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99601 EFFECTS OF ENVIRONMENTAL CONDITIONS ON SSC RESISTANCE OF C125 OCTG

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Product Number: 51300-99601-SG
ISBN: 99601 1999 CP
Author: H. Asahi and K.Nose
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Demand for high strength casing has increased to develop high pressure and/or deep wells. In order to cope with H2S contained in produced fluid, the high strength casings are often required to be resistant to SSC (Sulfide Stress Cracking). Effects of environmental factors such as H2S partial pressure and pH on SSC resistance of C125 grade OCTG were made clear using some types of SSC tests (tensile, V-notched 4-point bent beam, DC13. compact, tension, SSRT) and a hydrogen permeation test. For hydrogen entry into steel, one unit of pH decline is equivalent to a tenfold rise of H2S partial pressure although the effect of pH becomes lower after long time. SSC resistance of C125 decreases with increasing ppH2S and decreasing pH and is very high at H2S partial pressure of 0.001 MPa or lower and high at 0.01 MPa in case of bigher PH. Keywords : sulfide stress cracking, sour gas OCTG, casing, high strength steel. hydrogen embrittlernent
Demand for high strength casing has increased to develop high pressure and/or deep wells. In order to cope with H2S contained in produced fluid, the high strength casings are often required to be resistant to SSC (Sulfide Stress Cracking). Effects of environmental factors such as H2S partial pressure and pH on SSC resistance of C125 grade OCTG were made clear using some types of SSC tests (tensile, V-notched 4-point bent beam, DC13. compact, tension, SSRT) and a hydrogen permeation test. For hydrogen entry into steel, one unit of pH decline is equivalent to a tenfold rise of H2S partial pressure although the effect of pH becomes lower after long time. SSC resistance of C125 decreases with increasing ppH2S and decreasing pH and is very high at H2S partial pressure of 0.001 MPa or lower and high at 0.01 MPa in case of bigher PH. Keywords : sulfide stress cracking, sour gas OCTG, casing, high strength steel. hydrogen embrittlernent
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Picture for 08115 Development of a C125 High Strength Low Alloy Steel for OCTG: SSC Mapping in Slightly Sour Environment
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08115 Development of a C125 High Strength Low Alloy Steel for OCTG: SSC Mapping in Slightly Sour Environment

Product Number: 51300-08115-SG
ISBN: 08115 2008 CP
Author: Hervé Marchebois / Michel Piette / Laurent Ladeuille / David Senegas-Rouviere /Christoph Bosch / Josef Pleschiutschnig / Jean Leyer / Bertine Orlans-Joliet / Etienne Lepine / Frédéric Legay / Cédric Linne / Alfredo Figueiredo
Publication Date: 2008
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Today a need for a C125 Sulfide Stress Cracking (SSC) resistant material exists with the development of High Pressure/High Temperature (HP/HT) oil and gas fields.  This paper focuses on the SS resistance of industrial heats.
Picture for The Study on Residual Stresses in OCTG and Its Effect on Pipe Sour Cracking (SSC) Performances
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51318-10919-The Study on Residual Stresses in OCTG and Its Effect on Pipe Sour Cracking (SSC) Performances

Product Number: 51318-10919-SG
Author: Xin Long / Pete W. Moore
Publication Date: 2018
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X-Ray diffraction shows that - with hot or cold straightening - there is still a significant amount residual stresses existing in OCTG pipe bodies. A formula was proposed to include the effect of residual stress on determining the sour cracking resistance.
Picture for 09102 SSC Resistance of High Strength Low Alloy Steel OCTG in High Pressure H2S Environments
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09102 SSC Resistance of High Strength Low Alloy Steel OCTG in High Pressure H2S Environments

Product Number: 51300-090102-SG
ISBN: 09102 2009 CP
Author: Kenji Kobayashi, Tomohiko Omura and Masakatsu Ueda
Publication Date: 2009
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