Apparatus and methods of testing and drilling a well

摘要

The invention relates to an apparatus (10) for use on a drill string for testing an uncased wellbore (14) comprising: a packer (38) having a set position for sealing engagement with the wellbore and an unset position for disengagement from the wellbore; a tester valve (34) in communication with the drill string and having an open position such that fluid from the well will flow into the drill string during a well test when the packer is set and further having a closed position; and a drill bit (44) adapted for further drilling of the well after the packer has been set and unset. <IMAGE>