×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Materials Capable of Withstanding 420,000 PPM H2S

Materials Capable of Withstanding 420,000 PPM H2S

Materials Capable of Withstanding 420,000 PPM H2S

(OP)
Any recommendations of high strength (90 ksi or so) materials capable of withstanding 420,000 PPM (42 %) H2S and 8 % CO2 at 400 degrees F (bottom hole temperature) at 17,000 psi pressure (bottom hole pressure) for an oilfield downhole application? We typically use 4140 HT or 17-4 PH stainless at H900 condition for our downhole tools, but these will become hydrogen embrittled. Thanks in advance for any ideas!

RE: Materials Capable of Withstanding 420,000 PPM H2S

A cold worked "C" type alloy (C-22, 59, 686) is about the only option that I have seen used in this type of service.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: Materials Capable of Withstanding 420,000 PPM H2S

Multiphase alloys like MP35N are used in down hole applications.

Regards,

Cory

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.

RE: Materials Capable of Withstanding 420,000 PPM H2S

The tools will only become hydrogen embrittled if there is a chemical reaction to generate hydrogen upon their surfaces.  At those pressures and temperatures, what reaction will generate hydrogen?

The first question to ask is: will these tools see any liquid water?  The second is: are there any chlorides around?  The third is: any elemental sulphur?

Armed with that knowledge, one can then look at ISO 15156.

Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/

RE: Materials Capable of Withstanding 420,000 PPM H2S

If the gas is supersaturated and free water around, then an Inconel could be used. The Lost Cabin Field has had papers on the metalurgy used there with 25,000 foot wells producing 50% H2S gas.

RE: Materials Capable of Withstanding 420,000 PPM H2S

We have had sucess with Inconel 625 that had a minimum specified yield strength of 80ksi. Hardness was still below the max specified in ISO15156. The well was approx 10.000psi, 18% H2S, 150deg C. Do not know the amount of chlorides and CO2, but I know these elements were present.

The "C" alloys are probably not strong enough. Age-hardening of Inconel 625 is one option you can try out.

RE: Materials Capable of Withstanding 420,000 PPM H2S

?HIC-resistant steels can be used to minimize the susceptibility to blistering and HIC damage by H2S.

Detailed materials and fabrication guidance can be found in NACE Publication 8X194.


Regards

luis marques

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources