1. Field of the Invention
Embodiments of the present invention relate to coating composition for improving oil production, which is adapted to coat solid materials, particles, substrates and/or surfaces of producing formations and methods for making and using same.
More particularly, embodiments of the present invention relates to compositions for improving oil production, where the compositions include an amine component, an aminephosphate ester component and optionally a solvent component, the compositions are adapted to coat solid materials, substrates and/or surfaces of producing formations and methods for making and using same, where the coating agents modify surface properties of the solid materials, substrates and/or surfaces of producing formations to increase oil flow through producing formations, to decrease oil layers adhered to surfaces of the producing formation and to decrease a capillary pressure on the formation.
2. Description of the Related Art
Historically, the use of different chemical systems has been proposed to increase oil production. Some successful applications are injection of polymers, which can either reduce the viscosity of the production fluids (crude oil) or increase the viscosity of water. Injection of water or aqueous solutions with increased viscosity has also been used to force the crude out of the stratum.
Tensioactive systems, such as surfactants, have been injected to lower the capillary pressure that impedes oil droplets from moving through the formation or reservoir. This approach has been followed by many service companies in squeeze jobs or in enhanced oil recovery operations.
While there are known methods and compositions for increasing oil production from oil producing formations, there is still a need in the art for new methods and compositions that can be employed to increase oil production and/or decrease a resistance to oil droplets traversing the formation.
Compositions
Embodiments of the present invention provide coating compositions adapted to form a coating on surfaces of a producing reservoir or formation or the surfaces of the producing formation and particles, synthetic or natural, in the producing formation or added to the producing formation through fracturing operations. The coating is adapted to modify surface properties or the surfaces and the particles decreasing oil residual saturation through producing reservoir or formation, where the coatings include an amine component, an aminephosphate ester component and optionally a solvent component.
The present invention provides an amine component, an aminephosphate ester component and optionally a solvent component capable to precipitate in reservoir or formation substrate where the coating is deformable and where the substrate is ideally suited for modifying surface properties or the surfaces and the particles in a producing formation to decrease residual oil saturation.
Method for Treating
The present invention provides a method for modifying surface properties of surfaces or the surfaces and particles in producing formations, where the method includes the step of contacting the surfaces or surfaces and particles with a composition under conditions sufficient to form a partial or complete coatings on surfaces or surfaces and particles, where the compositions includes an amine component, an aminephosphate ester component and optionally a solvent component.
Methods for Using the Treating Methods
The present invention provides a method for producing including the step of circulating and/or pumping a fluid into a producing reservoir or formation, where the fluid includes a coating composition of this invention. The coating is adapted to modify surface properties or the surfaces and the particles decreasing oil residual saturation through producing reservoir or formation, where the coatings include an amine component, an aminephosphate ester component and optionally a solvent component.
The invention can be better understood with reference to the following detailed description together with the appended illustrative drawings in which like elements are numbered the same:
The inventors have found that a composition can be produced that, when added to a particulate metal-oxide-containing solid or other solid materials or to a suspension or dispersion including a particulate metal-oxide-containing solid or other solid materials, the particles are modified so that an aggregation propensity, aggregation potential and/or a zeta potential of the particles are altered. The inventors have also found that metal-oxide-containing solid particles or other solid particles can be prepared having modified surfaces or portions thereof, where the modified particles have improved aggregation tendencies and/or propensities and/or alter particle zeta potentials. The inventors have also found that the compositions and/or the modified metal-oxide-containing solid or other solid particles can be used in oil field applications including drilling, fracturing, producing, injecting, sand control, or any other downhold application. The inventors have also found that the modified particulate metal-oxide-containing solid particles or particles of any other solid material can be used any other application where increased particle aggregation potentials are desirable or where decreased absolute values of the zeta potential of the particles, which is a measure of aggregation propensity. The inventors have also found that a coated particulate metal-oxide-containing solid compositions can be formed, where the coating is deformable and the coated particles tend to self-aggregate and tend to cling to surfaces having similar coatings or having similar chemical and/or physical properties to that of the coating. That is to say, that the coated particles tend to prefer like compositions, which increase their self-aggregation propensity and increase their ability to adhere to surface that have similar chemical and/or physical properties. The inventors have found that the coating compositions of this invention are distinct from known compositions for modifying particle aggregation propensities and that the coated particles are ideally suited as proppants, where the particles have altered zeta potentials that change the charge on the particles causing them to attract and agglomerate. The change in zeta potential or aggregation propensity causes each particle to have an increased frictional drag keeping the proppant in the fracture. The compositions are also ideally suited for decreasing fines migrating into a fracture pack or to decrease the adverse impact of fines migration into a fractured pack.
