Hi,
I'm looking for some document that explains how to calculate the pullback force necessary to insert a big steel pipe in a borehole realized with the horizontal directional drilling technique.
Does anybody know how I can get it?
Thank you in advance.
Thanks to everybody for your replies.
I think I'm going to proceed as suggested by JStephen: I will convert the units working in the U.S. Customary Units, and at the end, I will re-convert the result into S.I. Units.
So:
being
H=13.8 m = 45.28 ft
D=30.48 m = 100 ft
Ge=0.662
I calculate...
Thanks JStephen.
Your reply supports my persuasion in considering 196 as the right coefficient.
Unfortunately, the purchaser doesn't allow me to replace the written wrong coefficient 1.96, with the right (in my opinion) coefficient 196, unless I will provide some official document like an...
API Standard 650, 11th Edition June 2007, Appendix E, formula (E.6.2.1.1.1-a):
wa=[99*ta*SQR(Fy*H*Ge)]<=wa(max) with wa(max)=1.96*H*D*Ge
where:
Ge=G*(1-0.4*Av)
I’ve tried to calculate wa for an existing welded tank that I know to be self-anchored.
My input data are:
ta=8 mm; Fy=250 Mpa...
Hi,
I'm an italian civil/environmental engineer (excuse me for any mistakes in writing english), and i have to design a welded storage tank of 10000 cubic meters (353150 cubic feet).
The purchaser wants me to design according to API STANDARD 650 although the construction site is in Italy.
I have...
