RU156132U1 - CENTRIFUGAL SEPARATOR FILTER - Google Patents

Abstract

1. A centrifugal separator filter comprising a vertical housing (1) having a central portion of a substantially cylindrical shape and a top and bottom portion of a substantially hemispherical shape, a tangential inlet (2) of a fluid containing oil and particles to be filtered, located in the upper part of the casing (1), an axial tube (3) with a filtered fluid outlet (4) having a concentric arrangement with the casing (1) and fixed in its upper part, a plurality of conical plates (5) located around the axial pipe (3 ) friend n two, the base of the conical plates (5) pointing downward relative to the position of the housing (1), the outlet (6) of particles removed from the fluid located in the lower part of the housing (1), while the axial tube (3) is continuous, and the lower end located in the housing (1) below the base of the lowest of the many conical plates (5), but above the outlet (6) of the particles removed from the fluid, a perforated plug (7) is attached, while the conical plates (5) are made with bases different diameter, and the diameter of the base of the conical n the plate (5) increases in the direction from the tangential inlet (2) to the outlet (6) of particles removed from the fluid. 2. The filter according to claim 1, wherein the increase in the diameter of the base of the cone plates is uniform. 3. The filter according to claim 1, wherein the increase in the diameter of the base of the cone plates is uneven. The filter according to claim 1, providing a flow rate of 60 m / h. 5. The filter according to claim 1, wherein the tangential inlet passage diameter is 125 mm and the axial tube outlet diameter is 125 mm. The filter according to claim 1, in which the outer diameter t

Description

FIELD OF TECHNOLOGY TO WHICH A USEFUL MODEL IS

This utility model relates to the operation of booster pumping stations in oil fields, namely to improved centrifugal separator filters, booster pumping stations with such filters and methods of operating such stations.

BACKGROUND

As a rule, booster pumping stations (BPS) are used in remote oil fields. The need for the use of BPS is due to the fact that often in such fields the energy of the oil and gas formation is not enough to transport the oil and gas mixture before installing a preliminary discharge of water, designed to separate the produced water from the oil and the associated basin, as well as heating the oil and increasing the specific energy of the flow of produced oil to the next system oil preparation.

BPS equipment, primarily pumps, provides oil with the additional pressure necessary for transportation in the direction of high-pressure sections through collection and preparation systems. Booster pumping stations also perform the functions of separating oil from intrinsic particles, mechanical impurities, sludge, fine crystalline suspension, corrosion products and other solid particles that break out from the formation and near the bottomhole zone, which are extracted by the stream to the wellhead and enter the oil and gas collection system, creating serious problems there.

The most important factor in the effective operation of pumps on the pumping station is the quality of well production. This is all the more important because the cost of the equipment used (its overhaul, maintenance) is very high. In connection with the removal from the reservoir of a large number of different particles on the gratings of the previously used filters, traffic jams appeared that adversely affect the further movement of the fluid. With an increase in the size of the openings in the filter grate, clogging of the working elements of the DNS pump occurred with subsequent failure. Otherwise, there was an increase in working pressure at the filter intake and a non-categorical failure (breakthrough) of the pipeline.

Due to the aforementioned reasons, various filter separators are widely used, the operation of which is based on the centrifugal principle, when the fluid to be cleaned is fed into a cylindrical or cone-shaped body, and due to the different density of polluting particles and the fluid, they separate under the action of centrifugal forces.

Hack, a centrifugal filter separator is known (RU 129414, publ. 06/27/2013, IPC B01D 45/12, B04C 5/00), characterized in that it includes a vertical cylindrical body with a top cover and a lower conical bottom forming the inner cavity of the filter -separator, the line of tangential input of the cleaned fluid into the internal cavity connected to the housing near the top cover; outlet pipes for purified liquid and sediment; a central outlet pipe with a bottom end closed by a cap, placed in the center coaxially with the body, passing through the top cover and having openings adjacent to the plug in the lower part of the pipe wall, characterized in that it is additionally equipped with upper and lower cylindrical inserts coaxial with the body, moreover, the lower insert has a diameter greater than the upper; the upper insert is located below the tangential inlet of the liquid being cleaned and forms an inner annular gap with the central outlet pipe, and an outer annular gap with the body wall; the upper cylindrical insert is connected to the housing by a continuous annular diaphragm located between the upper and lower ends of this insert; An annular sludge receiver is installed outside the casing adjacent to it at the level of the diaphragm; it is communicated with openings with the internal cavity of the casing above the diaphragm and has at least one pipe for sediment discharge; the upper end of the lower cylindrical insert is located in the outer annular gap below the diaphragm, and its lower end is placed below the lower end of the upper cylindrical insert and connected to the large base of the additional insert in the form of a truncated cone, the smaller base of which is connected to the plug of the central outlet pipe; the lower conical bottom is equipped with a outlet pipe for the purified liquid.