Compositions
The invention broadly relates to a composition including an amine and a phosphate ester. The composition modifies surfaces of solid materials or portions thereof altering the chemical and/or physical properties of the surfaces. The altered properties permit the surfaces to become self attracting or to permit the surfaces to be attractive to material having similar chemical and/or physical properties. In the case of particles including metal oxide particles such as particles of silica, alumina, titania, magnesia, zirconia, other metal oxides or oxides including a mixture of these metal oxides (natural or synthetic), the composition forms a complete or partial coating on the surfaces of the particles. The coating can interact with the surface by chemical and/or physical interactions including, without limitation, chemical bonds, hydrogen bonds, electrostatic interactions, dipolar interactions, hyperpolarizability interactions, cohesion, adhesion, adherence, mechanical adhesion or any other chemical and/or physical interaction that allows a coating to form on the particles. The coated particles have a greater aggregation or agglomeration propensity than the uncoated particles. Thus, the particles before treatment may be free flowing, while after coating are not free flowing, but tend to clump, aggregate or agglomerate. In cases, where the composition is used to coat surfaces of a geological formation, a synthetic metal oxide structure and/or metal-oxide containing particles, the particles will not only tend to aggregate together, the particles also will tend to cling to the coated formation or structural surfaces.
Treated Structures and Substrates
The present invention also broadly relates to structures and substrates treated with a composition of this invention, where the structures and substrates include surfaces that are partially or completely coated with a composition of this invention. The structures or substrates can be ceramic or metallic or fibrous. The structures or substrates can be spun such as a glass wool or steel wool or can be honeycombed like catalytic converters or the like that include channels that force fluid to flow through tortured paths so that particles in the fluid are forced in contact with the substrate or structured surfaces. Such structures or substrates are ideally suited as particulate filters or sand control media.
Methods for Treating Particulate Solids
The present invention broadly relates to a method for treating metal oxide-containing surfaces including the step of contacting the metal oxide-containing surface with a composition of this invention. The composition forms a coating on the surface altering the properties of the surface so that the surface is now capable to interacting with similarly treated surfaces to form agglomerated and/or aggregated structures. The treating can be designed to coat continuous metal oxide containing surfaces and/or the surfaces of metal oxide containing particles. If both are treated, then the particles cannot only self-aggregate, but the particles can also aggregate, agglomerate and/or cling to the coated continuous surfaces. The compositions can be used in fracturing fluids, in drilling fluids, in completion fluids, in sand control applications or any other downhole application. Additionally, the coated particles can be used in fracturing fluids. Moreover, structures, screens or filters coated with the compositions of this invention can be used to attract and remove fines that have been modified with the compositions of this invention.
Method for Fracturing and/or Propping
The present invention broadly relates to methods for fracturing a formation including the step of pumping a fracturing fluid including a composition of this invention into a producing formation at a pressure sufficient to fracture the formation. The composition modifies an aggregation potential and/or zeta-potential of formation particles and formation surfaces during fracturing so that the formation particles aggregate and/or cling to the formation surfaces or each other increasing fracturing efficiency and increasing productivity of the fracture formation. The composition of this invention can also be used in a pre-pad step to modify the surfaces of the formation so that during fracturing the formation surfaces are pre-coated. The prepad step involves pumping a fluid into the formation ahead of the treatment to initiate the fracture and to expose the formation face with fluids designed to protect the formation. Beside just using the composition as part of the fracturing fluid, the fracturing fluid can also include particles that have been prior treated with the composition of this invention, where the treated particles act as proppants to prop open the formation after fracturing. If the fracturing fluid also includes the composition, then the coated particle proppant will adhere to formation surfaces to a greater degree than would uncoated particle proppant.
In an alternate embodiment of this invention, the fracturing fluid includes particles coated with a composition of this invention as proppant. In this embodiment, the particles have a greater self-aggregation propensity and will tend to aggregate in locations that may most need to be propped open. In all fracturing applications including proppants coated with or that become coated with the composition of this invention during fracturing, the coated proppants are likely to have improved formation penetration and adherence properties. These greater penetration and adherence or adhesion properties are due not only to a difference in the surface chemistry of the particles relative to the surface chemistry of un-treated particles, but also due to a deformability of the coating itself. Thus, the inventors believe that as the particles are being forced into the formation, the coating will deform to allow the particles to penetrate into a position and as the pressure is removed the particles will tend to remain in place due to the coating interaction with the surface and due to the relaxation of the deformed coating. In addition, the inventors believe that the altered aggregation propensity of the particles will increase proppant particle density in regions of the formation most susceptible to proppant penetration resulting in an enhance degree of formation propping. For additional information on fracturing fluid components that may be used with the fracturing fluids of this invention the reader is referred to U.S. Pat. Nos. 7,140,433, 7,517,447, 7,268,100, 7,392,847, 7,350,579, 7,712,535, and 7,565,933; and United States Published Applications Nos. 20070032693, 20050137114, 20090250659, 20050250666, 20080039345, 20060194700, 20070173414, 20070129257, 20080257553, 20090203553, 20070173413, 20080318812, 20080287325, 20080314124, 20080269082, 20080197085, 20080257554, 20080251252, 20090151959, 20090200033, 20090200027, 20100000795, 20100012901, 20090067931, 20080283242, 20100077938, 20100122815, and 20090275488. These applications and patents are incorporated by reference through the operation of the last paragraph of the specification.
