US 12,404,211 B2
Use of graphene to enhance stability and density control of cement slurries
Samuel J. Lewis, Houston, TX (US); Thomas Jason Pisklak, Houston, TX (US); and Claudia Pineda, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on May 29, 2024, as Appl. No. 18/677,530.
Application 18/677,530 is a division of application No. 17/892,790, filed on Aug. 22, 2022, granted, now 12,065,377.
Prior Publication US 2024/0308907 A1, Sep. 19, 2024
Int. Cl. C04B 14/02 (2006.01); C04B 28/04 (2006.01); C04B 40/00 (2006.01); C09K 8/467 (2006.01); E21B 33/13 (2006.01)
CPC C04B 14/022 (2013.01) [C04B 28/04 (2013.01); C04B 40/0046 (2013.01); C09K 8/467 (2013.01); E21B 33/13 (2013.01); C04B 2201/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cement slurry comprising:
(1) a mixture comprising:
(i) graphene, wherein the graphene comprises bioderived renewable graphene (BRG),
(ii) a cementitious material, and
(iii) water; and
(2) up to 400% additional dilution water, wherein the cement slurry comprises from about 0.01 to about 20 percent graphene by weight of cementitious material (% graphene bwoc), and
wherein the cement slurry, before and after dilution, has enhanced stability, as evidenced by a uniform density of the slurry and a reduction in free fluid, according to API 10B-2, relative to a same cement slurry absent the graphene.