Composition for remediating iron sulfide in oilfield production systems

Patent metadata

Field	Value
Publication number	US-2018148632-A1
Application number	US-201715827466-A
Country	US
Kind code	A1
Filing date	Nov 30, 2017
Priority date	Nov 30, 2016
Publication date	May 31, 2018
Grant date	—

Abstract

A composition for inhibiting corrosion and/or removing hydrocarbonaceous deposits in oil and gas applications is provided. The composition comprises an iron sulfide dissolver, an organic solvent, and a corrosion inhibitor.

First claim

1 . A composition for inhibiting corrosion and/or removing hydrocarbonaceous deposits in oil and gas applications, the composition comprising:
an iron sulfide dissolver comprising allaric acid, altaric acid, altraric acid, altronic acid, arabinaric acid, arabinonic acid, dihomocitric acid, fructuronic acid, fuconic acid, galactaric acid, galactonic acid, galacturonic acid, glucaric acid, glucoheptonic acid, gluconic acid, glucuronic acid, gulonic acid, homocitric acid, homoisocitric acid, idaric acid, idonic acid, iduronic acid, isocitric acid, mannaric acid, mannonic acid, octulosonic acid, rhamnonic acid, ribonic acid, tagaturonic acid, xylonic acid, or xyluronic acid, or a salt or derivative thereof, or a combination thereof; an organic solvent; and a corrosion inhibitor comprising an imidazoline compound, a quaternary ammonium compound, a pyridinium compound, or a combination thereof.

2 . The composition of claim 1 , wherein the iron sulfide dissolver comprises gluconic acid, a salt thereof, or a combination thereof.

3 . The composition of claim 1 , wherein the iron sulfide dissolver comprises sodium gluconate, ammonium gluconate, potassium gluconate, lithium gluconate, magnesium gluconate, calcium gluconate, cesium gluconate, gluconic acid, sodium glucarate, ammonium glucarate, potassium glucarate, lithium glucarate, magnesium glucarate, calcium glucarate, cesium glucarate, glucaric acid, or a combination thereof.

4 . The composition of claim 1 , wherein the iron sulfide dissolver comprises sodium gluconate, ammonium gluconate, potassium gluconate, lithium gluconate, magnesium gluconate, calcium gluconate, cesium gluconate, gluconic acid, or a combination thereof.

5 . The composition of claim 1 , wherein the organic solvent comprises an alcohol, a hydrocarbon, a ketone, an ether, an alkylene glycol, a glycol ether, an amide, a nitrile, a sulfoxide, an ester, a polyol, or a combination thereof, and the composition optionally comprises water.

6 . The composition of claim 1 , wherein the organic solvent comprises methanol, ethanol, propanol, isopropanol, butanol, 2-ethylhexanol, hexanol, octanol, decanol, 2-butoxyethanol, methylene glycol, ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, diethyleneglycol monomethyl ether, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, pentane, hexane, cyclohexane, methylcyclohexane, heptane, decane, dodecane, diesel, toluene, xylene, heavy aromatic naphtha, cyclohexanone, diisobutylketone, diethyl ether, propylene carbonate, N-methylpyrrolidinone, N,N-dimethylformamide, glycerin, or a combination thereof.

7 . The composition of claim 6 , wherein the organic solvent comprises methanol, ethanol, ethylene glycol, glycerin, or a combination thereof.

8 . The composition of claim 1 , wherein the corrosion inhibitor comprises one or more of the following imidazoline compounds:
(A) an imidazoline of Formula (I):

wherein
R 10 is a C 1 -C 20 alkyl or a C 1 -C 20 alkoxyalkyl group;
R 12 and R 13 are independently hydrogen or a C 1 -C 6 alkyl group,
R 11 and R 14 are independently hydrogen, C 1 -C 6 alkyl, C 1 -C 6 hydroxyalkyl, or C 1 -C 6 arylalkyl; and
X − is a halide, carbonate, sulfonate, phosphate, or an anion of an organic carboxylic acid;
or a tautomer thereof;
(B) an imidazolinium salt of Formula (II):

wherein
R 10 is a C 1 -C 20 alkyl or a C 1 -C 20 alkoxyalkyl group;
R 12 and R 13 are independently hydrogen or a C 1 -C 6 alkyl group,
R 11 and R 14 are independently hydrogen, C 1 -C 6 alkyl, C 1 -C 6 hydroxyalkyl, or C 1 -C 6 arylalkyl; and
X − is a halide, carbonate, sulfonate, phosphate, or an anion of an organic carboxylic acid;
or a tautomer thereof;
(C) a bis-quaternized imidazoline compound of Formula (III):

