Low fluid loss additive composition

Claim 2

A composition useful in the treatment of subterranean formations comprising discrete particles of a homogeneous solid solution consisting essentially of (1) about 30 to 75 weight percent of wax; (2) about 10 to 25 weight percent of an oil-soluble polyhydroxy higher fatty acid partial ester surface active agent; (3) about 15 to 35 weight percent of a water-dispersible surface active agent selected from the group consisting of polyoxyethylene alkyl phenols, polyethylene glycol higher fatty acid esters, polyoxyethylene polyhydroxy higher fatty acid esters, polyoxyethylene tertiary fatty amines, and polyoxyethylene fatty amide condensates; and about 0.5 to 5 weight percent of a fatty alcohol having 10 to 14 carbon atoms.

Claim 3

The composition defined in claim 1 wherein said particles have an average diameter between about 0.1 micron and about 1/2 inch.

Claim 4

The composition defined in claim 1 wherein said homogeneous solid solution consists essentially of about 45 to 55 weight percent of said wax; (2) about 15 to 20 weight percent of said oil-soluble surface active agent; (3) about 25 to 30 weight percent of said water-dispersible surface active agent; and (4) about 1 to 4 weight percent of said fatty alcohol.

Claim 5

The composition defined in claim 1 wherein said wax is selected from the group consisting of (1) paraffin wax melting between about 125° and 170° F., (2) long chain aliphatic hydrocarbon and oxidized hydrocarbon wax melting above about 170° F. and (3) mixtures of (1) and (2).

Claim 6

The composition defined in claim 4 wherein said long chain aliphatic hydrocarbon and oxidized hydrocarbon wax melts between about 195° and 250° F.

Claim 7

The composition defined in claim 4 wherein said wax is Fischer-Tropsch wax.

Claim 8

The composition defined in claim 4 wherein said wax is a mixture of paraffin wax and oxidized hydrocarbon wax melting above about 170° F.

Claim 9

A composition useful in the treatment of subterranean formations comprising discrete particles of a homogeneous solid solution consisting essentially of (1) about 30 to 75 weight percent of wax; (2) about 10 to 25 weight percent of a glyceryl, mannityl, or sorbitan partial ester of a saturated fatty acid having 12 to 20 carbon atoms, or mixtures thereof; and (3) about 15 to 35 weight percent of a water-dispersible surface active agent selected from the group consisting of mono- and di-alkyl phenols having about 6 to 16 carbon atoms in the alkyl group and about 5 to 150 mol equivalents of ethylene oxide, esters of polyethylene glycol having molecular weights of about 300 to 10,000 and saturated fatty acids having 12 to 20 carbon atoms, polyoxyethylene glyceryl and sorbitan mono- and di- esters of saturated fatty acids having about 12 to 20 carbon atoms and about 5 to about 150 mol equivalents of ethylene oxide, tertiary amine condensation products of saturated primary fatty amines containing about 12 to 20 carbon atoms and about 12 to 60 mol equivalents of ethylene oxide per mole of amine, and condensation products of stearic amide and about 15 to 60 moles of ethylene oxide per mole of amide; and about 0.5 to 5 weight percent of a fatty alcohol having 10 to 14 carbon atoms.

Claim 10

A composition useful in the treatment of subterranean formations comprising discrete particles of a homogeneous solid solution consisting essentially of (1) about 30 to 75 weight percent of wax; (2) about 10 to 25 weight percent of a glyceryl, mannityl, or sorbitan partial ester of a saturated fatty acid having 12 to 20 carbon atoms, or mixtures thereof; and (3) about 15 to 35 weight percent of a water-dispersible surface active agent selected from the group consisting of mono- and di-alkyl phenols having about 6 to 16 carbon atoms in the alkyl group and about 5 to 150 mol equivalents of ethylene oxide, esters of polyethylene glycol having molecular weights of about 300 to 10,000 and saturated fatty acids having 12 to 20 carbon atoms, polyoxyethylene glyceryl and sorbitan mono- and di- esters of saturated fatty acids having about 12 to 20 carbon atoms and about 5 to about 150 mol equivalents of ethylene oxide, tertiary amine condensation products of saturated primary fatty amines containing about 12 to 20 carbon atoms and about 12 to 60 mol equivalents of ethylene oxide per mole of amine, and condensation products of stearic amide and about 15 to 60 moles of ethylene oxide per mole of amide; and about 0.5 to 5 weight percent of a fatty alcohol having 10 to 14 carbon atoms.

Claim 11

The composition defined in claim 8 wherein said particles have an average diameter between about 0.1 micron and about 1/2 inch.

Claim 12

The composition defined in claim 8 wherein said homogeneous solid solution consists essentially of about 45 to 55 weight percent of said wax; (2) about 15 to 20 weight percent of said oil-soluble surface active agent; (3) about 25 to 30 weight percent of said water-dispersible surface active agent; and (4) about 1 to 4 weight percent of said fatty alcohol.

Claim 13

The composition defined in claim 8 wherein said wax is selected from the group consisting of (1) paraffin wax melting between about 125° and 170° F., (2) long chain aliphatic hydrocarbon and oxidized hydrocarbon wax melting above about 170° F. and (3) mixtures of (1) and (2).

Claim 14

The composition defined in claim 11 wherein said long chain aliphatic hydrocarbon and oxidized hydrocarbon wax melts between about 195° and 250° F.

Claim 15

The composition defined in claim 11 wherein said wax is Fischer-Tropsch wax.

Claim 16

The composition defined in claim 11 wherein said wax is a mixture of paraffin wax and oxidized hydrocarbon wax melting above about 170° F.

Claim 17

A composition useful in the treatment of subterranean formations comprising discrete particles of a homogeneous solid solution consisting essentially of (1) about 1 to 25 weight percent of paraffin wax melting between about 125° and 170° F.; (2) about 20 to 54 weight percent of long chain aliphatic hydrocarbon and oxidized hydrocarbon wax melting above about 170° F. wherein the total wax content is about 45 to 55 weight percent; (3) about 15 to 20 weight percent of glyceryl monostearate, sorbitan monostearate, or mixtures thereof; (4) about 25 to 30 weight percent of polyoxyethylene glyceryl or sorbitan partial esters of stearic acid containing about 5 to 150 mol equivalents of ethylene oxide; and (5) about 1.5 to 2.5 weight percent of lauryl alcohol.

Claim 18

A composition useful in the treatment of subterranean formations comprising discrete particles of a homogeneous solid solution consisting essentially of (1) about 1 to 25 weight percent of paraffin wax melting between about 125° and 170° F.; (2) about 20 to 54 weight percent of long chain aliphatic hydrocarbon and oxidized hydrocarbon wax melting above about 170° F. wherein the total wax content is about 45 to 55 weight percent; (3) about 15 to 20 weight percent of glyceryl monostearate, sorbitan monostearate, or mixtures thereof; (4) about 25 to 30 weight percent of polyoxyethylene glyceryl or sorbitan partial esters of stearic acid containing about 5 to 150 mol equivalents of ethylene oxide; and (5) about 1.5 to 2.5 weight percent of lauryl alcohol.

Claim 19

The composition defined in claim 15 wherein said particles have an average diameter of about 0.1 to 50 microns.

Claim 20

The composition defined in claim 15 wherein said long chain aliphatic hydrocarbon and oxidized hydrocarbon wax melts between about 195° and 250° F.

Claim 21

The composition defined in claim 17 wherein said long chain aliphatic hydrocarbon and oxidized hydrocarbon wax is Fischer-Tropsch wax.