Underwater system (versions) and method for multiphase media separation

FIELD: oil and gas industry.

SUBSTANCE: underwater separation system for multiphase media containing oil, water and sand, contains an inlet manifold (204), a divider (206), separate pipelines (208, 210) of similar diameter. An adjustment chamber (214) having larger diameter than the separate pipelines (208, 210) of similar diameter is connected to the ends of the separate pipelines (208, 210). The adjusting chamber (214) includes discharge pipelines (216, 218) and is made to correct the fluid flow rate at the discharge pipeline. A sand receiver (212) is connected to the separate pipelines (208, 210), which is located below one of the separate pipelines (208, 210). Inside one of the separate pipelines (208, 210) there is a jet nozzle, connected to the lower outlet pipeline of the adjastment chamber (214). The underwater separation system also includes a control valve and a control system. The multiphase fluid is passed through separate pipelines (208, 210) downstream of the divider (206) and separated into oil and water phases. The solid particles are separated. The water flow through the outlet channel at the lower end of the adjustment chamber (214), and the oil flow through the outlet at the upper end of the adjustment chamber (214) are provided. Water is injected into the receiver (212). A cyclone is formed to remove sand inside the receiver (212) and remove the stirred-up solid particles from the receiver (212) without stopping or slowing down the steps of multiphase fluid flow and its separation.

EFFECT: invention allows to adjust flows in each line, reduce power consumption, increase the productivity of underwater well, and to create compact underwater separation system.

17 cl, 6 dwg

 



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: invention proposes a system and a method of control of a cyclone located under water and intended for separation of oil from water. A cyclone is located so that it can receive water together with an oil component via an inlet pipeline; oil is separated from water and supplied through an outlet oil hole to an outlet oil line, and water is supplied through an outlet water hole to an outlet water line. The system includes a control valve installed in the outlet oil hole and the outlet oil line at the cyclone outlet, the first measuring pressure drop transducer located between the inlet pipeline and the cyclone outlet oil hole, and the second measuring pressure drop transducer located between the inlet pipeline and the cyclone outlet water hole. In the outlet water hole or the outlet water line there located is a sensor intended to measure oil content and functionally connected to the control valve with control means. Besides, the control valve can be operated according to the specified value of the ratio between the first and the second pressure drops; besides, this setpoint and a degree of opening of the control valve can be controlled in response to variation of oil content in water, which is measured with the specified sensor.

EFFECT: proposed group of inventions provides more accurate control and verification of a separation effect.

6 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to water depletion by gases. It comprises pipe system including one wildcat pipe to receive gas-bearing fluid, one injection pipe to force gas-depleted fluid back and at least two gas traps arranged in the device to create necessary pressure. Note here that said gas trap is connected with wildcat pipe and injection pipe so that fluid from wildcat pipe can be directed via gas trap to injection pipe. Said gas trap can be connected with gas intake device. Note also that said gas traps are vertically spaced apart and spaced from relatively depleted fluid deposit. They are communicated so that fluid lifting in wildcat pipe gets into first gas trap located at the first level of pressure whereat first gas or gas mix is separated. Then, depleted fluid gets into second gas trap at the same pressure level to extract second gas/gas mix. Note here that said first and second pressures differ while separate gas traps can be communicated with one or several gas intake devices. Or, one or several sets of gas traps can be connected with common gas intakes. Besides, this invention covers appropriate methods and application versions.

EFFECT: higher efficiency of gas separation from fluid.

20 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: first and second multiphase flows are treated in the first and the second process lines that are structurally different from each other. With that, different operating conditions are created in the first and the second process lines. The first and the second gaseous hydrocarbon flows and the first and the second liquid hydrocarbon flows are formed in the first and the second process lines. The first and the second gaseous hydrocarbon flows are combined downstream of the first and the second process lines so that a combined gaseous hydrocarbon flow can be obtained.

EFFECT: possible presentation of multiple pipelines with methods providing an individual flow, and then, after process lines, the gaseous hydrocarbon flows are combined for further combined treatment.

