Drill pipe thread gages
- Thread starter Spruewell
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I used to have a book, Baker Hughes Tech Facts, that had detailed data on just about all drill string connections. I don't it anymore unfortunately, and I can't say for sure that thread is in there, but if you can find a copy it might be in there.
alphonso
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Maybe in these. Have several other manuals.
That's the book I was referring to!
Jashley73
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Spruewell
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I'll read through these. So far the Baker Engineering Handbook doesn't have it. There are a couple that are real close, but not quite.
I've looked at the Mills Machine Company chart already and it doesn't seem to have all the information I would need to build gages
Hard gages for Oil and Gas connections gets really pricey. There's a company out of Houston named Gage-maker, Houston precision (super creative name). They build a device that uses thread specific attachments and a machine to qualify them. It does internal and external threads. I couldn't swear they build the rollers for WJ threads but it might be worth a call. This set-up was about 10k 15 or so years ago, so it's probably a Million today.
If your bread and butter is actually Oil and Gas it's an easy expense to justify. But only then IMO.
R
If your bread and butter is actually Oil and Gas it's an easy expense to justify. But only then IMO.
R
Herding Cats
Hardplates
Pretty sure edge precision youtube channel has some vids using these tools
"...while lawyers clean up small details"
This got me thinking. It's been a while since I did tons of this type of work, but when I did....I cut a million miles of O&G threads. And I made a ton of gages. I'll try and be coherent.
If you bought two different AWJ Pins, different sizes I mean. You could do a comparison of the 6 basic features of a tapered thread. Angle, Vanishing thread, Nominal pipe OD, Pitch, length of engagement and Pitch diameter. And determine from those factors ALL the appropriate dimensions for all the sizes. The pitch diameter is the reason it's difficult to inspect without gages obviously, but it's also difficult to extrapolate and reverse engineer the part. But not impossible. An optical comparator can get you very close, based on following the pitch line and a little trial and error. Theoretically all you need to do is match these purchased parts to the parts you're building at the comparator. I've hand made some 60° points for caliper jaws that follow the angle, I've used different sized gage pins to inspect the P.D. I've even used ball bearings and grease for the Box.
R
If you bought two different AWJ Pins, different sizes I mean. You could do a comparison of the 6 basic features of a tapered thread. Angle, Vanishing thread, Nominal pipe OD, Pitch, length of engagement and Pitch diameter. And determine from those factors ALL the appropriate dimensions for all the sizes. The pitch diameter is the reason it's difficult to inspect without gages obviously, but it's also difficult to extrapolate and reverse engineer the part. But not impossible. An optical comparator can get you very close, based on following the pitch line and a little trial and error. Theoretically all you need to do is match these purchased parts to the parts you're building at the comparator. I've hand made some 60° points for caliper jaws that follow the angle, I've used different sized gage pins to inspect the P.D. I've even used ball bearings and grease for the Box.
R
Spruewell
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I’ve put the sample up on my comparator already to measure it out and generate models and prints. I was looking to find technical data or (affordable) gages in order to verify the samples I have are good. The customer gave me the sample along with tales of woe about the shop he had producing them before. I would hope that he would provide me with good samples, but any information I can find to confirm it will help