A mathematical simulation model for the beam pumping well system was presented,including the mechanical model and the kinematic model of rod string,fluid column and of beam pumping unit as well as the motor behavior model.

In order to increase the effect of pumping well system, the paper discusses the analytical method of the system about single well system effect, electric machine's loading rate, pumping well's balance degree, submergence, dynamometer card and presents calculating formula of the effect of the pumping well system .

The traditional regression equation notable quality inspection(F inspection and related factor inspection)is analysed,and we have considered comprehensively existing transitional region from the notable to the non notable that is possessed of fuzzy indefinition. The notability is rationally defined by calculating the fuzzy believable degree of the equation. In this thesis,the new method is used for inspecting the regression result of the pumping well system officiency.

In order to increase the effect of pumping well system, the paper discusses the analytical method of the system about single well system effect, electric machine's loading rate, pumping well's balance degree, submergence, dynamometer card and presents calculating formula of the effect of the pumping well system .

Based on the working condition of the pumping well system, through the study on the production string of the oil well, a mechanical model for studying the vibration characteristics of tubing string has been established.

The traditional regression equation notable quality inspection(F inspection and related factor inspection)is analysed,and we have considered comprehensively existing transitional region from the notable to the non notable that is possessed of fuzzy indefinition. The notability is rationally defined by calculating the fuzzy believable degree of the equation.In this thesis,the new method is used for inspecting the regression result of the pumping well system officiency. The results show that the new method...

The traditional regression equation notable quality inspection(F inspection and related factor inspection)is analysed,and we have considered comprehensively existing transitional region from the notable to the non notable that is possessed of fuzzy indefinition. The notability is rationally defined by calculating the fuzzy believable degree of the equation.In this thesis,the new method is used for inspecting the regression result of the pumping well system officiency. The results show that the new method is persuasive and is of practial use.

A mathematical simulation model for the beam pumping well system was presented,including the mechanical model and the kinematic model of rod string,fluid column and of beam pumping unit as well as the motor behavior model.The dynamics of the beam pumping well system can be described in a more realistic way by solving the combined models,and hence a method for studying motion and forces of the beam pumping system driven by different types of motor is provided.The simulation...

A mathematical simulation model for the beam pumping well system was presented,including the mechanical model and the kinematic model of rod string,fluid column and of beam pumping unit as well as the motor behavior model.The dynamics of the beam pumping well system can be described in a more realistic way by solving the combined models,and hence a method for studying motion and forces of the beam pumping system driven by different types of motor is provided.The simulation results show that there exist remarkable differences between the beam pumping wells driven by high slip motor and those by low slip motor on the aspect of motion and forces.The motor behavior,therefore,needs to be considered in use or design.

Based on the working condition of the pumping well system, through the study on the production string of the oil well, a mechanical model for studying the vibration characteristics of tubing string has been established. From which the mathematical models like wave equation, natural frequency equation and tubing string vibration displacement equation used to describe the tubing string vibration laws have been educed. This paper also studies the relationship between the exciting...

Based on the working condition of the pumping well system, through the study on the production string of the oil well, a mechanical model for studying the vibration characteristics of tubing string has been established. From which the mathematical models like wave equation, natural frequency equation and tubing string vibration displacement equation used to describe the tubing string vibration laws have been educed. This paper also studies the relationship between the exciting frequency that can cause the tubing string to resonate and the natural frequency of the tubing string.