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Browsing by Subject "spiral drill collars"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Ekwiwalentne i zastępcze średnice zewnętrzne obciążników spiralnych
    (2011) Rzyczniak, Mirosław
    In the article, there is the introduction of the theoretical bases of calculating the equivalent and the substitute outside diameters value of spiral drill collars. There is a calculation of the value of the equivalent and the substitute diameters and the length of the spiral parts, for sizes of spiral drill collars being produced.