Patent SG-11201807362S-A (SG)
Title: Modification of bentonite properties for drilling fluids
Inventor: AL-SHAFEL MANSOUR
IPC: C09K8/03
Filed: 2017-03-31
Abstract: 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 2017/173207 Al 5 October 2017 (05.10.2017) WIPO I PCT 111111111111110111011111111111010111110111010111110111010111111111111111111110111111 W O 20 1717 / 3 207 Al (51) International Patent Classification: C09K 8/03 (2006.01) CO9C 1/42 (2006.01) (21) International Application Number: PCT/US2017/025253 (22) International Filing Date: 31 March 2017 (31.03.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 15/088,990 1 April 2016 (01.04.2016) US (71) Applicant: SAUDI ARABIAN OIL COMPANY [SA/SA]; 1 Eastern Avenue, Dhahran 31311 (SA). (71) Applicant AG only): ARAMCO SERVICES COM- PANY [US/US]; 9009 West Loop South, Houston, TX 77096 (US). (72) Inventors: AL-SHAFEL, Mansour, A.; P.O. Box 8617, Saudi Arabian Oil Company-Saudi Aramco, Dhahran 31311 (SA). ALFLIOW, Akram, A.; Saudi Arabian Oil Company, P.O. Box 7126, Saudi Aramco, Dhahran 31311 (SA). AL-MOFLEH, Awad, M.; Saudi Arabian Oil Com- pany, P.O. Box 01601, Saudi Aramco, Dhahran 31311 (SA). AL-AAMRI, Jamal, M.; Saudi Arabian Oil Com- pany, P.O. Box 5000, Saudi Aramco, Dhahran 31311 (SA). AZAIDI, Syed Rehan, Ahmad; Saudi Arabian Oil Com- pany, P.O. Box 62, Saudi Aramco, Dhahran 31311 (SA). AL-TUWAILIB, Amer, A.; Saudi Arabian Oil Company, P.O. Box 12468, Saudi Aramco, Dhahran 31311 (SA). (74) Agent: RHEBERGEN, Constance, Gall; Bracewell LLP, P.O. Box 61389, Houston, TX 77208-1389 (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. [Continued on next page] — (54) Title: MODIFICATION OF BENTONITE PROPERTIES FOR DRILLING FLUIDS loo (57) : Disclosed is a method for modifying bentonite to allow the bentonite to be useful in drilling mud applications. The method includes the steps of: pre- paring bentonite local to Saudi Arabia using raw water to remove contaminants from the bentonite; grinding the bentonite to a fme powder; sieving the fme powder to be between about 50 p.m and about 150 p.m in particle size to produce a sieved fme powder; mixing the sieved fine powder with polyanionic cellulose polymer to produce a modified bentonite composition; adding the modified bentonite composition to water until a homogeneous solu- tion of modified bentonite in water is formed; and allowing the homogeneous solution of modified bentonite in water to rest for about 16 hours to form a composition useful in drilling mud applications. FIG. 1 WO 2017/173207 Al MIDEDIMOMOIDEIRMEMOMMIIIMMIERVOIMIE (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))