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McD
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Join Date: Jun 2011
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Design of Steel Tube Coiling Machine

06/10/2011 9:48 AM

I have to design a tube coiling machine for oil well servicing equipment. what should be the approach for designing the same?
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Pathfinder Tags: oil well oil well servicing tube bending tube coiling
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jesw55
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#1

Re: Design of steel tube coiling machine

06/10/2011 9:55 AM

Hi McD,

Inside & Outside diameter of tube, material and length would help to start.

Best regards,

John

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McD
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#2
In reply to #1

Re: Design of steel tube coiling machine

06/10/2011 10:36 AM

Its a 1 1/4" diameter carbon steel tube. length is 15000'

And I am looking to wind it on a drum of 80" diameter.
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jesw55
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#3
In reply to #2

Re: Design of steel tube coiling machine

06/10/2011 10:47 AM

Hi McD,

Sorry I can't help, thought I would ask the obvious questions early so other contributors will have a better idea of what's involved.

It will be SOME MACHINE.

Would love to see what you come up with as a design, it should be enormous!

Hydraulically operated?

I trust the tube will be "beyond repair" after coiling?

Best of luck with your project.

John

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PWSlack
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#4
In reply to #2

Re: Design of steel tube coiling machine

06/10/2011 10:53 AM

Then it wants a dirty-great hydraulic power pack on it....

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McD
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#6
In reply to #4

Re: Design of steel tube coiling machine

06/10/2011 11:12 AM

hmmm... thats true. thanks.

The selection of this drive is my challenge. torque requirement ??

do I use the allowable bending stress. or is there any other determining parameter. Does this require metal forming calculations?

regards
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lyn
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#5

Re: Design of steel tube coiling machine

06/10/2011 10:56 AM

I see a series of grooved wheels, top and bottom that bend the pipe. You may need more than one set to keep the bend gentle enough.

Something along the lines of this, only much more rugged.

Ercolina 3 Roll Benders
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farmatt
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#7

Re: Design of steel tube coiling machine

06/10/2011 11:28 AM

How do they coil tubing for packaging? commercial production of tubing may have an answer for you.

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jesw55
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#8
In reply to #7

Re: Design of steel tube coiling machine

06/10/2011 11:34 AM

Hi farmatt,

I don't think they coil Steel tube 1 1/4" OD.

John

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farmatt
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#9
In reply to #8

Re: Design of steel tube coiling machine

06/10/2011 11:37 AM

what is the wall thickness? I have seen steel pipe coiled for older radiation/cooling systems, I know it has been done.

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jesw55
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#10

Re: Design of steel tube coiling machine

06/10/2011 11:49 AM

Hi McD,

I just thought, "assumption is the mother of all c*ck ups". I assumed you are scrapping the tube?

If not, then I'm a mile out, in my mental picture of what you are trying to achieve with this huge amount of tube.

Is it screwed and socket, welded?

John

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TonyS
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#11

Re: Design of steel tube coiling machine

06/11/2011 7:11 AM

Just as a thought, is this pipe to be used after coiling? I ask because I wonder how you intend to straighten it for further use. It will be stressed once by coiling, a second time by uncoiling and straightening. It will be only be fit for scrap.

Let us know if you manage to do it, I think we'll all be impressed.

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Tornado
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#12

Re: Design of steel tube coiling machine

06/11/2011 5:08 PM

I'm wondering what sort of fluid flow is expected in this nearly 3-mile coil (73.5 feet long if adjacent turns are touching).

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Users who posted comments:

farmatt (2); jesw55 (4); lyn (1); McD (2); PWSlack (1); TonyS (1); Tornado (1)

Previous in Forum: Square Elbow Surface Area Calculation   Next in Forum: Slippery Coating to Cover Section of a Tube.

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