Fit For Service Qualification for Sour Service High Strength Production Casing For High Temperature

2021 ◽  
Author(s):  
Luciana I. L Lima ◽  
Christelle Gomes ◽  
Carine Landier ◽  
Marilia Lima ◽  
Kevin Schleiss ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Yield Strength ◽  
High Strength ◽  
Materials Selection ◽  
Well Production ◽  
Stress Cracking ◽  
Sulfide Stress ◽  
Sulfide Stress Cracking ◽  
Sour Service ◽  
Minimum Yield

Abstract In recent years the application of high strength carbon steel with 125ksi specified minimum yield strength as a production casing in deepwater and high-pressure reservoirs has increased. Sulfide stress cracking (SSC) can develop when high strength carbon steel is exposed to a sour environment. The H2S partial pressure in these sour reservoirs is above the 0.03 bar limit for this material at room temperature. Materials SSC performance evaluation requires an accurate simulation of field conditions in the laboratory. To evaluate the production casing SSC behavior, some fit for service (FFS) tests were carried out considering the well geothermic temperature profile for the materials selection. This paper presents a fit for service qualification carried out on Casing 125 ksi SMYS (Specified Minimum Yield Strength) materials. Two products with 125ksi SMYS were considered: one that has existed for several years and one developed more recently with a better SSC resistance – above the pH2S limit considered for the standard 125ksi SMYS material. The results obtained in this test program allowed casing 125 ksi SMYS materials selection for temperature above 65°C and environment more severe in terms of pH2S than the domain previously established for this grade. This allowed a new well production design, which saves one casing phase and avoids the necessity to use intermediate liners to prevent collapse.

Full Ring Evaluation of X70 Grade UOE Line Pipes for Sour Service

2012 ◽  
Author(s):  
Kenji Kobayashi ◽  
Tomohiko Omura ◽  
Masahiko Hamada ◽  
Hiroyuki Nagayama ◽  
Izuru Minato ◽  
...  
Keyword(s):  
Large Diameter ◽  
High Strength ◽  
Casting Process ◽  
Ring Test ◽  
Past Performance ◽  
Stress Cracking ◽  
Hydrogen Induced Cracking ◽  
Sulfide Stress ◽  
Sulfide Stress Cracking ◽  
Sour Service

High-strength large-diameter UOE line pipes over X70 grade are difficult to apply to actual fields, including H2S, because of a deterioration of sour resistance and a lack of past performance. However, API X70 grade large-diameter UOE line pipes for sour service have been manufactured stably by optimizing the continuous casting process, controlling the shape of inclusions and decreasing coarse precipitates. A full-ring test can simulate fairly well the actual applied conditions of line pipes and evaluate hydrogen induced cracking (HIC), sulfide stress cracking (SSC) and stress oriented hydrogen induced cracking (SOHIC) of line pipes for sour service simultaneously. It was confirmed that the X70 grade UOE line pipes have a good sour resistance from standard HIC tests, four-point bent beam SSC tests and the full-ring test including a seam weld under severe sour conditions (NACE solution A with 0.1 MPa H2S). In addition, the SSC resistance of a girth welded portion was also investigated by using simulated HAZ.

VALLOUREC VM 85 13Cr

Alloy Digest ◽  
2016 ◽  
Vol 65 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Yield Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Alloy Carbon ◽  
Sour Service ◽  
Minimum Yield

Abstract Vallourec VM 85 13Cr (minimum yield strength 85 ksi, or 586 MPa) is a low alloy carbon steel for use in oil country tubular goods as a material suitable for sour service. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming. Filing Code: CS-198. Producer or source: Vallourec USA Corporation.

VALLOUREC VM 90 13CR

Alloy Digest ◽  
2016 ◽  
Vol 65 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Yield Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Alloy Carbon ◽  
Sour Service ◽  
Minimum Yield

Abstract Vallourec VM 90 13CR (minimum yield strength 90 ksi, or 620 MPa) is a low alloy carbon steel for use in oil country tubular goods as a material suitable for sour service. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming. Filing Code: CS-197. Producer or source: Vallourec USA Corporation.

