Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

51316-7209-Evaluation of Full Size C110 Premium Casing Connections Fit-for-Purpose Performance in Mildly Sour Environment

Picture for Evaluation of Full Size C110 Premium Casing Connections Fit-for-Purpose Performance in Mildly Sour E
Available for download

The purpose of this paper is to illustrate the possibility of testing full sized connections in sour environments. It is also intended to demonstrate to the industry that the pipe body is possibly more susceptible to cracking than is the premium connection fabricated from the same susceptible material.

Product Number: 51316-7209-SG
ISBN: 7209 2016 CP
Author: Xin Long
Publication Date: 2016
Industry: Pipelines, Tanks, and Underground Systems
$0.00
$20.00
$20.00

 

A laboratory test program was conducted to investigate full size 12 ¼ inch (311mm) OD API C110 grade premium casing connections performance in a mildly sour environment with an ID-only exposure for a fit-for-purpose study. A specially designed and built test fixture was used to conduct internal pressurizing tests of the assembled connection specimens in a controlled mildly sour solution. Two full-sized specimens (one of API C110(1) and one of API Q125) were tested. Finite element analysis (FEA) was conducted to identify high risk locations for sulphide stress cracking (SSC) for the connection specimens.

The API C110 grade premium connection and pipe body passed the test of 722 hours in the sour environment under the effective pressure. Extensive post-test examination showed no evidence of cracks in the full sized API C110 test specimen. The API Q125 grade specimen failed after only 169 hours of exposure. The crack location in the API Q125 specimen was in the pipe body while the connection pin and box were found to be crack-free. This latter result demonstrated that the premium connection is less susceptible to sour cracking than the pipe body. The location of the cracks in the API Q125 specimen agreed with FEA which showed that the highest stress locations (hot spots) are in the pipe body ID near the connection locations under caped end pressure condition.

The purpose of this paper is to illustrate the possibility of testing full sized connections in sour environments. It is also intended to demonstrate to the industry that the pipe body is possibly more susceptible to cracking than is the premium connection fabricated from the same susceptible material.

Keywords: downloadable, Connection, API C110, mildly sour environment, H2S, SSC

 

A laboratory test program was conducted to investigate full size 12 ¼ inch (311mm) OD API C110 grade premium casing connections performance in a mildly sour environment with an ID-only exposure for a fit-for-purpose study. A specially designed and built test fixture was used to conduct internal pressurizing tests of the assembled connection specimens in a controlled mildly sour solution. Two full-sized specimens (one of API C110(1) and one of API Q125) were tested. Finite element analysis (FEA) was conducted to identify high risk locations for sulphide stress cracking (SSC) for the connection specimens.

The API C110 grade premium connection and pipe body passed the test of 722 hours in the sour environment under the effective pressure. Extensive post-test examination showed no evidence of cracks in the full sized API C110 test specimen. The API Q125 grade specimen failed after only 169 hours of exposure. The crack location in the API Q125 specimen was in the pipe body while the connection pin and box were found to be crack-free. This latter result demonstrated that the premium connection is less susceptible to sour cracking than the pipe body. The location of the cracks in the API Q125 specimen agreed with FEA which showed that the highest stress locations (hot spots) are in the pipe body ID near the connection locations under caped end pressure condition.

The purpose of this paper is to illustrate the possibility of testing full sized connections in sour environments. It is also intended to demonstrate to the industry that the pipe body is possibly more susceptible to cracking than is the premium connection fabricated from the same susceptible material.

Keywords: downloadable, Connection, API C110, mildly sour environment, H2S, SSC

Product tags
Also Purchased
Picture for Failure Investigation of a C110 Connection from a High Pressure High Temperature Well
Available for download

51314-3787-Failure Investigation of a C110 Connection from a High Pressure High Temperature Well

Product Number: 51314-3787-SG
ISBN: 3787 2014 CP
Author: David Hillis
Publication Date: 2014
$0.00
Picture for The Effect of Notch Configuration on NACE TM0177 DCB Elastic Compliance and Recommendations for Futu
Available for download

51316-7203-The Effect of Notch Configuration on NACE TM0177 DCB Elastic Compliance and Recommendations for Futu

Product Number: 51316-7203-SG
ISBN: 7203 2016 CP
Author: Karol Szklarz
Publication Date: 2016
$20.00

DCB compliance for the chevron notch 32 mm electric discharge machining (EDM) and 35 mm EDM crack starters were measured and compared. The program consisted of multiple direct load versus arm displacement measurements for all three configurations.
Picture for Documented Evidence of Significant Metal Loss in Aluminum Crevice Corrosion
Available for download

51316-7199-Documented Evidence of Significant Metal Loss in Aluminum Crevice Corrosion

Product Number: 51316-7199-SG
ISBN: 7199 2016 CP
Author: Brian DeForce
Publication Date: 2016
$20.00

The crevice corrosion of aluminum (99.999 wt. %) in neutral and mildly acidic solutions was investigated. Polarization curves were generated in simulated crevice solutions and potentiostatic crevice corrosion experiments with varying crevice gaps were performed.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support