Experimental and theoretical study of gas hydrate formation in a high-pressure flow loop

2010 ◽  
pp. n/a-n/a
Author(s):  
Mohammad Sarshar ◽  
Jamshid Fathikalajahi ◽  
Ferreidun Esmaeilzadeh
Keyword(s):  
High Pressure ◽  
Gas Hydrate ◽  
Theoretical Study ◽  
Hydrate Formation ◽  
Flow Loop ◽  
Pressure Flow ◽  
Gas Hydrate Formation

scholarly journals Monitoring gas hydrate formation and transport in a flow loop with acoustic emission

2018 ◽  
Vol 55 ◽  
pp. 331-336 ◽  
Author(s):  
A. Cameirao ◽  
E. Serris ◽  
A. Melchuna ◽  
J.M. Herri ◽  
P. Glenat
Keyword(s):  
Acoustic Emission ◽  
Gas Hydrate ◽  
Hydrate Formation ◽  
Flow Loop ◽  
Gas Hydrate Formation

scholarly journals Separation Process of Nonpolar Gas Hydrate in Food Solution under High Pressure Apparatus

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Yohanes Aris Purwanto ◽  
Seiichi Oshita ◽  
Yasuhisa Seo ◽  
Yoshinori Kawagoe
Keyword(s):  
High Pressure ◽  
Gas Hydrate ◽  
Formation Rate ◽  
Hydrate Formation ◽  
Separation Process ◽  
Liquid Food ◽  
Screen Size ◽  
Solubility In Water ◽  
Gas Hydrate Formation ◽  
Inner Diameter

Separation process of nonpolar gas hydrate formation in liquid food was experimentally studied under high pressure container. Xenon (Xe) gas was selected as hydrate forming gas and coffee solution was used as a sample of liquid food. The high-pressure stainless steel container having the inner diameter of 60 mm and the volume of 700 mL with a U-shaped stirrer was designed to carry out this experiment. A temperature of 9.0°C and Xe partial pressure of 0.9 MPa were set as a given condition. The experiment was designed to examine the effect of steel screen size, formation rate, temperature condition, and amount of Xe gas dissolving in the solution on the separation process which was indicated by concentration efficiency. Screen size of 200 and 280 mesh resulted in higher concentration efficiency than that of 100 mesh. The higher stirring rate caused the higher formation rate of Xe hydrate and created the smaller Xe hydrate crystals. At the condition giving the same solubility in water, temperature of 14.8°C resulted in lower concentration efficiency than 9.0°C. The increase in the amount of Xe gas dissolving in coffee solution caused the concentration efficiency to decrease; however, the concentration ratio between the final and initial concentration of the solution increased.

Investigation on gas hydrate formation properties in a spiral flow using a flow loop

2020 ◽  
Vol 25 (3) ◽  
pp. 292
Author(s):  
Boyang Ding ◽  
Yongchao Rao ◽  
Minguan Yang ◽  
Yi Sun ◽  
Shuli Wang ◽  
...  
Keyword(s):  
Gas Hydrate ◽  
Hydrate Formation ◽  
Flow Loop ◽  
Spiral Flow ◽  
Gas Hydrate Formation

Experimental Investigation of Gas-Hydrate Formation and Particle Transportability in Fully and Partially Dispersed Multiphase-Flow Systems Using a High-Pressure Flow Loop

SPE Journal ◽  
2017 ◽  
Vol 23 (03) ◽  
pp. 937-951 ◽  
Author(s):  
Ahmad A. Majid ◽  
Wonhee Lee ◽  
Vishal Srivastava ◽  
Litao Chen ◽  
Pramod Warrier ◽  
...  
Keyword(s):  
Growth Rate ◽  
Pressure Drop ◽  
Gas Hydrate ◽  
Volume Fraction ◽  
Hydrate Formation ◽  
Flow Loop ◽  
Pump Speed ◽  
Dispersed System ◽  
Gas Hydrate Formation ◽  
Mixture Velocity

