The composition for removing oil deposits

 

(57) Abstract:

The invention relates to the field of dissolution of sediments in the oil industry and can be used in the systems of production, transportation and storage of oil for removal of asphalt-resinous deposits. The inventive cleaning wells from deposits resins, paraffins and asphaltenes in the well is pumped solvent particular cheap stock. The proposed composition for treatment of wells, their bottomhole and surface equipment includes distillation residues of ethylbenzene 20-80 wt. % and distillation residues of the distillation of styrene 5-30 wt.%, as well as waste production of oligomers of propylene - fraction C12+ 15-50 wt.%. Effect: the use of these waste products in a proposed ratio allows qualitatively, quickly and cost-effectively dissolve and remove deposits from boreholes, field communications, with surface oil field equipment, as well as to clean the engines and equipment of compressor stations of carbon and coke. table 2.

The invention relates to the oil industry and can be used for dissolving and UD is vain and field communications and also for the removal of soot and coke equipment of compressor stations and engines operating on diesel fuel and other petroleum products.

Currently, removal of deposits in almost all known compounds solvents are used, the majority of aromatic character, for example, kerosene [U.S. Pat. RF N 2080351, MKI C 09 K 3/00, publ. 27.05.97], acibenzolar resin production of ethylbenzene [and.with. The USSR 779377, MKI C 09 K 3/00, publ. 15.11.80] , polyalkylbenzene the same production [and.with. The USSR 1242504, MKI C 09 K 3/00, publ. 07.07.86], butylbenzene fraction [and.with. The USSR 831771, MKI C 09 K 3/00, publ. BI N 47, 1980].

To improve properties and reduce the cost of the compositions to remove and prevent the formation of deposits in the reagents are added to different substances, wastes of production, such as distillation residues productions butyl alcohol [and.with. The USSR 1495354, MKI C 09 K 3/00, publ. 23.07.89], waste production polypropylenglycol [and. C. the USSR 1606517, MKI C 09 K 3/00, publ. 15.11.90], easy, resin pyrolysis [and.with. The USSR 1460066, MKI C 09 K 3/00, publ. 23.02.89.], distillation residues from the pickup of liquid pyrolysis products [U.S. Pat. RF N 2092677, MKI E 21 B 37/06, BI N 25, 1997].

Composition closest to the claimed, is a mixture comprising 10-50 wt.% etilbenzene sm].

The disadvantage of this structure is not sufficiently high solubility in him ARPD, and that Supplement is a valuable scarce petrochemical product.

The objective of the invention is to provide a composition for removing paraffin, high solubility, low pour point, allowing to increase megacity period equipment. To solve this problem is proposed composition for removing paraffin, having the following composition, wt.%:

VAT residue of ethylbenzene (CORE) - 20-80

VAT residue of the distillation of styrene (KORS) - 5-30

C12+-fraction of oligomers of propylene - 15-50

The proposed mix is a new software component composition, and therefore meets the criteria of patentability "novelty"; use of waste products in a certain ratio in the inventive composition allows you to efficiently and quickly remove the deposits that demonstrates compliance with the invention patentability criterion of "inventive step". "Industrial applicability" is confirmed by the examples below.

The proposed mixture composed of waste industrial petrochemical about the components, % mass:

Trimethylbenzene - 3,0-9,0

Tetraethylene - 10,0-15,0

Pentamethylbenzyl - 25,9-40,0

Hexamethylbenzene - 37,0-61,0

The flash point in closed crucible 170oC

Pour point (-47)oC

KORS is a waste from the production of styrene by dehydrogenation of ethylbenzene and represents a mixture of the following composition, wt.%:

Styrene - 5-30

The divinylbenzene and 0.5-50

Low molecular weight polystyrene - Rest

The flash point in closed crucible 61oC

Pour point below (-52)oC

C12-fraction hydrocarbons - waste production of trimers and tetramers of propylene by oligomerization of propylene, which kubovy balance rectification tetramers of propylene (the COURT); includes hydrocarbon, C12and above, mainly propylene pentamers;

density COURT coefficient was 0.796

the kinematic viscosity was 4.42 mm/sec

Initial boiling point 215oC

The temperature of the end of the boil 278oC

The flash point in closed crucible 86oC

Pour point (-55)oC

Resin CORE has a high viscosity. This disadvantage is missing fraction of oligomers and KORS, which is highly mobile fluids. Therefore, the claimed composition with paraffin oil field equipment, and thereby increase the rate of dissolution of paraffin in the mixture.

