2017
DOI: 10.1016/j.ces.2017.05.010
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Effect of monoethylene glycol and kinetic hydrate inhibitor on hydrate blockage formation during cold restart operation

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Cited by 28 publications
(14 citation statements)
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“…A new solution is hydrate risk control strategy, which allows hydrate formation in oil and gas pipelines with the injection of low dose hydrate inhibitors, such as antiagglomerants (AAs) [12][13][14] and kinetic inhibitors (KHIs). 15,16 This new strategy has attracted the attention of academia and industry. Therefore, it is critical to explore the hydrate formation and ow characteristics of high pressure ow systems for the implementation of hydrate risk control strategy.…”
Section: Introductionmentioning
confidence: 99%
“…A new solution is hydrate risk control strategy, which allows hydrate formation in oil and gas pipelines with the injection of low dose hydrate inhibitors, such as antiagglomerants (AAs) [12][13][14] and kinetic inhibitors (KHIs). 15,16 This new strategy has attracted the attention of academia and industry. Therefore, it is critical to explore the hydrate formation and ow characteristics of high pressure ow systems for the implementation of hydrate risk control strategy.…”
Section: Introductionmentioning
confidence: 99%
“…The subcooling to which PVP delays gas hydrate formation is fairly low compared to the best KHI polymers on the market today such as those based on N-vinylcaprolactam (VCap), N-isopropylmethacrylamide, or poly(ester amide)s. However, PVP has a high cloud and deposition point, compared to some KHI polymers, even in high salinity waters and is therefore used in some KHI formulations. 19 The cloud point temperature (T Cl ) is important for the production and transport of oil and gas as the production fluids are often very hot. However, these will cool down if there is a shut-in of the flow lines or as the transport lines stretch over longer distances, for example across the seabed offshore.…”
Section: ■ Introductionmentioning
confidence: 99%
“…When mixing KHIs with MEG, the observed synergistic effect with reduced MEG dosage and maintained inhibition power could be seen as a joint effort from both sides. As a typical THI, MEG would lower the fugacity coefficient of water and change the hydrate phase boundary via hydrogen bonding with water . In both systems, we observed that the inhibitive effect of mixed KHI–MEG formulations was increased with the increased concentration of MEG when the amount of KHI remained constant.…”
Section: Resultsmentioning
confidence: 76%
“…As a typical THI, MEG would lower the fugacity coefficient of water 29 and change the hydrate phase boundary via hydrogen bonding with water. 48 In both systems, we observed that the inhibitive effect of mixed KHI−MEG formulations was increased with the increased concentration of MEG when the amount of KHI remained constant. Therefore, the synergistic effect from the MEG side mostly related to the shifted equilibrium boundary was undeniable.…”
Section: Meg When Used Alonementioning
confidence: 77%