Analytical method of the equipment of water pumping and gas production with the sucker-rod pump for the CBM wells

By analyzing the geometric relationship and the kinetic characteristics of the special walking-beam pump for exploring coalbed gases, the paper builds its kinetic model, provides solutions of its kinetic parameters and the dynamic analytic equations of the components, and calculates its kinetic and dynamic regulations by example. The results show that the method is easy, which could analyze the kinetic regulations and the dynamic properties of components quantificationally. completely satisfy the demand of the site data calculation, and characterize the important directive significance and application value for the design calculation, the systematic analysis and the selecting research of this equipment for coalbed gases.