wherein:
R 1 and R 2 are each independently unsubstituted branched, chain or ring alkyl or alkenyl having from 1 to about 29 carbon atoms; partially or fully oxygenized, sulfurized, and/or phosphorylized branched, chain, or ring alkyl or alkenyl having from 1 to about 29 carbon atoms; or a combination thereof;
R 3 and R 4 are each independently unsubstituted branched, chain or ring alkylene or alkenylene having from 1 to about 29 carbon atoms; partially or fully oxygenized, sulfurized, and/or phosphorylized branched, chain, or ring alkylene or alkenylene having from 1 to about 29 carbon atoms; or a combination thereof;
L 1 and L 2 are each independently absent, H, —COOH, —SO 3 H, —PO 3 H 2 , —COOR 5 , —CONH 2 , —CONHR 5 , or —CON(R 5 ) 2 ;
R 5 is each independently a branched or unbranched alkyl, aryl, alkylaryl, alkylheteroaryl, cycloalkyl, or heteroaryl group having from 1 to about 10 carbon atoms;
n is 0 or 1, and when n is 0, L 2 is absent or H;
x is from 1 to about 10; and
y is from 1 to about 5; or
(D) a combination thereof.

9 . The composition of claim 8 , wherein either:
the corrosion inhibitor comprises the imidazoline of Formula (I) or the imidazolinium salt of Formula (II), R 10 is an alkyl mixture typical in tall oil fatty acid (TOFA), R 11 is benzyl, R 12 and R 13 are each hydrogen, R 14 is hydroxyethyl, and X − is chloride; or the corrosion inhibitor comprises the bis-quaternized imidazoline compound of formula (III), R 1 and R 2 are derived from a mixture of tall oil fatty acids and are predominantly a mixture of C 17 H 33 and C 17 H 31 , x is 2, y is 1, R 3 and R 4 are —C 2 H 2 —, and L 1 and L 2 are —CO 2 H, —SO 3 H, or —PO 3 H 2 ; or the corrosion inhibitor comprises the bis-quaternized imidazoline compound of formula (III), R 1 and R 2 independently C 16 -C 18 alkyl; R 4 is —C 2 H 2 —; x is 2; y is 1; n is 0; L 1 is —COOH, —SO 3 H, or —PO 3 H 2 and L 2 is absent or H; or the corrosion inhibitor comprises the quaternary ammonium compound and the bis-quaternized imidazoline compound of Formula (III).

10 .- 11 . (canceled)

12 . The composition of claim 1 , wherein the corrosion inhibitor comprises a pyridinium compound of Formula (V):

wherein
R 9 is an alkyl group, an aryl group, or an arylalkyl group, wherein said alkyl groups have from 1 to about 18 carbon atoms; and
X − is a halide.

13 . The composition of claim 12 , wherein the corrosion inhibitor comprises the pyridinium compound of Formula (V), R 9 is benzyl, and X − is chloride.

14 . (canceled)

15 . The composition of claim 1 , wherein the quaternary ammonium compound comprises either:
the quaternary ammonium salt, and the quaternary ammonium salt comprises a tetramethyl ammonium salt, a tetraethyl ammonium salt, a tetrapropyl ammonium salt, a tetrabutyl ammonium salt, a tetrahexyl ammonium salt, a tetraoctyl ammonium salt, a benzyltrimethyl ammonium salt, a benzyltriethyl ammonium salt, a phenyltrimethyl ammonium salt, a phenyltriethyl ammonium salt, a cetyl benzyldimethyl ammonium salt, a hexadecyl trimethyl ammonium salt, a dimethyl alkyl benzyl quaternary ammonium salt, a monomethyl dialkyl benzyl quaternary ammonium salt, a trimethyl benzyl quaternary ammonium salt, or a trialkyl benzyl quaternary ammonium salt, wherein the alkyl group has about 6 to about 24 carbon atoms; or a quaternary ammonium compound of F

Assignees

• Ecolab Usa Inc

Inventors

• Bennett Brian Michael
• Solomon Kim R
• Silvernail Carter

Classifications

• C09K8/54 Primary

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• C23G1/088

  solutions containing organic acids · CPC title

• C23F11/161

  Mercaptans · CPC title

• C09K8/524

  organic depositions, e.g. paraffins or asphaltenes · CPC title

• C09K8/532

  Sulfur · CPC title