Method of preparing and utilizing low-pressure gas

FIELD: pipeline transport.

SUBSTANCE: method comprises intensifying extraction of low-pressure gas in tanks of oil stabilization due to rarefying gas in the inlet gas collector that connects the tank with the inlet of liquid-gas jet compressors by mixing the pumping product with active agent and increasing initial pressure of the low-pressure gas up to the pressure required by a consumer with simultaneous condensation of C5+ fraction. The gas-liquid mixture is supplied to the air cooling apparatus. After the separation of gas from the active agent, purifying and drying the compressed gas is intensified by supplying the compressed gas into the vortex pipe and, then, to the consumer.

EFFECT: improved method.

1 dwg

 

The invention relates to the exploitation of oil and gas fields.

In the oil and gas industry in the production and preparation of oil to transport associated low-pressure gas (APG), which differs from the natural gas high content of ethano-butane-propane components, in most cases eliminated discharge to the atmosphere by burning torch devices. The total volume discharged to the atmosphere gas in the oil industry in Russia is more than 6.0 billion m3in year. The combustion of this gas creates a large environmental burden on the environment, as the areas oil and its processing. It is economically and ecologically not sustainable.

The bulk of associated gas separated from the oil on the head pumping stations (STS), which makes it technically possible recycling.

For the collection and compression of low-pressure gas is used gazgoldernay the way in technological processes which apply screw and reciprocating compressors. However, they have drawbacks that limit their applicability. For example, the reliability of screw compressors when kompremirovannyj APG is sharply reduced in the case of condensation and dissolution in the lubricating oil, which degrades the quality of the oil and accelerates the output of compressor failure. Constant regen the walkie-talkie oil requires additional capital and operating costs. The nomenclature of the existing screw compressors, both on the supply and the discharge pressure, not fully satisfy the requirements gathering, preparation and transportation of the associated gas in oil production because of the technical-economic indicators of screw compressors sharply reduced at partial load volume flow of compressed gas.

Piston compressors for the compression of APG is not widely used in industry because of the significant capital and operating costs and long payback periods. In addition, the operation of these compressors significantly complicated in the presence of the liquid droplet in gas, loss of gas condensate at kompremirovannyj or the presence of suspended solid particles. The use of reciprocating compressors require a significant amount of auxiliary equipment - intermediate separators, heat exchangers, a complex system of control and regulation, etc. in Addition, it is necessary to construct special facilities to accommodate the equipment.

In another method for collection and preparation of APG apply centrifugal compressors, which are unstable due to condensation of liquid hydrocarbons from APG and require large capital investments.

Known low-temperature method for the utilization of associated g is for oil production using three-flow vortex tube (TVT), however, it is effective only when a significant pressure drop, and therefore cannot be used for drying the low-pressure gas.

Closest to the claimed is a method of collection and utilization of methane and other hydrocarbon gases from coal deposits - EN 2181446 C1 (prototype).

However, this method does not solve the problem effectively clean "fat" hydrocarbon gases, what is APG.

Because of these disadvantages of the above methods are not widely used.

We propose a method of preparation and the utilization of associated petroleum low-pressure gas ejection using liquid-gas jet compressors and adjustable three-flow vortex tube Wound-hilsa for low-temperature drying and cooling of the gas.

The invention solves the problem of optimization of process control collection and utilization of associated gas by automatically switching on and off of the operation of jet compressors and pumps depending on the pressure of the gas in the inlet manifold, which makes this process technically possible and economically feasible for use on an industrial scale in the production of gaseous and liquid hydrocarbon fractions, the elimination of emissions and improving the environment.

This technical financial p the tat is achieved by in the method of pumping-ejector compressor plant (NEK), which operates in a wide range of changes in the parameters of the gas can easily be transferred from one mode to another, compresses the gas temperatures of the particles of the condensate and condensing in the compression process pairs, solid inclusions, simultaneously with compression to drain and purge gases from acid components or carry out their drying from water, provides the vacuum in the inlet gas manifold, and the amount of the minimum suction pressure mainly depends on thermophysical properties of the working fluid that helps in the intensive selection of associated gas from oil tanks oil stabilization on STS. NEKU simple in design, does not require oil stations, mounted in an open area, do not require highly qualified personnel, have a low payback period.

