| 摘要 |
In connection with a method and a tool for preparing a well for the production of hydrocarbons, it is aimed at perforating a casing portion ( 26 ) and working surrounding sediment ( 80 ) in a channel-forming manner. For this purpose the tool comprises a drilling means for drilling transverse holes through the casing wall when the tool ( 10 ), which is arranged to be raised/lowered and rotated about its longitudinal axis, shared by the casing ( 26 ), is placed in a fixed position within the well, through which transverse hole ( 40 ) and into surrounding sediment a jetting hose means ( 42,42 a) is arranged to jet/dig its way in a channel-forming manner. The drilling and jetting hose means also have inactive stand-by positions protectively retracted within the tool housing ( 10 a), from and into which they may successively be pushed forward into active working positions and again be withdrawn, as a channel ( 44 ) is completed in the sediment ( 80 ). |
