Security DBS Drill Bits

Engineering References

HALLIBURTON

English/Metric Units Conversion Constants

MULTIPLY BY AND OBTAIN

Barrels x 5.61 = Cu. Ft.Barrels x 9702 = Cu. In.Barrels x 42.0 = Gal.Cu. Ft. x 1728 = Cu. In.Cu. Ft. x 0.037037 = Cu. Yd.Cu. Ft. x 7.4805 = Gal.Cu. Ft. x 0.1781 = Bbls. (42 Gal.)Cu. Ft./Min. x 0.1781 = Bbls./Min.Cu. Ft./Min. x 10.686 = Bbls./Hr.Cu. Ft.-Water x 61.31* = PoundsCu. In. x 0.0005787 = Cu. Ft.Cu. In. x 0.004329 = Gal.Cu. In. x 0.0001031 = Bbls.Cu. Yd. x 27.0 = Cu. Ft.Cu. Yd. x 201.977 = Gal.Gal.-Water x 8.33* = PoundsGal. x 0.13368 = Cu. Ft.Gals./Lb. x 8.345 = Litres/Kg.Lbs./Gal. x 0.119839 = Kg./LitresSpecific Gravity x 62.42 = Lbs./Cu. Ft.Specific Gravity x 8.345 = Lbs./Gal.Feet x 0.3048 = MetersFeet x 3.048 = DecimetersFeet x 30.48 = CentimetersInch x 2.54 = CentimetersInch x 25.4 = MillimetersMiles x 5280 = FeetMiles/Hr. x 1.4666 = Ft./Sec.Sq. In. x 0.006944 = Sq. Ft.Sq. Ft. x 144 = Sq. In.Pounds-Water x 0.12005* = Gal.-WaterPounds-Water x 0.016048* = Cu. Ft. WaterHorsepower x 33000 = Ft. Lbs./Min.Horsepower x 550 = Ft. Lbs./Sec.Square of Dia. x 0.7854 = Area of Circle

*Water at 20C. (68F.) **Water at 4C. (39.2F.)

Equations Used in Hydraulic Calculations:Annular Velocity

Va =24.51Q

(Dh)2 - (Dp)2

Surface Equipment Pressure Losses

P = C(Q

)1.86 Type Equipment C

100 1 1.02 0.363 0.224 0.15

Drill Stem Bore Pressure Losses

P = 0.000061 LQ1.86

d4.86

Jet Nozzle Pressure Losses

P = Q2

12,103 (A)2

Annular Pressure Losses

P = (1.4327 X 10-7)LV2

Dh Dp

Jet Velocity

V =0.32086 Q

A

Jet Impact Force

If = 0.000516 QVHydraulic Horsepower

HHp =PQ

1714

Nomenclature:Q = Circulation Rate (gpm)

Dh = Diameter of Hole (in)

Dp = Diameter of Pipe O.D. (in)

Va = Annular Velocity (ft/min)

= Mud Weight (lb/gal)C = Friction Factor

P = Pressure (psi)

L = Length (ft)

A = Area of Nozzle (in2)

P = Pressure Drop (psi)V = Jet Velocity (ft/sec)

If = Jet Impact Force (lbf)

HHp = Hydraulic Horsepower (hp)

d = Inside Diameter (in)

1

6

7

8

2

3

4

5

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Drill Pipe Data

SIZE NOMINAL *EQUIVALENTOD (IN.) WEIGHT (LBS/FT) ID (IN.)

NEW DRILL PIPE

2-7/8 10.4 2.15

3-1/2 13.3 2.76

15.5 2.60

4 14.0 3.34

4-1/2 16.6 3.82

20.0 3.64

5 19.5 4.33

5-1/2 21.9 4.80

24.7 4.60

6-5/8 25.2 5.96* Equivalent ID shown is largest of available Tool Joints.

HEAVY WALL PIPE

3-1/2 26 2.06

4 28 2.56

4-1/2 42 2.75

5 50 3.00

Conversion Formulas

APPLICATION TRADITIONAL CONVERSION METRIC METRICFACTOR SI UNIT SYMBOL

DRILLING DATA

Bit Size inches X 25.4 = millimeter mm

Weight on Bit pounds X .445 = decanewton daN

Depths (Drlg., Casing, etc.) feet X .3048 = meter m

Nozzle Size 32s of an inch X .794 = millimeter mm

Annular Velocity feet per minute X .3048 = meter per minute m/min.

Jet Velocity feet per second X .3048 = meter per second m/s

PUMP AND HYDRAULICS

Liner, Stroke Length and Rod Diameter inches X 25.4 = millimeter mm

Output gal./minute X 3.786 = liter per minute l/min.

Pump Pressure pounds per sq. in. X 6.895 = kilopascal kPa

Mud Volume barrels (U.S.) X .159 = cubic meter m3

Mud Weight pounds per gallon (U.S.) X 119.8 = kilogram per cubic meter kg/m3

Capacities (Annulus, Drill Pipe, etc.) barrels (U.S.)/ft X .5216 = cubic meter per meter m3/m

Density pounds per cubic ft X 16.02 = kilogram per cubic meter kg/m3

Pressure Loss psi/ft X 22.62 = kilopascal per meter kPa/m

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