Method for Producing
The present invention also broadly relates to a method for producing including the step of circulating and/or pumping a fluid into, where the fluid includes a composition of this invention, which increases an aggregation potential or decreases an absolute value of the zeta potential of any particulate solid including a metal oxide-containing solid in the fluid or that becomes entrained in the fluid to increase solids removal and to decrease the potential of the particles plugging the formation and/or production tubing.
New Disclosure
The inventors have found that compositions and methods using that compositions can be implemented, where the compositions modify a Zeta Potential by coating of metal oxide surfaces of a reservoir or formation to increase oil recovery in oil producing reservoir or formations. The coating is adapted to modify surface properties or the surfaces and the particles decreasing oil residual saturation through producing reservoir or formation.
The inventors have found that chemical compositions originally designed and used as aggregating agents can be applied to meal oxides surfaces, especially metal oxide surfaces in oil-bearing formations, to increase oil production during squeeze job operations of producing wells or in injection wells to increase oil production by decreasing a residual oil saturation by means of decreasing a capillary pressure on the formation. The coating compositions of this invention include an amine component, an aminephosphate ester component and optionally a solvent component, where the aminephosphate ester component is generally a reaction product of an amine or mixture of amines and a phosphate reagent or mixture of phosphate reagents. The phosphate reagents may be phosphoric acid, polyphosphoric acid, phosphate esters or any other phosphate containing compound that will react with an amine.
Basically, the difference of the present approach to the use of surfactants and polymers is that the present compositions coat metal oxide surfaces of oil producing reservoirs and formations decreasing the capillary pressure at low oil saturation permitting increased production fluids out of the producing formations increasing oil production and/or recovery from the reservoir or formation. In certain embodiments, the coating are long lasting. In other embodiments, the coatings are substantially permanent changing the wettability more towards water wetting. In other embodiments, the coatings are permanent. In certain embodiments, the compositions include alkyl pyridinium phosphate esters including an alkyl amine components, an aminephosphate ester reaction product and optionally a solvent.
The inventors have also found that the chemical systems of this invention may also include aggregating agents for controlling proppant flow back and fine movement during squeeze jobs and in enhanced oil recovery (EOR) operations, while the coating agents increase production fluid production. The product is applied as a pump in fluid to consolidate the formation sand and prevent proppant flowback. The invention is to use aminephosphate ester reaction product chemistry for a new application in sand control and EOR operations.
Suitable Agents
Suitable amines for the amine component include, without limitation, an amine of the general formula R1,R2NH or mixtures or combinations thereof, where R1 and R2 are independently a hydrogen atom or a carbyl group having between about between about 1 and 40 carbon atoms and the required hydrogen atoms to satisfy the valence, where at least R1 or R2 is a nitrogen containing heterocycle, and where one or more of the carbon atoms can be replaced by one or more hetero atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur or mixture or combinations thereof and where one or more of the hydrogen atoms can be replaced by one or more single valence atoms selected from the group consisting of fluorine, chlorine, bromine, iodine or mixtures or combinations thereof. Exemplary examples of amines suitable for use in this invention include, without limitation, pyridines and alkyl pyridines or mixtures of alkyl pyridines, pyrrole and alkyl pyrroles or mixtures of alkyl pyrroles, piperidine and alkyl piperidines or mixtures of alkyl piperidines, pyrrolidine and alkyl pyrrolidines or mixtures of alkyl pyrrolidines, indole and alkyl indoles or mixture of alkyl indoles, imidazole and alkyl imidazole or mixtures of alkyl imidazole, quinoline and alkyl quinoline or mixture of alkyl quinoline, isoquinoline and alkyl isoquinoline or mixture of alkyl isoquinoline, pyrazine and alkyl pyrazine or mixture of alkyl pyrazine, quinoxaline and alkyl quinoxaline or mixture of alkyl quinoxaline, acridine and alkyl acridine or mixture of alkyl acridine, pyrimidine and alkyl pyrimidine or mixture of alkyl pyrimidine, quinazoline and alkyl quinazoline or mixture of alkyl quinazoline, or mixtures or combinations thereof. In certain embodiments, the amines of the amine components comprise alkyl pyridines.
