US 12,359,110 B2
Methods involving cements that employ carbon dioxide as a reactant
Kenneth M. Cowan, Sugar Land, TX (US); Robert L. Zeller, III, Seabrook, TX (US); Elias R. Callahan, III, El Campo, TX (US); and James S. Willis, Blanco, TX (US)
Assigned to Oxy Low Carbon Ventures, LLC, Houston, TX (US)
Appl. No. 17/600,833
Filed by Oxy Low Carbon Ventures, LLC, Houston, TX (US)
PCT Filed Apr. 1, 2020, PCT No. PCT/US2020/026235
§ 371(c)(1), (2) Date Oct. 1, 2021,
PCT Pub. No. WO2020/206011, PCT Pub. Date Oct. 8, 2020.
Claims priority of provisional application 62/828,169, filed on Apr. 2, 2019.
Prior Publication US 2022/0186103 A1, Jun. 16, 2022
Int. Cl. E21B 33/14 (2006.01); C04B 28/18 (2006.01); C04B 38/10 (2006.01); C04B 40/02 (2006.01); C09K 8/46 (2006.01); E21B 43/34 (2006.01); C04B 111/00 (2006.01)
CPC C09K 8/46 (2013.01) [C04B 28/188 (2013.01); C04B 38/103 (2013.01); C04B 40/0231 (2013.01); E21B 33/14 (2013.01); C04B 2111/00706 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of cementing an annular space between a pipe string and a well bore, the method comprising steps of:
(a) providing a calcium-deficient calcium silicate which has been subjected to a step of grinding such that the calcium-deficient calcium silicate consists of ground calcium silicate, wherein the ground calcium silicate has a median particle size of less than 200 μm;
(b) preparing a cement composition including the calcium-deficient calcium silicate consisting of the ground calcium silicate having the median particle size of less than 200 μm;
(c) mixing the cement composition with water to form a cement slurry;
(d) mixing the cement slurry with carbon dioxide to form a foamed cement; and
(e) placing the foamed cement in the annular space between the pipe string and the wellbore.