Downhole Magnet Housing Material
Downhole Magnet Housing Material
(OP)
I am searching for a non magnetic stainless steel for a magnet housing to be run in an oil well. I would like a material with 80 ksi min yield strength if possible. I was considering a 300 series stainless but many do not have published yield strengths. This is a very simple design utilizing a cylindrical Samarium Cobalt magnet (encased in a stainless housing)used to pick up loose debris in a wellbore. Any suggestions would be appreciated.
RE: Downhole Magnet Housing Material
Size range of the particles you want to pick up?
Do you want to know when the magnet is fully covered ?
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RE: Downhole Magnet Housing Material
It is anyway not clear why you would ask for such a high yield, that is quite out of reach for stainless steels in welded construction, but can be attained with bolting materials.
prex
http://www.xcalcs.com : Online tools for structural design
http://www.megamag.it : Magnetic brakes for fun rides
http://www.levitans.com : Air bearing pads
RE: Downhole Magnet Housing Material
prex-The bottom of the housing will be approx 1/16" thick (air gap basically). The strength is for a threaded connection on top used to connect this tool to other downhole tools. There is no welding necessary on this tool.
RE: Downhole Magnet Housing Material
Also Ni superalloys are good candidates, but there too cold working (with size limitations) would be necessary to reach that yield.
Titanium alloys are also an alternative to be considered.
prex
http://www.xcalcs.com : Online tools for structural design
http://www.megamag.it : Magnetic brakes for fun rides
http://www.levitans.com : Air bearing pads
RE: Downhole Magnet Housing Material
My first thought is 21-6-9. This is an austenitic grade that commonly make in tubing and we cold draw it to high strength. However this would have to be custom made for you.
Since you don't need a lot of material it may end up being availability that drives your selection.
The aircraft industry uses a lot of light wall 625 tubing. This would give you all of the strength and corrosion resistance that you could want, and it might be available from one of the specialty distributors (like TW or Future).
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RE: Downhole Magnet Housing Material