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The new passivation mechanism in steam-assisted gravity drainage (SAGD) process is discussed through theoretical approach in this paper. A corrosion mitigation program was implemented that included the pigging both slug and batch corrosion inhibitors chemistry analysis corrosion rate (CR) monitoring and non-destructive tests.
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A model is developed to simulate electrolytic coupling between the carrier and casing pipe in a cased crossing, and to estimate diversion of the cathodic protection current from the rest of the pipeline for a given set of conditions.
In this paper, we have studied the ratio between light ends to heavy ends in different mixtures of diesel with two grades of crude oil utilizing gas chromatography.
This paper will focus on the laboratory corrosion testing of UNS R53400, R56404 and N06625 in a simulated hypersaline geothermal system, such as found in the Salton Sea KGRA.
Nga Awa Purua geothermal power station (NAP) operates a conventional direct contact condenser with recirculating cooling water and forced air cooling towers. The power station is located at the Rotokawa Geothermal field, near TaupÅ in the North Island of New Zealand. The field supports two power stations: NAP, which was commissioned in 2010 with an installed capacity of 140 MW; and Rotokawa I, a binary power plant which has been in operation since 1997.
To control the casing's severe CO2 inner corrosion and minimize damage to oil wells drilled into the Yan'an formation of Jurassic reservoirs; internal plastic coating was applied to the portion of the casing below the dynamic liquid level (nearly 700 m) for each of the more than 4000 wells drilled over the last 10 years. Considering the cost factor, it was not economic for the whole wellbore to have internal coating, so only the section with serious internal corrosion was internally coated with a modified epoxy-phenolic.
This kind of modified epoxy-phenolic coating has excellent mechanical and anti-corrosion performance. But it’s difficult to analyze the long term aging or local mechanical damage of downhole inner coating. New approaches by electrode logging tools have been studied for monitoring the inner coating.
A crossing between buried pipelines and transportation arteries such as railways and highways is a common reality. Nowdays it is ordinary practice, and standards are available for such pratctise1, to protect such pipelines by encasing them in a wider pipe, named Casing. The goal is to protect the carrier pipe providing an outer shell capable of withstanding mechanical stresses and eventual corrosion, without leakage risk. In usual conditions this kind of safety measure should not be necessary, still due to the difficult maintenance and monitoring accessibility below railways and highways it becomes a dependable protection method and device.