Stretch Force from Elastic Elongation Formula
Stretch Force from Elastic Elongation calculates force applied to stretch material for drillstring and rig mechanics workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (A, E, L_a, L_b) are known and the assumptions behind the cited drillstring and rig mechanics relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, F equals 1,000,000 N.
0.005
200000000000
10.01
10
Inputs
A
m^2Cross-sectional area
E
N/m^2Young modulus
L_a
mNew length
L_b
mOriginal length
Outputs
F
Force applied to stretch material
A
Cross-sectional area
E
Young modulus
L_a
New length
L_b
Original length
Source and review
reviewed501 Solved Problems and Calculations for Drilling Operations, Robello, S.E. (2015)
Samuel, E. Robello. 501 Solved Problems and Calculations for Drilling Operations, Sigma Quadrant, Houston, Texas, 2015, Page 350.
Source