Wells – Processes – With indicating – testing – measuring or locating
Patent
1995-05-02
1996-08-20
Suchfield, George A.
Wells
Processes
With indicating, testing, measuring or locating
1662421, 166267, 166370, 166371, 166372, E21B 3406, E21B 4340, E21B 4706
Patent
active
055470211
ABSTRACT:
A method and apparatus for producing a well by varying its downhole pressure. A vacuum is applied to the top of a single string of tubing in a cased wellbore to encourage the formation of free gas at the bottom of the tubing string. The resulting free gas entrains reservoir liquids proximate the inlet opening in the tubing bottom and reduces the pressure gradient in the tubing thus maximizing fluid flow rates to the surface. To further enhance production rates in the event that reservoir gas/oil ratios are too low, supplemental gas volumes may be delivered to the well casing/tubing annulus.
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Greiner Stephen R.
Suchfield George A.
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