If the interference effects of gas production rate higher than the pump intake level;cause excessive smoke if low, the surface should be pumping at or near the entrance.

• 应用生产液面测量结合示功图可了解井是否以最大产量生产、液柱高度是否高于泵吸入口深度、泵是否不完全充满和游离气是否沿套管环空向上运移。