在套管的强度方面，分析了水泥坏、射孔、非均匀载荷等套管强度的影响，提出了套管强度减弱系数的概念。
In strength of casing, based on analyzing the influences made by cementing, perforating and non-uniform, the concept of decrease factor of casing strength.
从16口超高压射孔完井的压力恢复曲线统计可知，14口井的表皮系数为负值。
From the pressure buildup curve of 16 Wells who used over-high pressure, the skin factor of 14 Wells is negative.
实践证明，水力射孔井能够起到改善完井效果、降低表皮系数的作用。
Water-power deep perforation well can ameliorate perforation completion and reduce skin factor of pollution during drilling.
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