Artigo científico - moléculas

One of the main challenges in deep-water drilling is gas-hydrate plugs, which make the drilling unsafe. Some oil-based drilling fluids (OBDF)
that would be used for deep-water drilling in the South China Sea were tested to investigate the characteristics of gas-hydrate formation,
agglomeration and inhibition by an experimental system under the temperature of 4 ◦C and pressure of 20 MPa, which would be similar to the
case of 2000 m water depth. The results validate the hydrate shell formation model and show that the water cut can greatly influence hydrate
formation and agglomeration behaviors in the OBDF. The oleophobic effect enhanced by hydrate shell formation which weakens or destroys
the interfacial films effect and the hydrophilic effect are the dominant agglomeration mechanism of hydrate particles. The formation of gas
hydrates in OBDF is easier and quicker than in water-based drilling fluids in deep-water conditions of low temperature and high pressure
because the former is a W/O dispersive emulsion which means much more gas-water interfaces and nucleation sites than the later. Higher
ethylene glycol concentrations can inhibit the formation of gas hydrates and to some extent also act as an anti-agglomerant to inhibit hydrates
agglomeration in the OBDF.

a frase que está ruim de traduzir é "The results validate the hydrate shell formation model and show that the water cut can greatly influence hydrate formation and agglomeration behaviors in the OBDF. " especificamente a palavra shell nesse contexto que parece não ser ostra ou casca! por favor me ajuda!