Patent ID: 8069920

Claim:
A down-hole assembly for locating a window and reentering a lateral well bore in a main well bore after removal of a whip stock, comprising: a running tool having an upper section, a middle section and a lower section, said running tool including a window locator for locating said window, said window locator comprising a pivoting arm and a window locating head; a guide member having an upper section, a middle section and a lower section, said guide member having a wedged-shaped outer surface for diverting a down-hole tool through said window and into said lateral well bore; wherein said lower section of said running tool and said upper section of said guide member are each shaped to receive the other in mating relationship; wherein said lower section of said running tool and said upper section of said guide member are capable of being detachably connected, and when detachably connected, said running tool and said guide member are in fluid communication; wherein said window locating head has a run-in position, a retracted position, and a window locating position and wherein in said window locating position, said window locating head is biased in a direction external to said running tool and a portion of said window locating head is positioned within said window; and wherein said running tool includes a stop means for preventing retraction of said window locating head from said window locating position to enable determination of an upper edge of said window by pulling upward on said tool and of a lower edge of said window by pushing downward on said tool.