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perforeringsindretning to several shots intended to ru00f6rfu00f6ring
perforeringsindretning to several shots intended to ru00f6rfu00f6ring
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机译:将每个镜头隐退到打算射击的几张镜头
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摘要
A perforator apparatus for repeated punching of holes at a multiple of selected locations in tubing of a well bore. The apparatus is activated for repeated punching operations by a fluid control valve mechanism that controls opposed directional movement of a piston connected to a punch of the perforator apparatus.
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