A.P.I. American Open Hole Threads (A.O.H.) 1

[jvw86]

Hi,
I'm trying to find a detail (diameters, taper, thread form, etc) of API American Open Hole threads. I've googled way too long with no results.
Can anyone help?
Thanks,
John

 

[chicopee]

What in the name of Sam Hill is an API Open Hole Threads? I've heard and use American Standard(Taper) Pipe Threads though.

 

[racookpe1978]

Well, I guess all the American Closed Hole threads were too tight to loosen. 8<)

Is NPT the term you are looking for? There are many references for the pipe size, pipe thread OD, tap hole size, and drilled (through hole, pipe ID) size.

 

[hydtools]

Here is one I found:

http://www.oilfieldrentals.com/dd/35.html

Ted

 

[hydtools]

Here is another one. See page 1-7.

http://wellwerks-intl.com/files/BakerTechfacts.pdf

Ted

 

[jvw86]

Thank you so much hydtools!! That's exactly what I was looking for.

 

[chicopee]

Comparing with pipe threads, the AOH threads are a lot coarser than pipe threads--I guess because of the sand and dirt from drilling operations. Great reference Hydtools