07109 Comparing Hydrogen Permeation Rates, Corrosion Rates, and Sulfide Stress Cracking Resistance for C-110 and P-110 Casing Steel

Available for download

Product Number: 51300-07109-SG

ISBN: 07109 2007 CP

Author: Jonathan Marsh

Publication Date: 2007

Industry: Oil and Gas Production

Member Price: $0.00

Non Member Price: $20.00

Price: $20.00

Qty:

As offshore oil production moves to ever deeper waters, there is an increasing need for sulfide stress cracking (SSC) resistant low alloy steel well casing materials with higher strength than those presently used. Over recent years one area of study has been the development of higher strength C- type low alloy steels for use in slight to moderately sour conditions. One emphasis has been on producing Csteel in the 100-125 ksi strength range, beyond the strength of the C-90 and T-95 type materials that have been traditionally used. As part of a High Pressure-High Temperature (HPHT) casing selection program, experiments comparing hydrogen permeation and corrosion rates were performed. This publication documents the experiments and results, and provides a tentative interpretation with respect to the performance of the P-110 and C-110 casing steels examined. The techniques used were electrochemical corrosion measurements using the linear polarization resistance (LPR) technique, and the hydrogen permeation rate as measured by the hydrogen flux through the steel. Hydrogen permeation measurements were performed on the rear side of the C-110 and P-110 steel test coupons. Simultaneously, corrosion measurements were performed on the front face of the coupons, exposed to the H2S containing environments.