Method for determining the wear of the cutting means of a tool d

Details Method for determining the wear of the cutting means of a tool d Method for determining the wear of the cutting means of a tool d

1988-09-19

1990-05-22

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

175 39, E21B 4400

Patent

active

049266861

ABSTRACT:
A method for determining the wear of cutting portion of a tool during drilling of a formation wherein a measurement is taken of the weight W applied to the tool and the torque T required to rotate said tool, the weight on the tool W and the torque T being linked by an equation of the type T=uW+vW.sup..alpha. in which u and v are parameters and .alpha. is a coefficient depending in part on the formation.

REFERENCES:
patent: 3782190 (1974-01-01), Pittman
patent: 4627276 (1986-12-01), Burgess et al.
patent: 4685329 (1987-08-01), Burgess
patent: 4695957 (1987-09-01), Peltier

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