19 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: underwater plant contains pipe-lines system which includes the first header connected with at least one well and at least two first pipe branches with inlet channel connected with the first header. First pipe branches contain at least two outlet channels. The first header and first pipe branches are located in the first plane, and one of outlet channels of first pipe branches leads to the second header. According to the invention, the second of outlet channels of first pipe branches leads to at least two second pipe branches located in the second plane below the first plane. At least one of specified outlet channels forms inlet channel of second pipe branches. Second pipe branches contain at least one inlet channel leading to the third header. Longitudinal axis of the first header is perpendicular to longitudinal axes of first pipe branches. First pipe branches are located so that their longitudinal axes are parallel to each other.

EFFECT: providing underwater plant which, as applied to pump, will operate as buffer system or, as applied to recovery of oil-and-gas wells, as a system for destruction of possible plugs which may be formed, or it will operate as a separator of well product phases, for example oil-gas, oil-gas-water, oil-water.

12 cl, 2 dwg

FIELD: mining.

SUBSTANCE: plant includes at least one compact separation unit on the basis of cyclone, gas outlet, and one or several tube separators. Cyclone is chosen from feedthrough phase separator and feedthrough. At that, compact separation unit has the possibility of receiving multiphase flow for its separation into gas flow and flow mainly containing the fluid. Gas outlet has the possibility of receiving gas flow from compact separation unit and any additional gas flows. Tube separators have the possibility of receiving the flow mainly containing the fluid from compact separation unit and flows additionally containing the fluid, which has fluid outlet at least from one tube separator in its lower part. Plant includes mainly additional components.

EFFECT: reduction of the plant weight and improvement of protection against excess pressure.

11 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: during balancing of water-intake capacity of two wells there chosen is a pair of wells with low water-intake capacity and high water-intake capacity; working medium is pumped to the well with low water-intake capacity, drained from the well and pumped to the well with high water-intake capacity. As working medium there used is water solution of surface-active substance with density of more than 1.17 g/cm3 and solvent of paraffin. After the working medium is pumped to the well with low water-intake capacity, process exposure takes place, and after the working medium is drained from the well with deposits removed from the well in the form of viscous emulsion, the viscous emulsion is pumped to the well with high water-intake capacity; geophysical investigations are performed on both wells and wells are put into operation.

EFFECT: increasing balancing efficiency of profile of the well water-intake capacity.

1 ex

FIELD: oil and gas production.

SUBSTANCE: convex catcher of products of gas-hydrates decomposition (CPGHD) is lowered to sea bottom on suspended device from water-craft board. Internal volume of CPGHD is isolated from external sea medium. Sea water with bottom sediments is pumped off from the catcher by means of an electric pump; thus reduced hydro-static pressure in the catcher facilitates decomposition of gas-hydrate under the catcher into fresh water and gas. Gas is withdrawn into reservoirs of the water-craft or into gasholders, or to the shore for successive utilisation via a flexible pipe. If necessary, produced fresh water is pumped via another flexible pipe with its own electric pump to the water-craft or to the shore. Under effect of proper weight CPGHD sinks into a basin till process of decomposition of gas-hydrate reaches sole of its reservoir. CPGHD is lifted to bottom surface and is transferred to a neighbour section of a gas-hydrate deposit.

EFFECT: raised efficiency of extraction of methane and fresh water on shelf and continental slope of World ocean in arid regions.

1 dwg

Tube separator // 2380532

FIELD: oil-and-industry.

SUBSTANCE: tube separator contains elongated tube case with inlet device, which includes an entrance pipeline and a gas collector. The tube separator diametre is the same or greater than the entrance pipeline diametre. The gas collector connected with the entrance pipeline and contains some amount of vertical gas exhaust pipes, connected to the entrance pipeline directly before the entrance into the tube separator. Gas exhaust pipes end in located above gas collecting pipe. At that the gas collector executed in a way that gas directs upwards through vertical gas exhaust pipes and collects in the gas collecting pipe for returning into exit pipeline after the tube separator or transports further forward into a gas holder or gas processing plant. The entrance pipeline has increased pipe diametre at the tube separator entrance under the last of the vertical gas exhaust pipes.

