作者: Boris (Bruce) P. Cherewyk
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摘要: Apparatus is provided injecting drop balls into a wellbore, such as for actuating downhole tools. A ball magazine adapted storing balls, in two or more transverse chambers, axially movable housing mounted at port to fluid passage communication with the wellbore. The serially actuable aligning first and subsequent chambers stored An indicator, rod extending from housing, can be used indicate relative location of chamber port. apparatus system methodology tools spaced intervals along