Suitable amines for preparing the amine-phosphate ester reaction products include, without limitation, any amine that is capable of reacting with a suitable phosphate ester to form a composition that forms a deformable coating on a metal-oxide-containing surface. Exemplary examples of such amines include, without limitation, any amine of the general formula R1,R2NH or mixtures or combinations thereof, where R1 and R2 are independently a hydrogen atom or a carbyl group having between about between about 1 and 40 carbon atoms and the required hydrogen atoms to satisfy the valence and where one or more of the carbon atoms can be replaced by one or more hetero atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur or mixture or combinations thereof and where one or more of the hydrogen atoms can be replaced by one or more single valence atoms selected from the group consisting of fluorine, chlorine, bromine, iodine or mixtures or combinations thereof. Exemplary examples of amines suitable for use in this invention include, without limitation, aniline and alkyl anilines or mixtures of alkyl anilines, pyridines and alkyl pyridines or mixtures of alkyl pyridines, pyrrole and alkyl pyrroles or mixtures of alkyl pyrroles, piperidine and alkyl piperidines or mixtures of alkyl piperidines, pyrrolidine and alkyl pyrrolidines or mixtures of alkyl pyrrolidines, indole and alkyl indoles or mixture of alkyl indoles, imidazole and alkyl imidazole or mixtures of alkyl imidazole, quinoline and alkyl quinoline or mixture of alkyl quinoline, isoquinoline and alkyl isoquinoline or mixture of alkyl isoquinoline, pyrazine and alkyl pyrazine or mixture of alkyl pyrazine, quinoxaline and alkyl quinoxaline or mixture of alkyl quinoxaline, acridine and alkyl acridine or mixture of alkyl acridine, pyrimidine and alkyl pyrimidine or mixture of alkyl pyrimidine, quinazoline and alkyl quinazoline or mixture of alkyl quinazoline, or mixtures or combinations thereof.
Suitable phosphate esters for preparing the amine-phosphate ester reaction products include, without limitation, any phosphate ester that is capable of reacting with a suitable amine to form a composition that forms a deformable coating on a metal-oxide containing surface or partially or completely coats particulate materials. Exemplary examples of such phosphate esters include, without limitation, any phosphate esters of the general formula P(O)(OR3)(OR4)(OR5) or mixture or combinations thereof, where R3, R4, and OR5 are independently a hydrogen atom or a carbyl group having between about between about 1 and 40 carbon atoms and the required hydrogen atoms to satisfy the valence and where one or more of the carbon atoms can be replaced by one or more hetero atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur or mixture or combinations thereof and where one or more of the hydrogen atoms can be replaced by one or more single valence atoms selected from the group consisting of fluorine, chlorine, bromine, iodine or mixtures or combinations thereof. Exemplary examples of phosphate esters include, without limitation, phosphate ester of alkanols having the general formula P(O)(OH)x(OR6)y where x+y=3 and are independently a hydrogen atom or a carbyl group having between about between about 1 and 40 carbon atoms and the required hydrogen atoms to satisfy the valence and where one or more of the carbon atoms can be replaced by one or more hetero atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur or mixture or combinations thereof and where one or more of the hydrogen atoms can be replaced by one or more single valence atoms selected from the group consisting of fluorine, chlorine, bromine, iodine or mixtures or combinations thereof such as ethoxy phosphate, propoxyl phosphate or higher alkoxy phosphates or mixtures or combinations thereof. Other exemplary examples of phosphate esters include, without limitation, phosphate esters of alkanol amines having the general formula N[R7OP(O)(OH)2]3 where R7 is a carbenyl group having between about between about 1 and 40 carbon atoms and the required hydrogen atoms to satisfy the valence and where one or more of the carbon atoms can be replaced by one or more hetero atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur or mixture or combinations thereof and where one or more of the hydrogen atoms can be replaced by one or more single valence atoms selected from the group consisting of fluorine, chlorine, bromine, iodine or mixtures or combinations thereof group including the tri-phosphate ester of tri-ethanol amine or mixtures or combinations thereof. Other exemplary examples of phosphate esters include, without limitation, phosphate esters of hydroxylated aromatics such as phosphate esters of alkylated phenols such as Nonylphenyl phosphate ester or phenolic phosphate esters. Other exemplary examples of phosphate esters include, without limitation, phosphate esters of diols and polyols such as phosphate esters of ethylene glycol, propylene glycol, or higher glycolic structures. Other exemplary phosphate esters include any phosphate ester than can react with an amine and coated on to a substrate forms a deformable coating enhancing the aggregating potential of the substrate. Other exemplary phosphate esters are reaction products of polyphosphoric acid and amines. Other exemplary phosphate esters are reaction products of polyphosphoric acid and alkanolamines.
This example illustrates procedure used in the preparation of the Zeta Potential altering system, a flow enhancing coating compositions of this invention.
