DRYING OF A 50KM PIPELINE THAT IS NOT BEEN BRUSHED
DRYING OF A 50KM PIPELINE THAT IS NOT BEEN BRUSHED
(OP)
Dear Sirs/Madams
We are trying to dry a 26" pipeline (50km) and after propelling 10 foam pigs by dry air (-40C dew point)the dew point of the end of line did not reach below +26C !!!
We now know that this pipeline is corroded internally and we have a 0.4mm oxide film in its internal wall ,and as you know the wall condition of a pipeline is a very important parameter in drying of it. the corrosion is due to lack of corrosion inhibitor in pipeline during last 3 years the pipeline were filled by sea water!
So please guide me what can we do now ? We need +7C dew point air at the end of line.What is the best way to dry this pipeline ?
We can not propel brush pigs in this line because we have not enough time to do this.
We are trying to dry a 26" pipeline (50km) and after propelling 10 foam pigs by dry air (-40C dew point)the dew point of the end of line did not reach below +26C !!!
We now know that this pipeline is corroded internally and we have a 0.4mm oxide film in its internal wall ,and as you know the wall condition of a pipeline is a very important parameter in drying of it. the corrosion is due to lack of corrosion inhibitor in pipeline during last 3 years the pipeline were filled by sea water!
So please guide me what can we do now ? We need +7C dew point air at the end of line.What is the best way to dry this pipeline ?
We can not propel brush pigs in this line because we have not enough time to do this.





RE: DRYING OF A 50KM PIPELINE THAT IS NOT BEEN BRUSHED
"I am sure it can be done. I've seen it on the internet." BigInch's favorite client.
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: DRYING OF A 50KM PIPELINE THAT IS NOT BEEN BRUSHED
You haven't mentioned what kind of service this pipeline is for. If I were an operator and my pipeline had sat for 3 years as this one had, I would want to check out the condition of the pipeline 1st with a smart pig run.
You stated -40C & +7C dew points, not sure how you jumped from -40 to +7 on the requirements, but for +7C, alcohol or methanol should get you there.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: DRYING OF A 50KM PIPELINE THAT IS NOT BEEN BRUSHED
"I am sure it can be done. I've seen it on the internet." BigInch's favorite client.
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com