With the development of energy-saving oil-pumping unit, people pay more attention to its integrated indicators, which include low energy consumption, high efficiency, good quality, low price, high reliability, easy operation and maintenance and so on. Energy-saving oil pumping unit, which is a beam pumping unit variant. The pumping unit gear reducer and balance system on both sides were placed in the bracket. Pumping unit is running, swinging back and forth a balanced system, balance system, the balance of the crank angle of a certain bias to eliminate the reciprocating inertia force when the balance of the block to balance the effect. Balance the effect of the pumping unit balance with the gas pumping quite, but the process than simply pumping gas balance
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