US 12,325,822 B2
Compositions and methods for well cementing
Bipin Jain, Sugar Land, TX (US); and Shameed Ashraf, Kuala Lumpur (MY)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Jan. 23, 2024, as Appl. No. 18/419,997.
Application 18/419,997 is a division of application No. 17/643,703, filed on Dec. 10, 2021, granted, now 11,920,079.
Prior Publication US 2024/0158686 A1, May 16, 2024
Int. Cl. C09K 8/473 (2006.01); C04B 14/36 (2006.01); C04B 22/06 (2006.01); C04B 24/26 (2006.01); C04B 24/30 (2006.01); C04B 24/38 (2006.01); C04B 24/42 (2006.01); C04B 28/04 (2006.01); C04B 103/40 (2006.01); C09K 8/48 (2006.01); E21B 33/14 (2006.01)
CPC C09K 8/473 (2013.01) [C04B 14/368 (2013.01); C04B 22/064 (2013.01); C04B 24/2611 (2013.01); C04B 24/30 (2013.01); C04B 24/38 (2013.01); C04B 24/42 (2013.01); C04B 28/04 (2013.01); C09K 8/48 (2013.01); E21B 33/14 (2013.01); C04B 2103/408 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A composition, comprising:
an aqueous cement slurry; and
a non-aqueous additive comprising:
a suspension of an expanding agent comprising calcium oxide or a mixture of calcium oxide and calcined magnesium oxide; and
a viscosifying agent comprising hydrophobically modified biopolymers, the hydrophobically modified biopolymers comprising:
acetone-formaldehyde-sodium-bisulfate polymer; and
D-Glucopyranuronic acid, polymer with 6-deoxy-L-mannose, D-glucose, and D-mannose, calcium potassium sodium salt.