(19)
(11) EP 2 753 795 A1

(12)

(43) Date of publication:
16.07.2014 Bulletin 2014/29

(21) Application number: 12830293.2

(22) Date of filing: 28.06.2012
(51) International Patent Classification (IPC): 
E21B 43/28(2006.01)
E21B 43/22(2006.01)
(86) International application number:
PCT/US2012/044626
(87) International publication number:
WO 2013/036316 (14.03.2013 Gazette 2013/11)
(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: 07.09.2011 US 201113226717

(71) Applicant: E. I. Du Pont de Nemours and Company
Wilmington, Delaware 19899 (US)

(72) Inventors:
  • ALSOP, Albert W.
    Wilmington, Delaware 19803 (US)
  • JACKSON, Scott Christopher
    Wilmington, Delaware 19803 (US)
  • FALLON, Robert D.
    Elkton, Maryland 21921 (US)

(74) Representative: Matthews, Derek Peter 
Dehns St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) REDUCING SULFIDE IN PRODUCTION FLUIDS DURING OIL RECOVERY