Drilling Industry Glossary
fault
filtrate alkalinity
fine LCM
fish
fishing
float collar
float shoe
floorhand
formation
fourble
fracture gradient
fracture pressure
friction
friction factor (F.F.)
funnel viscosity
Friction
Resistance to movement created when two surfaces are in contact. The friction factor, sometimes called friction coefficient, is a dimensionless scalar value that describes the ratio of the force of friction between two bodies and the force pressing them together. The coefficient of friction depends on the materials used; for example, ice on steel has a low coefficient of friction, while rubber on pavement has a high coefficient of friction. Coefficients of friction range from near zero to greater than one - under good conditions, a tire on concrete may have a coefficient of friction of 1.7.
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