Integrated well drilling and formation evaluation system

摘要

Integrated drilling and evaluation system for drilling, logging and testing a well comprises a drill string (18A), a drill bit (30) carried on a lower end of the drill string for drilling a well bore, logging while drilling means (28) included in the drill string for identifying subsurface zones of formations (16) of interest, packer means (24) carried on the drill string above the drill bit (30) for sealing a zone or formation (16) of interest below the packer means (24), and a fluid testing means (22) included in the drill string for controlling the flow of well fluid from the zone or formation of interest into the drill string. The system allows one or more subsurface zones or formations (16) of interest in a well to be drilled, logged and tested without the necessity of removing the drill string (18A) from the well. $$