Invention Grant
- Patent Title: Method for removing iron sulfide scale
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Application No.: US14993563Application Date: 2016-01-12
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Publication No.: US09783728B2Publication Date: 2017-10-10
- Inventor: Mohamed Ahmed Nasreldin Mahmoud , Badr Salem Ba Geri , Ibnelwaleed A. Hussein
- Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
- Applicant Address: SA Dhahran
- Assignee: King Fahd University of Petroleum and Minerals
- Current Assignee: King Fahd University of Petroleum and Minerals
- Current Assignee Address: SA Dhahran
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Main IPC: E21B37/06
- IPC: E21B37/06 ; C09K8/528 ; C09K8/532
Abstract:
A method of removing an iron sulfide scale from a surface in fluid communication with a wellbore and/or subterranean formation comprising contacting the iron sulfide scale on the surface with a composition to dissolve the iron sulfide scale in the composition. The composition comprises (a) at least one chelating agent selected from the group consisting of DTPA, EDTA, HEDTA, GLDA, CDTA, and MGDA, and salts thereof, and (b) at least one converting agent selected from the group consisting of potassium carbonate (K2CO3), potassium formate (HCOOK), potassium hydroxide (KOH), potassium chloride (KCl), cesium formate (HCOOCs), and cesium chloride (CsCl). In the composition, the weight ratio of (a):(b) lies in the range 7-60:2-20.
Public/Granted literature
- US20170198198A1 METHOD FOR REMOVING IRON SULFIDE SCALE Public/Granted day:2017-07-13
Information query