The pressure increase associated low-pressure gas using the NEC allows to intensify the process of cleaning and drying pumped gas in three-flow vortex tube.

For the sealing process and prevent losses during transfer of liquid in the method used basellaceae centrifugal pumps with magnetic coupling. The use of pump-ejector compressor unit in the complex of the jet to which pressrow and three-flow vortex tube solves the technical problem of automating the process of collection and utilization of APG with small capital, energy and operating costs.

The process is illustrated by the drawings, which shows a schematic diagram of the pump-ejector compressor installation with jet compressor and three-flow vortex tube.

APG from collector 1 or separator (not shown) of the flare facility STS is input to the liquid-gas jet compressors SC-1/1,2. As the working fluid in SC-1/1,2 water is used or inhibitors, supplied by pipeline 2 with basilnikov centrifugal pumps with magnetic coupling N-1/1,2 (N-1/3 - reserve). In the process of mixing liquids and associated gas (gas) in the jet apparatus is compressed gas with an initial pressure to the pressure of consumption. Simultaneously with compression is the process of condensing fractions With5+.

After jet compressors SC-1/1,2 gas-liquid mixture is fed into the air cooler the air cooler and pipes 3 into the separator s-1, where the gas is separated from the working fluid. Compressed gas is delivered from the separator s-1 to line 4 in the three-flow vortex tube, where the result of a Wound-hilsa there is an additional cleaning and drying gas. Dry gas is delivered to the consumer through the pipeline 5. The extracted liquid in the separator s-1 flows through the pipe 7 into the reservoir tank E-2, and three-flow vortex tube TW t is unaproved 9 in tank E-2. Liquid hydrocarbons separated in the separator s-1 and in the capacity of E-2 is pumped by pump H-2 on the collector 6 in the technological system, and the water fraction of the E-2 is disposed on the collector 11. The working fluid of the s-1 can act on the reception of pumps N-1/1,2 in two ways: either from the collector 7, either through the existing tank E-1 via line 10. For more efficient allocation of komprimierung gas liquids possible application of the recuperator-heat exchanger to the vortex tube.

Automatic switching on and off of the operation of jet compressors SC-1/1,2, and pumps H-1/1,2 is depending on the pressure of the gas in the inlet manifold that allows you to adjust the performance of the NEC on pumped gas, ensuring the stability of the process parameters.

The claimed method has a high degree of energy saving and does not require additional costs for heating and cooling of liquids and gas in the process.

The proposed method differs from existing methods of collection, preparation and utilization of APG:

- the use of jet compressors that do not require preliminary drying gas from moisture and purification from solid impurities before komprimirovannom;

the effect of Wound-hilsa received in an adjustable three-flow vihr the new pipe for a deep cleaning and drying gas;

- use pump-ejector compressor to provide automatic capacity control capacity of exhaust gas depending on the pressure associated gas at the inlet manifold;

- use basilnikov centrifugal pumps with magnetic couplings for the collection and compression of APG and simultaneous adsorption of gas to feed into the system consumption, ensuring tightness and no loss of fluid;

- economy;

- environmentally friendly.

The method of preparation and utilization of low-pressure gas using the pump-ejector compressor, which consists in gathering, product flow, increasing its pressure with the use of the working fluid in the liquid-gas jet compressor, separation and extraction of marketable gas, characterized in that intensify the allocation of associated low-pressure gas (APG) in tanks oil stabilization (RDA) by creating a vacuum in the inlet gas manifold connecting the RSN input liquid-gas jet compressors, by mixing them in the pumped product with the working fluid and increasing the initial pressure APG to pressure with simultaneous consumption condensation fraction C5+direct gas-liquid mixture in the apparatus vozdushnokosmicheskaya, and after the separation in the separator gas from the working fluid intensify the cleaning and drying compressed gas, for which the latter sent to the three-flow vortex tube, where the dry gas is sent to the consumer.



