... behavior of those grade is also discussed in this paper. The results were summarized in a sour service domain map and compared with previous published data. The results showed the applicability of this alloy for selected gas well conditions.. 17%Cr OCTG CO₂ H₂S SSC INTRODUCTION...

... on the Prior Austenite Grain Size (PAGS) refinement for several quenching and tempering cycles and additionally on the role of Nb on the critical stress intensity factor for sulfide stress cracking (K_ISSC). A common Cr-Mo high strength OCTG steel alloyed with three different Nb contents ranging from...

...Abstract Many Oil & Gas fields are sour with H₂S partial pressures above 0.05 psi. For such situations, it is critical to employ OCTG qualified for sour service, resistant to SSC. As corrosion processes in acidic environments with dissolved H₂S make the testing solution...

...Testing Approach and Details C110 OCTG material both with and without mill scale was subjected to electrochemical measurements while exposed to a single exposure environment. Material C110 is a Cr-Mo type OCTG with a quenched and tempered martensitic microstructure; a single C110 material heat...

...Table 1 Test Matrix for C110 FFP OCTG Exposures per NACE Paper No. 04109 ² OCTG Stress Temp. Duration Solution Initial PH pH₂S Purge Gas C110 80% SMYS 73° F 23°C 720 hrs 5 wt% NaCl 4 g/L Sodium Acetate 3.7 0.0275 bara (0.40 psia) 2.75% H2S...

...OCTG CO₂ corrosion Hydrogen embrittlement Underground gas storage INTRODUCTION Abstract In China, some underground gas storages (UGS) would be built to reserve the gaseous coal gas (CO, H₂, CO₂, H₂O, etc.). Gaseous hydrogen induced hydrogen...

...Abstract This paper deals with Environmentally-Assisted Cracking (EAC) resistance data, that is, SSC and SCC resistance for martensite-based stainless steel OCTG materials of (1)Modified-13Cr (13Cr-5Ni-2Mo: generic classification of Super-13Cr), (2)15Cr (15Cr-6Ni-3Mo-Cu: UNS No.S42625) and (3)17Cr...

...Abstract Exposure temperature has a known effect on sulfide stress cracking (SSC) in low alloy steels where elevated temperatures permit the use of oil country tubular goods (OCTG) in sour conditions that would not be survivable at lower temperatures. In order to assess SSC susceptibility, NACE...

...) on a six-roll cold straightening process, it was found that seamless oil country tubular goods (OCTG) pipe has a unique residual stresses pattern due to its manufacturing process. An X-Ray diffraction through wall residual stress measurement shows that even with hot straightening, there is still...

...Abstract High strength steels with yield strength greater than 965 MPa (140 ksi) typically used as oil country tubular goods (OCTG) have very limited use in marginally sour wells. Currently, NACE ⁽¹⁾ MR0175 / ISO ⁽²⁾ 15156-2 ¹ provides caution on the use...

...INTRODUCTION Sandvik Sanicro 28 ⁽³⁾ (UNS N08028) and Sanicro 29 ⁽⁴⁾ (UNS N08029) belong to solid-solution nickel-based alloys. Tube products in these material grades have been successfully used in oil country tubular goods (OCTG) applications. Earlier studies have shown...

... of low chromium content alloys. The study concentrates upon alloys with up to 1% Cr. Techniques used include static and dynamic tests monitored by electrochemical methods such as linear polarisation resistance (LPR) and electrochemical impedance spectroscopy (EIS). 1%Cr OCTG inhibition L80...

... conducted and their results, including material properties and a discussion of the well mechanical design and production details. Abstract API⁽¹⁾ 5CT Grade L80, type 1 oil country tubular goods (OCTG), e.g. production tubing & casing, in non-sour, natural gas wells in East Texas failed after...

... steel sour service stress corrosion cracking OCTG downhole testing INTRODUCTION When selecting materials for subsea and downhole applications it is important to consider materials that have sufficient strength and corrosion resistance in the environment they will be exposed to. Duplex materials...

... corrosive conditions (and thus higher alloyed at increasing costs) are 13Cr, super 13Cr, 22Cr duplex, 25Cr duplex and nickel-base alloys. To fill the gap between super 13Cr and 22Cr duplex, a new alloy has recently been introduced: 17Cr stainless steel OCTG. ^{1 , 2} As compared to super 13Cr...

... specimens at mid-width were taken, an example is shown in Figure 3 . For all the studied process conditions of EDM machining, EDM notch was located at the middle of DCB slot, perpendicular to DCB arms. Geometry of EDM slot and notch by optical microscopy (at mid-thickness) is depicted in Table 4 . OCTG...

...The materials selection module, which is by far the most important module of the system, deals with materials selection for OCTG, downhole equipment and wellhead and christmas tree components. Sour service requirements, laboratory testing and temporary operations are also addressed. The last two...

... Country Tubular Goods (OCTG) is a major concern in the oil and gas industry. The severity of corrosion depends on temperature, CO₂ partial pressure, and material characteristics. In this paper, the effects of temperature and chromium content in OCTG steel on CO₂ corrosion...

... in the alloys. ^{22 - 24} Abstract Modern, high-strength martensitic stainless steel (MSS) oil country tubular goods (OCTG) including modified 13Cr (95, 110 and 115 grades) and UNS S42500 (125 ksi grade) are frequently considered as possible replacements to conventional 13Cr steel and duplex stainless...

...Abstract Enhanced corrosion-resistant 17Cr stainless OCTG (17Cr-4Ni-2.5Mo-1Cu-1W-lowC) is discussed in terms of sweet and sweet-sour environments in comparison with martensitic stainless UNS No.S42000 (13Cr-0.20C), modified-13Cr (13Cr-5Ni-2Mo-lowC), UNS No.S42625 (15Cr-6Ni-2Mo-1Cu-lowC) and duplex...