Mechanical Oil Well Tube Rod Eccentric Wear Mechanism And The Prevention And Control Technology Research

It is an urgent problem to solve the problem of oil field development.This topic summarizes the reasons and eccentric wear oil well pipe rod eccentric wear well control method of the status quo at home and abroad,this paper analyses the characters of the eccentric wear well after water cut rising and the stress of downhole rod string,set up the improved centering ring and big port triple eccentric wear of pump control method.It is reasonable to prove that the method is reasonable.With typical characteristics of eccentric wear of daqing chaoyang trench oil field as the background,analyzing the distribution,oil production in oil well block,the relation between the viscosity of crude oil and oil Wells produce eccentric wear,determined the cause of the oil well pipe rod eccentric wear of water cut rise,and use the site statistics of the argument is verified.Oil Wells of eccentric wear rod mechanical model is established,and the rod string stress analysis calculation,it is concluded that partial neutral point theory calculation formula of grinding well calculated to governance the eccentric wear of eccentric wear well,through the field test shows the neutral point correction coefficient theory formula,puts forward the reasonable basis for classified management of eccentric wear well.Design a new type centering ring,analyzes the existing in the shortage of the centering ring,centering ring was developed wear-resisting and locking force testing device,through the force analysis and determine the installation position of the centering ring spacing,after field application test,the improved centering ring can be separated by the pipe rod eccentric wear of the governance method applied in oil field.Big port triple pump is developed,reduce the downward drag rod string,increase the clearance between plunger and pump,expanded the swimming,and fixed valve circulation way,using polymer viscosity resistance and downward relationship of indoor experiment,verified the flow pump as a mechanical failure of eccentric wear governance approach is feasible.