DRILL BIT SYSTEMS WITH TEMPERATURE SENSORS AND APPLICATIONS USING TEMPERATURE SENSOR MEASUREMENTS

摘要

A drill bit includes a plurality of blades. The blades provide a plurality of cutting elements or teeth arranged on a leading face of the blade. At least one temperature sensor is provided adjacent at least one of the teeth of at least one blade to sense a local temperature of the blade adjacent that tooth. Multiple temperature sensors may be provided adjacent different teeth of a blade or adjacent the teeth of at least two blades, or adjacent multiple teeth of multiple blades. Another temperature sensing element may be provided on a proximal portion of the blade distant from the cutting elements or on the shank of the bit to provide a reference temperature for the drill bit or for the blade. Information obtained by the temperature sensing elements is used to provide information regarding at least one of the drill bit, the drilling environment and the formation.

主权项

1. A formation drill bit system, comprising:
a) a shank defining a longitudinal axis and having a proximal end and a distal end, said shank adapted to being rotated about said longitudinal axis; b) a drill head fixed to a distal end of said shank, said head having a plurality of stationary blades separated by a plurality of flutes, each of said plurality of blades having a distal end and a leading face in a direction of rotation about said longitudinal axis, each said blade having a plurality of cutting elements arranged on the leading face of the blade at the distal end of the blade; and c) at least one temperature sensing element, said at least one temperature sensing element including a first temperature sensor situated at a location adjacent to a first cutting element of a first of said plurality of blades and arranged for sensing a local temperature of said first blade at said location.