Patent AU-2011365998-B2 (AU)
Title: Oil well drilling fluids, oil well cement composition, and slurry of weighting material comprising ilmenite
Inventor: AL-BAGOURY MOHAMED
IPC: C09K8/00
Filed: 2011-11-21
Granted: 2014-01-30
Abstract: (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 W O 2013/009187 Al 17 January 2013 (17.01.2013) W IPO I POT (51) International PatentClassification: (81) Designated States (unless otherwise indicated, for every C09K 8/48 (2006.01) C09K8104 (2006.01) kind ofnational protection available): AE, AG, AL, AM, C09K/3 (2006.01) AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, (21) International Application Number CA, CI, CL. CN, CO, CR, CU, CZ, DE, UK, DM, DO, DZ, EC, FEE EG, ES, FEI, G, G), GE, GHI GM, UT, TN, PCT/NO2011/000327 I-IR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, (22) International Filing Date: KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, 21 November 2011 (21.11.2011) MG, MK, MN. MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, (25) FIling Language: English SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, (26) Publication Language: English TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (30) Priority Data: (84) Designated States (unless otherwise indicated, for ewtr 20111012 l'July2011 (l1.07.2011) NO kind ofregioalpteclton available): ARIPO (BW, GHl, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, (71) Applicant (for all designated States except US): ELKEM UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, MD, RU, AS [NO/NO]; Hoffisveien 65B, N-0377 Oslo (NO). TJ, TM). European (AL, AT, BE, BG, Cii, CY, CZ, DE, (72) Inventors; and UK, EE, ES, Fl, FR, GB, OR, HR, HU, IE, IS, IT, LT, LU, (75) Inventors/Applicants (for US ony: AL-BAGOURY, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, Mohamed [EG/NO]; Haakonsensvei IA, N-46 6 Kristi- SM, TR), OAPI (BF, BJ, CF, CG, CL, CM, GA, GN, GQ, ansand S (NO). DRYSDALE STEELE, Christopher GWMLMRNESN,TDTO). [613/GB; 26 Church RD, Strathkinness Fire KYJ6 9XX Published: (GBw ith international search report (Art. 21(3)) (74) Agent: VINDENES, Magne; Elkem Solar AS, Research, IP Department, P.O. Box 8040 Vaagsbygd, N-4675 Ktisti ansand S (NO). (54) Title: OIL WELL DRILLING FLUIDS, OIL WELL CEMENT COMPOSITION, AND SLURRY OF WEIGIITING MATERI - AL COMPRISING ILMENITE oo (57) Abstract: The present invention relates to oil well drilling comprising a weighting agent consisting of microfue, particulate il nmnite having a FeTiO3 content of at least 85% by weight, a specific surface area (BIFT) between I and 5 m2/g, where 90% by volume of the particles have a size of less than 12.5pm and a D50 between 3pm and 6pm by volume measured by laser dili-action I using Malvern laser diffraction particle size analyzer, where the particles have an average circularity of at least 0.85 determined by T image analysis. The invention further relates to high density oil well cement slurry comprising water, Portland cenment, a weighting o material and optionally silica flour, microsilica, fiber, rubbery particles a fluid loss addition and a retarder, where the weighting ma N4 trial is particulate inicrotine ilmenite having a FeTiO3 content of at least 85% by weight, a specific surface area (BET) between I and 5 m2/g, and where 90% by volume ofthe particles have a size of less than 125pm and a D50 between 3 and 6pm measured by laser diffaction using Malvern laser diffaction particle size analyzer, and where the particles have an average circularity of at least 0.85 determined by image analysis. Finally, the invention relates to a slury of micro line ilmenite.