59.0% w/w A1010, Alkolidine 11 a mix of alkyl pyridine from Lonza, was added to 32.7% w/w Methanol and mixed for 15 minutes. To this mixture was added 8.00% w/w of A2290, a phosphate ester prepared from reacting 78.50% w/w polyphosphoric acid and 21.50% w/w tri-ethanolamine. The mixture was stirred for 30 minutes.
This example illustrates procedure used in the preparation a zeta modifying composition of this invention.
23% w/w PAP-220, a mix of alkyl pyridines from Vertelus is added to a mixture of 23% w/w ethylene glycol and 23% w/w methanol and stirred for 15 minutes. To this mixture was added 23% HAP-310, a mixture of alkyl pyridines with less than 5% of lutidine (di-methyl pryridines) and stirred for 15 minutes. To this mixtures was added 8.00% w/w A2240, a phosphate ester by reacting 53.91% w/w polyphosphoric acid, 31.91% w/w tri-ethanolamine in 14.18% w/w water and stirred for 30 minutes.
A 2% KCl brine was prepared having a 0 wt. % concentration of the coating composition of Example 1 designated S0.
A 2% KCl brine was prepared having a 1 wt. % concentration of the coating composition of Example 1 designated S1.
A 2% KCl brine was prepared having a 10 wt. % concentration of the coating composition of Example 1 designated S2.
Berea sandstone samples were treated with compositions S0, S1 and S2. The sandstone sample were then tested for modification of properties. Table 1 and Table 2 tabulates the results of the testing and
aW represents the USBM (U.S. Bureau of Mines) wettability Index defined as W = log A1/A2, USBM (U.S. Bureau of Mines) method. This is a macroscopic mean wettability of a rock to given fluids. It has no validity as an absolute measurement, but is industry standard for comparing the wettability of various core plugs.
bS0 - 0% coating composition of Example 2,
cS1 - 1% coating composition of Example 2,
d2 - 10% coating composition of Example 2
Referring now to
All references cited herein are incorporated by reference. Although the invention has been disclosed with reference to its preferred embodiments, from reading this description those of skill in the art may appreciate changes and modification that may be made which do not depart from the scope and spirit of the invention as described above and claimed hereafter.
This application is a divisional application of U.S. patent application Ser. No. 12/832,222, filed 8 Jul. 2010 (Jul. 8, 2010), now U.S. Pat. No. 8,871,694 issued Oct. 28, 2014, which is continuation-in-part of U.S. patent application Ser. No. 12/151,429, filed May 6, 2008, now U.S. Pat. No. 7,956,017 issued 7 Jun. 2011 (Jun. 7, 2011), which is a divisional application of U.S. patent application Ser. No. 11/298,547, filed Dec. 9, 2005, now U.S. Pat. No. 7,392,847, issued Jul. 1, 2008 and/or of U.S. patent application Ser. No. 12/075,461, filed Mar. 11, 2008, now U.S. Pat. No. 7,829,510 issued 9 Nov. 2010 (Nov. 9, 2010), which is a divisional application Ser. No. 11/298,556, filed Dec. 9, 2005, now U.S. Pat. No. 7,350,579, issued Apr. 1, 2008. These patents and applications are incorporated by reference through the operation of the last paragraph of the specification.
Number | Name | Date | Kind |
---|---|---|---|
2196042 | Timpson | Apr 1940 | A |
2262428 | Lietz | Nov 1941 | A |
2390153 | Kern | Dec 1945 | A |
2805958 | Bueche et al. | Jul 1959 | A |
3059909 | Wise | Oct 1962 | A |
3163219 | Wyant et al. | Dec 1964 | A |
3301723 | Chrisp | Jan 1967 | A |
3301848 | Halleck | Jan 1967 | A |
3303896 | Tillotson et al. | Feb 1967 | A |
