Methane Hydrates, page-2

Its not this type of hydrates. Certain pressure and temperature ranges are deliver favorable conditions for the formation of gas hydrates in drilling muds. Hydrates are solid structures formed from water and gas. Water contained in drilling muds will form, under certain temperature and pressure conditions, a solid structure with the gas molecules. Formation of these solid gas hydrates is likely to plug kill and choke lines as well as the annular spaces, and may cause interruption of the drilling operation and even destruction of the rig equipment.