Drill bit with removable journal and integral sensors

摘要

A drill bit 70 comprises a body 73 adapted to be coupled to a drill string. The body also contains a sensor, such as a temperature sensor. The drill bit has a single journal 72 removably mounted to the bit body, and a roller cone 71 rotatably mounted to the single journal. The bit body may have a box-end connection 76 to connect to a drill string, and short-hop telemetry transmitter disposed in the bit body.