The method of disposal asphaltoresinparaffin deposits and device for its implementation

 

(57) Abstract:

The invention relates to the field of oil production and refining. The method is as follows: ARPD loaded into the container 1, in which the pipe 15 serves hot water with a temperature not less than 92oWith, ASPO hot water is subjected to intensive mixing using the device for mixing 6, separating solids and debris, and forward them to islamological 14, where under the influence of hot water melted paraffin. In the melt is injected surfactant-demulsifier in an amount not less than 100 g/t), then the hot mixture of paraffin with Pavam injected into heated to 50-60oWith a hydrocarbon liquid (for example: commodity, oil, Stabika) into the container 2, in a ratio of 1:6-20 wt.h. respectively. The mixture is intensively stirred in the turbulent regime using the device for mixing 7, then the resulting mixture is injected through the pipe 18 into the pipeline with crude oil. The technical result is an increase in efficiency due to ensure complete utilization of deposits and giving a mixture of paraffin and hydrocarbon fluid properties pumpability through the pipeline at low temperatures, while excluding re paraffin deposition of cm is particular to methods and devices for recycling asfaltosmesitelnyh deposits (ARPD), accumulating in the repair of downhole equipment, as well as in tanks and sumps, and can be used on oil producing and refining companies in the industry.

During repair of wells associated with lifting equipment, raised a significant amount of deposits with the equipment. In addition, in the process of cleaning this equipment is also collected a significant amount of deposits that were previously dumped on the ground, polluting the environment. It should be noted that, on average, in the repair of one well were dumped on the ground up to 1000 liters of paraffin and 5-6 m3condensate oil content up to 750-1000 mg/l

Known method of disposal of oil sludge, according to which the sludge is mixed with oil mass ratio of 1: 2-4, the mixture is filtered, defend and dosed in commodity oil in an amount such that the content of regulated contaminants in commercial oil did not exceed permissible limits (see RF Patent N 2064962, CL 10 G 31/09, 1993).

However, this known method is not able to provide full utilization of such waste, as ASPO, due to the complex nature of the dissolution of the latter in the hydrocarbon liquid.

and ASPO, including melting paraffin, followed by dissolving it in a hydrocarbon liquid, in particular oil, and introducing the resulting mixture into marketable oil (see Express information. Series "Transport and storage of oil", M: VNIIEM, - 1990, N 5, S. 44-45).

However, this known method does not provide full utilization of deposits because the deposits contain large amounts of solids, which are difficult to dissolve in oil.

In addition, the resulting mixture of paraffin oil according to the method has a technologically acceptable rheological properties (pumpability) only at temperatures of more than +10oC and dramatically reduces the pumpability properties at low temperatures, which can lead to complications in the cold season.

However, when carrying out the known method does not exclude the process of re-paraffin deposition from crude oil in the oil storage reservoir, which may also lead to complications of the process of oil treatment.

Known installations for the disposal of sediment, including the capacity of the mixer (the scraper trap for accumulation and subsequent mixing paraffin oil, is supplied by a heater providing heat paraffin until the initial pump), providing for the dissolution of molten paraffin in the oil and circulation of the mixture through the tank of the mixer, as well as the connection of the output of a mixture of paraffin and oil for subsequent input into the oil collecting reservoir (see Express information. Series "Transport and storage of oil", M: VNIIEM, - 1990, N 5, S. 44-45).

A disadvantage of the known installation is the lack of efficiency of utilization of deposits due to the presence of mechanical impurities that interfere with the dissolution of paraffin oil.

In addition, the known device foresees the accumulation of sediment in the trap scraper and only after that the subsequent melting and dissolution of paraffin oil. Consequently the low efficiency of the installation due to the time consuming.

Another disadvantage is the inability to give a mixture of dissolved paraffin oil pumpability properties in the pipeline at low temperatures, since paraffin is subjected only to thermal stress (heat, melt) and the subsequent dissolution of paraffin oil, which is not enough to give a mixture of pumpability properties at low temperatures.

The purpose of the claimed inventions Yagodnoe fluid pumpability properties in the pipeline at low temperatures, while exception re paraffin deposition from a mixture.

This objective is achieved in that in the known method of disposal asfaltosmesitelnyh deposits, including melting, subsequent saturation of the hydrocarbon liquid and introducing the resulting mixture into the oil collecting reservoir, new is the fact that before melting asfaltosmesitelnyh deposits last process hot water with a temperature not less than 92oC under vigorous stirring in the turbulent regime, separating solids and after melting paraffin in the melt is injected surface-active substance (SAS)-the demulsifier in an amount not less than 100 g per ton of sediment, and the subsequent saturation of contamination with asphaltene deposits of hydrocarbon liquids is carried out by introducing a hot mixture of these deposits with Pavam in a hydrocarbon liquid, heated to 50-60oC, in a ratio of 1:6-20 wt.h. accordingly, when the intensive mixing in the turbulent regime.

