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ABSTRACT Many pipelines used to transport high pressure gas to long distances are made from carbon steel plates by spiral welding. There are instances in which such pipelines gave a long service in sour atmospheres. But, when they failed, they failed catastrophically and sometimes repeated failures occurred. In one such failure instance, the pipeline in the subject case gave a service life of about 12 years in sour gas service. In year 2012, the pipeline failed suddenly by cracking along the heat affected zone (H.A.Z.) of the spiral weld. Onwards, frequent failures began to occur in identical fashion at different locations. This prompted for a failure investigation to be carried out. Mechanical, metallurgical and chemical tests and analyses have been carried out to understand the natures of the failures. The paper presents the findings and a discussion on the correlation of mechanical, metallurgical and chemistry parameters to the type of failure that has occurred.
- North America > United States > Texas (0.21)
- Asia > Middle East > Kuwait (0.17)
- Materials > Metals & Mining (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- Well Completion > Well Integrity > Subsurface corrosion (tubing, casing, completion equipment, conductor) (1.00)
- Production and Well Operations > Production Chemistry, Metallurgy and Biology > Corrosion inhibition and management (including H2S and CO2) (1.00)
- Facilities Design, Construction and Operation > Pipelines, Flowlines and Risers > Materials and corrosion (1.00)
The areas of the oil field reserves are spread all over the country. For the sake of convenience and proper management of these oil fields reserves have been divided into four areas - North, South, East and West. In each of these areas oil producing wells, crude gathering centers for processing the raw crude, gas booster stations for processing and enhancing the pressure of the gas to enable transportation of gas, and water treatment/injection plants have been constructed. The pipelines, which are interconnecting various facilities across the four areas are buried cross country lines, transport different process treated fluids -dry crude, dry high pressure (HP) gas, low pressure (LP), fuel gas, condensate and treated water. Hence the challenge for corrosion monitoring is all the more complex. It is worthy of notice that the task of the Internal Corrosion Management Plan becomes more challenging due to the changes in the fluids' characteristics, the expansion of the pipeline network, and the location; especially that mostly of the pipelines are cross country and sometimes in remote or residential areas. The present paper focuses on the Internal Corrosion Management Plan of two of high pressure (HP) gas pipelines with company's tag numbers HP042 and HP057, different diameters, lengths and constructed from API
- North America > United States > Montana > Sheridan County (0.45)
- North America > United States > Texas > Harris County > Houston (0.18)
- Well Completion > Well Integrity > Subsurface corrosion (tubing, casing, completion equipment, conductor) (1.00)
- Production and Well Operations > Production Chemistry, Metallurgy and Biology > Corrosion inhibition and management (including H2S and CO2) (1.00)
- Facilities Design, Construction and Operation > Pipelines, Flowlines and Risers > Materials and corrosion (1.00)