Study On The Parameter Configuration Method Of Asymmetric Counter-Rotating Twin Screw Pump Oil Recovery System

Oil is known as "industrial blood",to maintain national security,social stability and promote social and economic development plays a vital role,because of this,it is necessary to vigorously develop oil recovery technology,at present,the widespread use of artificial lifting oil recovery methods,which is the most rapid development of the screw pump oil recovery technology,with low energy consumption,small size and the absence of rod and tube bias grinding and a series of advantages,Small size and the absence of rod and tube bias grinding and a series of advantages,but at the same time there are also some shortcomings,the axial force of the screw pump rotor is mainly borne by the eccentric coupling in the thrust bearing,once the bearing failure,will inevitably lead to a reduction in the life of the entire oil recovery system,at present,some scholars proposed to improve the bearing structure and materials to improve the bearing capacity,but the effect is not very satisfactory.To this end,the thesis introduces the TRIZ theory in the material-field analysis method,according to the characteristics of the screw pump axial force load and the relationship between the thrust bearing,combined with the entire screw pump oil recovery system,the establishment of the corresponding screw pump oil recovery system of the material-field analysis model,and finally proposed the screw pump axial force "balance offset" idea of the oil recovery system The structure innovation,the development of parallel configuration twin-screw pump oil recovery system,aimed at improving the service life of the oil recovery system and the depth of diving,if the parallel configuration twin-screw pump oil recovery system parameters are properly matched,will greatly improve the production and economic efficiency of the oil recovery system.Therefore,this thesis is based on the concept of "equal life" to carry out research on the parameter configuration of asymmetric counter-rotating twin-screw pump oil recovery system,the so-called "equal life" is to make the fatigue life of the thrust bearing and universal coupling tend to equal,to give the two screw pumps between The axial force ratio relationship between the two screw pumps,the summary of the lower screw pump model selection range route,selected a number of screw pump matching program.Then,the study of the configuration of the geometric parameters of the progressive cavity pump,for different displacements of the twin-screw pump oil recovery system,to determine the configuration of the geometric parameters of the multiple groups of progressive cavity pumps,and further analysis of the relationship between the life of the transmission parts and the system displacement.Finally,the finite element method is used to analyze the head of the twin-screw pump oil recovery system,aiming to prove that the head of the twin-screw pump oil recovery system can meet the differential pressure requirement at the pump end.When the thrust bearing type and universal coupling type is certain,the ratio of axial force between the lower screw pump and the upper screw pump is 1.41:1 is appropriate;different screw pump matching scheme,the fatigue life of the twin-screw pump oil recovery system is different;under the premise of meeting the rubber life,the twin-screw pump oil recovery system matches the smaller screw pump than the larger screw pump with a longer service life;compared with the same displacement single screw pump Compared with the same displacement single screw pump oil recovery system,twin screw pump oil recovery system can improve the service life and diving depth;compared with the same life single screw pump oil recovery system,twin screw pump oil recovery system can improve the displacement.Through the structural innovation of the oil recovery system and the concept of "equal life",we have successfully solved the problems of short life,small depth of dive and small displacement of the screw pump oil recovery system,breaking the limitation of well size and depth of dive,achieving a relatively large innovative breakthrough and promoting the promotion and application of screw pump oil recovery technology.