The paper studies squeezed cap of piercing plugs nose, failure mechanism of melting, influence factor and the process measure of lengthening the service life of plug.
研究了穿孔顶头鼻部压堆戴帽和熔化的失效机制，影响因素，提出了延长顶头使用寿命的工艺措施。
2
The distribution of low permeability interbeds within a massive petroleum reservoir with gas cap and bottom water is a key geologic factor affecting the development method and result of the oilfield.
块状气顶底水油气藏储集层中低渗透夹层的分布是影响油气藏开发方法及开发效果的关键地质因素。
3
The replacement ratio is the main factor for the increase of proportion of pile bearing load, and the main way is to raise the replacement ratio of piles and the size of the pile cap.