Summary As the oil-and-gas industries strive for better gas-hydrate-management methods, there is the need for improved understanding of hydrate formation and plugging tendencies in multiphase flow. In this work, an industrial-scale high-pressure flow loop was used to investigate gas-hydrate formation and hydrate-slurry properties at different flow conditions: fully dispersed and partially dispersed systems. It has been shown that hydrate formation in a partially dispersed system can be more problematic compared with that in a fully dispersed system. For hydrate formation in a partially dispersed system, it was observed that there was a significant increase in pressure drop with increasing hydrate-volume fraction. This is in contrast to a fully dispersed system in which there is gradual increase in the pressure drop of the system. Further, for a partially dispersed system, studies have suggested that there may be hydrate-film growth at the pipe wall. This film growth reduces the pipeline diameter, creating a hydrate bed that then leads to flowline plugging. Because there are different hydrate-formation and -plugging mechanisms for fully and partially dispersed systems, it is necessary to investigate and compare systematically the mechanism for both systems. In this work, all experiments were specifically designed to mimic the flow systems that can be found in actual oil-and-gas flowlines (full and partial dispersion) and to understand the transportability of hydrate particles in both systems. Two variables were investigated in this work: amount of water [water cut (WC)] and pump speed (fluid-mixture velocity). Three different WCs were investigated: 30, 50, and 90 vol%. Similarly, three different pump speeds were investigated: 0.9, 1.9, and 3.0 m/s. The results from these measurements were analyzed in terms of relative pressure drop (ΔPrel) and hydrate-volume fraction (ϕhyd). It was observed that, for all WCs investigated in this work, the ΔPrel decreases with increasing pump speed, at a similar hydrate-volume fraction. Analysis conducted with the partially-visual-microscope (PVM) data collected showed that, at constant WC, the hydrate-particle size at the end of the tests decreases as the mixture velocity increases. This indicates that the hydrate-agglomeration phenomenon is more severe at low mixture velocity. Calculations of the average hydrate-growth rate for all tests conducted show that the growth rate is much lower at a mixture velocity of 3.0 m/s. This is attributed to the heat generated by the pump. At a high mixing speed of 3.0 m/s, the pump generated a significant amount of heat that then increased the temperature of the fluid. Consequently, the hydrate-growth rate decreases. It should be stated that this warming effect should not occur in the field. Flow-loop plugging occurred for tests with 50-vol% WC and pump speeds lower than 1.9 m/s, and for tests with 90-vol% WC at a pump speed of 0.9 m/s. In addition, in all 90-vol%-WC tests, emulsion breaking, where the two phases (oil and water) separated, was observed after hydrate formation. From the results and observations obtained from this investigation, proposed mechanisms are given for hydrate plugging at the different flow conditions. These new findings are important to provide qualitative and quantitative understanding of the key phenomena leading to hydrate plugging in oil/gas flowlines.

Investigation on gas hydrate formation properties in a spiral flow using a flow loop

2020 ◽  
Vol 25 (3) ◽  
pp. 292
Author(s):  
Yongchao Rao ◽  
Yi Sun ◽  
Shuli Wang ◽  
Hao Ge ◽  
Boyang Ding ◽  
...  
Keyword(s):  
Gas Hydrate ◽  
Hydrate Formation ◽  
Flow Loop ◽  
Spiral Flow ◽  
Gas Hydrate Formation

scholarly journals Experimental study of gas hydrate formation and destabilisation using a novel high-pressure apparatus

2010 ◽  
Vol 27 (6) ◽  
pp. 1157-1165 ◽  
Author(s):  
L. Ruffine ◽  
J.P. Donval ◽  
J.L. Charlou ◽  
A. Cremière ◽  
B.H. Zehnder
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Gas Hydrate ◽  
Hydrate Formation ◽  
Gas Hydrate Formation ◽  
High Pressure Apparatus

Natural Gas Hydrate Formation and Decomposition in the Presence of Kinetic Inhibitors. 1. High Pressure Calorimetry

2011 ◽  
Vol 25 (10) ◽  
pp. 4392-4397 ◽  
Author(s):  
Nagu Daraboina ◽  
John Ripmeester ◽  
Virginia K. Walker ◽  
Peter Englezos
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Hydrate Formation ◽  
Natural Gas Hydrate ◽  
Gas Hydrate Formation

Investigation of natural gas hydrate slurry flow properties and flow patterns using a high pressure flow loop

2016 ◽  
Vol 146 ◽  
pp. 199-206 ◽  
Author(s):  
Lin Ding ◽  
Bohui Shi ◽  
Xiaofang Lv ◽  
Yang Liu ◽  
Haihao Wu ◽  
...  
Keyword(s):  
High Pressure ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Flow Patterns ◽  
Flow Properties ◽  
Natural Gas Hydrate ◽  
Slurry Flow ◽  
Flow Loop ◽  
Pressure Flow
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