Gas lift system
A gas lift method for lifting fluid from a borehole to the surface is described comprising the steps of: mixing at the surface a pressurized injection gas with a pressurized injection liquid without any foaming substance to form a gas-liquid pressurized non-foam mixture at a predetermined pressure less than the pressure at the bottom of the borehole, introducing the pressurized mixture into a first elongate portion of the borehole substantially at the predetermined pressure and flowing the mixture to a point down in the borehole to cause the gas to become gradually compressed more and more as the height of the gas-liquid column thereabove increases; then flowing the non-foam gas-liquid mixture at the point into a second elongate portion of the borehole which communicates with the surface to allow the gas to then gradually expand in and displace the well fluid upwardly towards the upper end of the borehole; and continuing the flow of the gas-liquid mixture into the first elongate portion to cause the continuing flow into the second elongate portion of the borehole with further lowering of bottom hole pressure and resultant flow of the well fluid to the surface from the well bore through the second elongate portion with resultant stabilization of the bottom hole pressure.
- Assignee:
- NOV; NOV-88-001127; EDB-88-071654
- Patent Number(s):
- US 4711306
- OSTI ID:
- 5451789
- Country of Publication:
- United States
- Language:
- English
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