..., were used in this study. Ultra-high strength low alloy steel sour environments corrosion fatigue INTRODUCTION Literature data indicate that approximately 20% of the drill pipe failures are caused by corrosion fatigue. ¹ With the application of balanced pressure drilling technology...

... because the time to steady state increases with the increase in the load. Fatigue crack growth rate hydrogen diffusion sour environments frequency ΔK INTRODUCTION Fatigue crack growth rate (FCGR) for low strength alloys in sour environment can be as high as 50 times compared to those in the air...

... and corrosion resistance of mechanical tubes are also presented. This data on SSRT is compared with other high strength alloys. In addition, SSRT data and C-ring data of precipitation strengthened alloys is compared in the same environmental conditions. Ni-based Alloy 945X sour environments precipitation...

..., particularly in sour environment. This paper focuses on investigating the effect of the above mentioned variables and several other critical variables that affect FCGR in a range of sour environments. In H₂S environments, the formation of FeS leads non-uniform hydrogen concentration through...

... cracks closer to the surface will likely have a higher concentration of hydrogen than deeper cracks. ¹⁷ The results obtained at constant ΔK and at 0.1Hz in sour environments indicated a decreasing FCGR with increasing depth again suggesting that the bulk hydrogen plays a very important role...

... availability. In addition to general alloy characteristics, this paper will present development of a 140 ksi min yield strength derivative of alloy 945. Capability of the alloy to produce pump shaft products for 165 ksi min and 210 ksi min yield strength will also be presented Ni-based Alloy 945 sour...

... Clock - T-side 25C Sour Environment Frequency Scan 12 Weld Metal Centerline GMAW 9O Clock - T-side 60C Sour Environment Frequency Scan 13 Pipe HAZ GMAW 9O Clock - T-side 25C Sour Environment Frequency Scan 14 Pipe HAZ GMAW 9O Clock - T-side 60C Sour Environment Frequency...

.... This paper will illustrate alloy development methodology, heat treatment to obtain the target properties, mechanical properties, microstructure, and corrosion properties. Ni-based Alloy 945 sour environments precipitation hardenable high strength INTRODUCTION Material selection is especially critical...

... nickel-based completion equipment sour environments service tools precipitation hardenable INTRODUCTION The impetus for this alloy development work was a need to create a lower cost material to fill a gap that exists between martensitic/supermartensitic alloys (13Cr / Super 13Cr and 17-4PH...

...nickel-base alloys sour environments corrosion resistance oil country tubular goods (OCTG) age-hardened tube mechanical tube oil field INTRODUCTION Natural gas still remains one of the world’s most abundant sources of energy. In the past, drilling and production tubulars were only steel...

... service is presented. Many commercially significant alloys are ranked as to corrosion resistance up to 230°C (450°F) depending on the chloride concentration and H₂S content. nickel-base alloys sour environments corrosion resistance oil country tubular goods age-hardened tube mechanical...

.... 17-4Ph stainless steel containers sour environments sample bottles well test INTRODUCTON Downhole testing tools are typically run in exploratory wells to perform dynamic reservoir characterization. The downhole testing tool string and its components will form the bottom hole assembly...

... methods. Alloys 725 and 725HS are also shown to be suitable candidate materials in severely corrosive high temperature oil patch environments. Sour environments in which alloys 725 and 725HS have met the criteria for corrosion resistance are defined with and without free sulfur. nickel-base alloys sour...

... demonstrated corrosion resistance up to 230°C (450°F) depending on the chloride concentration, and H₂S content. Data are also included for alloy 686 (UNS N06686) and alloys 725 weld overlays and for alloy 25-6MO (UNS N08926) wire lines. nickel-base alloys sour environments corrosion resistance...

..., primarily of nickel, chromium and molybdenum, provide the required corrosion resistance and a cost effective alloy selection. This paper examines five nickel alloys used extensively in hot, sour environments as Oil Country Tubular Goods (OCTG) and rates them in accordance to their corrosion resistance...

... scratching and immediately started to decrease and finally returned to the value before scratching in both sweet and sour environments. Therefore, an increase in galvanic corrosion rate by scratching is negligible small for the long term and localized corrosion due to mechanical scratching does not occurrs...

.... sulfide stress cracking hydrogen induced cracking hydrogen sulfide predictive calculations sour environments modeling INTRODUCTION Sulfide stress cracking (SSC) and hydrogen induced cracking (HIC) in wet H₂S environments are common and costly failure modes for carbon steel equipment...

... mechanical properties (91.5 ksi actual yield strength). According to these results, 13% Cr could be used in more agressive environments. General corrosion Martensitic 13% Cr Sour environments Sulfide Stress Cracking Stress Corrosion Cracking Carbon dioxide Hydrogen sulfide Laboratory tests...

... Abstract This paper presents results of corrosion and environmental cracking testing of 13 Cr stainless steels in slightly sour environments and provides guidelines for justifying 13 Cr for sour services. The purpose of this paper was to con- firm/refute the service limits suggested by manufacturers...