US 11,713,410 B1
Polymer-based latex for cementing fluids
Abdullah Saleh Hussain Al-Yami, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Aug. 4, 2022, as Appl. No. 17/880,956.
Int. Cl. E21B 43/16 (2006.01); C09K 8/46 (2006.01)
CPC C09K 8/46 (2013.01) 16 Claims
OG exemplary drawing
 
1. A cementing fluid composition comprising:
a latex comprising a first polymer and a second polymer dispersed in water, wherein:
the first polymer comprises polyvinyl alcohol and polyvinyl acetate, wherein a molar concentration of the polyvinyl alcohol in the first polymer is greater than 80% and less than 100%; and
the second polymer is derived from styrene, butadiene, and a carboxylic acid and has the general structure:

OG Complex Work Unit Chemistry
wherein:
a sum of x, y, and z is equal to s,
x is in a range of from about 20% to about 30% of s,
y is in a range of from about 70% to about 80% of s, and
z is in a range of from about 1% to about 5% of s; and
a cement comprising calcium oxide, silicon dioxide, aluminum oxide, iron oxide, and gypsum, wherein a concentration of the cement in the cementing fluid composition is in a range of from about 50 weight percent (wt. %) to about 80 wt. %, and a concentration of the latex in the cementing fluid composition is in a range of from about 1 wt. % to about 15 wt. %.