发明名称 CASING BIT AND CASING REAMER DESIGNS
摘要 A casing end tool has a bowl-like (or cup-like) body defined by a wall having an outer convex surface and an inner concave surface opposite of the outer convex surface. The bowl-like body has a center axis. The inner concave surface is non-axisymmetric with respect to the center axis, while the outer convex surface is axisymmetric with respect to the center axis. The non-axisymmetric configuration is provided in one implementation through the presence of a set of raised boss or land structures formed on the inner concave surface. In another implementation, the non-axisymmetric configuration is provided by channels formed in the inner concave surface.
申请公布号 EP2394016(A4) 申请公布日期 2015.11.04
申请号 EP20100784132 申请日期 2010.06.03
申请人 VAREL INTERNATIONAL, IND., L.P. 发明人 KING, WILLIAM, W.;DREWS, STEVEN, W.;REESE, MICHAEL, R.;KIRK, IAN, ALASTAIR
分类号 E21B10/36;E21B10/00;E21B21/10 主分类号 E21B10/36
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