Considerable friction and heat by rotational and hydraulic forces of the bit and drillstring
•Circulation of the fluid cools the drillstring and bit distributing it throughout the wellbore.
•The drilling fluid also helps to cool down the bottom hole temperature.
•Drilling fluid also lubrictesthe BHA further reducing frictional heat.
When required lubricaingadditives are put into the fluid to further mitigate the problem
•Without the cooling and lubricating action of the drilling fluid many sensitvemotors and components could not function or would fail under the heat. •Indications of poor lubrication are increased torque and drag, abnormal wear and heat checking of the drillstring compenents
Altering the lubricity of the drilling fluid is far from an exact science
•Many different drilling fluids exist from oil-based to silicate water based. •Different methods and additives are available to reduce torque and drag from actual lubricating oils to graphite material to lubricating polymeric beads
•Circulation of the fluid cools the drillstring and bit distributing it throughout the wellbore.
•The drilling fluid also helps to cool down the bottom hole temperature.
•Drilling fluid also lubrictesthe BHA further reducing frictional heat.
When required lubricaingadditives are put into the fluid to further mitigate the problem
•Without the cooling and lubricating action of the drilling fluid many sensitvemotors and components could not function or would fail under the heat. •Indications of poor lubrication are increased torque and drag, abnormal wear and heat checking of the drillstring compenentsAltering the lubricity of the drilling fluid is far from an exact science
•Many different drilling fluids exist from oil-based to silicate water based. •Different methods and additives are available to reduce torque and drag from actual lubricating oils to graphite material to lubricating polymeric beads
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