ACOUSTIC TELEMETRY SYSTEM WITH DRILLING NOISE CANCELLATION

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EP 1 185 761 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:
	25.01.2006 Bulletin 2006/04

(21)	Application number: 00944653.5

(22)	Date of filing: 13.06.2000

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International Patent Classification (IPC):

E21B 47/16^(2006.01)

(86)	International application number:
	PCT/US2000/016184

(87)	International publication number:
	WO 2000/077345 (21.12.2000 Gazette 2000/51)

(54)	ACOUSTIC TELEMETRY SYSTEM WITH DRILLING NOISE CANCELLATION AKUSTISCHE FERNMESSANORDNUNG MIT BOHRGERÄUSCHUNTERDRÜCKUNG SYSTEME DE TELEMETRIE ACOUSTIQUE, A SUPPRESSION DU BRUIT DE FORAGE

(84)	Designated Contracting States:
	FR GB

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Priority:

14.06.1999 US 332641

(43)	Date of publication of application:
	13.03.2002 Bulletin 2002/11

(73)	Proprietor: HALLIBURTON ENERGY SERVICES, INC.
	Houston, TX 77072 (US)

(72)	Inventors:
	GARDNER, Wallace, R. Houston, TX 77083 (US) SHAH, Vimal, V. Houston, TX 77079 (US) MINEAR, John, W. Almont, Colorado 81210 (US)

(74)	Representative: Wain, Christopher Paul et al
	A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)

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References cited: :

EP-A- 0 919 696
WO-A-98/48140
US-A- 5 289 354

WO-A-89/10572
US-A- 4 878 206
US-A- 5 321 981

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).