US 11,656,169 B2
Development of control samples to enhance the accuracy of HIC testing
Mohammed Al-Anezi, Dhahran (SA); Khalid Ali Babakri, Dhahran (SA); and Saad Al-Muaili, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Mar. 19, 2021, as Appl. No. 17/207,377.
Prior Publication US 2022/0299425 A1, Sep. 22, 2022
Int. Cl. G01N 17/02 (2006.01); G01N 17/00 (2006.01); E21B 47/117 (2012.01)
CPC G01N 17/02 (2013.01) [G01N 17/006 (2013.01); E21B 47/117 (2020.05)] 13 Claims
OG exemplary drawing
 
1. A method for performing a standardized hydrogen induced cracking (HIC) test on a HIC resistant material for a sour service application, the method comprising: obtaining the HIC resistant material candidate; extracting a test sample from the HIC resistant material candidate; extracting a control sample from a prequalified HIC susceptible material, the prequalified susceptible material being known to suffer predetermined HIC damage when subjected to preset test conditions of a standardized HIC test; performing the standardized HIC test on the test sample and the control sample; calculating a value of a predetermined cracking criteria for the control sample subsequent to the standardized HIC test; determining whether the calculated value of the predetermined cracking criteria for the control sample is at least equal to a predetermined minimum threshold value; calculating respective values of a plurality of predetermined HIC resistance criteria for the test sample subsequent to the standardized HIC test, in response to determining that the calculated value of the predetermined cracking criteria for the control sample is at least equal to the predetermined minimum threshold value; determining whether the calculated respective values of the plurality of predetermined HIC resistance criteria for the test sample are not greater than corresponding predetermined maximum threshold values; and qualifying the HIC resistant material candidate as a valid source for sour service applications in response to determining that the calculated respective values of the plurality of predetermined HIC resistance criteria for the test sample are not greater than the corresponding predetermined maximum threshold values.
 
13. A control sample for verifying accuracy of test conditions during a standardized NACE TM0284 corrosion test on a test sample being qualified for use in sour service applications, wherein the control sample is extracted from a steel alloy composition including, in weight percent: Sulfur>0.01%, Carbon 0.08%-0.20%, Manganese>0.08%, and Copper<0.02%, wherein the control sample is configured to be placed in the same hydrogen induced cracking (HIC) testing vessel as the test sample of an HIC resistant material candidate undergoing the standardized NACE TM0284 corrosion test for qualifying the HIC resistant material candidate as a valid source for use in sour service applications, and wherein the control sample produces a Crack Length Ratio (CLR) of at least 20% when immersed in a corrosive test Solution A or a corrosive test Solution B of the standardized NACE TM0284 corrosion test, and when the control sample and the test sample are subject to the standardized test conditions as defined by the standardized NACE TM0284 corrosion test.