3317430 | Priestley et al. | May 1967 | A |
3335794 | Bond | Aug 1967 | A |
3414054 | Bernard | Dec 1968 | A |
3477956 | Stanford et al. | Nov 1969 | A |
3565176 | Wittenwyler | Feb 1971 | A |
3584687 | Stanford et al. | Jun 1971 | A |
3856921 | Shrier et al. | Dec 1974 | A |
3888312 | Tiner et al. | Jun 1975 | A |
3933205 | Kiel | Jan 1976 | A |
3937283 | Blauer et al. | Feb 1976 | A |
3960736 | Free et al. | Jun 1976 | A |
3965982 | Medlin | Jun 1976 | A |
3990978 | Hill | Nov 1976 | A |
4007792 | Meister | Feb 1977 | A |
4052159 | Fuerst et al. | Oct 1977 | A |
4066398 | Hwa | Jan 1978 | A |
4067389 | Savins | Jan 1978 | A |
4101441 | Hwa et al. | Jul 1978 | A |
4108782 | Thompon | Aug 1978 | A |
4112050 | Sartori et al. | Sep 1978 | A |
4112051 | Sartori et al. | Sep 1978 | A |
4112052 | Sartori et al. | Sep 1978 | A |
4113631 | Thompson | Sep 1978 | A |
4123234 | Vossos | Oct 1978 | A |
4378845 | Medlin et al. | Apr 1983 | A |
4385935 | Skjeldal | May 1983 | A |
4444262 | Haskin et al. | Apr 1984 | A |
4461716 | Barbarin et al. | Jul 1984 | A |
4479041 | Fenwick et al. | Oct 1984 | A |
4506734 | Nolte | Mar 1985 | A |
4514309 | Wadhwa | Apr 1985 | A |
4541935 | Constien et al. | Sep 1985 | A |
4549608 | Stowe et al. | Oct 1985 | A |
4554090 | Jones | Nov 1985 | A |
4561985 | Glass, Jr. | Dec 1985 | A |
4623021 | Stowe | Nov 1986 | A |
4654266 | Kachnik | Mar 1987 | A |
4657081 | Hodge | Apr 1987 | A |
4660643 | Perkins | Apr 1987 | A |
4683068 | Kucera | Jul 1987 | A |
4686052 | Baranet et al. | Aug 1987 | A |
4695389 | Kubala | Sep 1987 | A |
4705113 | Perkins | Nov 1987 | A |
4714115 | Uhri | Dec 1987 | A |
4718490 | Uhri | Jan 1988 | A |
4724905 | Uhri | Feb 1988 | A |
4725372 | Teot et al. | Feb 1988 | A |
4739834 | Peiffer et al. | Apr 1988 | A |
4741401 | Wailes et al. | May 1988 | A |
4748011 | Baize | May 1988 | A |
4779680 | Sydansk | Oct 1988 | A |
4795574 | Syrinek et al. | Jan 1989 | A |
4817717 | Jennings, Jr. et al. | Apr 1989 | A |
4830106 | Uhri | May 1989 | A |
4846277 | Khalil et al. | Jul 1989 | A |
4848468 | Hazlett et al. | Jul 1989 | A |
4852650 | Jennings, Jr. et al. | Aug 1989 | A |
4869322 | Vogt, Jr. et al. | Sep 1989 | A |
4892147 | Jennings, Jr. et al. | Jan 1990 | A |
4926940 | Stromswold | May 1990 | A |
4938286 | Jennings, Jr. | Jul 1990 | A |
4978512 | Dillon | Dec 1990 | A |
5005645 | Jennings, Jr. et al. | Apr 1991 | A |
5024276 | Borchardt | Jun 1991 | A |
5067556 | Fudono et al. | Nov 1991 | A |
5074359 | Schmidt | Dec 1991 | A |
5074991 | Weers | Dec 1991 | A |
5082579 | Dawson | Jan 1992 | A |
5106518 | Cooney et al. | Apr 1992 | A |
5110486 | Manalastas et al. | May 1992 | A |
5169411 | Weers | Dec 1992 | A |
5224546 | Smith et al. | Jul 1993 | A |
5228510 | Jennings, Jr. et al. | Jul 1993 | A |
5246073 | Sandiford et al. | Sep 1993 | A |
5259455 | Nimerick et al. | Nov 1993 | A |
5330005 | Card et al. | Jul 1994 | A |
5342530 | Aften et al. | Aug 1994 | A |
5347004 | Rivers et al. | Sep 1994 | A |
5363919 | Jennings, Jr. | Nov 1994 | A |
5465792 | Dawson et al. | Jan 1995 | A |
5402846 | Jennings, Jr. et al. | Apr 1995 | A |
5411091 | Jennings, Jr. | May 1995 | A |
5424284 | Patel et al. | Jun 1995 | A |
5439055 | Card et al. | Aug 1995 | A |
5462721 | Pounds et al. | Oct 1995 | A |
5472049 | Chaffe et al. | Dec 1995 | A |
5482116 | El-Rabaa et al. | Jan 1996 | A |
5488083 | Kinsey, III et al. | Jan 1996 | A |
5497831 | Hainey et al. | Mar 1996 | A |
5501275 | Card et al. | Mar 1996 | A |
