Amount of cuttings drilled per foot of hole drilled

a) BARRELS of cuttings drilled per foot of hole drilled:

1029.4 y

Example: Determine the number of barrels of cuttings drilled for one foot of 12-l/4in.-hole drilled with 20% (0.20) porosity:

12 252

1029.4

Barrels = 0.1457766 x 0.80 Barrels = 0.1166213

b) CUBIC FEET of cuttings drilled per foot of hole drilled:

Example: Determine the cubic feet of cuttings drilled for one foot of 12-1/4 in. hole with 20% (0.20) porosity:

12 252

Cubic feet = 150 0626 x 0.7854 x 0.80 144

Cubic feet = 0.6547727

c) Total solids generated:

where Wcg = solids generated, pounds Ch = capacity of hole, bbl/ft L = footage drilled, ft SG = specific gravity of cuttings P = porosity, %

Example: Determine the total pounds of solids generated in drilling 100ft of a 12-1/4in. hole (0.1458bbl/ft). Specific gravity of cuttings = 2.40gm/cc. Porosity = 20%.

W = 9797.26 pounds

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