Pipe Stretch - Work

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UPDATE 28th of January 2020: the virus happened just over a week ago. We've temporarily cut and pasted the text parts of the Mathcad pages rather than having blank pages there.

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Pipe stretch, release 1, issued 7 March 2010. WORK version.

This worksheet exists in two versions. They are identical apart from the way they are formatted. The Work version hides intermediate calculations and allows the user to see the results just below the inputs. This is useful for quick “what-if” games, changing various inputs to see what works best. The Audit version displays all intermediate calculations.


This worksheet will calculate the change in length of pipe due to a) it’s own weight when submerged in fluid, b) additional axial load (tension or compression) and c) a change in the average temperature.


psi/ftSG or kg/lppgkPa/mlb/ft3lb/bbl

Mud density. Jmudsg



Steel vertical length. L_Vsteel




Pipe OD and ID. L_Dpipe & L_dpipe



Average temperature change. TΔ

Enter a -ve value if the temperature drops



Additional load. Fα

Enter a -ve value if axial compressive force

Click when modified to update the result.


Original length of pipe

Length of pipe due to

axial and thermal strain

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