5539044 | Dindi et al. | Jul 1996 | A |
5551516 | Norman et al. | Sep 1996 | A |
5624886 | Dawson et al. | Apr 1997 | A |
5635458 | Lee et al. | Jun 1997 | A |
5649596 | Jones et al. | Jul 1997 | A |
5669447 | Walker et al. | Sep 1997 | A |
5674377 | Sullivan, III et al. | Oct 1997 | A |
5688478 | Pounds et al. | Nov 1997 | A |
5693837 | Smith et al. | Dec 1997 | A |
5711396 | Joerg et al. | Jan 1998 | A |
5722490 | Ebinger | Mar 1998 | A |
5744024 | Sullivan, III et al. | Apr 1998 | A |
5755286 | Ebinger | May 1998 | A |
5775425 | Weaver et al. | Jul 1998 | A |
5787986 | Weaver et al. | Aug 1998 | A |
5806597 | Tjon-Joe-Pin et al. | Sep 1998 | A |
5807812 | Smith et al. | Sep 1998 | A |
5833000 | Weaver et al. | Nov 1998 | A |
5853048 | Weaver et al. | Dec 1998 | A |
5871049 | Weaver et al. | Feb 1999 | A |
5877127 | Card et al. | Mar 1999 | A |
5908073 | Nguyen et al. | Jun 1999 | A |
5908814 | Patel et al. | Jun 1999 | A |
5964295 | Brown et al. | Oct 1999 | A |
5979557 | Card et al. | Nov 1999 | A |
5980845 | Cherry | Nov 1999 | A |
6001887 | Keup et al. | Dec 1999 | A |
6016871 | Burts, Jr. | Jan 2000 | A |
6035936 | Whalen | Mar 2000 | A |
6040360 | Menovcik | Mar 2000 | A |
6047772 | Weaver et al. | Apr 2000 | A |
6054417 | Graham et al. | Apr 2000 | A |
6059034 | Rickards et al. | May 2000 | A |
6060436 | Synder et al. | May 2000 | A |
6063972 | Duncum et al. | May 2000 | A |
6069118 | Hinkel et al. | May 2000 | A |
6123394 | Jeffrey | Sep 2000 | A |
6133205 | Jones | Oct 2000 | A |
6147034 | Jones et al. | Nov 2000 | A |
6162449 | Maier et al. | Dec 2000 | A |
6162766 | Muir et al. | Dec 2000 | A |
6169058 | Le et al. | Jan 2001 | B1 |
6228812 | Dawson et al. | May 2001 | B1 |
6247543 | Patel et al. | Jun 2001 | B1 |
6267938 | Warrender et al. | Jul 2001 | B1 |
6283212 | Hinkel | Sep 2001 | B1 |
6291405 | Lee et al. | Sep 2001 | B1 |
6330916 | Rickards et al. | Dec 2001 | B1 |
6725931 | Nguyen et al. | Apr 2004 | B2 |
6756345 | Pakulski et al. | Jun 2004 | B2 |
6793018 | Dawson et al. | Sep 2004 | B2 |
6832650 | Nguyen et al. | Dec 2004 | B2 |
6875728 | Gupta et al. | Apr 2005 | B2 |
7268100 | Kippie et al. | Sep 2007 | B2 |
7350579 | Gatlin et al. | Apr 2008 | B2 |
7392847 | Gatlin et al. | Jul 2008 | B2 |
7517447 | Gatlin | Apr 2009 | B2 |
7565933 | Kippie et al. | Jul 2009 | B2 |
7566686 | Kippie et al. | Jul 2009 | B2 |
7712535 | Venditto et al. | May 2010 | B2 |
7767628 | Kippie et al. | Aug 2010 | B2 |
7829510 | Gatlin et al. | Nov 2010 | B2 |
7886824 | Kakadjian et al. | Feb 2011 | B2 |
7915203 | Falana et al. | Mar 2011 | B2 |
7932214 | Zamora et al. | Apr 2011 | B2 |
7942201 | Ekstrand et al. | May 2011 | B2 |
7956017 | Gatlin et al. | Jun 2011 | B2 |
7956217 | Falana et al. | Jun 2011 | B2 |
7971659 | Gatlin et al. | Jul 2011 | B2 |
7989404 | Kakadjian et al. | Aug 2011 | B2 |
7992653 | Zamora et al. | Aug 2011 | B2 |
8011431 | van Petegem et al. | Sep 2011 | B2 |
8028755 | Darnell et al. | Oct 2011 | B2 |
8034750 | Thompson et al. | Oct 2011 | B2 |
8084401 | Lukocs et al. | Dec 2011 | B2 |
8093431 | Falana et al. | Jan 2012 | B2 |
8097567 | Wilson, Jr. | Jan 2012 | B2 |
8141661 | Kakadjian et al. | Mar 2012 | B2 |
8158562 | Wilson, Jr. et al. | Apr 2012 | B2 |
8172952 | Wanner et al. | May 2012 | B2 |
8220546 | Kakadjian et al. | Jul 2012 | B2 |
8258339 | Falana et al. | Sep 2012 | B2 |
8273693 | Schwartz | Sep 2012 | B2 |
8287640 | Zamora et al. | Oct 2012 | B2 |
8362298 | Falana et al. | Jan 2013 | B2 |
8466094 | Kakadjian et al. | Jun 2013 | B2 |