 

Same patents:

FIELD: pipeline transport.

SUBSTANCE: power plant is additionally provided with a turbine expander provided with an electric generator. Power generated by the steam plant is directed to the main gas pipeline, and a part of power is directed to the turbine expander with electric generator to produce electric power.

EFFECT: enhanced reliability and efficiency.

1 cl, 1 dwg

The invention relates to techniques for managing operations of the process gas transportation

The invention relates to pipeline transport

The invention relates to transport gas and is used to restore the high concentration of inhibitors

The invention relates to the field of pipeline transport of gas

The invention relates to the field of pipeline transport of gas
The invention relates to oil and gas industry and can be used in the development and exploitation of gas fields, namely for transportation of natural gas, including associated

The invention relates to oil and gas industry and can be used in the processes of field and factory processing, hydrocarbon gas, in particular, upon cooling, the crude hydrocarbon gas booster compressors before the subsequent drying and preparation for transport

The invention relates to pipeline transport and can be used for transportation of compressed gas through pipelines, in particular, on the areas of large extent, related to the impossibility or difficulty of construction of the intermediate compressor stations

The invention relates to a device for the movement of gas through

FIELD: pipeline transport.

SUBSTANCE: power plant is additionally provided with a turbine expander provided with an electric generator. Power generated by the steam plant is directed to the main gas pipeline, and a part of power is directed to the turbine expander with electric generator to produce electric power.

EFFECT: enhanced reliability and efficiency.

1 cl, 1 dwg

FIELD: pipeline transport.

SUBSTANCE: method comprises intensifying extraction of low-pressure gas in tanks of oil stabilization due to rarefying gas in the inlet gas collector that connects the tank with the inlet of liquid-gas jet compressors by mixing the pumping product with active agent and increasing initial pressure of the low-pressure gas up to the pressure required by a consumer with simultaneous condensation of C5+ fraction. The gas-liquid mixture is supplied to the air cooling apparatus. After the separation of gas from the active agent, purifying and drying the compressed gas is intensified by supplying the compressed gas into the vortex pipe and, then, to the consumer.

EFFECT: improved method.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: device comprises device for enhancing and reducing pressure, receiving gas line for supplying the plant with the gas, discharging gas line through which the gas after purification is supplied from the plant, two vortex pipes, ejector, and condensate collector. The inlet of the first vortex pipe is connected with the receiving gas line and outlet of the cold gas flow of the second vortex pipe through the device for enhancing or reducing pressure. The output of the hot flow of the first vortex pipe is connected with the inlet of the first separator through the ejector, and the condensate outlet of the separator is connected with the inlet of the second vortex pipe. The outlet of the cold flow of the second vortex pipe is connected with the receiving gas.

EFFECT: enhanced quality of purification.

1 cl, 1 dwg

FIELD: preparation and transportation of petroleum associated and natural gases.

SUBSTANCE: invention relates to preparation of gas for transportation along gas pipeline and separation of heavy fraction condensate from gas. Proposed plant for preparation of petroleum associated gas or natural gas for transportation along gas pipeline and obtaining of liquid hydrocarbons from gas intake line, device to increase and decrease pressure, gas flow line, liquid hydrocarbons extraction line, three-circuit heat exchanger, separator, expansion valve, two regulating valves and swirl pipe whose input is connected through pressure increasing and decreasing device from one side with inlet gas line through first regulating valve and through series-connected second regulating valve and first circuit of heat exchanger, and from other side, with output of expansion valve. Output of cold flow of swirl pipe is connected through second circuit of heat exchangers with gas flow line, output of hot flow of swirl pipe is connected through third circuit of heat exchanger with input of separator whose condensate output is connected with line to remove liquid hydrocarbons, and gas output, with input of expansion valve.

EFFECT: increased degree of separation of condensate of heavy fractions of hydrocarbons from petroleum associated gas or natural gas designed for transportation along gas pipeline.

