FIELD: oil-and-gas industry.
SUBSTANCE: casing string perforation tool contains a case with pyrotechnic charge. At that amount of charges per case length unit is variable in order to decrease well watering. Casing string perforation method includes descending the case with pyrotechnic charge inside, at that execute perforation with variable holes area per length unit in order to decrease well watering.
EFFECT: well watering decrease.
11 cl, 12 dwg
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