8475585 | Zamora et al. | Jul 2013 | B2 |
8507412 | Lukocs et al. | Aug 2013 | B2 |
8507413 | Wilson, Jr. | Aug 2013 | B2 |
8524639 | Falana et al. | Sep 2013 | B2 |
8530394 | Gatlin | Sep 2013 | B2 |
8563481 | Gatlin et al. | Oct 2013 | B2 |
8714283 | Gatlin et al. | May 2014 | B2 |
8728989 | Kakadjian et al. | May 2014 | B2 |
8772203 | Schwartz | Jul 2014 | B2 |
8835364 | Thompson et al. | Sep 2014 | B2 |
8841240 | Kakadjian et al. | Sep 2014 | B2 |
8846585 | Falana et al. | Sep 2014 | B2 |
8851174 | Zamora et al. | Oct 2014 | B2 |
8871694 | Kakadjian et al. | Oct 2014 | B2 |
8899328 | Zamora et al. | Dec 2014 | B2 |
8932996 | Falana et al. | Jan 2015 | B2 |
8944164 | Veldman et al. | Feb 2015 | B2 |
8946130 | Zamora et al. | Feb 2015 | B2 |
8950493 | van Petegem et al. | Feb 2015 | B2 |
20020049256 | Bergeron, Jr. | Apr 2002 | A1 |
20020165308 | Kinniard et al. | Nov 2002 | A1 |
20030220204 | Baran, Jr. et al. | Nov 2003 | A1 |
20050045330 | Nguyen et al. | Mar 2005 | A1 |
20050092489 | Welton et al. | May 2005 | A1 |
20100252262 | Ekstrand et al. | Oct 2010 | A1 |
20100305010 | Falana et al. | Dec 2010 | A1 |
20100311620 | Kakadjian et al. | Dec 2010 | A1 |
20110001083 | Falana et al. | Jan 2011 | A1 |
20110177982 | Ekstrand et al. | Jul 2011 | A1 |
20110240131 | Parker | Oct 2011 | A1 |
20120071367 | Falana et al. | Mar 2012 | A1 |
20120073813 | Zamora et al. | Mar 2012 | A1 |
20120097893 | Wanner et al. | Apr 2012 | A1 |
20120273206 | Falana et al. | Nov 2012 | A1 |
20120279727 | Kakadjian et al. | Nov 2012 | A1 |
20120295820 | Falana et al. | Nov 2012 | A1 |
20120302468 | Falana et al. | Nov 2012 | A1 |
20120325329 | Schwartz | Dec 2012 | A1 |
20130081820 | Falana et al. | Apr 2013 | A1 |
20130096038 | Kim et al. | Apr 2013 | A1 |
20130175477 | Falana et al. | Jul 2013 | A1 |
20130270012 | Kakadjian et al. | Oct 2013 | A1 |
20130274151 | Kakadjian et al. | Oct 2013 | A1 |
20130312977 | Lembcke et al. | Nov 2013 | A1 |
20130331301 | Falana et al. | Dec 2013 | A1 |
20140087977 | Kim et al. | Mar 2014 | A1 |
20140128294 | Gatlin et al. | May 2014 | A1 |
20140128308 | Levey et al. | May 2014 | A1 |
20140166285 | Santra et al. | Jun 2014 | A1 |
20140262287 | Treybig et al. | Sep 2014 | A1 |
20140262319 | Treybig et al. | Sep 2014 | A1 |
20140303048 | Kakadjian et al. | Oct 2014 | A1 |
20140315763 | Kakadjian et al. | Oct 2014 | A1 |
20140318793 | van Petergem et al. | Oct 2014 | A1 |
20140318795 | Thompson, Sr. et al. | Oct 2014 | A1 |
20140323360 | Comarin et al. | Oct 2014 | A1 |
20140323362 | Falana et al. | Oct 2014 | A1 |
20150007989 | Tan et al. | Jan 2015 | A1 |
20150011440 | Zamora et al. | Jan 2015 | A1 |
20150051311 | Zamora et al. | Feb 2015 | A1 |
20150068747 | Hwang et al. | Mar 2015 | A1 |
20150072901 | Samuel et al. | Mar 2015 | A1 |
20150087561 | Falana et al. | Mar 2015 | A1 |
20150087562 | Falana et al. | Mar 2015 | A1 |
Number | Date | Country |
---|---|---|
2125513 | Jan 1995 | CA |
2437522 | Feb 2005 | CA |
4027300 | May 1992 | DE |
775376 | Oct 1954 | GB |
1073338 | Jun 1967 | GB |
10001461 | Jun 1988 | JP |
08151422 | Nov 1996 | JP |
10110115 | Apr 1998 | JP |
2005194148 | Jul 2005 | JP |
WO 9856497 | Dec 1998 | WO |
WO 2009141308 | Nov 2009 | WO |
Entry |
---|
Abdel-Moghny et al, “Inhibition of Scales Deposited in Oil Well,” Materials Science Research India, 1, 35-44 (s003). |
Extended Search Report. |
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20140303048 A1 | Oct 2014 | US |
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