EFFECT: plug leakage avoidance and ensuring steady fluid medium flow into the tube separator.

4 cl, 3 dwg

Tube separator // 2380531

FIELD: oil-and-gas industry.

SUBSTANCE: separator contains elongated tube case with injection hole, and at least one discharge hole, connected to the injection pipe and at least one discharge pipe. Case diametre is usually the same or a bit greater than the injection pipe diametre, and at least one discharge pipe diametre. Longitude path - part of the case from the inlet until at least one discharge hole is bended. The tube separator connected with a slab of a frame structure for the well sub-sea production and forms the frame stricture bearing part.

EFFECT: separator compact dimensions, adjusted to the field or structure and function widening.

17 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to separation of oil, gas and water at extraction and production of oil and gas from deposits under sea bottom. Separator consists of a lengthy tube case with input and output ends; diametre of the case at output and input ends is either equal or slightly bigger, than the diametre of the transporting tube whereto the case of the separator is attached. Further, the separator consists of electro-static coagulator made in form of a tube. Also the coagulator includes electrodes made so, that by means of electric voltage supplied to them electrostatic field is generated inside the tube. According to the invention the electrostatic coagulator is combined with the case of the separator, creates with the latter an integral unit and is installed at a distance from the input, where preliminary separation of oil and water occurs. The coagulator has upper and lower electrodes. The installation for separation contains the above said separator and cyclone. The method of separation provides implementation of the above said separator.

EFFECT: increased efficiency of the method and increased reliability of installation operation.

9 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: group of inventions relates to method of separating harmful substances from gas flow and deals with removal of harmful substances from carbon dioxide and device for its realization. Method of separating harmful substances from gas mixture, which mainly contains carbon dioxide CO2, as well as valuable substances such as hydrogen H2, carbon monoxide CO, nitrogen N2 or noble gas, in which CO2 condensation is realised in order to separate liquid CO2. As harmful substance hydrogen sulphide H2S or carbonylsulphide COS is processed. Adsorption separation of H2S or COS from liquid CO2 is realised. Temperature of method is set in the range from -30C to -70C.

EFFECT: invention provides energy-preserving possibility for removal of harmful substances in electric power plants with main heating be means of fossil fuel.

8 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: disclosed waste water treatment apparatus includes, mounted in a sewer manhole 8, an open-top settling chamber 1 with a continuous lateral surface 5 and a bottom part 6 and a filtering chamber. The filtering chamber is mounted in the settling chamber such that the bottom parts 12 and 6 thereof are separated from each other, and a gap is formed between the lateral surfaces. The filtering chamber is divided by a continuous partition wall 4 into a lower filtering compartment 3, having a continuous lateral surface 11, and an upper open-top receiving compartment 2, having water passage openings 9 in the lateral surface. The filtering chamber has a bottom part 12 with water passage openings, and a filter material 13. The filter material 13 is placed in the lower compartment 3. Inside the settling chamber 1 and inside the lower compartment 3 of the filtering chamber there is a vertical overflow tube 15, having a continuous lateral surface 16, such that the overflow tube 15 passes through the bottom part 6 of the settling chamber 1 and the bottom part 12 of the lower compartment 3 of the filtering chamber, and its upper open-end portion 17 is located in the lower compartment 3 of the filtering chamber to allow water passing through the filter material 13 to fall into said end portion 17.

EFFECT: longer service life of the filter material before replacement thereof.

2 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes measuring oil and water density, delivering raw oil with associated gas to the well killed by a packer through a spool, measuring quantity of delivered raw oil with associated gas as well as water-cut of raw oil, determining quantity of delivered dehydrated oil, discharging partially dehydrated oil and associated gas from annular space of the well, removing discharged water through inner annulus, measuring quantity of discharged water, measuring pressure of raw oil with associated gas at the well input, pressure of partially dehydrated oil with associated gas at the output from annular space of the well and pressure of discharged water at the output from inner annulus. Regulation is carried out by changing square area of the flow areas at the well input, at the output from annular space and at the output from inner annulus, for example, by means of gates, wherein at one or more of the above areas integral water-cut and height of these areas is measured, volumes of these areas are measured, quantity of dehydrated oil is calculated for these areas and compared with quantity of dehydrated oil delivered to the well.

