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(12) Patent: | (11) CA 2313837 |
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(54) English Title: | POSITIONING OF THE TUBING STRING IN A STEAM INJECTION WELL |
(54) French Title: | POSITIONNEMENT DE LA TIGE DE TUBAGE DANS UN PUITS D'INJECTION DE VAPEUR |
Status: | Expired |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | JOHNSON, ERNEST PETER |
(74) Associate agent: | PARLEE MCLAWS LLP |
(45) Issued: | 2004-09-14 |
(22) Filed Date: | 2000-07-13 |
(41) Open to Public Inspection: | 2002-01-13 |
Examination requested: | 2000-07-13 |
Availability of licence: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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A steam-assisted gravity drainage process, involving a co-operating pair of closely spaced, horizontal steam injection and liquid production wells, is modified as follows: .cndot. during the initial circulation phase, the tubing string is landed at the toe of the injection well; and .cndot. during the following injection phase, the tubing string is landed at the heel or intermediate the heel and toe. It has been found that steam preferentially leaks into the reservoir at heel and toe due to pressure drop arising from friction effects through the annulus, between the tubing string and screened liner. So the steam delivery point through the tubing string during the circulation phase is located at the toe, but it is retracted to the heel or to between heel and toe for the injection phase, to shorten the annulus and thereby lessen the pressure drop.
Un procédé de drainage par gravité à vapeur, impliquant deux puits horizontaux à injection de vapeur et de production de liquide coopérants rapprochés est modifié comme suit : .cndot. au cours de la phase initiale de circulation, la tige de tubage est débarquée au pied du puits d'injection; et .cndot. au cours de la phase d'injection suivante, la tige de tubage est débarquée au niveau de la bande ou intermédiaire entre la bande et le pied. Il a été constaté que de manière préférable, la vapeur s'écoule dans le réservoir à la bande et au pied en raison de la chute de pression provoquée par les effets de la friction à travers l'annulaire, entre la tige de tubage et le tube crépiné. Ainsi, le point de distribution de vapeur par la tige de tubage au cours de la phase de circulation se trouve au pied, mais rétracté à la bande ou entre le pied et la bande pour la phase d'injection, afin de réduire l'annulaire et diminuer ainsi la chute de pression.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee and Payment History should be consulted.
Title | Date |
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Forecasted Issue Date | 2004-09-14 |
(22) Filed | 2000-07-13 |
Examination Requested | 2000-07-13 |
(41) Open to Public Inspection | 2002-01-13 |
(45) Issued | 2004-09-14 |
Expired | 2020-07-13 |
There is no abandonment history.
Fee Type | Anniversary Year | Due Date | Amount Paid | Paid Date |
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Request for Examination | $200.00 | 2000-07-13 | ||
Application Fee | $150.00 | 2000-07-13 | ||
Registration of a document - section 124 | $100.00 | 2000-08-28 | ||
Maintenance Fee - Application - New Act | 2 | 2002-07-15 | $100.00 | 2002-05-08 |
Maintenance Fee - Application - New Act | 3 | 2003-07-14 | $100.00 | 2003-07-11 |
Final Fee | $300.00 | 2004-06-07 | ||
Maintenance Fee - Application - New Act | 4 | 2004-07-13 | $100.00 | 2004-06-07 |
Maintenance Fee - Patent - New Act | 5 | 2005-07-13 | $200.00 | 2005-05-13 |
Maintenance Fee - Patent - New Act | 6 | 2006-07-13 | $200.00 | 2006-06-14 |
Expired 2019 - Corrective payment/Section 78.6 | $350.00 | 2006-10-03 | ||
Maintenance Fee - Patent - New Act | 7 | 2007-07-13 | $200.00 | 2007-06-18 |
Maintenance Fee - Patent - New Act | 8 | 2008-07-14 | $200.00 | 2008-07-07 |
Maintenance Fee - Patent - New Act | 9 | 2009-07-13 | $200.00 | 2009-06-15 |
Maintenance Fee - Patent - New Act | 10 | 2010-07-13 | $250.00 | 2010-05-27 |
Maintenance Fee - Patent - New Act | 11 | 2011-07-13 | $250.00 | 2011-06-06 |
Maintenance Fee - Patent - New Act | 12 | 2012-07-13 | $250.00 | 2012-06-18 |
Maintenance Fee - Patent - New Act | 13 | 2013-07-15 | $250.00 | 2013-07-03 |
Maintenance Fee - Patent - New Act | 14 | 2014-07-14 | $250.00 | 2014-07-03 |
Maintenance Fee - Patent - New Act | 15 | 2015-07-13 | $450.00 | 2015-06-25 |
Maintenance Fee - Patent - New Act | 16 | 2016-07-13 | $450.00 | 2016-05-30 |
Maintenance Fee - Patent - New Act | 17 | 2017-07-13 | $450.00 | 2017-06-13 |
Maintenance Fee - Patent - New Act | 18 | 2018-07-13 | $450.00 | 2018-06-25 |
Maintenance Fee - Patent - New Act | 19 | 2019-07-15 | $450.00 | 2019-06-27 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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JAPAN CANADA OIL SANDS LIMITED |
Past Owners on Record |
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ITO, YOSHIAKI |