Data on the solubility of paraffin deposits in the inventive composition are presented in table 1.

Dissolving ability of mixtures of these components, taken in different ratios, determined by the gravimetric method: a sample of commercial deposits of deposits placed in the test solution of a specific composition. Within days the mixture was incubated in static conditions, then the liquid part of the merge, and nerastvorim part of ASPO weighed.

The pour point of the mixtures of the components, taken in different ratios, define the standard method according to GOST 1533-42.

Example 1. A mixture of 780 g of resin CORE, 50 g of resin KORS and 170 g bottoms distillation of propylene oligomers placed in a flask with a capacity of 1.5 litres; then the flask with this composition is administered 100 g of commercial deposits of sediment. During the day the flask with a mixture of paraffin and the solution incubated at room temperature, then the liquid is poured from a flask, and nerastvorim part of ASPO, remaining in the flask is weighed. Weight nerastvorim ASPO - 29, the Difference between hanging and nerastvorimaya ARPD (100 g - 29 g), adopted for the solubility of paraffin in the mixture indicated the Itza 1) define in a similar way.

Presented in table 1 data show that the proposed composition of the mixture for the removal of deposits can significantly increase its solvent capacity and to reduce the pour point.

The number of producing wells NGDU "Ascendeth" was held field test of the proposed structure as a solvent of paraffin deposits.

For dissolution and removal of sediment in the annulus six wells were pumped at 10 m3a mixture of 6 m3resin CORE, 1.5 m3resin KORS and 2.5 m3COURT (the composition of example 3, table 1).

The obtained data of field tests are presented in table 2 show that the use of the composition for cleaning wells from ASPO allows you to increase megacity period of 2-3 times, i.e. from 30 to 45 to 60 days; the production wells in the processing specified composition increase by 25-80%; however, the specific consumption of the composition is reduced in comparison with the accepted solvents (hot oil or heating oil) respectively 1.3 times. This is achieved by increasing the dissolving ability of the composition and the almost complete removal of deposits from the equipment surface and from the bottom-hole zone of the well.

The application is to increase the octane number of gasoline fractions of oil due to the aromatic part of the composition.

The composition for removing oil deposits, including by-product of the production of ethylbenzene, characterized in that as a by-product of the manufacture of ethylbenzene, it contains the VAT residue of ethylbenzene and additionally VAT residue of the distillation of styrene and VAT residue rectification tetramers of propylene - C12+the fraction of hydrocarbons in the following ratio, wt.%:

VAT residue of ethylbenzene - 20 - 80

VAT residue of the distillation of styrene - 5 - 30

C12+the fraction of oligomers of propylene - 15 - 50

 

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FIELD: soft abrasive materials based on mixed aluminum and iron oxides.

SUBSTANCE: method includes blending of raw components and subsequent heat treatment. Solutions of aluminum and iron sulfate with ammonia bicarbonate admixture heated to 40-600C are used as raw materials to produce slurry of aluminum and iron bicarbonates. Precipitate is separated by filtration, washed and dried. Heat treatment is carried out at 1150-12000C to provide solid solution expressed by general formula Al2-xFexO3, wherein x = 0.30-0.37. Mass part of iron oxide in finished product is 20-25 mass %. Abrasive materials of present invention are useful for finished polishing of metal parts, have polishing ability of 0.37-0.40 mg/min.cm2, provide roughness RZ = 0.07-0.08 mum after polishing and 85-90 %-yield of high-precision accepted metal parts.

EFFECT: environmentally friendly abrasive materials of improved quality.

1 cl, 3 ex, 1 dwg

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