New method for rapid thixotropic measurement of waxy crude

Lei Hou , Jin-jun Zhang

Journal of Central South University ›› 2007, Vol. 14 ›› Issue (Suppl 1) : 471 -473.

PDF
Journal of Central South University ›› 2007, Vol. 14 ›› Issue (Suppl 1) : 471 -473. DOI: 10.1007/s11771-007-0309-4
Article

New method for rapid thixotropic measurement of waxy crude

Author information +
History +
PDF

Abstract

Waxy crude exhihibits a thixotropic behavior at the temperature closing to the gelation threshold. The thixotropic model is considered to be of crucial importance in the calculation of restart pressure for crude oil pipeline in shutdown. The thixotropic curves at several shear rates are necessary for the determination of the model parameters. The traditional measurement of thixotropic curves is complicated and takes much time, especially, it is impossible to be carried out under the condition of pipeline operation. According to the experimental observation and analysis, an empirical and simple method is developed to solve this problem. The test results show that the average relative error of the two methods is less than 25%.

Keywords

waxy crude / thixotropy / measurement / empirical method / stepped shear rate

Cite this article

Download citation ▾
Lei Hou, Jin-jun Zhang. New method for rapid thixotropic measurement of waxy crude. Journal of Central South University, 2007, 14(Suppl 1): 471-473 DOI:10.1007/s11771-007-0309-4

登录浏览全文

4963

注册一个新账户 忘记密码

References

[1]

DullaertK., MewisJ.. A structural kinetics model for thixotropy[J]. J Non-Newtonian Fluid Mech, 2006, 139: 21-30

[2]

DullaertK., MewisJ.. A model system for thixotropy studies[J]. Rheol Acta, 2005, 45: 23-32

[3]

MalcolmR. D., NguyenQ. D., ChangC., et al.. A model for restart of a pipeline with compressible gelled waxy crude oil[J]. J Non-Newtonian Fluid Mech, 2004, 123: 269-280

[4]

SestakJ.. Start-up of gelled crude oil pipeline[J]. J Pipelines, 1987, 6: 15-24

[5]

CawkwellM. G., CharlesM. E.. Characterization of Canadian Arctic thixotropic gelled crude oils utilizing an eight-parameter model[J]. J Pipelines, 1989, 7: 251-264

[6]

BarnesH. A.. Thixotropy-A review[J]. J Non-Newt Fluid Mech, 1997, 70: 1-33

[7]

ZhangF., ZhangJ.-j., YangX.-jing.. Comparison of thixotropic models of waxy crude oil[C]. The XIV International Congress on Rheology. Seoul, Korea, 2004, 8: 22-27

[8]

ChangC., NguyenQ. D., RønningsenH. P.. Isothermal start-upof pipeline transporting waxy crude oil[J]. J Non-Newtonian Fluid Mech, 1999, 87: 127-154

[9]

ChengD. C. H.. Characterisation of thixotropy revisited[J]. Rheol Acta, 2003, 42: 372-382

[10]

LuoT. H.Rheological Characteristics and Pipeline Transportation of Waxy Crude Oil[M], 1991, Beijing, Petroleum Industry Press

AI Summary AI Mindmap
PDF

122

Accesses

0

Citation

Detail

Sections
Recommended

AI思维导图

/