SI Units for Drilling Industry
SI Units for Drilling Industry | |
| | | | |Conversion |
|Quantity |Previous | | |Factors |
|Property |Units |SI Unit |Symbol |Multiply by |
|Depth |feet |meters |m |0.3048 |
|Hole & Pipe | | | | |
|Diameters |inches |millimeters |mm |25.4 |
|Bit Size | | | | |
|Weight on bit |pounds |decaNewtons |daN |0.445 |
|Nozzle Size |32nds inch |millimeters |mm |0.794 |
|Drill Rate |feet/hour |metres per hr. |m/h |0.3048 |
|Volume |barrels A.P.I |cubic metres |m3 |0.159 |
|Pump Output |gals/stroke |cubic metres |m3/stroke |0.00378 |
|& Flow Rate | |per stroke | | |
| |gals/min |cubic meters |m3/min |0.00378 |
| | |per minute | | |
| |bbls/stroke |cubic metres |m3/stroke |0.159 |
| | |per stroke | | |
| |bbls/min. |cubic metres |m3/min |0.159 |
| | |per minute | | |
|Annular Velocity |feet/min |metres per min |m/min |0.3048 |
|Slip Velocity | | | | |
|Liner Length |inches |millimeters |mm |25.4 |
|& Diameter | | | | |
|Pressure |psi |kilopascals |kPa |6.895 |
| | |megapascals |MPa |0.006895 |
|Bentonite Yield |bbls/ton |cubic metres |m3/t |0.175 |
| | |per tonne | | |
|Particle Size |microns |micrometres |μm |1 |
|Temperature | °Fahrenheit |°Celsius |°C |°F-32 |
| | | | |1.8 |
|Mud Density |lbs/gallon |kilograms per |kg/m3 |119.83 |
| | |cubic metre | | |
|Mud Gradient |psi/foot |kilopascals per |kPa/m |22.62 |
| | |metres | | |
|Funnel Viscosity |secs/quart |secs per litre |s/L |1.057 |
|Apparent & |centipoise |millipascal |mPa(s |1 |
|Plastic Viscosity | |seconds | | |
|Yield Point |1b,/100ft2 |pascals |pa |0.4788 |
|Gel Strength | | | |(0,5 for field use) |
|& Stress | | | | |
|Cake Thickness |32nds inch |millimeters |mm |0.794 |
|Filter Loss |milliliters |cubic |cm3 |1 |
| |or c.c. |centimeters | | |
|MBT (Bentonite |pounds/bbl |kilograms per |kg/m3 |2.85 |
|Equivalent) | |cubic metres | | |
|Material |pounds per |kilograms per |kg/m3 |2.85 |
|Concentration |barrel |cubic metre | | |
|Shear Rate |reciprocal |reciprocal |s-1 |1 |
| |seconds |seconds | | |
|Torque |foot pounds |Newton metres |N(m |1.3558 |
|Table Speed |revolutions |revolutions |r/min. |1 |
| |per minute |per minute | | |
|Ionic Mass |parts per |milligrams per |mg/L |1 |
|Concentrations |million |litre | | |
|Ionic Concentr- |equivalents per |mols per cubic |mol/ m3 |1 |
|ations in water |million |meter | | |
|Corrosion Rate |pounds per square |grams per square |g/ m3d |13.377 |
| |foot per year |meter day | | |
| |mils per year |millimeters per year |mm/a |0.0254 |
Sand, solids and oil content will be reported as volume fraction using the symbol Ø substance, e.g., 12% by volume of solids will be reported as “Ø solids = 0.12”
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