Method of determining paraffinic crude flow restart conditions

Details Method of determining paraffinic crude flow restart conditions Method of determining paraffinic crude flow restart conditions

2005-12-08

2008-10-14

Cygan, Michael (Department: 2855)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Earth science

C702S013000

Reexamination Certificate

active

07437247

ABSTRACT:
The invention relates to a method of estimating the flow restart conditions of a paraffinic hydrocarbon in a pipe, wherein the following stages are carried out:selecting a theological model,determining the temperature and shear stress fields in the steady hydrocarbon flow,evaluating the conductive thermal exchanges during circulation standstill phases, from the steady flow temperatures and the standstill time taken into account,selecting various sections of the pipe and recording the thermomechanical scenarios undergone by the hydrocarbon in these sections,experimentally measuring the rheological parameters of the model on a sample of the hydrocarbon, according to each one of said scenarios, and taking into account these experimental measurements to evaluate the value of the pressure that restarts circulation of the paraffinic hydrocarbon in the pipe.

REFERENCES:
patent: 3791395 (1974-02-01), Dunlap et al.
patent: 3977234 (1976-08-01), Lynch et al.
patent: 5877409 (1999-03-01), Girling
patent: 6629451 (2003-10-01), Taylor
patent: 2758185 (1998-07-01), None
patent: 2796152 (2001-01-01), None
Cawkwell, M.G., and Charles, M.E., “An Improved Model for Start-Up of Pipelines containing Gelled Crude Oil”, Journal of Pipelines, vol. 7 (1987), pp. 41-52.
Houska, M. et al. “Start-Up of Celled Crude Oil Pipelines” Journal of Pipelines, vol. 6 (1987) pp. 15-24.
Smith, Peter and Ramsden, Rex “The Prediction of Oil Gelation in Submarine Pipelines and the Pressure Required for Restarting Flow” 1978 European Offshore Petroleum Conference & Exhibition, pp. 283-290.
Perkins, T.K. and Turner, J.B. “Starting Behavior of Gathering Lines and Pipelines filled with Gelled Prudhoe Bay Oil”, 45th Annual SPE of AIME Fall Meeting, SPE-2997, Mar. 1971, pp. 301-308.
Cooper, D.F. et al. “Transient Temperature Effects in Predicting Start-Up Characteristics of Gelling-Type Crude Oils” International Conference of Heat Transfer vol. 4, 1978, pp. 67-71.

Affiliated with

Also associated with

Rating

Method of determining paraffinic crude flow restart conditions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of determining paraffinic crude flow restart conditions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of determining paraffinic crude flow restart conditions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4009758