CURVED FLAPPER SEAL WITH STEPPED INTERMEDIATE SURFACE

(19)

(11)

EP 2 859 258 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:
	20.12.2017 Bulletin 2017/51

(45)	Mention of the grant of the patent:
	15.11.2017 Bulletin 2017/46

(21)	Application number: 13800652.3

(22)	Date of filing: 05.06.2013

(51)

International Patent Classification (IPC):

F16K 1/18^(2006.01)
E21B 34/10^(2006.01)
E21B 33/00^(2006.01)

F16K 1/42^(2006.01)
F16K 15/03^(2006.01)
E21B 34/00^(2006.01)

(86)	International application number:
	PCT/US2013/044205

(87)	International publication number:
	WO 2013/184737 (12.12.2013 Gazette 2013/50)

(54)	CURVED FLAPPER SEAL WITH STEPPED INTERMEDIATE SURFACE GEKRÜMMTE KLAPPENDICHTUNG MIT GESTUFTER ZWISCHENFLÄCHE JOINT D'ÉTANCHÉITÉ À VOLET INCURVÉ COMPORTANT UNE SURFACE INTERMÉDIAIRE ÉPAULÉE

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)

Priority:

06.06.2012 US 201213490073

(43)	Date of publication of application:
	15.04.2015 Bulletin 2015/16

(73)	Proprietor: Baker Hughes, a GE company, LLC
	Houston, TX 77210 (US)

(72)	Inventors:
	DYER, Robert, J. Coweta, OK 74429 (US) MYERLEY, Thomas, S. Broken Arrow, OK 74014 (US) MILLER, Wade, A. Broken Arrow, OK 74014 (US) PRESLEY, Matthew, P. Tulsa, OK 74014 (US) HAIR, Michael, L. Tulsa, OK 74105 (US)

(74)	Representative: Mabey, Katherine Frances
	Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)

(56)

References cited: :

EP-A2- 1 980 711
US-A- 4 674 575
US-A- 5 607 140
US-B1- 6 263 910

US-A- 4 230 150
US-A- 5 263 847
US-A1- 2008 047 713
US-B2- 7 036 204

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).