Sodium bisulfite (SBS) is used as an oxygen scavenger to decrease corrosion in pipelines transporting brackish subsurface water used in the production of bitumen by steam-assisted gravity drainage. Sequencing 16S rRNA gene amplicons has indicated that SBS addition increased the fraction of the sulfate-reducing bacteria (SRB) Desulfomicrobium, as well as of Desulfocapsa, which can also grow by d...

Corrosion of iron and copper pipes can produce leaks and loss of efficiency in the water distribution system, elevate levels of contaminants at the tap, and cost billions of dollars annually in pipe replacement or rehabilitation. In situ pipe rehabilitation using cement mortar, polyurethane, and epoxy is a commonly employed method of dealing with aging yet structurally sound pipes because it is...

Breivoll Inspection Technologies (BIT) has successfully developed and implemented a new in-pipe inspection method for the condition assessment of metallic water mains, mainly cast iron. The method is based on Acoustic Resonance Technology (ART). The inspection data (acoustic signals) are stored on a hard drive prior to undertaking the detailed analysis back at the office. The assessment results...

Microbiologically influenced corrosion (MIC) is a growing problem in the oil and gas industry that results in huge financial losses each year worldwide. Reservoir souring, equipment and pipeline failures due to MIC pitting attacks are of great concerns in field operations. A group of bacteria known as sulfate reducing bacteria (SRB) are often the culprits. Currently, the basic understanding of ...

During well repair operations in an oil field, a Φ73.02 mm×5.51 mm N80 grade flat pipe with circular hole was found. The depth of the is between 550 meters to 2100 meters, usage cycle 120 days. In order figure out root cause failure, series experiments were carried out. chemical composition, yield strength, tensile and elongation meet requirements API SPEC 5CT-2018 standard. microstructure matr...

A model is developed to predict the chemistry, corrosion potential and rate of pipeline steels in a crevice formed when a coating disbonds from a pipe surface. The gap of the coating disbonded region is assumed to vary with distance from the mouth. The effect of this gap variation on the chemistry and corrosion rate in the coating disbonded region is investigated in this study through modeling....

In view of the local cracking and leakage water-wall pipe Subcritical Boiler in a thermal power plant, mechanism water wall was studied by means macroscopic analysis, chemical composition metallographic structure, Brinell hardness test, tensile test at room temperature scanning electron microscopy. The results show that there is no misuse materials or unqualified cracked leaked pipe. There are ...