DEVICE FOR MONITORING A DRILLING OR CORING OPERATION AND INSTALLATION COMPRISING SUCH A DEVICE

摘要

Device comprising autonomous monitoring equipment for measuring and storing, for subsequent analysis, downhole parameters of a drilling or coring operation by means of a drillbit fixed to the end of a drill string, characterized in that the measurement equipment (7) is housed in a single chamber (5) made in a coupling (1, 18) that is designed to be interposed between two drill string pipes or between the drillbit and a drill string pipe, wherein the coupling (1, 18) is cylindrical and the chamber is an annular groove (5) made on the periphery of the coupling, and wherein the measurement equipment (7) includes a strain gauge placed in the bottom of the annular groove (5).