipment for water injection process in the oilfield.The vibration of plunger pumps directly influences the oil production and quality,affects the health of oilfield stuff,and leads to leakage of the pipeline,collapse even worse,creating huge operating risks and massive financial loss.Therefore,there is a practical engineering significance in studying the vibration problem of plunger pumps.There are obvious vibration problems on the certain outlet pipe in the Changqing Oilfield of China National Petroleum Corporation.This thesis focuses mainly on the vibration problems and their reduction methods.At the beginning,the research aims at the vibration mechanism of pipeline.On the theory basis that the pressure pulsation is the main cause of vibration,this thesis discusses the influence by factors on parameters like unbalanced excitation force,which provides theoretical basis for the pipeline structure improvement.The detecting system is built and collects vibration signals of the pipeline.Based on the research of the finite element analysis method of the pipeline structure mode,the natural vibration modes of the pipeline and improved spatial structures are analyzed in ABAQUS software,enriching the reduction methods.At the same time,the stress analysis of the original and improved pipeline is carried out in CAESAR II software.The additional analysis offers the location of maximum stress and verifies the effectiveness of the improvement.Based on the above research,the thesis expounds the general strategies used for vibration reduction and proposes several vibration reduction methods,which obtain variety of difficulties in construction.