Intensification of the Processes of Oil and Gas Mixtures Heating in Horizontal Pipe

2016 ◽  
pp. 35-49
Author(s):  
Z Salimov ◽  
O Ismailov ◽  
Sh Saydahmedov ◽  
Gennady Zaikov
Keyword(s):  
Oil And Gas ◽  
Gas Mixtures ◽  
Horizontal Pipe

Holdup Measurements of Aqueous Foam Flows and Flow Regime Characterization through Image Processing

2021 ◽  
pp. 1-9
Author(s):  
I. M. Carraretto ◽  
D. Pari ◽  
D. Fasani ◽  
A. Lucchini ◽  
M. G. Guilizzoni ◽  
...  
Keyword(s):  
Flow Regime ◽  
Oil And Gas ◽  
Plug Flow ◽  
Flow Region ◽  
Oil And Gas Industry ◽  
Liquid Holdup ◽  
Liquid Loading ◽  
Horizontal Pipe ◽  
Drift Flux Model ◽  
Aqueous Foam

Summary One of the most critical issues in the oil and gas industry is the dewatering of the pipelines used for natural gas transportation, and foam injection seems to be a prominent solution. This work has two goals: The main one concerns the development of an optical tool to measure the liquid holdup in foamy flows and perform the flow regime characterization, whereas the secondary goal is to quantify the effectiveness of surfactant injection in reducing the liquid loading. In this paper, we present the results of an experimental campaign aimed at the characterization of gas-liquid-foam flows in a horizontal pipe. Initially, liquid loading measurements for gas and liquid superficial velocities, ranging from 0.41 to 2.30 m/s and from 0.03 to 0.06 m/s, respectively, were performed by means of a specifically developed optical method. For each liquid superficial velocity, the minimum liquid holdup was found to lie in the proximity of the boundary between plug and stratified flow regime, with a superficial gas velocity between 0.44 and 0.90 m/s. Hence, the plug flow region corresponds to the best operating condition to perform the pipeline dewatering procedure. Moreover, the drift-flux model usually adopted for ordinary two-phasegas-liquid flows seems to fit well with the measured values of void fraction.

Experimental Study of Sand Particle Concentration Profiles in Straight and Pipe Elbow for Horizontal Multiphase Flows

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
N. R. Kesana ◽  
R. Vieira ◽  
B. S. McLaury ◽  
S. A. Shirazi
Keyword(s):  
Oil And Gas ◽  
Particle Diameter ◽  
Sand Particle ◽  
Horizontal Pipe ◽  
Oil And Gas Producers ◽  
Pipe Elbow ◽  
Fluid Velocities ◽  
Erosion Models ◽  
The Face ◽  
Concentration Measurements

Sand production is one of the major concerns for oil and gas producers. If production fluid velocities are not controlled properly, the produced sand may erode the pipelines which may result in pipe failures and halt the production causing economical losses as well as environmental issues. In order to better understand the erosion mechanism and improve current erosion models, it would be beneficial to identify the distribution of sand flowing inside the pipe. Therefore, sand sampling was performed at five different locations inside a 0.0732 m (3 in.) diameter horizontal pipe at L/D ∼ 150 using a pitot-style tube 6.35 mm (0.25 in.) in diameter. The probe was moved transversely from the top of the pipe and the face of the probe is facing the fluid flow to achieve sampling close to isokinetic conditions. Additionally, sampling experiments were conducted using the fixed mounted ports at the pipe wall. Using the fixed mounted ports, sampling is conducted both in a straight pipe section and elbow section. Experiments were performed in two different multiphase flow patterns (slug and wavy-annular) using two different particle sizes (150 μm and 300 μm) and three different liquid viscosities (1 cP, 10 cP, 40 cP). The influence of particle diameter, liquid viscosity, and the flow pattern on the sand distribution profiles will be discussed. From the experimental data, the recommended approaches for flowing concentration measurements are discussed. Finally, the implications of the sand concentration measurements on erosion are mentioned.

scholarly journals PATTERNS OF THE VARIATION OF PARAMETERS OF TRANSFER PROCESSES FOR MULTICOMPONENT HYDROCARBON GAS MEDIA UNDER SEPARATION

2020 ◽  
pp. 86-95
Author(s):  
A.V. Dmitriev ◽  
◽  
P.N. Zyatikov ◽  
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Heterogeneous Media ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Mixtures ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Hydrocarbon Gas ◽  
Property Changes

A detailed study of the evolution of local and integral parameters of momentum, heat, and mass transfer processes in hydrocarbon gas mixtures under separation conditions at given temperature and pressure values in working media is carried out within the framework of the principles of equilibrium thermodynamics using the Aspen HYSYS software package, namely, the Peng-Robinson equation of state for real gas mixtures, the principles of statistical mechanics, the approaches of corresponding states, the Chapman-Enskog and the Golubev methods, and the theory of similarity and dimensional analysis. The limits of similarity method applicability in quantitative estimates and qualitative forecasts of the mechanisms and configurations of convective heat and mass transfer in oil treatment units are established. The paper also discusses results of the analog method application in separation process modeling for momentum, heat and mass transfer processes in the problems of oil and gas industry. The conclusions about the aspects of property changes in complex mixtures and about heat and mass transfer intensity during separation, which violate a triple analogy in non-isothermal homogeneous and heterogeneous media, are recommended to take into account when designing real equipment.

Experimental Characterization of Particle-Laden Air Flow in a Horizontal Pipe

2015 ◽  
Author(s):  
Y. Dai ◽  
T. S. Khan ◽  
M. S. Alshehhi ◽  
L. Khezzar
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Solid Particles ◽  
Horizontal Pipe ◽  
Gas Industry ◽  
Black Powder ◽  
Powder Samples ◽  
Flow Through

In many engineering applications, movement of micron and submicron size solid particles with compressed air or gas causes major engineering problems as in the case of black powder in oil and gas industry. Therefore, understanding its physical and flow dynamics characteristics inside a pipeline can be very useful to efficiently manage pipelines contamination issues. This paper presents an experimental study carried out to simulate characteristics of air-sand particles flow through a transparent horizontal pipe with various flow conditions. Experimental analysis focuses on determination of critical pickup velocity of the solid particles and measurement of pressure drop across the sand bed of various blockage ratios. Results have been compared with previous studies in literature. Limited experiments are conducted using black powder samples as well. Comparison of results shows vast deviation between sand and black powder behavior.

Sign in / Sign up

Export Citation Format

Share Document