Use of friction stir and laser shock processing in oil & gas and petrochemical applications,申请号US20060643526-传众专利搜索

Use of friction stir and laser shock processing in oil & gas and petrochemical applications

申请公布号：US2008032153(A1)

申请号：US20060643526

申请日期：2006.12.21

申请公布日期：2008.02.07

发明人：VAUGHN GLEN A.;BANGARU NARASIMHA-RAO VENKATA;KOO JAYOUNG;AYER RAGHAVAN;BEESON DANNY L.;THIRUMALAI NEERAJ S.;BAKER DAVID A.;NORMAN DAVID A.;FORD STEVEN J.;FAIRCHILD DOUGLAS P.

分类号：B32B15/00

主分类号：B32B15/00

摘要：The use of friction stir and laser shock processing in oil & gas and/or petrochemical applications is provided by the present invention. The use includes subjecting friction stir weldments, fusion weldments, and other critical regions of ferrous and non-ferrous alloy components used in oil & gas and petrochemical applications to laser shock processing to create residual compressive stresses near the surface of the treated area. The residual compressive forces in the ferrous or non-ferrous components improve properties including, inter alia, surface strength, fatigue life, surface hardness, stress corrosion resistance, fatigue resistance, and environmental cracking resistance. Friction stir and laser shock processing find particular application in high strength pipelines, steel catenary risers, top tension risers, threaded components, liquefied natural gas containers, pressurized liquefied natural gas containers, deep water oil drill strings, riser/casing joints, and well-head equipment.