| 摘要 |
Device for cutting a window in casing string includes a deflecting tool in cylindrical shape, its upper part is arranged with inclined section of side surface, mill-reamer. At the inclined section of the deflecting tool a longitudinal slot is provided, there a cover plate is placed, this in transport position is fixed with shear element, and the upper section is equipped with shaped support element radius of which is equal to radius of pusher in cylindrical shape that is placed in the drill string at calculated distance from the end of the reamer, besides that on the inclined surface a fixation means are installed, in the lower section of the deflecting tool a depression is provided, and the mill-reamer is arranged as double-acting. |
