A Study on the Effects of Flow Induced Vibration on Existing Topside Piping, Flowlines and Jumper against increase in Flowrates for an FPSO located in the Gulf of Guinea.

9th Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, Flow-Induced Vibration & Noise

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Title A Study on the Effects of Flow Induced Vibration on Existing Topside Piping, Flowlines and Jumper against increase in Flowrates for an FPSO located in the Gulf of Guinea.
Creator Oluwaseun Michael Awe; Shell Nigeria Exploration and Production Company Ltd
Juan Pablo Pontaza; Shell International and Exploration Company Ltd
Pieter Van Beek; TNO
Stefan Belfroid; TNO
Néstor González Díez; TNO
Subject FIV Screening
Description A flow induced vibration studies was initiated to support design decision required to deliver additional flowrates through existing topside piping network, flowline and jumper. 180Kbwpd is currently been delivered to the subsea wells through the existing network of piping and flowline. A maximum of 250kwpd is proposed to be flowed through the existing systems with some slight modifications on the configuration on topside piping network. A three-tiered [1] level assessment was adopted in this study. Starting with a high level evaluation criteria as described in table K.1 Appendix K of Shell DEP[2] and EI AVIFF Guidelines [3] at an incremental rate of 10kwpd, to maximum expected flowrates of 250kwpd. At 200kwpd the kinetic energy in the piping system ρν2 is greater than 20Kpa. Based on [2] the piping is classified as highly susceptible to failure requiring a further assessment by EI AVIFF. EI AVIFF guidelines [3] for the maximum 250kwpd gave a likelihood of Failure (LOF) scores below 1 for the topside piping but above 1 for subsea water injection flowline jumpers. LOF scores above 1 as per AVIFF guidelines [3] indicate a failure. This necessitated a tier 2 screening for the subsea water injection flowline jumpers. Estimated lives for both jumpers evaluated were 59.3 and 110.4 years respectively for high stress locations at the connections. However the analysis was based on as-built documentation for supports and the piping configuration as when constructed. A full screening was evaluated for the piping system calibrated by onsite vibration measurements, current support locations and full contact assessment between piping and supports. The measured vibration was used in calibrating the developed FEA model at the maximum measured flowrate. The model is therefore extrapolated for the proposed increase to determine the FIV impact as well as the expected life cycle of the configuration.
Publisher Paper Management System for FIV2018
Contributor Shell Nigeria Exploration and Production Company Ltd
Date 2018-05-07 15:14:49
Type Peer-reviewed Paper
Engineering Analysis, Field Data
Format application/pdf
Identifier http://www.fiv2018.com/ocs/index.php/fiv2018/fivcan/paper/view/194
Source Paper Management System for FIV2018; FIV2018 Conference
Language en
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