3. Waxes in Oil

Flow assurance - Paraffins in oil pipelineLow temperatures result in the deposition of the desolved waxes of the oil on the internal surface of well tubing, and on the wall of flowlines and risers. As a result the diameter of the pipes is reduced and depending on the deposition rate wax may ultimately block the line  

Was deposition can be avoided by:
1. Thermal insulation or heating of the affected parts (flowlines, riser, trees etc) in order to maintain the temperature above the deposition threshold.
2. Pigging of the flowline to remove waxed that have been deposited
3. Chemical Injection: Injection of 

 

 

Futher Reading:
http://paraffindepositionandcontrol.wikispaces.com/4.+The+problem+with+Paraffin+Wax+Deposition