Page 7 - Drilling a Straight Hole

English-Units-to-SI-Units Conversion Factors

Quantity Multiply To Obtain
Petroleum Extension-The University of Texas at Austin
or Property English Units English Units By These SI Units
Length, inches (in.) 25.4 millimetres (mm)
depth, 2.54 centimetres (cm)
or height feet (ft) 0.3048 metres (m)
yards (yd) 0.9144 metres (m)
miles (mi) 1609.344 metres (m)
1.61 kilometres (km)
Hole and pipe di ame ters, bit size inches (in.) 25.4 millimetres (mm)
Drilling rate feet per hour (ft/h) 0.3048 metres per hour (m/h)
Weight on bit pounds (lb) 0.445 decanewtons (dN)
Nozzle size 32nds of an inch 0.8 millimetres (mm)
3
barrels (bbl) 0.159 cubic metres (m )
159 litres (L)
3
gallons per stroke (gal/stroke) 0.00379 cubic metres per stroke (m /stroke)
ounces (oz) 29.57 millilitres (mL)
3
3
Volume cubic inches (in. ) 16.387 cubic centimetres (cm )
3
cubic feet (ft ) 28.3169 litres (L)
3
0.0283 cubic metres (m )
quarts (qt) 0.9464 litres (L)
gallons (gal) 3.7854 litres (L)
3
gallons (gal) 0.00379 cubic metres (m )
pounds per barrel (lb/bbl) 2.895 kilograms per cubic metre (kg/m )
3
3
barrels per ton (bbl/tn) 0.175 cubic metres per tonne (m /t)
gallons per minute (gpm) 0.00379 cubic metres per minute (m /min)
3
3
Pump output gallons per hour (gph) 0.00379 cubic metres per hour (m /h)
3
and flow rate barrels per stroke (bbl/stroke) 0.159 cubic metres per stroke (m /stroke)
3
barrels per minute (bbl/min) 0.159 cubic metres per minute (m /min)
Pressure pounds per square inch (psi) 6.895 kilopascals (kPa)
0.006895 megapascals (MPa)
°F - 32
Temperature degrees Fahrenheit (°F) degrees Celsius (°C)
1.8
Mass (weight) ounces (oz) 28.35 grams (g)
pounds (lb) 453.59 grams (g)
0.4536 kilograms (kg)
tons (tn) 0.9072 tonnes (t)
pounds per foot (lb/ft) 1.488 kilograms per metre (kg/m)
3
Mud weight pounds per gallon (ppg) 119.82 kilograms per cubic me tre (kg/m )
3
pounds per cubic foot (lb/ft ) 16.0 kilograms per cubic me tre (kg/m )
3
Pressure gradient pounds per square inch
per foot (psi/ft) 22.621 kilopascals per metre (kPa/m)
Funnel viscosity seconds per quart (s/qt) 1.057 seconds per litre (s/L)
2
Yield point pounds per 100 square feet (lb/100 ft ) 0.48 pascals (Pa)
2
Gel strength pounds per 100 square feet (lb/100 ft ) 0.48 pascals (Pa)
Filter cake thickness 32nds of an inch 0.8 millimetres (mm)
Power horsepower (hp) 0.75 kilowatts (kW)
2
2
square inches (in. ) 6.45 square centimetres (cm )
square feet (ft ) 0.0929 square metres (m )
2
2
2
2
Area square yards (yd ) 0.8361 square metres (m )
2
2
square miles (mi ) 2.59 square kilometres (km )
acre (ac) 0.40 hectare (ha)
Drilling line wear ton-miles (tn•mi) 14.317 megajoules (MJ)
1.459 tonne-kilometres (t•km)
Torque foot-pounds (ft•lb) 1.3558 newton metres (N•m)
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