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Subject: perf-to-perf oil ....to prevent failure of the sand around the perforation tunnel and minimize perf-to-perf collapse.
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| perforation to perforation collapse (that is, in between perforations?) IMHO. |
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... для предотвращения обрушения песка вокруг канала перфорации и для минимизации смятия (ослабления) породы между каналами перфорации. имхо |
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