The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2011
Filed:
Sep. 03, 2008
Kenneth W. Lowe, Calgary, CA;
Javier Alfonso Becaria Valero, Calgary, CA;
Clarence Robert Dyck, Medicine Hat, CA;
Kenneth W. Lowe, Calgary, CA;
Javier Alfonso Becaria Valero, Calgary, CA;
Clarence Robert Dyck, Medicine Hat, CA;
EnCana Corporation, Calgary, Alberta, CA;
Abstract
A gas flow system for removing a liquid from a well bore and allowing for gas production is provided. The gas flow system comprises a casing in the well bore for allowing flow of the liquid and gas; a tubing string in the casing for allowing flow of the liquid and gas; pressure measurement devices for use in determining a rate of liquid influx into the well bore; a casing control valve moveable between various positions ranging from fully open to fully closed for controlling flow through the casing; a tubing control valve moveable between various positions ranging from fully open to fully closed for controlling flow through the tubing; and flow measurement devices for determining the rate of flow through the tubing and the total rate of flow. The system is switchable between a current production phase and an alternate production phase based on the determined rate of liquid influx, a tubing critical velocity and a gas flow rate through the tubing, wherein switching from a current production phase to an alternate production phase results in the either or both of a decrease in liquid build-up in the well bore and an increase in gas production rate and wherein the current production phase differs from the alternate production phase.