A disadvantage of the known filter separator is the insufficient filtration ability of the device, because the removed particles are discharged along the central outlet pipe in the direction from the bottom end closed by the plug to the upper cover, while the cleaned fluid is discharged through the inner annular gap located upstream of the fluid from the bottom end of the central outlet coarse, which means that not all particles enter central outlet pipe.

Also known in the prior art are centrifugal gas-liquid separator filters described in patents RU 2290252 (publ. 12/27/2006, IPC B01D 45/12), RU 2290984 (publ. 10.01.2007, IPC B01D 45/12), RU 2295999 (publ. 03/27/2007, IPC B01D 45/12), the first of which is selected as the closest analogue for the inventive centrifugal separator filter.

A common disadvantage of the known centrifugal separator filters is the lack of filtration ability of the device, because the differences in the characteristics of the particles to be separated are not taken into account, and in particular the fact that lighter in mass and smaller in transverse size particles cannot be filtered sufficiently efficiently and, therefore, can enter the filter outlet with a common fluid flow. Moreover, the axial tube of the filter selected as a prototype is made in the form of a set of perforated nozzles, the lower part of which is telescopically inserted into the upper part of another perforated nozzle with the possibility of limited expansion. So, during the operation of the filter, it is possible to change its filtering ability due to the movement of the perforated nozzles relative to each other, which can negatively affect the filter’s ability to pass particles of one size and retain particles of another size. In addition, with a sudden change in the position of the perforated nozzle, the stability of the fluid flow may be impaired, and in the event of a stall, local swirls may occur that impede proper particle filtration.

ESSENCE OF A USEFUL MODEL

To solve the problem of overcoming the above problems, namely, to ensure a stable fluid flow, which allows filtering particles of different sizes with equal efficiency, the authors in one aspect of the utility model proposed a centrifugal separator filter containing:

a vertical casing having a central portion of a substantially cylindrical shape and upper and lower portions of a substantially hemispherical shape,

tangential fluid inlet containing oil and particles to be filtered, located in the upper part of the housing,

an axial pipe with the release of filtered fluid having a concentric arrangement with the body and fixed in its upper part,

a plurality of cone plates arranged around the axial tube one above the other, the base of the cone plates pointing downward relative to the position of the housing,

the release of particles removed from the fluid located in the lower part of the housing, while

the axial tube is made continuous, and a perforated plug is attached to its lower end, located in the housing below the base of the lowest of the many conical plates, but above the outlet of the particles removed from the fluid, the conical plates are made with bases of various diameters, and the diameter of the conical base plates increases in the direction from the tangential inlet to the release of particles removed from the fluid.

In an additional aspect of the utility model, a centrifugal separator filter is provided comprising:

a vertical casing having a central portion of a substantially cylindrical shape and upper and lower portions of a substantially hemispherical shape,

tangential fluid inlet containing oil and particles to be filtered, located in the upper part of the housing,

an axial pipe with the release of filtered fluid having a concentric arrangement with the body and fixed in its upper part,

a plurality of cone plates arranged around the axial tube one above the other, the base of the cone plates pointing downward relative to the position of the housing,

the release of particles removed from the fluid located in the lower part of the housing, while

the axial tube is continuous, and a perforated plug is attached to its lower end, located in the housing below the base of the lowest of the many conical plates, but above the outlet of the particles removed from the fluid, and the conical plates are fixed to the axial pipe in a fixed position relative to each other .

In one embodiment, a filter is proposed in which the increase in the diameter of the base of the cone plates is uniform.

In one embodiment, a filter is proposed in which the increase in the diameter of the base of the cone plates is uneven.

In one embodiment, a filter is provided in which the cone plates are fixed to the axial tube by welding.

In one embodiment, a filter is proposed in which the cone plates are integral with the axial tube.

In one embodiment, a filter is provided that provides a fluid flow rate of 60 m ³ / h.

In one embodiment, a filter is proposed in which the tangential inlet passage diameter is 125 mm and the axial tube outlet diameter is 125 mm.

