The movement of valve of the oil well pump has not been researched perfectly in theory,and the mathematical models used to describing the movement of the oil pump valve are too simple.
The movement of valve of the oil well pump has not been researched perfectly in theory,and the mathematical models used to describing the movement of the oil pump valve are too simple.
目前抽油泵泵阀运动规律的理论研究还很不完善，所采用的数学模型也过于简单。