The technology uses deep penetration perforation charge with high perforation density and large perforation diameter and surging perforation with greater pressure differential.
它采用高孔密大孔径深穿透射孔弹和大压差抽吸炮眼清洗技术，不仅能提高油井产能，解除近井带污染，还可以改善防砂完井效果。
So choosing correct underbalance pressure differential is key factor for underbalance perforation design.
选取合适的负压值是负压设计的关键。
Objective To discuss the clinical value of CEUS in diagnosis and differential diagnosis of gallbladder perforation with liver abscess.
目的探讨CEUS诊断和鉴别诊断胆囊穿孔伴肝脓肿的应用价值。
Objective To discuss the clinical value of CEUS in diagnosis and differential diagnosis of gallbladder perforation with liver abscess.
目的探讨CEUS诊断和鉴别诊断胆囊穿孔伴肝脓肿的应用价值。
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