Patent ID: 11945992
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 0:
1. A drilling fluid composition comprising:
a latex comprising a first polymer and a second polymer dispersed in water, wherein:
a molar ratio of the first polymer to the second polymer in the drilling fluid composition is about 1:1;
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:, 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.