By use of oriented perforator,a certain variance of angle and azimuth between actual perforated hole and former design is made which mainly caused by hole trace,perforated hole angle.

　
英 美
  • 采用定向射孔,使得實(shí)際射孔孔眼與原來(lái)設計的具有一定角度和方位的偏差,主要有孔眼軌道產(chǎn)生的偏差、孔眼角度產(chǎn)生的偏差等。
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