... Both cold worked materials are typically specified as type 4c and are approved by the NACE MR0175 up to a hardness level of 40 HRC and a maximum yield strength of 150 ksi. stress corrosion cracking (SCC) well conditions corrosion resistant alloys oil country tubular goods N08028 N08825...

... 163 (1124) 173 (1193) 21 71 Abstract Since high strength UNS N07022 alloy was introduced in 2006, it has seen use as bar for both drilling and completions and as Oil Country Tubular Goods for oil patch applications. This paper summarizes the uses and applications for sour service oil patch...

... in the field. Sulfide Stress Cracking SSC Fugacity Sour Wells Oil Country Tubular Goods INTRODUCTION In those situations where fugacity is applicable, it should be noted that temperature can have a significant impact on fugacity values. When assessed in the context of a high pressure well, this impact...

...INTRODUCTION Abstract Oil and gas operations are progressing deeper and into higher pressure formations that require higher strength materials, particularly for oil country tubular goods (OCTG). Concomitant factors in these wells are higher H₂S and CO₂ partial pressures...

... 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...

... stainless steels Stress corrosion cracking H₂S CO₂ CaCl₂ Oil country tubular goods INTRODUCTION Failure Analysis The failure analysis was carried out to use the following cracked tubing and tubing accessories: In recent years, it has been common practice in the oil...

... of CRAs in severe sour environments has been discussed based on the laboratory test results. The concept of the field test by DFT is also explained. Hydrogen Sulfide Oil Country Tubular Goods Material Selection Stress Corrosion Cracking Ni Base Alloy Duplex Stainless Steel INTRODUCTION The corrosion...

... oil country tubular goods age-hardened bar 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 steel only, while stainless steels and nickel alloys were used primarily for valves or instrumentation...

..., 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...

... observations made by the authors over the last few years on the DCB specimen and associated testing methodology. Finally performances of C90 to C110 materials are discussed regarding the acceptance criteria of oil companies and compared with the behaviour in standard tensile test. Oil Country Tubular Goods...

... method A is shown to be inferior as a quality control test to both methods B and D. Both users and manufacturers of Oil Country Tubular Goods could benefit from a reexamination of the basis for such test requirements. Sulfide Cracking Testing Statistics Quality oil country tubular goods pipe...

... (smooth tensile, DCB) have been investigated throughout the wall thickness. The C110 proprietary grade proved to be an excellent material for use as Oil Country Tubular Goods (OCTG) in typical North Sea environments with improved assessment of H2S corrosion resistance properties according to both NACE...

... than that in the static condition. CO₂ corrosion galvanic corrosion oil country tubular goods carbon steel corrosion resistant alloys flow velocity loop tester critical velocity erosion–corrosion INTRODUCTION It is well known that corrosion rate of OCTG or linepipe is greatly...

... of less noble side, galvanic current after scratching decreased gradually. galvanic corrosion oil country tubular goods carbon steel stainless steel mechanical scratch wireline sour environments sweet environments INTRODUCTION In oil and gas wells, the conditions of corrosive environments vary...

.... Furthermore, The role of alloying elements such as Fe, Cr, Ni, Mo and Cu in SCC resistance was discussed from the viewpoint of stability of corrosion product based on the solubility of oxide and sulfide calculated by thermodynamic method. Hydrogen sulfide Oil country tubular goods Stress corrosion cracking...

... for use as Oil Country Tubular Goods (OCTG) in typical North Sea environments (high chloride, high temperature, high CO₂ wells containing H₂S) with improved corrosion resistance properties. Oil Country Tubular Goods Martensitic Steels Supermartensitic Steels Duplex Stainless...

...Abstract Supermartensitic stainless steels, recently made available as oil country tubular goods (OCTG), have been developed as a valuable cost effective alternative to duplex stainless steel for high CO₂, medium/high chlorides, and very low H₂S environments. Experimental...

... 859 galvanic corrosion oil country tubular goods carbon steel stainless steel corrosion rate sour gas CO₂ gas INTRODUCTION Galvanic current and coupled potential were measured using a high pressure and high temperature autoclave. A pressure-balanced outer Ag/AgCl reference electrode...

... resistance. Some new martensitic stainless steel tubing for Oil Country Tubular Goods (OCTG) with improved general and localized corrosion resistance in sweet environments, were developed. Exposure tests in autoclave were carried out in environments typical of the North Sea oil fields containing small...

... adequate tempering temperature. 15% Cr stainless steel Oil country tubular goods CO₂ corrosion resistance Pitting corrosion resistance Type420 Toughness SSC High strength Materials A 5 tons vacuum induction melted ingot of 15% Cr steel was billeted and hot rolled in the mandrel mill...