WO 2018/174842 A1

Viscosity modifiers and methods of use thereof

(22) 20.03.2017

(43) 27.09.2018

(57) A method of cementing a wellbore comprises injecting into the wellbore a cement slurry comprising an aqueous carrier, a swellable nanoclay, and a solid delayed releasing divalent inorganic salt comprising calcined magnesium oxide, calcined calcium oxide, calcium magnesium polyphosphate„ a borate, a nitride, a silicate, an agent having a cation of Ba2+, Sr2+, Fe2+, Ni2+, or a combination comprising at least one of the foregoing; and allowing the cement slurry to set.

(71) Baker Hughes Incorporated, 17021 Aldine Westfield, Houston, Texas 77073 (US)

(84) 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)

Related articles:

4/2017 WO 2017/017376 A1

Long-workability calcium aluminate cement with hardening ­promoted by a temperature increase, and related use

(22) 27.07.2016 (43) 02.02.2017 (57) The invention relates to a calcium aluminate cement containing a calcium aluminate with a first crystallized mineralogical phase of calcium dialuminate CA2,...

more
9/2016 US 2016/0200959 A1

Wellbore cement compositions and wellbore cementing methods

(22) 21.03.2016 (43) 14.07.2016 (57) A wellbore cement composition includes substantially unhy­drated cement powder and additive powder for cement. The additive powder is formulated from ingredients...

more
5/2016 US 2016/0084037 A1

Cement blends including inert microparticles

(22) 20.09.2013 (43) 24.03.2016 (57) Dry cement blends that include inert microparticles may be used to produce cement slurries with a lower viscosity and a longer aging window. For example, a related...

more
9/2016 US 2016/0207834 A1

Binder comprising calcium sulfoaluminate cement and a magnesium compound

(22) 02.09.2014 (43) 21.07.2016 (57) The present invention relates to a binder comprising calcium sulfoaluminate (CSA) cement and a magnesium compound, to a method of enhancing strength development...

more
11/2017 PL2744766 (T3)

Calciumsulfoaluminate cement or clinker comprising ternesite

(22) 16.07.2012 (43) 29.09.2017 (57) Summary of the corresponding patent EP2559674 (A1): Producing a hydraulically reactive clinker, comprises sintering a raw meal comprising calcium oxide, aluminum...

more