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Rusted Prudhoe pipes 'in use till 2008'



By Upstream staff 

Photo by AP


UK-based supermajor BP will not phase out corrosion-plagued oil transit pipelines at its giant Prudhoe Bay oilfield in Alaska until early 2008 because of the complexity of replacing the lines, a BP spokesman said today.

BP promised to overhaul all 16 miles of oil transit pipelines at Prudhoe Bay last summer after government-ordered tests revealed severe corrosion in one section of the pipeline which BP had failed to detect.

The corrosion forced the partial shutdown of the 400,000-barrel-per-day field and sparked several investigations by Congress.

BP was already under investigation by a US federal grand jury for another oil spill at Prudhoe Bay caused by corrosion in the transit pipelines in March 2006, Reuters reported.

"We will be commissioning the first two segments in early 2008 and commissioning the other two later that year," BP Alaska spokesman Steve Rinehart said.

The overhaul is expected to cost BP between $150 million and $200 million.

In addition to new pipe segments, BP also plans to install new equipment to clean inside the pipes and to inject chemicals that inhibit corrosion. It will also install new leak detection systems, Rinehart said.

The pipes themselves might also be scaled down to better fit current production levels, he said.

Slow oil flows through some parts of the pipeline are believed to have been a factor behind the corrosion.

The first two segments to be replaced are the 3.1-mile (5-kilometre) upstream portion of the western transit pipeline, where the March spill occurred, and the 4.5-mile downstream segment of the eastern transit pipeline.

The upstream segment of the eastern transit pipeline, where the corrosion was discovered in August, will continue to operate using a system of temporary bypass pipes until later in 2008.

The US Department of Transportation asked BP to provide an update on the pipeline replacement plans in December. At the time, regulators said they may issue new corrosion monitoring procedures to BP to cover the temporary pipeline bypasses if the lines were to remain in service for an extended period of time.


Wednesday, 03 January, 2007, 22:30 GMT  | last updated: Wednesday, 03 January, 2007, 22:35 GMT

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