Page 107 - Formulas and Calculations for Petroleum Engineering

100 Formulas and calculations for petroleum engineering

Formula(s)

ID 2
C ¼
1029:4

Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, second edition,
Gulf Professional Publishing, Page: 25.

2.59 Drill pipe or drill collar displacement and weight

Input(s)
ID: Inner Diameter (in.)
OD: Outer Diameter (in.)

Output(s)
Disp: Drill Pipe/drill Collar Displacement (bbl/ft)
W: Drill Pipe/drill Collar Weight (lb/bbl)

Formula(s)

2
OD ID 2
Disp ¼
1029:4
W ¼ Disp 2747

Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, second edition,
Gulf Professional Publishing, Page: 25.

2.60 Drill string design—Drill pipe length for bottomhole assembly

Input(s)
BF: Buoyancy Factor (dimensionless)
T: Tensile Strength for New Pipe (lb)
f: Safety Factor to Correct New Pipe to No. 2 Pipe Equal to 1-safety Factor of Pipe (fraction)
MOP: Margin of Overpull (lb)
W bha : Bha Weight in Air (lb)
W dp : Drill Pipe Wt in Air including Tool Joint (lb)
BHA I : Length of Bore Hole Assembly (dimensionless)

Output(s)
L max : Drill Pipe Length for a Specific Bore Hole Assembly (fraction)
Depth t : Total Depth That Can be Reached with a Specific Bottomhole Assembly (ft)