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51316-7126-Qualification of Super 13Cr-110 in HPHT Sour Well Service with Concentrated Brines

A corrosion cracking assessment evaluated a 13Cr-5Ni-2Mo 110 ksi grade martensitic stainless steel as a potential well tubing material for oil and gas production from Gulf of Mexico reservoirs. Also, Stress Corrosion Cracking at low H2S/low temp/high acidity (pH<3.5) was tested by  Cyclic Slow Strain Rate. 

Product Number: 51316-7126-SG
ISBN: 7126 2016 CP
Author: Fengmei Song
Publication Date: 2016
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$20.00
$20.00

A fitness for purpose corrosion cracking assessment was performed to evaluate the suitability of a 13Cr-5Ni-2Mo 110 ksi grade martensitic stainless steel as a potential well tubing material for oil and gas production from Gulf of Mexico reservoirs. Conditions were chosen to reflect those expected in producer wells including the possible presence of H2S as a result of reservoir souring due to seawater flooding. A detailed analysis of existing martensitic stainless steel test data for SSC and SCC revealed the need for a qualification test program to fully cover the conditions identified.Both static (Creviced C-ring) and dynamic Cyclic Slow Strain Rate (CSSR) testing for assessing SCC resistance were undertaken in concentrated brine at 200°F (93°C). In addition SSC at low H2S and low temperature with high acidity (pH<3.5) was tested employing CSSR. The test program and the results obtained are detailed and compared against existing data thereby further defining the safe operating envelop for SCC and SSC of 13Cr-5Ni-2Mo 110 ksi grade martensitic stainless steels in additional environments that are outside of current experience.

Key words: downloadable, 13Cr, C-ring test, SCC, SSC,cyclic slow strain rate, sour service

A fitness for purpose corrosion cracking assessment was performed to evaluate the suitability of a 13Cr-5Ni-2Mo 110 ksi grade martensitic stainless steel as a potential well tubing material for oil and gas production from Gulf of Mexico reservoirs. Conditions were chosen to reflect those expected in producer wells including the possible presence of H2S as a result of reservoir souring due to seawater flooding. A detailed analysis of existing martensitic stainless steel test data for SSC and SCC revealed the need for a qualification test program to fully cover the conditions identified.Both static (Creviced C-ring) and dynamic Cyclic Slow Strain Rate (CSSR) testing for assessing SCC resistance were undertaken in concentrated brine at 200°F (93°C). In addition SSC at low H2S and low temperature with high acidity (pH<3.5) was tested employing CSSR. The test program and the results obtained are detailed and compared against existing data thereby further defining the safe operating envelop for SCC and SSC of 13Cr-5Ni-2Mo 110 ksi grade martensitic stainless steels in additional environments that are outside of current experience.

Key words: downloadable, 13Cr, C-ring test, SCC, SSC,cyclic slow strain rate, sour service

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Picture for Effect of Stress Level on the SCC Behavior of 13Cr Steel during HT Exposure to Formate Brines
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51316-7613-Effect of Stress Level on the SCC Behavior of 13Cr Steel during HT Exposure to Formate Brines

Product Number: 51316-7613-SG
ISBN: 7613 2016 CP
Author: Siv Howard
Publication Date: 2016
$20.00