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Horizontal directional drilling

Horizontal directional drilling

Horizontal directional drilling

(OP)
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.

RE: Horizontal directional drilling

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.

RE: Horizontal directional drilling

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.

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