Pourable wetting agents and methods associated therewith
Pourable wetting agent compositions include a first condensation reaction product having a structure represented by the formula R″—NH—CH 2 —(CH 2 NR″CH 2 ) a —CH 2 —C 3 H 4 N 2 —R′; wherein a is 0 or a positive integer; R′ is a C 6 -C 30 hydrocarbyl group; and R″ is-CO—R′ or —CO-A-COOH, provided that at least one occurrence of R″ is-CO-A-COOH; wherein A is a divalent hydrocarbyl group.
1 . A composition comprising:
a first condensation reaction product having a structure represented by
wherein:
a is 0 or a positive integer;
R′ is a C 6 -C 30 hydrocarbyl group; and
R″ is-CO—R′ or —CO-A-COOH, provided that at least one occurrence of R″ is —CO-A-COOH;
wherein A is a divalent hydrocarbyl group;
a second condensation reaction product having a structure represented by
wherein:
b is a positive integer;
R′ is a C 6 -C 30 hydrocarbyl group; and
R″ is-CO—R′ or —CO-A-COOH, provided that at least one occurrence of R″ is-CO-A-COOH; and
wherein the first condensation product and the second condensation product have a ratio from about 100:0 to about 31:69.
2 . The composition of claim 1 , wherein b is 1, 2, or 3.
3 . The composition of claim 1 , wherein A is a C 1 -C 3 alkyl group, a C 2 -C 3 alkenyl group, or a C 2 -C 3 alkynyl group.
4 . The composition of claim 1 , wherein R′ is a C 6 -C 30 alkyl group.
5 . The composition of claim 1 , wherein a is 0, 1, or 2.
6 . A drilling fluid comprising:
an invert emulsion comprising an oil and water; and
the composition of claim 1 .
7 . The drilling fluid of claim 6 , further comprising:
an additive comprising at least one material selected from the group consisting of a primary emulsifier, a viscosifier, a weighting material, a fluid-loss control additive, an alkaline compound, and any combination thereof.
8 . A drilling method comprising:
operating a drill in a wellbore in the presence of the drilling fluid of claim 6 .