The present invention discloses methods for inhibiting scale formation or precipitate formation in oil field flow lines and processing equipment exposed to fluid containing components that form scale or precipitates on surfaces of oil field flow lines and processing equipment, especially in highly p
The present invention discloses methods for inhibiting scale formation or precipitate formation in oil field flow lines and processing equipment exposed to fluid containing components that form scale or precipitates on surfaces of oil field flow lines and processing equipment, especially in highly paraffinic crude oils, where the method and system include applying an electric field across the fluid flowing through a flow line, where the fluid includes a scale or precipitate inhibitor and where the fluid strength and the inhibitor concentration is sufficient to reduce or prevent scale or precipitant formation.
대표청구항▼
1. A method for inhibiting scale and/or inhibiting precipitate deposition comprising: applying an alternating Rf electric field across an aqueous fluid including scale forming components flowing through flow lines, pipes, and/or equipment, where a field strength and frequency of the alternating Rf e
1. A method for inhibiting scale and/or inhibiting precipitate deposition comprising: applying an alternating Rf electric field across an aqueous fluid including scale forming components flowing through flow lines, pipes, and/or equipment, where a field strength and frequency of the alternating Rf electric field is sufficient to nucleate the scale forming components to produce a first distribution of particles of the scale forming components in the fluid, where the first distribution is homogeneous and uniform, andintroducing, before, during or after field application, a scale inhibiting composition to the fluid flowing through the flow lines, pipes, and/or equipment, where the scale inhibiting composition is present in an amount sufficient to produce a second distribution of particles of the scale forming components in the fluid, where the scale inhibiting composition comprises a chelating agent, a crown ether, a mineral acid, a phosphonic acid, a phosphino carboxylate, a sulfonic acid, cinnamaldehyde, or mixtures and combinations thereof, where the second distribution includes a smaller number of larger particles compared to the particles of the first distribution, where the larger particles have reduced or no size uniformity and where the particles in the second distribution have a reduced scale forming propensity or reduced propensity for forming deposits on surfaces of the flow lines, pipes, and/or equipment than the propensities of the scale forming components in the absence of the scale inhibiting composition. 2. The method of claim 1, wherein the amount of the scale inhibiting composition is sufficient to result in a scale inhibiting composition concentration between about 1 ppm and about 500 ppm and wherein the alternating Rf electric field frequency is between about 20 kHz and about 1 MHz. 3. The method of claim 1, wherein the amount of the scale inhibiting composition is sufficient to result in a scale inhibiting composition concentration between about 5 ppm and about 250 ppm and wherein the alternating Rf electric field frequency is between about 50 kHz and about 500 kHz. 4. The method of claim 1, wherein the amount of the scale inhibiting composition is sufficient to result in a scale inhibiting composition concentration between about 5 ppm and about 200 ppm and wherein the alternating Rf electric field frequency is between about 50 kHz and about 200 kHz. 5. The method of claim 1, wherein the amount of the scale inhibiting composition is sufficient to result in a scale inhibiting composition concentration between about 5 ppm and about 150 ppm and wherein the alternating Rf electric field frequency is between about 50 kHz and about 200 kHz. 6. The method of claim 1, wherein the amount of the scale inhibiting composition is sufficient to result in a scale inhibiting composition concentration between about 5 ppm and about 100 ppm and wherein the alternating Rf electric field frequency is between about 50 kHz and about 200 kHz. 7. The method of claim 1, wherein the scale inhibiting composition is selected from the group consisting of formic acid, acetic acid, lactic acid, malic acid, maleic acid, tartaric acid, citric acid, 2-hydroxyethyliminodiacetic acid (HEIDA), nitrilotriacetic acid (NTA), hydroxyethyenediaminetriacetic acid (HEDTA), ethylenediaminetetraacetic acid (EDTA), trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid, monohydrate (CyDTA), 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA), amino-polycarboxylic acid, diethylene triaminopentamethylenephosphonic acid, aminotrimethylene phosphonic acid, 1,10-bis(phosphonomethyl)-1,10-diazo-4,7,13,16-tetraoxacyclooctadecane, 