Acid washes, oxygenate scavengers work against gas gathering failures

A combination of acid washes and oxygenate scavengers can both reduce the frequency of pipeline failures caused by existing pitting corrosion and prevent new pitting corrosion. This article applies such an approach to natural gas transmission pipelines subject to frequent failures in a gas productio...

Full description

Saved in:
Bibliographic Details
Published in:The Oil & gas journal 2013-07, Vol.111 (7), p.106-111
Main Authors: MANSOORI, Hamed, MIRZAEE, Reza, ABDUL HASSAN MOHAMMADI, ESMAEILZADEH, Feridun
Format: Magazinearticle
Language:English
Subjects:
Acids
Applied sciences
Carbon dioxide
Corrosion
Corrosion inhibitors
Corrosion potential
Corrosion prevention
Crude oil, natural gas and petroleum products
Discount coupons
Electrochemistry
Electrolytes
Energy
Exact sciences and technology
Failure
Fuels
Gas pipelines
Injection
Natural gas
Oil and gas production
Petroleum pipelines
Pipelines
Pitting (corrosion)
Salinity
Scavengers
Steel pipes
Wells
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A combination of acid washes and oxygenate scavengers can both reduce the frequency of pipeline failures caused by existing pitting corrosion and prevent new pitting corrosion. This article applies such an approach to natural gas transmission pipelines subject to frequent failures in a gas production field in southern Iran. The gas condensate field has more than 30 wells. The wells have varying amounts of carbon dioxide, but all are considered sweet gas. Amine-based corrosion inhibitors (CI) prevent or mitigate internal corrosion. Laboratory electrochemical polarization tests, as well as field data from corrosion monitoring coupons and monitoring of iron ion counting, determined optimum CI concentration and injection rate. Acid washing removes the protective film of corrosion inhibitor. Two common methods for reintroducing this film to the pipe wall are filling the space between two sealing pigs with CI and then launching the pigs inside the pipe, and increasing the injection rate of CI to three-times normal for 72 hr.
ISSN:0030-1388
1944-9151