US 12,291,670 B2
Compositions and methods for branched calcium lignosulfonate cement dispersants
Khawlah A. Alanqari, Dhahran (SA); Abdullah Al-Yami, Dhahran (SA); Vikrant Wagle, Abqaiq (SA); and Ali Alsafran, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Feb. 8, 2023, as Appl. No. 18/166,343.
Prior Publication US 2024/0279529 A1, Aug. 22, 2024
Int. Cl. C09K 8/467 (2006.01); C04B 7/02 (2006.01); C04B 24/00 (2006.01); C04B 24/02 (2006.01); C04B 24/18 (2006.01); C04B 24/40 (2006.01); C04B 28/04 (2006.01); C04B 103/40 (2006.01)
CPC C09K 8/467 (2013.01) [C04B 7/02 (2013.01); C04B 24/008 (2013.01); C04B 24/02 (2013.01); C04B 24/18 (2013.01); C04B 24/40 (2013.01); C04B 28/04 (2013.01); C04B 2103/408 (2013.01); C04B 2201/20 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method comprising:
introducing a cement slurry into a wellbore penetrating a subterranean formation;
wherein the cement slurry comprises a lignosulfonate-based cement dispersant, a cement, and water;
wherein the lignosulfonate-based cement dispersant comprises a calcium lignosulfonate salt having 2 to 10 syringyl groups and no guaiacyl groups, an alcohol, an aldehyde, and water;
wherein the alcohol is selected from the group consisting of methanol, ethanol, propanol, iso-butanol, t-butanol, and any combination thereof; and
wherein the aldehyde is selected from the group consisting of formaldehyde, acetaldehyde, propanal, butanal, and any combination thereof; and
allowing the cement slurry to set to a concrete in a downhole zone of interest.