Method and system for automatically raising product from a...

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E - Fixed Constructions

21

B

166/26

E21B 43/00 (2006.01)

Patent

CA 1215315

METHOD AND SYSTEM FOR AUTOMATICALLY RAISING PRODUCT FROM A HEATED WELL (D#77,314-F) V. M. BARNES, JR. M. D. LOONEY M. J. RIDDIFORD ABSTRACT A method or system for raising gas and liquid from a well used in in situ heating of a formation. Such heating may be done by radio frequency having an appro- priate wave length in the earth e.g. about fifteen meters. The well has a production tube suspended from the well head. And, the method steps include sweeping the annulus with dry gas to drive the products up the production tube, at low flow. Also, another step is that of measuring the pressure differential between the annulus and the outlet of the production tube. And, another step is that of incresing the flow of the dry gas whenever the pressure differential exceeds a prede- termined minimum. The increased flow is continued for an interval long enough to clear the liquid product that has risen in the tube and caused the differential pressure increase. ptn82 -I-

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