Hydrate prevention in gas production
Patent
·
OSTI ID:6303092
This specification discloses a method of injecting a freezing-point depressant through an annulus into a well through which gas is being flowed from a subterranean formation to the surface under conditions conducive to formation of hydrates. Particularly, the freezing-point depressant is injected during gas production and for a predetermined time interval after natural gas production has been stopped to provide within the well a finite body of freezing point depressant. Upon subsequent production, the freezing-point depressant will commingle immediately with the gas and prevent formation of hydrates during initial production when the pressure differentials and the temperature gradients may be most severe. Suitable freezing-point depressants include methanol, ethylene glycol, diethylene glycol, or triethylene glycol. (6 claims)
- Assignee:
- Mobil Oil Corp.
- Patent Number(s):
- US 3348614
- OSTI ID:
- 6303092
- Country of Publication:
- United States
- Language:
- English
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