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Boreanordning med utskiftbart kjernebor og sentraldel av boreverktøy
Boreanordning med utskiftbart kjernebor og sentraldel av boreverktøy
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机译:具有可替换的岩心钻和钻具中心部分的钻具
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摘要
Apparatus for interchanging the central portion of a drill tool with a core barrel is disclosed. The interchange is effectuated without the need for raising the drilling tool with the drive turbine. Both the core barrel and the central portion of drilling tube have barrel tubes associated therewith and a seating associated with a receiver tube rotating with the tool holds the barrel tube in a vertical position. The end of the core barrel is spaced from the inside end of the barrel of the drilling tool to avoid friction and facilitate the cutting of the core.
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