EFFECT: improved reliability of the well operation control.

3 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: block-modular coalescent filter is used to split a stream into two separation zones of different volume, the first zone for primary purification and the second zone for final purification; in the first, larger primary separation zone, the flow rate of the liquid stream is reduced by expanding the stream and the stream is fed for further energy dissipation into variable-cross-section collectors with slit-type gaps of different cross-section, equipped with internal deflectors of different size and bending radius, after which the stream is split by gravitation into phases which are removed from the primary separation zone; the primary-purified liquid with oil product residues is fed through the block-modular coalescent filter into the secondary separation zone for final purification, where the stream is also split by gravitation into phases which are removed from the secondary separation zone; when pressure drop on the block-modular coalescent filter increases, the liquid stream is automatically fed into the secondary separation zone in a filter bypass, through protective devices.

EFFECT: efficiency and reliability with prolonged operation without stopping the apparatus for repairs for filter replacement.

3 dwg

FIELD: chemistry.

SUBSTANCE: block-modular coalescent filter is used to split a stream into two separation zones of different volume, the first zone for primary purification and the second zone for final purification; in the first, larger primary separation zone, the flow rate of the liquid stream is reduced by expanding the stream and the stream is fed for further energy dissipation into variable-cross-section collectors with slit-type gaps of different cross-section, equipped with internal deflectors of different size and bending radius, after which the stream is split by gravitation into phases which are removed from the primary separation zone; the primary-purified liquid with oil product residues is fed through the block-modular coalescent filter into the secondary separation zone for final purification, where the stream is also split by gravitation into phases which are removed from the secondary separation zone; when pressure drop on the block-modular coalescent filter increases, the liquid stream is automatically fed into the secondary separation zone in a filter bypass, through protective devices.

EFFECT: efficiency and reliability with prolonged operation without stopping the apparatus for repairs for filter replacement.

3 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing epoxy compounds, which includes adding an oxidant, a water-soluble manganese complex and terminal olefin to obtain a polyphase reaction mixture; reacting the terminal olefin and oxidant in the polyphase reaction mixture comprising at least one organic phase, in the presence of the water-soluble manganese complex; dividing the reaction mixture into at least one organic phase and an aqueous phase and recycling at least a portion of the aqueous phase. The water-soluble manganese complex is a mononuclear particle of general formula (I): [LMnX3]Y, or a binuclear particle of general formula (II): [[LMn(-X3)MnL](Y)n, where Mn is manganese; L or each L is independently a polydentate ligand; each X is independently a coordinating particle and each -X is independently a bridging coordinating particle, and where Y is a non-coordinating counterion.

EFFECT: efficient use of the catalyst and high end product selectivity of the process.

17 cl, 1 dwg, 1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of separating acetonitrile from water and can be applied in processes of epoxydation of propylene with hydrogen peroxide. The claimed method of separating acetonitrile from water contains stages (i)-(iv). At stage (i) supplied is flow S1, containing, at least, 95 wt % of the total weight of S1, acetonitrile and water, where the weight ratio acetonitrile:water constitutes more than 1. At stage (ii) a flow P, containing, at least, 95 wt % of C3, of the total weight of the flow P, is added to S1, obtaining a mixed flow S2, with C3 representing propylene or propylene, mixed with propane with the minimal weight ratio propylene:propane 7:3. At stage (iii) the flow S2 is subjected to an impact of temperature, at most, 92C and pressure, at least, 10 bars, obtaining the first liquid phase L1, consisting, in fact, of C3, acetonitrile and water, and the second liquid phase L2, consisting, in fact, of water and acetonitrile, where the weight ratio acetonitrile:water in L2 constitutes less than 1. At stage (iv) the liquid phase L1 is separated from the liquid phase L2. The method makes it possible to separate acetonitrile from water effectively and recirculate the separated acetonitrile into the process of propylene epoxidation.

