کلمه perforation یافت شد:
n: a hole made in the casing, cement, and formation through which formation fluids enter a wellbore. Usually several perforations are made at a time.
n: the hole that the bullete passes through the casing and cement rock , then enters into layer.
a hole made through the casing and cement and into the formation. It has a characteristic entrance hole and penetration. It is the flow path from the formation to the wellbore in a cased and cemented completion.
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