1,10-bis(phosphinico(alpha-methyl))-1,10-diazo-4,7,13,16-tetraoxacyclooctadecane, glyoxylic acid, hexadecyl succimic anhydride, oleic imidazoline, benzyldimethyl hexadecylammonium chloride, cetyl amine, folic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP A), diethylenetriamine penta(methylene phosphonic acid) (DTPMP A), alpha beta poly-aspartate, carboxymethyl succinic acid, polytartaric acid, o-succinyl gluconic acid, o-succinyl saccharic acid, polyamino acids, poly(octanediol-co-citrate) (POCA), 2-phosphonobutane-1,2,4-tricarboxylic acid (PBCA), polyepoxysuccinic acid (PESA), polyacrolein, humic acids, fulvic acids, carboxymethyl inulin, vinylidene diphosponic acid, 2-phosphonabutane-1,2,4-tricarboxylic acid, boric acid, dendimers, and mixtures or combinations. 8. A method for inhibiting scale and/or inhibiting precipitate deposition comprising: applying an alternating Rf electric field across an aqueous fluid including scale forming components flowing through flow lines, pipes, and/or oil field equipment in the presence of an effective amount of a scale inhibiting composition comprising a chelating agent, a crown ether, a mineral acid, a phosphonic acid, a phosphino carboxylate, a sulfonic acid, cinnamaldehyde, or mixtures and combinations thereof, andforming a secondary particle size distribution of nucleated particles of the scale forming components in the fluid via a synergistic effect of applying the alternating Rf electric field across the fluid in the presence of the scale inhibiting composition characterized in that the applied alternating electric field has a field strength and frequency sufficient to nucleate the scale forming components into a primary particle size distribution comprising homogeneous or uniform particles and the scale inhibiting composition is present in an amount sufficient to convert the primary particle size distribution into the secondary particle size distribution comprising a smaller number of larger particles having reduced size uniformity or no size uniformity,where the distribution achieved by the synergistic effect improves scale inhibition and improves fluid flow characteristics as the fluid has fewer nucleated particles and the particles are not homogeneous or uniform in size. 9. The method of claim 8, wherein the amount of the scale inhibiting composition is sufficient to result in a scale inhibiting composition concentration between about 1 ppm and about 500 ppm and wherein the alternating Rf electric field frequency is between about 20 kHz and about 1 MHz, or a scale inhibiting composition concentration between about 5 ppm and about 250 ppm and wherein the alternating Rf electric field frequency is between about 50 kHz and about 500 kHz, or a scale inhibiting composition concentration between about 5 ppm and about 200 ppm and wherein the alternating Rf electric field frequency is between about 50 kHz and about 200 kHz, or a scale inhibiting composition concentration between about 5 ppm and about 150 ppm and wherein the alternating Rf electric field frequency is between about 50 kHz and about 200 kHz, or a scale inhibiting composition concentration between about 5 ppm and about 100 ppm and wherein the alternating Rf electric field frequency is between about 50 kHz and about 200 kHz. 10. The method of claim 8, wherein the scale inhibiting composition is selected from the group consisting of formic acid, acetic acid, lactic acid, malic acid, maleic acid, tartaric acid, citric acid, 2-hydroxyethyliminodiacetic acid (HEIDA), nitrilotriacetic acid (NTA), hydroxyethyenediaminetriacetic acid (HEDTA), ethylenediaminetetraacetic acid (EDTA), trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid, monohydrate (CyDTA), 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA), amino-polycarboxylic acid, diethylene triaminopentamethylenephosphonic acid, aminotrimethylene phosphonic acid, 1,10-bis(phosphonomethyl)-1,10-diazo-4,7,13,16-tetraoxacyclooctadecane, 1,10-bis(phosphinico(alpha-methyl))-1,10-diazo-4,7,13,16-tetraoxacyclooctadecane, glyoxylic acid, cinnamaldehyde, mineral acids, hexadecyl succimic anhydride, oleic imidazoline, benzyldimethyl hexadecylammonium chloride, cetyl amine, folic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP A), diethylenetriamine penta(methylene phosphonic acid) (DTPMP A), alpha beta poly-aspartate, carboxymethyl succinic acid, polytartaric acid, o-succinyl gluconic acid, o-succinyl saccharic acid, polyamino acids, poly(octanediol-co-citrate) (POCA), 2-phosphonobutane-1,2,4-tricarboxylic acid (PBCA), polyepoxysuccinic acid (PESA), polyacrolein, humic acids, fulvic acids, carboxymethyl inulin, vinylidene diphosponic acid, 2-phosphonabutane-1,2,4-tricarboxylic acid, boric acid, dendimers, and mixtures or combinations.
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