Patent SG-11201807482X-A (SG)
Title: Subsea deoxygenation in a water injection process plant
Inventor: KNOX-HOLMES BRENT
IPC: E21B43/20
Filed: 2017-02-13
Abstract: FigTOPSIDES SUBSEA 10 RAW (UNTREATED, UNFILTERED) SEAWATER STREAM 15 20 COARSE STRAINER 30- BIOFOULING CONTROL (ON SITE OXIDANT GENERATION BY ELECTOLYSIS OR NON-OXIDISING CHEMICAL INJECTION) r 50 CATALYTIC DE OXYGENATION (CDX) 65 DEOXYG EN ATED , SEAWATER STREAM 70 INJECTION PUMP 41 43 ) 45- 1 r 40- \ 47 - FINE FILTRATION (MICROFILTRATION IMF] I OR ULTRAFILTRATION ) SULPHATE ION REMOVAL (NANOFILTRATION MEMBRANES [NF]) REDUCED SALINITY BY REVERSE OSMOSIS (RO) MEMBRANES W O 20 17 / 15 1297 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2017/151297 Al 8 September 2017 (08.09.2017) WIPO I PCT 1111111111111101110111111111110101111101110111111110111011111101111111111111110111111 (51) International Patent Classification: CO2F 1/20 (2006.01) CO2F 103/08 (2006.01) CO2F 1/70 (2006.01) CO2F 1/72 (2006.01) BOlD 19/00 (2006.01) CO2F 1/44 (2006.01) E21B 43/20 (2006.01) CO2F 1/467 (2006.01) (21) International Application Number: PCT/US2017/017604 (22) International Filing Date: 13 February 2017 (13.02.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 15/058,923 2 March 2016 (02.03.2016) US (71) Applicant: CAMERON SOLUTIONS, INC. [US/US]; 1333 West Loop South, Suite 1700, Houston, TX 77027 (US). (72) Inventor: KNOX-HOLMES, Brent; 3 The Wharri, Main Street, East Farndon, Northamptonshire LE16 9SH (GB). (74) Agent: ROSSLER, Paul, E.; Gablegotwals, 100 West 5th Street, Tulsa, OK 74103 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) (54) Title: SUBSEA DEOXYGENATION IN A WATER INJECTION PROCESS PLANT 60 REDUCING AGENT (57) : A water injection process plant includes a catalytic deoxygenation unit (50) located subsea that makes use of a redu - cing agent (60) sent from topsides in liquid form. The catalyst is preferably a palladium catalyst or its equivalent. The reducing agent is an oxygen scavenger such as but not limited to hydrazine, carbohydrazide, sodium erythorbate, methyl ethyl ketoxime (\"MEKO\"), hydroquinone, diethylhydroxylamine (\"DEHA\"), formic acid (methanoic acid). A chemical umbilical (55) can be used to deliver the reducing agent to a mixer (51) located upstream of the deoxygenation unit, where the agent is mixed with seawater containing oxy- gen.