Effect of ammonium-containing polyalkyl acrylate on the rheological properties of crude oils with different ratio of resins and waxes

2016 ◽  
Vol 146 ◽  
pp. 96-102 ◽  
Author(s):  
Irina V. Litvinets ◽  
Irina V. Prozorova ◽  
Natalya V. Yudina ◽  
Oleg A. Kazantsev ◽  
Alexey P. Sivokhin
Keyword(s):  
Rheological Properties ◽  
Crude Oils

scholarly journals Ultrasonic and Heat Treatment of Crude Oils

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3084 ◽  
Author(s):  
Aidar Kadyirov ◽  
Julia Karaeva
Keyword(s):  
Heat Treatment ◽  
Crude Oil ◽  
Rheological Properties ◽  
Experimental Method ◽  
Ultrasonic Treatment ◽  
Experimental Studies ◽  
High Viscosity ◽  
Crude Oils ◽  
Rheological Characteristics ◽  
Thermal Heating

One of the methods of influence on rheological properties of heavy high-viscosity crude oils is ultrasonic treatment. Ultrasonic treatment allows reducing the viscosity of crude oil and, therefore, reducing the costs of its production and transportation. In this paper, the influence of ultrasonic treatment on the rheological characteristics of crude oil (sample No. 1 API = 29.1, sample No. 2 API = 15.9) was investigated. An experimental method was developed. Experimental studies were carried out using the Physica MCR 102 rheometer. The influence of the intensity and duration of ultrasonic treatment on the viscosity of the initial crude oils was studied for 24 h. In addition, the rheological characteristics of the treated oil were investigated after its natural cooling to 293 K. The results are compared with similar results for thermal heating.

The Behavior of Bubbles in Non-Newtonian Lubricants

1977 ◽  
Vol 99 (4) ◽  
pp. 455-461 ◽  
Author(s):  
A. Shima ◽  
T. Tsujino
Keyword(s):  
Rheological Properties ◽  
Bubble Radius ◽  
Equation Of Motion ◽  
Crude Oils ◽  
Bubble Wall ◽  
Pressure Equation ◽  
Cavitation Damage ◽  
Lubricating Oils ◽  
Cavitation Bubbles ◽  
Impulse Pressure

The behavior of cavitation bubbles and the impulse pressure occurring from the bubble in non-Newtonian lubricants are analyzed as one of the studies on cavitation which is caused on the bearing metals and oil pressure valves. That is, the equation of motion for a bubble and the pressure equation can be derived by using the Sisko model which well represents the rheological properties of lubricants (lubricating greases, and crude oils in place of lubricating oils), and the variation with time of the bubble radius and the pressure and velocity at the bubble wall in greases and crude oils are numerically obtained. In consequence, it was found that the impulse pressure occurring from the collapse of comparatively large bubbles can be a cause for the cavitation damage.

scholarly journals Effect of ultrasonic irradiation on rheological properties of asphaltenic crude oils

2012 ◽  
Vol 9 (1) ◽  
pp. 82-88 ◽  
Author(s):  
Seyed Mohammadreza Mousavi ◽  
Ahmad Ramazani ◽  
Iman Najafi ◽  
Seyed Mohammad Davachi
Keyword(s):  
Rheological Properties ◽  
Ultrasonic Irradiation ◽  
Crude Oils

Solubility and Rheological Properties of Live Crude Oils

2012 ◽  
Vol 524-527 ◽  
pp. 1881-1888
Author(s):  
Fei Yang ◽  
Chuan Xian Li ◽  
Bing Huan Xia ◽  
Yan Bo Lu
Keyword(s):  
Rheological Properties ◽  
Pour Point ◽  
Saturation Pressure ◽  
Saturation Temperature ◽  
Dilution Effect ◽  
Crude Oils ◽  
Gas Oil ◽  
Dissolved Gas ◽  
Light Alkanes ◽  
Abnormal Point

Multiphase transportation of the wellhead product in a single pipeline is widely used in oilfields. The oil samples transported in the multiphase pipeline are often live oils saturated by light alkanes. To support the multiphase pipelining more efficiently, in this paper, the solubility and rheology of Chang10 live crude oils are studied at the pressures range from 0 to 2.0 MPa. It was found that the dissolved gas in the live oils is mainly composed of methane (32.70 vol% at 1MPa), ethane (19.43 vol% at 1MPa), propane (21.42 vol% at 1MPa) and C4+ component (22.50 vol% at 1 MPa). The gas-oil ratio, Rs, of the live oils increases rapidly with the increase of saturation pressure. However, the effect of saturation temperature on Rs is very small. The pour point, abnormal point, WAT, viscosity/equilibrium viscosity and yield stress of the live oils decrease obviously with the increase of saturation pressure, meaning that the rheological properties of the live oils improve greatly by gas dissolving. The rheological properties of the live oils are improved mainly by the dilution effect of the dissolved gas.

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