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| model yfz-c mechanical drill-out free stage collar |
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features
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the circulation ports are mechanically opened by free-fall opening plug.
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after circulation ports are closed, keep building up pressure will enable the sliding sleeves and other accessories to free fall to bottom, eliminating drill-out.
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the stage collar is designed with internal closing structure. the closing sleeve is designed with hold down mechanism.
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applicable well inclination: ≤25°.
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