SU1357655A1 - Method of transporting highly viscous and solidifying petroleums - Google Patents

Abstract

The invention relates to methods of transporting highly viscous and solidifying oils and allows transporting oil through pipelines under laying conditions in permafrost areas without heating due to pumping solid particles of oil in a stream of transporting medium. The method involves the formation of discrete bodies from oil in the form of granules by forcing the oil to a gel-like state through a grid with nozzles. To increase the specific volume of oil in the transport medium stream, as well as to increase the velocity of this stream, granules of different sizes are formed by using nozzles of different diameters. The optimal number of sizes of granules is from two to five, and their sizes are from 0.05 to 0.15 of the pipeline diameter. 1 3. Clause f-ly. S (L 00 O1 O5 SP Sl

Description

The invention relates to pipeline transport of oil and is primarily intended for transporting highly viscous and solidifying oils under pipeline conditions in permafrost regions.

The aim of the invention is to increase the productivity of the oil transportation process.

The goal is achieved due to the fact that the formation of discrete bodies from oil is carried out by cooling the oil below its freezing point. obtaining a gel-like mass and forcing this mass through a lattice with nozzles of different diameters.

environment (water), therefore, as such an environment, it is necessary to use liquids that do not freeze under these conditions, for example, mineralized formation waters.

At the receiving stations, the oil is easily separated from the water, since oil and water are mutually insoluble, and maintaining the required temperature throughout the pipeline’s route (since it is a permafrost region) prevents the oil from transitioning from solid to liquid and mixing it with water to form emulsions.

The method allows to improve the performance of the pipeline, due to the low

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meters with the formation of oil granules of different, 5 magnitude of the viscosity of the transported medium, sizes, and the number of sizes of granules must be at least two.

The essence of the method is as follows.

Highly viscous oil at the place of its production or immediately before transportation is cooled. Ao temperature below its freezing point. The resulting mass is passed (pushed) through the grid with nozzles of different diameters. The number of nozzles that differ from each other must be at least two and can be up to five. Here, the minimum size of the diameter of the nozzles is 0.05-0.15 of the diameter of the transport pipeline, and the maximum size of the diameter of the nozzles is 0.15.

The resulting granules of different sizes are fed into the cooled water (the water temperature should be 1.5-2.0 ° below the oil freezing temperature), due to which the granules solidify with the formation of a protective bronzing shell of paraffins, asphaltines on their surface and mechanical impurities.

After this treatment, the granules are loaded into the feeder of the pipeline transport system. In the same pipeline, liquid is transported under pressure to the export medium, in the flow of which the oil granules are pumped.

Since the transportation of granules must be conducted without their destruction and mutual adhesion along the entire length of the transport pipeline 45, the temperature must be maintained below the freezing point of high-viscosity oil.

The use of this method in the conditions of pipeline construction in permafrost regions requires the adoption of measures that preclude freezing by the transport 40

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the most dense packaging of the cross section of the pipeline with granules of various sizes with a significant reduction in the capital and operating costs.

For example, a pilot industrial oil pipeline connecting the Khar Ginskoe and Vazeyskoye fields (Arkhangelsk Oblast) for pumping 0.7 million tons per year of solidifying oils containing 15-26% paraffin, at a pour point within (+) 9- (+) 33 ° С provides for transportation in a state heated to 70 ° С, which requires additional means for thermal insulation, a heating station, etc.

When applying the method, it is possible to significantly reduce the costs of both construction (due to the rejection of heating stations, thermal insulation), and the operation of the pipeline, as well as increase its oil capacity.

Claims (2)

Invention Formula . A method of transporting highly viscous and solidifying oils, including the formation of discrete bodies from oil, their introduction into the pipeline and pumping them with a stream of water under pressure, characterized in that, in order to increase productivity by increasing the pumping speed, discrete bodies are formed - zero of different sizes constituting 0.05-0.15 of the diameter of the pipeline, and the temperature of the transporting medium along the pipeline route is maintained below the freezing point of oil. 2. A method according to claim 1, wherein discrete bodies are formed by cooling the oil below its freezing temperature and forcing the resulting mass through a grate with nozzles of different sizes. Compiled by I. Peto n Editor G. GerberTehred I. VeresKorrektor I. Erdeyi Order 5493/35 Circulation 453 Subscription VNIIPI USSR State Committee on Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4 environment (water), therefore, as such an environment, it is necessary to use liquids that do not freeze under these conditions, for example, mineralized formation waters. At the receiving stations, the oil is easily separated from the water, since oil and water are mutually insoluble, and maintaining the required temperature throughout the pipeline’s route (since it is a permafrost region) prevents the oil from transitioning from solid to liquid and mixing it with water to form emulsions. The method allows to improve the performance of the pipeline, due to the low viscosity of the conveyed medium viscosity of the conveyed medium the most dense packaging of the cross section of the pipeline with granules of various sizes with a significant reduction in the capital and operating costs. For example, a pilot industrial oil pipeline connecting the Khar Ginskoe and Vazeyskoye fields (Arkhangelsk Oblast) for pumping 0.7 million tons per year of solidifying oils containing 15-26% paraffin, at a pour point within (+) 9- (+) 33 ° С provides for transportation in a state heated to 70 ° С, which requires additional means for thermal insulation, a heating station, etc. When applying the method, it is possible to significantly reduce the costs of both construction (due to the rejection of heating stations, thermal insulation), and the operation of the pipeline, as well as increase its oil capacity. Invention Formula . A method of transporting highly viscous and solidifying oils, including the formation of discrete bodies from oil, their introduction into the pipeline and pumping them with a stream of water under pressure, characterized in that, in order to increase productivity by increasing the pumping speed, discrete bodies are formed - zero of different sizes constituting 0.05-0.15 of the diameter of the pipeline, and the temperature of the transporting medium along the pipeline route is maintained below the freezing point of oil. 2. A method according to claim 1, wherein discrete bodies are formed by cooling the oil below its freezing temperature and forcing the resulting mass through a grate with nozzles of different sizes.