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  • Inventor(s):
    Arthur H. Hale, Peringandoor R. Hariharan, Sanjit Roy
    Patent Number:
    US 5637795 B2

    A novel process and apparatus have been contrived for the study of the bit/stabilizer balling phenomenon in the laboratory. The device permits a standard testing procedure using a specially designed bob simulating the drill bit for comparing degrees of balling for different rock formations under different drilling conditions involving variable and controlled parameters like weight-on-bit, revolutions-per-minute (rpm), drilling fluids, etc.

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