Weld procedure qualification methodologies for ExxonMobil high strain pipelines are presented. ExxonMobil has been involved in the design and construction of high strain pipelines for both onshore and offshore applications. These projects have included onshore applications involving potential seismic activity (fault displacement and soil liquefaction) as well as arctic applications that may involve displacements associated with frost heave and thaw settlement. Recent offshore installations have been designed and constructed to accommodate potential displacement caused by ice scour. Some of these installations have been designed to accommodate in excess of 3% longitudinal tensile strain demand. A critical element of the overall pipeline design is the qualification and validation of acceptable strain capacity for the pipeline girth welds. A girth weld qualification test program, based on large scale proof testing (i.e., curved wide plates) has been developed and executed.
C~hl 1S96 Soc@Y of PefrOINNII ErKIIrmers,km Thm paper wu praparad fw presenmfum at b+ 1SS6 SPE Arww.MlTec+mIIA Ccnferefwu * Exhdxtcn hela m Oenvar. Colorado U S A, 6-9 OUckar 1996 Ths paper was sebcmd for ws.antatmn by m SPE Pr~am Cwnmrtlee follmwng rewew of mfcmnatm comamd m MI absmct wbmrtwd by the SUIIW(*) Coc4mnlsof the paper as prmsnled, fmve IWI been rww!lWJ by me Socufy d PWO!eLun Ewn6em and me subIect 10 cartiba by @ author(s) Tf'N mafsrkl, a8 pmaantec, does nof rIOMas&%V Msc4 any posfim of ttu~ty cdPetmM EnOIIWW8,its c4Ecam,or mnmbwa Papars pm$entad al SPE mrntmgs am s@M to wbtitcm rswew by Edrnonal Canmttkes cd the SacmfY of Patrokwn Enpmsus P.nnusmn to copy u rosmcmd to M &slrrn of rot more !fwn 203 wcfds Illuslratans may rwt ba cqxed Tho abstract 8twu!d ccmmm cnnspcu-aus ackKw-ec@Ient of wtwre acd by m lhe pqmr was P+*wniad VMe Lbmnm, SPE, P O BOX Ml&36 RKh=dscm TX 7%Y32-262S U S A, lax 01-214.962-9435 AbstractThis paper discusses the pre-driIl evaluation and post-drill results of a four well horizontal drilling program in two bottom water drive reservoirs with 20 foot oil columns. The pre-drill evaluation consists of a multidiscipline reservoir interpretation that combines 3-D seismic, strati graphy, oil correlation, reservoir model simulation, and performance. Factors critical to the successfid execution of the drilling program were hole size, rig selection and drill-in fluids. Program results are derived from measured while drilling open hole logs, well performance, flowing pressure data, and production logging, The paper analyzes the complexities of production log interpretation in two phase horizontal flow.
This paper reviews the specific testing methodologies implemented for the qualification of mechanized pulsed gas metal arc welding (PGMAW) procedures for strain based design applications. The qualified welding procedures were used during recent construction of an offshore pipeline subject to potential ice scour with an initial design target of 4% tensile strain capacity. This paper addresses the integrated development of linepipe specifications, large scale validation testing, weld procedure development, and finally, the verification of robustness through full scale pressurized testing of actual girth welds on project pipe material. The qualification sequence, from linepipe specification development through final full scale girth weld proof test is described.
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