From the patent and scientific literature we are not aware of the methods of disposal of deposits, including the set of features that allows you to draw a conclusion about the novelty of the proposed str>Due to the fact that paraffin processing hot water, melted and intensively mixed in the turbulent regime, separating solids and water, provided the change in the structure of deposits, allowing you to more fully and quickly dissolve them in later in the hydrocarbon fluid, in particular oil, and, therefore, would result in more complete utilization.

And due to the fact that paraffin is dissolved in the hydrocarbon liquid in a certain proportion, and also pre-treated with hot water and Pavon, is giving this mixture unexpected rheological properties, namely properties pumpability pipeline even in low temperatures.

Due to the fact that in a mixture of paraffin and hydrocarbon liquid surfactant is present in the claimed ratio and the mixture is subjected to intensive mixing in a special way, namely by creating a turbulent flow, is provided by the formation of a special fragmented small structures of resins, waxes and asphaltenes in the liquid, which excludes re paraffin deposition from a mixture with the introduction of the mixture into the flow of crude product.

This goal is achieved by affinitie deposits of hydrocarbon liquid, equipped with a heater, a device for mixing and socket output mix, what's new is that the installation is equipped with additional capacity, which is equipped with a heater, a device for mixing, semolale, elbows input and output of water and directing the stream that divides the capacity of the filtering and settling compartments, interconnected, while in the filtration compartment is placed the filter, and on the guides fixed angle catchers, the capacity of the installation are connected at the top by a pipe, which communicates with the dispenser surface-active substances, in containers-mixer also installed the guides thread.

Constructive installation for the disposal of sediment in the form of two adjacent containers allows sequentially melting paraffin, removal of these solids and dosing molten paraffin in a hydrocarbon liquid to saturation, thus ensuring full utilization of ARPD.

Performing in tanks installation guide flow device for mixing in the turbulent regime, and the presence of the heaters allows you to:

additional capacity is BR> - to separate solids and debris from the molten paraffin in the area of the filter, and to direct them in islamological;

- enlarge drops of water to separate the water from the melted paraffin in the settling zone;

and capacity-mixer allows you to:

- to create the best conditions for rapid and complete saturation of the hydrocarbon liquid paraffin with Pavon and to create the structure of the resulting mixture with properties of good pumpability through the pipeline at low temperatures.

To impart the desired rheological properties of the mixture of paraffin in the hydrocarbon fluid pipeline connecting both tanks installation provided with dispenser surfactant.

Thus, the proposed structural characteristics of the installation provide, according to the present method, high efficiency through full utilization of accumulating in tanks for various purposes ARPD and giving a mixture of paraffin and hydrocarbon fluid properties pumpability through pipelines at low temperatures while excluding re paraffin deposition from a mixture.

In the present application for patent complied with the requirement of unity of invention, since the method and the device are designed for the disposal Of hydrocarbon liquid required rheological properties for introducing the mixture into marketable oil during subsequent pumping it through the pipeline even in low temperatures.

The drawing shows a diagram of the installation for the disposal of ARPD.

The installation includes two tanks 1 and 2, United at the top by a pipe 3. In each of the tanks 1 and 2 respectively installed heaters 4 and 5, for example in the form of registers of heating devices 6 and 7 for mixing liquid, made, for example, in the form of propellers with electric drive, and the guides 8 and 9 of the thread. The container 1 is designed to melt paraffin and purification from mechanical impurities and debris. Guides 8 divide the container 1 on the filter 10 and 11 settling compartments, which are interconnected. In the filtration compartment 10 of the tank 1 is mounted a replaceable filter 12 that is designed to collect floating debris (rags, leaves, grass) and a device 6 for mixing. While on the guides 8 thread mounted at an angle catching 13, designed to capture solids and the direction of the settling compartment 11 in islamological 14.

The container 1 has a pipe 15 for supplying hot fresh water and the pipe 16 discharges into the barn.

The capacity of the mixer 2 is designed for installation saturation melted and purified paraffin hydrocarbon liquid. Supply of crude oil into the tank 2 through the liquid in the tanks 1 and 2, the installation is equipped with level sensors 19 and 20, as for the temperature control of the temperature sensors 21 and 22. For the introduction of surfactant-demulsifier in the melt pipe 3 communicates with the spout 23 SAS. And to ensure the dosed discharge of molten paraffin from the container 1 into the container-mixer 2 in the tank 1 is provided a device for overflow, made for example in the form of a float 23 driven flooding.

