Jet Sizes 32s mm 7 5.6 8 6.4 9 7.1 10 7.9 11 8.7 12 9.5 13 10.3 14 11.1 15 11.9 16 12.7 18 14.3 20 15.9 22 17.5 24 19.1 26 20.6 28 22.2 30 23.8 32 25.4 36 28.6 40 31.8 Note: 36 = 1.125" or = 11/8" 40 = 1.25" or = 11/4" To obtain the size of any jet in 32s, multiply its size in inches by 32. Example: 1.125" x 32 = 36 or 0.75" x 32 = 24
K5
Jet Sizes 32s mm 7 5.6 8 6.4 9 7.1 10 7.9 11 8.7 12 9.5 13 10.3 14 11.1 15 11.9 16 12.7 18 14.3 20 15.9 22 17.5 24 19.1 26 20.6 28 22.2 30 23.8 32 25.4 36 28.6 40 31.8 Note: 36 = 1.125" or = 11/8" 40 = 1.25" or = 11/4" To obtain the size of any jet in 32s, multiply its size in inches by 32. Example: 1.125" x 32 = 36 or 0.75" x 32 = 24
E6
Jet Sizes 32s mm 7 5.6 8 6.4 9 7.1 10 7.9 11 8.7 12 9.5 13 10.3 14 11.1 15 11.9 16 12.7 18 14.3 20 15.9 22 17.5 24 19.1 26 20.6 28 22.2 30 23.8 32 25.4 36 28.6 40 31.8 Note: 36 = 1.125" or = 11/8" 40 = 1.25" or = 11/4" To obtain the size of any jet in 32s, multiply its size in inches by 32. Example: 1.125" x 32 = 36 or 0.75" x 32 = 24
N6
The average S.G. of the drilling cuttings is 2.6. The Specific Gravity Range for some formations is: Anhydrite..... 2.9 Limestone..... 2.7 - 2.9 Clays.......... 2.5 - 2.7 Dolomite...... 2.86 Salt............ 2.2 Pyrite......... 5.02 Quartz........ 2.65 Sand / SS..... 2.1 - 2.7 Shale.......... 2.2 - 2.9 Slate........... 2.7 - 2.8
E7
Measured T.D. of last Casing String.
N7
If cuttings are round enter same value as below.
E9
Jet Sizes 32s mm 7 5.6 8 6.4 9 7.1 10 7.9 11 8.7 12 9.5 13 10.3 14 11.1 15 11.9 16 12.7 18 14.3 20 15.9 22 17.5 24 19.1 26 20.6 28 22.2 30 23.8 32 25.4 36 28.6 40 31.8 Note: 36 = 1.125" or = 11/8" 40 = 1.25" or = 11/4" To obtain the size of any jet in 32s, multiply its size in inches by 32. Example: 1.125" x 32 = 36 or 0.75" x 32 = 24
H9
If no Heavy Weight Drill Pipe is used, you can enter here half the length of the Drill Pipe in the O.H. Annulus or you can enter 0. (If you do enter in this section regular Drill Pipe values PLEASE DO remember to enter 0 in the Mass cell or else the calculated Available WOB will be WRONG!)
M9
Jet Sizes 32s mm 32s mm 7 5.6 18 14.3 8 6.4 20 15.9 9 7.1 22 17.5 10 7.9 24 19.1 11 8.7 26 20.6 12 9.5 28 22.2 13 10.3 30 23.8 14 11.1 32 25.4 15 11.9 36 28.6 16 12.7 40 31.8 Note: 36 = 1.125" or = 11/8" 40 = 1.25" or = 11/4" To obtain the size of any jet in 32s, multiply its size in inches by 32. Example: 1.125" x 32 = 36 or 0.75" x 32 = 24
Heavy Weight Drill Pipe Size & Mass O.D. in I.D.in lbs/ft 3.5…………2.08..….…. 26.0 4.0…………2.58…...…. 28.0 4.5…………2.77…...…. 42.0 5.0…………3.02…….... 50.0
K13
To maintain a healthy mud system, free of fine low gravity solids, the flow rate of the Solids Control Equipment (desilters and desanders) should be around 150% of the drilling flow rate (for centrifuges 110% to 120% is sufficient).
E14
The number of (the same as above) pumps to be used 1 , 2 or 3 ...
H18
Recommendations for main hole drilling (without mud motor): in water based mud systems use 3 - 8 HSI, (most wells require only 3 - 4 HSI) for PDC bits use 3 - 6 HSI In oil based mud systems use 3 - 6 HSI.
E19
After entering (in the Jet section) the sizes of Jets suggested and the Stand Pipe Pressure exceeds the Max. Operating Press, this due to: the Pump OutPut EXCEEDS the Critical Flowrate (see its value below).
N19
For tricone bits, use any number (1 or 2 or 3 or even 4) of jets you like or required with an equal to recommended or to optimum TFA. For PDC bits, use the size combination and the number of jets you need (usually, the larger jets go on the bottom and the smaller ones on the sides of the cutting face) with an equal to recommended or optimum TFA. NOTE: The above recommendations do not apply to drilling with mud motor.
O19
Enter the Nozzle Sizes suggested below to the Nozzle Input table above to improve the Hydraulics of your choice.
E20
Minimum Net Pump Engine Power Requirements to produce the Pump Output and the Pressure needed.
H20
The Bit PD fraction recommended for main hole drilling (without mud motor) is 55 - 65 %.
H22
Recommended jet velocities to drill main hole (without mud motor): in water based mud systems use 350 / 500 ft/sec in oil based mud systems use 250 / 450 ft/sec. Table with Recommended Jets Velocities Formation Type Jet Velocities ft/sec Soft, Gummy..............275 - 315 Fractured, Faulted & Rubble.....295 - 345 Medium to Hard..............330 - 380 Hard..............380 - 480
F29
Calculated for TVD effect on BHP. On vertical wells this value of the Trip Margin is equal to the Annular Frictional Losses during circulating (clean annulus, assuming hole was circulated clean and a flow check contacted). You can also use for Trip Margin the value of Losses during drilling (with cuttings in the annulus adding to the BH pressure) found in CELL O34.
L29
For an accurate calculation of the sample's Lag Time enter the values of Specific Gravity, Thickness of Cuttings and Width of Cuttings as close to actual as possible. (Cuttings are only what the geologist collects, the rest, is just debris from cave-ins and sloughing from higher up the hole).
I32
Try keep it to less than 4% or 5%.
N32
After the annulus is circulated clean.
N33
Adjusted for TVD. To view Effective (or Acting) Hydrostatic pressure while circulating enter 0 for Penetration Rate (ROP).
N36
The increase of the Plastic Viscosity value between mud-checks indicates the accumulation of Low Gravity solids and the need for treatment with water dilution, centrifuge or both.