Patent ID: 6236620
Filing Date: 2001-05-22
Classification: E21B

Abstract:
An integrated well drilling and evaluation system for drilling and logging a well and testing in an uncased well bore portion of the well, comprising:a drill string;a drill bit, carried on a lower end of said drill string, for drilling the well bore;logging while drilling means, included in said drill string, for generating data indicative of the nature of subsurface formations intersected by said uncased well bore, so that a formation or zone of interest may be identified without removing said drill string from said well;a packer, carried on sail drill string above said drill bit, having a set position for sealingly closing a well annulus between said drill string and said uncased well bore above said formation or zone of interest and having an unset position such that said drill bit may be rotated to drill said well bore, said packer being selectively positionable between said set position and said unset position; andtesting means, included in said drill string, for controlling flow of fluid between said formation and said drill string when said packer is in said set position;whereby, said well can be selectively drilled, logged and tested without removing said drill string from said well.