The inventive method in the described device is as follows:

- ASPO load capacity 1;

in the tank 1 through the pipe 15 serves hot water with a temperature not less than 92oC;

- ASPO hot water is subjected to intensive mixing using the device for mixing 6;

- separate the solids and debris and forward them to islamological 14;

under the influence of hot water melted paraffin;

in the melt is injected surfactant-demulsifier, for example, XT brand or disolve, in an amount not less than 100 g/t ARPD;

next hot mix paraffin with Pavam introduced via line 3 is heated to 50-60oC hydrocarbon liquid (for example: commodity, oil, Stabika) into the container 2, in a ratio of 1:6-20 wt.h. respectively;

the mixture is intensively stirred in the turbulent regime using the device for mixing 7;

For the disposal of ASPO used ARPD the following composition, %:

Asphaltenes - 5,47

Resin - 125,03

Paraffin - 35,9

Solids - 12,1

Water - 1

Sulfur - 1,82

Chlorides - 140 mg/l

Brought from a well specified ARPD in the solid state in the amount of about 500 kg loaded into the container 1 up to 500 HP Then into the tank 1 through the pipe 15 filed heated to 95oC hot fresh water. Specified temperature in the tank 1 supported by the heater 4. The contents of the container 1 was intensively mixed using a propeller 6, creating a turbulent regime. Release the solids were separated by catching 13 and settled in semolale 14, and floating debris (leaves, grass, etc.,) were collected in a removable filters 12. Then carried out technological sucks liquid for 0.5 hours On the water surface in the tank 1 is formed a layer of molten paraffin, purified from solids.

Further, these melted paraffin on line 3 was injected flow in the capacity of the mixer 2, which was heated to 60oC commodity oil, in the ratio of 1:10 respectively. Dosed discharge of molten paraffin deposition in tank 2 was produced by the float 23 driven flooding. PR is the third layer of the container 1 saw demulsifier "disolve" in the amount of 150 g/t ARPD. Then the mixture in the vessel 2 were subjected to intensive stirring for 20 min by means of screws 7, thereby creating a turbulent, then left on technological sucks on 10 minutes the Temperature in the vessel 2 is supported by means of the heater 5. Level sensors 19 and 20, installed in tanks 1 and 2, to monitor the liquid level and thereby exclude the uncontrolled flow of fluids from one container to another. Further, the oil-rich deposits from the vessel 2 was pumped through the pipe 18 into the primary reservoir, and further pumping was carried out on technologies thermochemical installation.

Studies have shown that even at low temperatures (3-5oC) ASPO not precipitated either in the raw material tank or in the future - in the trunk pipeline.

In addition to testing the proposed method and devices in the field conditions were conducted laboratory studies to determine the optimal modes of implementation of the proposed method. The obtained data are given in the table.

The data in the table show that only when the ratio of paraffin : a hydrocarbon liquid - 1:6-20 and in the turbulent regime PE the Proposed method allows you to fully utilize paraffin, thereby eliminating the environmental pollution.

The universal method of disposal for disposal for both large and small volumes of sediment. This recycling process can proceed continuously. The plant capacity is 500 kg ARPD for 1-1 .5 hours.

1. The method of disposal asphaltoresinparaffin deposits, including melting, subsequent saturation of the hydrocarbon liquid and introducing the resulting mixture into the oil collecting reservoir, characterized in that before melting asphaltoresinparaffin deposits last process hot water with a temperature not less than 92oWith vigorous stirring in the turbulent regime, separating solids and after melting asphaltoresinparaffin deposits in the melt is injected surfactant - demulsifier in an amount not less than 100 g per ton of sediment and subsequent saturation asphaltenesresinous deposits of hydrocarbon liquids is carried out by introducing a hot mixture of these sediments with surface-active agent in a hydrocarbon liquid, heated to 50-60oWith the ratio of 1:6-20 wt.h. accordingly, under vigorous stirring in turbul the awn-faucet saturation asphaltenesresinous deposits of hydrocarbon liquid, equipped with a heater, a device for mixing and socket o mixture, characterized in that the device has additional capacity, which is equipped with a heater, a device for mixing, semolale, the connection of the input and output of water and directing the stream that divides the capacity of the filtering and settling compartments, interconnected, while in the filtration compartment is placed the filter, and on the guides fixed angle catchers, the capacity of the installation are connected at the top by a pipe, which communicates with the dispenser surface-active substances, in containers-mixer also installed the guides thread.

 

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