DRILLING FLUID
Disclosed herein are drilling fluid compositions suitable for use, for example, in drilling a well bore through a subterranean formation and other oil and gas operations. The drilling fluid compositions of the present disclosure include the condensation product of a trifunctional amine and a fatty acid and an oil base fluid. The present disclosure also described processes for preparing drilling fluid compositions.
1 .- 20 . (canceled)
21 . A process of drilling a wellbore, the process comprising:
disposing into the wellbore a drilling fluid composition comprising from 0.1 wt. % to 10 wt. % of a condensation product of a trifunctional amine and a fatty acid and an oil base fluid;
wherein the weight ratio of the trifunctional amine to the fatty acid in the condensation product ranges from 0.1:1 to 10:1.
22 . The process of claim 21 , wherein the weight ratio of the trifunctional amine to the fatty acid in the condensation product is from 0.3:1 to 2:1.
23 . The process of claim 21 , wherein the condensation product corresponds to Formula 1:
wherein R 1 is an alkyl group, alkene group, or alkyne group of 8 to 24 carbons,
R 2 is an alkyl group, alkene group, or alkyne group of 1 to 10 carbons,
R 3 is an alkyl group, alkene group, or alkyne group of 1 to 10 carbons,
R 4 is an amino group of 1 to 10 carbons.
24 . The process of claim 21 , wherein the condensation product corresponds to Formula 2b:
25 . The process of claim 21 , wherein the drilling fluid composition demonstrates a plastic viscosity greater than 15 cP at 25° C.
26 . The process of claim 21 , wherein the drilling fluid composition demonstrates a plastic viscosity greater than 10 cP at 80° C.
27 . The process of claim 21 , wherein the drilling fluid composition demonstrates a yield point greater than 15 lb/100 ft 2 at 25° C.
28 . The process of claim 21 , wherein the drilling fluid composition demonstrates a yield point greater than 10 lb/100 ft 2 at 80° C.
29 . The process of claim 21 , wherein the drilling fluid composition demonstrates a ratio of yield point to plastic viscosity less than 2.
30 . The process of claim 21 , further comprising a viscosity modifier, a pH modifier, a density modifier, a filtration modifier, an aqueous component, a shale inhibitor, or combinations thereof.
31 . The process of claim 21 , wherein the oil base fluid comprises a diesel oil, a mineral oil, a linear olefin, a linear paraffin, or combinations thereof.
32 . The process of claim 21 , wherein the trifunctional amine comprises from 6 to 12 carbon atoms.
33 . The process of claim 21 , wherein the trifunctional amine has a chemical formula
C x H y (NH 2 ) 3 ,
wherein x is from 6 to 12; and
wherein y is less than or equal to 23.
34 . The process of claim 21 , wherein the fatty acid comprises palmitic acid, oleic acid, linoleic acid, abietic acid, sapienic acid, palmitoleic acid, myristoleic acid, elaidic acid, vaccenic acid, or tall oil, isomers thereof, or combinations thereof.
35 . A process for drilling oil and gas, the process comprising:
disposing into a wellbore a drilling fluid composition comprising from 0.1 wt. % to 10 wt. % of a condensation product of a trifunctional amine and a fatty acid and an oil base fluid;
wherein the weight ratio of the trifunctional amine to the fatty acid in the condensation product ranges from 0.1:1 to 10:1.
36 . The process of claim 35 , wherein the condensation product corresponds to Formula 1:
wherein R 1 is an alkyl group, alkene group, or alkyne group of 8 to 24 carbons,
R 2 is an alkyl group, alkene group, or alkyne group of 1 to 10 carbons,
R 3 is an alkyl group, alkene group, or alkyne group of 1 to 10 carbons,
R 4 is an amino group of 1 to 10 carbons.
37 . The process of claim 35 , wherein the drilling fluid composition demonstrates a plastic viscosity greater than 15 cP at 25° C.
38 . A process of for drilling oil and gas, the process comprising:
disposing into a wellbore a drilling fluid composition comprising from 0.1 wt. % to 10 wt. % of a condensation product of a trifunctional amine and a fatty acid and an oil base fluid;
wherein the condensation product forms a stable emulsion.
39 . The process of claim 38 , wherein the drilling fluid composition demonstrates a plastic viscosity greater than 15 cP at 25° C.
40 . The process of claim 38 , wherein the condensation product corresponds to Formula 1:
wherein R 1 is an alkyl group, alkene group, or alkyne group of 8 to 24 carbons,
R 2 is an alkyl group, alkene group, or alkyne group of 1 to 10 carbons,
R 3 is an alkyl group, alkene group, or alkyne group of 1 to 10 carbons,
R 4 is an amino group of 1 to 10 carbons.