Downhole window finder and method of using the same

摘要

The present invention relates to a downhole method and apparatus for locating a window in a wellbore casing and determining the depth and orientation of said window. Apparatus of the present invention comprises a body ( 4 ) and a window engaging member ( 6 ) mounted on said body ( 4 ) so as to be movable between a retracted position and an extended position. The engaging member ( 6 ) is adapted to project into a wellbore window when in the extended position during use and is further adapted to engage with a first position of said window in such a way that, when pressed against said window portion, the engaging member ( 6 ) tends to slide along wellbore edge defining said window portion so as to locate the engaging member ( 6 ) centrally in said window portion before preventing movement of the apparatus in the direction of pressing. The invention thereby allows the depth and orientation of a window in a wellbore to be determined.