1 dwg

FIELD: the invention refers to energy-conservation technologies of pipeline transportation of natural gas.

SUBSTANCE: it may be used for controlling the technological process of the main pipeline with simultaneous selection out of gas of valuable ethane, propane, butane components. The technical result of the invention is reduction of energy inputs for maintaining pressure in the main pipeline, provision of stabilization of pressure in the main pipeline. The mode of transportation of natural gas along the main pipeline includes its feeding into the main pipeline on the first and the following compressor stations and giving out natural gas from the main pipeline through gas reducing stations and divide it on two flows one of them is directed into the pipeline of high pressure, and the other into a consumer pipe-bend. At that the gas of consumer pipe-bend is preliminary cooled and cleared from condensed and hard fraction, and then further cooling is executed till the temperature below the point of condensation of methane and division of cryogenic liquid and directed to the user, and out of received cryogenic liquid methane is separated from liquid ethane-propane-butane fraction which is returned into the pipeline of high pressure and further into the main pipeline, and detailed methane is directed into the pipe-bend. At that the gas in the pipeline of high pressure is preliminary additionally cooled, compremirated and returned into the main pipeline.

EFFECT: reduces power inputs.

7 cl, 1 dwg

FIELD: storage or transporting of natural gas.

SUBSTANCE: method comprises cooling natural gas down to a temperature below the temperature of the ambient air and transporting the cooled natural gas.

EFFECT: enhanced efficiency of storage and transporting.

16 cl, 13 dwg

FIELD: gas industry.

SUBSTANCE: method comprises separating the mixture into C1 methane fraction with subsequent supply to gas pipeline and C2+ hydrocarbon fraction that are preliminary stabilized by its liquefying by means of preliminary cooling down to a temperature at least 16°C and supplying to the gas pipeline. The pressure is maintained at a level no less than 3,2 MPa.

EFFECT: enhanced reliability of one-phase transporting.

2 dwg

FIELD: oil industry.

SUBSTANCE: supersonic tube comprises Laval nozzle, cyclonic separator with the blade, diffuser for discharging dried gas, and diffuser for discharging condensed liquid. The blade is made of deformed plate set in the screw groove made in the inner side of the cyclonic separator. The length of the plate is at least ½ of the pitch of the screw groove. The housing of the tube of the cyclonic separator receives locking members whose faces enters the screw groove. The distance between the adjacent locking members mounted in the screw groove is equal to the length of the plate.

EFFECT: enhanced efficiency.

4 dwg

FIELD: natural gas industry; other industries; production of the gas pipeline blowoff valves.

SUBSTANCE: the invention is pertaining to natural gas industry and is intended for blowing through of the gas pipelines. The technical result of the invention is the increased efficiency of usage of the gas pipeline blowoff valves at augmentation of the quantity of the delivered for utilization of the waste heavy hydrocarbon fractions of the natural gas for their additional condensation in the area of formation of the microswirlings between the exterior funnel-shaped and interior perforated conical walls. In the gas pipeline blowoff valve in the holes of the perforated conical wall there are the curvilinear grooves, which curvature is directed counterclockwise, and the curvature of the guiding vanes is made in the clockwise direction.

EFFECT: the invention ensures the increased efficiency of usage of the gas pipeline blowoff valves.

4 dwg

FIELD: gas conveyance means, particularly gas-main lines, gathering lines and manifolds of gas fields for condensate recovery.

SUBSTANCE: device to prevent condensate plug forming in pipeline comprises pipeline with inclined sections and connection elbows with enclosing channel. Discharge condensate pipe is formed in lower part of connection elbow. Condensate pipe is located in funnel-shaped enclosing channel and is connected to accumulation vessel located below ground freezing level. Condensate removal pipeline is installed in accumulation vessel so that the condensate removal pipeline is coaxially retained in vertical enclosing channel.

EFFECT: possibility to maintain thermal gas pipeline regime, which prevents condensate freezing, to remove accumulated condensate due to usage of steam condensation heat generated during condensation of steam present in conveying gas flow.

1 dwg

Up!