OfiTE 112-00, Instruction Manual, Page: 16 / 16

Correction Factor =
Mud Lubricity Coefficient = × Correction Factor
Percent (%) Torque Reduction at a Given Load = × 100
Where:
A
L
= Torque reading of untreated mud under force equal to B
L
B
L
= Torque reading of treated mud under force equal to A
L
Coefficient of Friction = =
Where:
F = The frictional force required to slide the block and ring surfaces
across each other at a given rate and is measured by the num-
ber of amperes required to turn the test ring at a prescribed
number of revolutions per minute.
W = The load or force with which the test block is pressed against
the test ring through the torque arm.
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15
F
W
Meter Reading
100
Meter Reading
100
Standard Meter Reading for Water
Actual Meter Reading for Water
A
L
- B
L
A
L