作者: Jack E. Miller , Jerry P. Allamon , Kenneth David Waggener
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摘要: The present invention relates to a wiper plug and internal drop ball mechanism that may be used in conjunction with downhole surge reduction tool run, hang, cement casing liners wellbore. apparatus of the comprises assembly removably attached drill string within liner, sub below which releases float valve actuator having diameter larger than string, equipment plurality flapper valves. further comprise diverter connected between liner.