Horizontal directional drilling

[giuliese]

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.

 

[cvg]

call up a boring contractor and ask them. This is highly variable and not something you can calculate with much accuracy. Usually estimated based on previous experience.

 

[MTPipeliner]

There is some software in the TechnicalToolboxes package that will help you predict the pulling force. I'm not sure what the software costs per year, but I know it is fairly expensive. When I have used it in the past it has been in the ball park, but I wouldn't say it's been terribly accurate.

Trying to do the calculations by hand would be pretty tedious.

Talking to a reputable contractor would be a good place to start if you don't have access to a software package that can help you.