SUMITOMO SMC276-110

Alloy Digest ◽  
2017 ◽  
Vol 66 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Yield Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Sour Service ◽  
Minimum Yield

Abstract Sumitomo SMC276-110 (minimum yield strength of 110 ksi, or 758 MPa) is an austenitic high-strength nickel alloy for use in oil country tubular goods as a material suitable for severe sour service. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming and heat treating. Filing Code: Ni-730. Producer or source: Nippon Steel and Sumitomo Metal Corporation.

scholarly journals Comparison of 2507 Duplex and 28 % Cr- Austenitic Stainless Steel Corrosion Behavior for High Pressure and High Temperature (HPHT) in Sour Service Condition with C-ring Experiment

2021 ◽  
Author(s):  
Harris Prabowo ◽  
Badrul Munir ◽  
Yudha Pratesa ◽  
Johny W. Soedarsono
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Corrosion Behavior ◽  
Material Selection ◽  
Stress Cracking ◽  
Sulfide Stress ◽  
Sulfide Stress Cracking ◽  
Sour Service

The scarcity of oil and gas resources made High Pressure and High Temperature (HPHT) reservoir attractive to be developed. The sour service environment gives an additional factor in material selection for HPHT reservoir. Austenitic 28 Cr and super duplex stainless steel 2507 (SS 2507) are proposed to be a potential materials candidate for such conditions. C-ring tests were performed to investigate their corrosion behavior, specifically sulfide stress cracking (SSC) and sulfide stress cracking susceptibility. The C-ring tests were done under 2.55 % H2S (31.48 psia) and 50 % CO2 (617.25 psia). The testing was done in static environment conditions. Regardless of good SSC resistance for both materials, different pitting resistance is seen in both materials. The pitting resistance did not follow the general Pitting Resistance Equivalent Number (PREN), since SS 2507 super duplex (PREN > 40) has more pitting density than 28 Cr austenitic stainless steel (PREN < 40). SS 2507 super duplex pit shape tends to be larger but shallower than 28 Cr austenitic stainless steel. 28 Cr austenitic stainless steel has a smaller pit density, yet deeper and isolated.

High-Strength Steels with Improved Sulfide Stress Cracking Resistance

CORROSION ◽  
1986 ◽  
Vol 42 (1) ◽  
pp. 54-61 ◽  
Author(s):  
A. Chavane ◽  
M. Habashi ◽  
G. M. Pressouyre ◽  
J. Galland
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Cracking Resistance ◽  
Stress Cracking ◽  
Sulfide Stress ◽  
Sulfide Stress Cracking

scholarly journals Improved High-Pressure, High-Temperature (HPHT) Materials Qualification using Dissolved H<sub>2</sub>S Concentration as the Sour Service Scalable Metric

CORROSION ◽  
10.5006/3867 ◽  
2021 ◽  
Author(s):  
BRENT SHERAR ◽  
Peter Ellis II ◽  
Jing Ning
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Gas Phase ◽  
Stress Cracking ◽  
High Pressure High Temperature ◽  
Sulfide Stress ◽  
Sulfide Stress Cracking ◽  
Sour Service ◽  
The Relationship ◽  
Severity Parameter

Gas phase H&lt;sub&gt;2&lt;/sub&gt;S partial pressure (P&lt;sub&gt;H2S&lt;/sub&gt;) is associated with sulfide stress cracking (SSC) and is routinely used as the ‘scalable’ parameter to qualify materials for high-pressure, high-temperature (HPHT) wells. Candidate materials for HPHT wells routinely require ANSI/NACE MR0175/ISO 15156 compliance because a few mole ppm of H&lt;sub&gt;2&lt;/sub&gt;S at high pressure may place the well beyond the 0.05 psia (0.3 kPa) sour service threshold. P&lt;sub&gt;H2S&lt;/sub&gt; has been accepted historically as the scalable sour severity parameter. However, as the total pressure increases, the relationship between P&lt;sub&gt;H2S&lt;/sub&gt; and the dissolved H&lt;sub&gt;2&lt;/sub&gt;S concentration becomes non-linear. This limits the robustness of P&lt;sub&gt;H2S&lt;/sub&gt; as the sour severity metric. Thus, ISO 15156-1:2020 now permits the use of H2S fugacity (f&lt;sub&gt;H2S&lt;/sub&gt;), H&lt;sub&gt;2&lt;/sub&gt;S activity (a&lt;sub&gt;H2S&lt;/sub&gt;), and H&lt;sub&gt;2&lt;/sub&gt;S aqueous concentration (C&lt;sub&gt;H2S&lt;/sub&gt;) as alternatives for sour testing. This recent revision is based on evidence that f&lt;sub&gt;H2S&lt;/sub&gt; and C&lt;sub&gt;H2S&lt;/sub&gt; each provide better correlations to SSC at elevated total pressures than P&lt;sub&gt;H2S&lt;/sub&gt;. This paper will address the merits and challenges of using f&lt;sub&gt;H2S&lt;/sub&gt; or C&lt;sub&gt;H2S&lt;/sub&gt; to define sour severity: We argue that C&lt;sub&gt;H2S&lt;/sub&gt; is a practical, experimentally verifiable approach, which can be used to validate ionic-equation of state (EOS) frameworks used to characterize mildly sour HPHT environments.

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