(19)
(11) EP 1 440 220 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
03.05.2006 Bulletin 2006/18

(45) Mention of the grant of the patent:
01.02.2006 Bulletin 2006/05

(21) Application number: 02786427.1

(22) Date of filing: 16.10.2002
(51) International Patent Classification (IPC): 
E21B 31/107(2006.01)
E21B 43/30(2006.01)
E21B 31/113(2006.01)
E21F 7/00(2006.01)
(86) International application number:
PCT/US2002/033128
(87) International publication number:
WO 2003/038233 (08.05.2003 Gazette 2003/19)

(54)

AN ENTRY WELL WITH SLANTED WELL BORES AND METHOD

ZUGANGSBOHRLOCH MIT SCHRÄGBOHRLÖCHERN UND VERFAHREN

PUITS D'ENTR E COMPORTANT DES PUITS DE FORAGE INCLIN S ET PROC D ASSOCI


(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

(30) Priority: 30.10.2001 US 4316

(43) Date of publication of application:
28.07.2004 Bulletin 2004/31

(73) Proprietor: CDX Gas, LLC
Dallas, TX 75254-7672 (US)

(72) Inventor:
  • ZUPANICK, Joseph, A.
    Pineville, WV 24874 (US)

(74) Representative: Lawrence, John 
Barker Brettell, 138 Hagley Road, Edgbaston
Birmingham B16 9PW
Birmingham B16 9PW (GB)


(56) References cited: : 
WO-A-99/60248
GB-A- 2 347 157
US-A- 5 447 416
US-A1- 2001 015 574
FR-A- 964 503
US-A- 3 934 649
US-A- 6 050 335
US-B1- 6 280 000
   
  • BREANT P: "DES PUITS >CHEZ TOTAL: LES PUITS MULTI-DRAINS. UNE NOUVELLE TECHNOLOGIE DE FORAGE AU SERVICE D'UN DEVELOPPEMENT OPTIMISE DES RESERVES D'HYDROCARBURES" PETROLE ET TECHNIQUES, ASSOCIATION FRANCAISE DES TECHNICIENS DU PETROLE. PARIS, FR, no. 418, January 1999 (1999-01), pages 42-46, XP000846928 ISSN: 0152-5425
  • TAYLOR R W ET AL: "MULTILATERAL TECHNOLOGIES INCREASE OPERATIONAL EFFICIENCIES IN MIDDLE EAST" OIL AND GAS JOURNAL, PENNWELL PUBLISHING CO. TULSA, US, vol. 96, no. 11, 16 March 1998 (1998-03-16), pages 76-80, XP000767362 ISSN: 0030-1388
  • PASICZYNK A: "EVOLUTION SIMPLIFIES MULTILATERAL WELLS" PETROLEUM ENGINEER INTERNATIONAL, HART PUBLICATIONS, US, vol. 73, no. 6, June 2000 (2000-06), pages 53-55, XP000969304 ISSN: 0164-8322
  • "MULTILATERAL SYSTEM WITH FULL RE-ENTRY ACCESS INSTALLED" WORLD OIL, GULF PUBLISHING CO. HOUSTON, US, vol. 217, no. 6, 1 June 1996 (1996-06-01), page 29 XP000596577 ISSN: 0043-8790
  • JACKSON P ET AL: "Reducing long term methane emissions resulting from coal mining" ENERGY CONVERSION AND MANAGEMENT, ELSEVIER SCIENCE PUBLISHERS, OXFORD, GB, vol. 37, no. 6, 8 June 1996 (1996-06-08), pages 801-806, XP004039694 ISSN: 0196-8904
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).