Abstract:

A method of remote measurement of torque on drilling string (including suspending and drilling weight) while drilling is introduced in this paper .Two ”joints” are added to the top and bottom ends of the Kelly respectively. The torque and suspending weight transducers and signal processing circuits are installed in the joints. The signals of torque and drilling weight, therefore, may be transmitted and received through modulation frequencies. The advantage of this method is that the actual torque acting on the kelly can be measured while drilling.

Key words: Drilling instrument, Drill stem torque, Bit weight, Drilling data, Telemetering