About What viscosity of oil is used for rock
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6 FAQs about [What viscosity of oil is used for rock]
What is the minimum oil viscosity for a rock drill?
A minimum oil viscosity of ISO 100 (SAE Grade 30) should be used for any rock drill application. Larger, heavily loaded rock drills operating at elevated temperatures should use oil with a viscosity of ISO 220 (SAE grade 50). The oil must be specified for use in rock drill applications and must contain an extreme pressure additive.
How is oil viscosity determined?
Dead or gas-free oil viscosity is determined as a function of crude oil API gravity and temperature. The viscosity of the gas saturated oil is found as a function of dead oil viscosity and solution gas-oil ratio (GOR). Undersaturated oil viscosity is determined as a function of gas saturated oil viscosity and pressure above saturation pressure.
How is gas saturated oil viscosity determined?
The viscosity of the gas saturated oil is found as a function of dead oil viscosity and solution gas-oil ratio (GOR). Undersaturated oil viscosity is determined as a function of gas saturated oil viscosity and pressure above saturation pressure. Figs. 3 and 4 summarize all of the dead oil viscosity correlations described in Tables 2 and 3.
How does pressure affect viscosity of crude oil?
In general, viscosity characteristics are predictable. Viscosity increases with decreases in crude oil API gravity (assuming a constant Watson characterization factor) and decreases in temperature. The effect of solution gas is to reduce viscosity. Above saturation pressure, viscosity increases almost linearly with pressure.
How does temperature affect oil viscosity?
Four factors affect oil viscosity: As seen with the example of the water above, when the temperature decreases, the water can turn to ice. Similarly, for lubricants, as the temperature drops, the viscosity increases. This means the oil will get thicker or more resistant to flow at lower temperatures.
What lubricant should a rock drill use?
Proper rock drill oil selection is the most important maintenance factor in achieving trouble-free drill operation. Higher productivity, less repair expense and improved driller safety are all benefits of selecting a high quality lubricant. A minimum oil viscosity of ISO 100 (SAE Grade 30) should be used for any rock drill application.


