Name that thread!

[Jeremy_Goss]

Let's take "NAME THAT THREAD" for 1000, please!

Guys, just curious: has anyone seen this thread profile before??? I reverse engineered it, but just curious if anyone has experience with this thread? 2" TPF, 2 TPI. Application is a casing hanger (API 6A)

 

[gmoushon]

Buttress Thread.

Buttress thread - Wikipedia

gm.

 

[Jeremy_Goss]

Buttress Thread.

Buttress thread - Wikipedia

gm.

Thanks for the quick response! It does look like it, however if you notice the attachments carefully, you'll see the angle of the load flank (rear flank) goes in the opposite direction as a normal buttress would. ASME Buttress calls out 45/7 on its standard most common connection; this is 35 instead of 45 and 7 degrees aimed toward the face of the part. In other words, if a line was drawn perpendicular to the thread crests or roots which are parallel to the taper cone, both the lead and load angles would be on the same side of the imaginary line). If this is just a super modified buttress, then i guess i have to live with that answer All additional insight is appreciated.

 

[Jeremy_Goss]

Also, notice thread height - less than half of normal Buttress.....

 

[Limy Sami]

Buttress is the generic term, while the data posted suggests a specialist oil field / patch thread, …..many of which are special if not outright proprietry and can only be cut under licence (which is usually BIG$$$$)

 

[4GSR]

That's proprietary to the casing hanger manufacture. There's lots of those threads like that used on down hole oilfield equipment including casing and tubing. Most of the threading inserts made to cut those threads are ground by Tool-Flo in Houston. Your local cutting tool distributor should be able to get them for you if you can provide a drawing of the thread detail to them. Ken

Edit: That's a premium thread connection for casing. I'm not up to snuff on premium casing threads being used that are out there today. If that is something that is going out in the Gulf of Mexico, you better get it cut by a certified shop that has the gages for checking that thread to make sure it is correct. Lots of liability there if it fails and cost lives due to a improperly cut thread.

 

[Jeremy_Goss]

Yessir, I believe in doing it the right way - that's for sure. I really appreciate all the help guys (and gals?)

I worked with a proprietary connection before in a different API 5B machine shop that was licensed to cut it, where the thread was a modified API BTC, so i do have a little understanding of the licensing world (enough to confirm the statement Limy Sami made about $$$$$$!!!!!)

 

[thermite]

If that is something that is going out in the Gulf of Mexico, you better get it cut by a certified shop that has the gages for checking that thread to make sure it is correct ^^^ and introduces no stress risers ^^^. Lots of liability there if it fails and cost lives due to a improperly cut thread.

Thanks. Well worth repeating.

Think it through folks. Everything about oil & gas exploration and development is high-risk, high stress.

Any idea how heavy a drill string gets, just as "static" mass, deep as those holes have to go?

And then it has to do "work" - sometimes in a curve - not just hang there, idle, as if it were in a museum-case?

The merely difficult was done long ago. These folk have been into what was once considered downright impossible for quite a while, already.

Tip o'the hat. Takes a lot of good folks working hard and working smart to keep our fuels affordable.

 

[4GSR]

Thermite,

Got to correct you there. Casing hanger has nothing to do with the drill string. It's what holds up all of that casing (pipe) that lines the well after it is drilled. Could be talking about at least an million pounds of weight hanging off the casing hanger. Then throw in the hydrostatic pressures and fluids down hole, well, could be more. Offshore, this would be at the bottom of the ocean attached to the well head. Or I should say, the well head part of the casing hanger. Then comes the BOP stack. And so on. Ken

 

[thermite]

Thermite,

Got to correct you there. Casing hanger has nothing to do with the drill string. It's what holds up all of that casing (pipe) that lines the well after it is drilled. Could be talking about at least an million pounds of weight hanging off the casing hanger. Then throw in the hydrostatic pressures and fluids down hole, well, could be more. Offshore, this would be at the bottom of the ocean attached to the well head. Or I should say, the well head part of the casing hanger. Then comes the BOP stack. And so on. Ken

Not really a "correction", Ken, "general" advisory and all, as it were.

All I ever got personal hands-dirty on was smalltime core drilling, summer of 1961. We only "owned" mineral rights to our five gas wells, watched and spectated as they were drilled, fracked, serviced.

Also used the "free" gas allowance and banked the 1/8 share, of course! Some hillbillys are less poor than others..



Rest of the edumacation came from working with the majors on inertial transducers for ocean-floor audio monitoring of flow & c. Bev Morgan, Kirby-Morgan band-mask inventor, took one of my little hand-built gems to an alleged 58,000 PSI before it failed, early 1970's. I was told the test chamber had begun life as a US Navy 16"-50 breech, Iowa class main battery, found a new home for dry-land research use, left coast.

Point being, ALL of this s**t is heavy because it goes so deep, ergo is so damned LONG.

"million pounds", etc. 'coz it has all gotten deeper than once was.

Helluva strain on coupling it. Some just more so than others, none of it easy nor casual as to liability, time, money or well-folks well-being.

Strong folk. Strong suppliers. World-class technology. May it continue thus.


Now I shall go and put trews back on.

Cheerleader's skirt and panty-hose itch, but yah gots to doo what yah gots to doo, settin' on several thousand shares of oil & gas equities that helps pay the bills!!!

 

[steve45]

Thanks. Well worth repeating.

Think it through folks. Everything about oil & gas exploration and development is high-risk, high stress.

Any idea how heavy a drill string gets, just as "static" mass, deep as those holes have to go?

And then it has to do "work" - sometimes in a curve - not just hang there, idle, as if it were in a museum-case?

The merely difficult was done long ago. These folk have been into what was once considered downright impossible for quite a while, already.

Tip o'the hat. Takes a lot of good folks working hard and working smart to keep our fuels affordable.

Having worked in the oil & gas industry for nearly 40 years, I appreciate the kind words for our industry. We get blasted by the environmentalists and politicians relentlessly, and we haven't done a very good job of educating the public on how much work actually goes into making energy available virtually anytime, anywhere.

 

[thermite]

Having worked in the oil & gas industry for nearly 40 years, I appreciate the kind words for our industry. We get blasted by the environmentalists and politicians relentlessly, and we haven't done a very good job of educating the public on how much work actually goes into making energy available virtually anytime, anywhere.

Nor how many families, directly and indirectly earn a crust from it.

And vote.

Metals industry is another. Yah need the product, yah deals with the making of it. TANSTAAFL.

Hose clamps mought be the saviours, though.

Congresscritters git their heads up and locked where the sun shineth not?

Clamp it there, Judge Roy Bean durable-justice-like.

That'll green yah a new deal on "fresh air" versus "transport" priorities..!!!

 

[DDoug]

Name of thread ?

"Soon to be locked" hopefully.....