EFFECT: invention relates to the highly integrated method of obtaining propylene oxide.

28 cl, 11 tbl, 4 ex

FIELD: machine building.

SUBSTANCE: proposed process comprises gravity separation with upward discharge of fractions rich in light components and downward discharge of heavy components. Note here that buffer set is introduced in separation vessel to decelerate the fluid inlet flow. Then, it is distributed uniformly over the separation vessel width. Then, thin-layer settler is introduced to intensify the separation into upper and lower plies of said light and heavy fluid fractions by settling in thin ply. To optimise hydrophobic separation of hydrocarbons and hydrophilic separation of water, interface between said light and heavy fractions are adjusted by appropriate adjusting device that varies heavy fraction discharge level subject to light fraction density-to-heavy fraction density ratio. Separation is executed at light fraction ply height making 0.3-0.5 of the separation vessel entire height. For discharge of mechanical impurities, device bottom is either pyramid-shaped for removal of said impurities by pump or boxes their collection and removal are fitted on the device flat bottom. In compliance with the first version, this device comprises gravity separator and separated product discharge assembly. Note here that separation vessel accommodates extra buffer vessel with slitted hole over the device entire width to allow fluid to flow therefrom and extra thin-ply settler composed of one or several sequential modules composed by V- or W-like plates. Discharge assembly comprises moving trough to vary heavy fraction separation height and different-height spacers to this end. For discharge of mechanical impurities, device bottom is shaped to pyramid to support the set of atomisers for wash-out of said impurities. In compliance with second version, separation vessel accommodates the system of staggered webs elevated by 150-200 mm above said bottom. Discharge assembly comprises moving trough to vary heavy fraction separation height and different-height spacers to this end. For discharge of mechanical impurities, separation vessel bottom is flat with hatches arranged sat its ends.

EFFECT: higher efficiency of separation.

4 cl, 1 ex, 7 dwg

FIELD: machine building.

SUBSTANCE: invention refers to an industrial robot and a system to clean the lubricant of its gear box. The industrial robot comprises an engine and a gear box with the lubricant. The gear box is equipped by an integrated moisture absorbing unit containing the moisture absorbing substance. The invention is also referred to the method for the prevention of lubricant damage due to the moisture absorption inside the industrial robot used in high humidity environment.

EFFECT: longer service life of a device.

18 cl, 6 dwg

FIELD: chemistry.

SUBSTANCE: invention can be used in the chemical industry. A method of separation of melted sulphur from a flowing medium includes isolation of a liquid mixture, which contains a redox solution and melted sulphur into a reservoir, which has an upper part, a lower part, a zone of a gaseous phase, a zone of the redox solution and a zone of melted sulphur. Melted sulphur subsides in the reservoir and forms a separating boundary between the zone of the redox solution and the zone of melted sulphur at some height of the reservoir. Control of pressure in the reservoir is performed and gas is added or discharged from the zone of the gaseous phase, located immediately above the zone of the redox solution in the reservoir. Pressure inside the reservoir is supported irrespective of the height of the phase separation boundary. Gas is added through a valve of gas supply and discharged through a valve of gas output. Control over the valves is performed by means of a controller. Melted sulphur is discharged from the reservoir and a level of the boundary of the phase separation is measured by means of a device for control of the boundary of the phase separation depending on intensity of the melted sulphur output from the reservoir.

EFFECT: invention makes it possible to increase quality of separated sulphur, prevent its carryover.

9 cl, 4 dwg

FIELD: petroleum processing.

SUBSTANCE: object of invention is dehydration of petroleum at petroleum refineries. Apparatus comprises at least two packets disposed close to each other, which are mounted so that outlet surface of one packet is inclined toward that of the other and the two packets are faced to each other with their lowered ends covered by impermeable plates. The latter are joined with each other to form a pocket for collection and drainage of water coming from demulsification in the space of coalescing packets.

EFFECT: increased operation productivity and efficiency.

25 cl, 8 dwg

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