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  • Users: cacofes
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  1. cacofes

    Use of brass (ASTM B111) under sour production conditions

    Hi, We have been given an option to use brass (spec ASTM B111) as the barrel material for downhole plunger pumps. This is the material composition Cu:70.5%; Sn:1%; Pb:0.017%; Zn:28.403% and As:0.04%. Here are the operating conditions of the well: Pressure between 5000 to 8000 kPa...
  2. cacofes

    Use of brass (ASTM Spec B111) under sour conditions

    Hi, We have been given an option to use brass (spec ASTM B111) as the barrel material for downhole plunger pumps. This is the material composition Cu:70.5%; Sn:1%; Pb:0.017%; Zn:28.403% and As:0.04%. Here are the operating conditions of the well: Pressure between 5000 to 8000 kPa...
  3. cacofes

    Polystyrene vs. polyurethane foam for insulation

    Not sure if this is the right forum but I am looking for any experiences with polystyrene foam as insulation material for piping. Seems like polyurethane is widely used but polystyrene comes at almost half the price and also has a very low heat transfer coefficient. I appreciate anyone sharing...
  4. cacofes

    Welding and Magnetism

    On a recent pipeline cut out operation, our welders found some magnetism in the line. This is a 12in 70 km long dry gas pipeline. From what we saw, there was no magnetism previous to cutting the line but once we cut it, it was magnetized. There are many theories about the source of the magnetism...
  5. cacofes

    Erosion Rate Calculations of Carbon Steel Due to High Velocity Steam

    In northern Canada SAGD (Steam Assisted Gravity Drainage) operations are becoming very popular to produce heavy oil out of tar sands. This process requires injection of steam at very high temperatures into the producing formation. The company that I work for is experiencing erosion in fittings...
  6. cacofes

    Falling Slug

    Could anyone tell me how to calculate the velocity of a slurry that will be dropped in a well whith and internal diameter of 5.5 inches? I know the viscosity and density of my slurry.

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