In one embodiment, a filter is provided in which the outer diameter of the tangential inlet is 138 mm. and the axle tube outlet diameter is 138 mm.

In one embodiment, a filter is proposed in which the outer diameter of the vertical housing is 377 mm.

In one embodiment, a filter is provided that provides filtering of particles whose transverse size is 5 μm or more.

In one embodiment, a filter is provided that provides filtering of particles with an efficiency that is from 70% to 90%.

In one embodiment, a filter is provided that provides a solids content at the outlet of the filtered fluid of not more than 0.2% of the mass of the fluid.

Thus, the proposed filter options provide increased filtering ability, in the first aspect of the utility model, due to the fact that the filter characteristics are constant in terms of separation of particles of various sizes from the fluid, and the filtration of both small and large particles is guaranteed to be conical the plates are made with bases of different diameters, and the diameter of the base of the cone plates increases in the direction from the tangential inlet to the release of particles removed from the fluid, and in Another aspect of the utility model is that the conical plates are fixed to the axial tube in a fixed position relative to each other, which guarantees the stability of the fluid flow and the absence of stalls.

In one additional aspect of the utility model, a booster pump station is proposed comprising a buffer tank, a unit for collecting and pumping oil leaks, a filter, a reservoir for removed particles, a pump unit and a plurality of candles for emergency discharge of the basin, the filter being a centrifugal separator filter made in consistent with previous aspects of the utility model.

It should be understood that the proposed booster pump station also provides a stable fluid flow, which allows with equal efficiency to filter particles of different sizes contained in the fluid entering the buffer capacity of the booster pump station. This means that the reliability of the booster pump station is improved, the service interval of the centrifugal separator filter is increased, and, as a result, the interval between overhauls of the booster pump station is increased.

BRIEF DESCRIPTION OF THE DRAWINGS

Next, the most preferred embodiments of the utility model will be described in more detail with reference to the drawings, in which:

in FIG. 1 shows a cross section of a centrifugal separator filter in one aspect of the utility model,

in FIG. 2 shows a section but line AA in FIG. one.

DESCRIPTION OF PREFERRED EMBODIMENTS FOR USING THE USEFUL MODEL

The following description relates to the operation of booster pumping stations in oil fields, namely to improved centrifugal separator filters, booster pumping stations with such filters and methods of operating such stations.

As a rule, booster pumping stations (BPS) are used in remote oil fields. The need for the use of BPS is due to the fact that often in such fields the energy of the oil and gas reservoir for transporting the oil and gas mixture to a preliminary water discharge unit designed to separate formation water and associated gas from the oil, as well as to heat the oil and increase the specific energy of the produced oil stream to the next treatment system oil is not enough.

BPS equipment, primarily pumps, provides oil with the additional pressure necessary for their transportation in the direction of high-pressure sections through collection and preparation systems. Booster pumping stations also perform the functions of separating oil from intrinsic particles, mechanical impurities, sludge, fine crystalline suspension, corrosion products and other solid particles that break out from the formation and near the bottomhole zone, which are extracted by the stream to the wellhead and enter the oil and gas collection system. creating serious problems there.

In FIG. 1 shows a cross section of the proposed centrifugal separator filter in a first aspect of the utility model, and FIG. 2 shows a section along line AA in FIG. 1. The filter of FIG. 1 is a centrifugal separator filter comprising a vertical housing 1 having a central portion of a substantially cylindrical shape and an upper and lower portion of a substantially hemispherical shape, a tangential fluid inlet 2 containing oil and particles to be filtered, located in the upper portion of the housing 1, an axial tube 3 with an outlet 4 of filtered fluid having a concentric arrangement with the housing 1 and fixed in its upper part, a plurality of conical plates 5 located around the axial tube s 3 under each other, with the base of the conical plates 5 pointing downward relative to the position of the housing 1, the outlet 6 of particles removed from the fluid located in the lower part of the housing 1, while the axial tube 3 is continuous, and to its lower end located in the housing 1 below the base of the lowest of the many cone plates 5, but above the outlet 6 of particles removed from the fluid, a perforated plug 7 is attached, while the cone plates 5 are made with bases of different diameters, and the diameter of the base of the cone plates Astin 5 increases in the direction from the tangential inlet 2 for production fluid 6 remote from the particulate media.

In a second aspect of the utility model, a centrifugal separator filter is proposed (not additionally shown in the drawings, with the same elements having the same reference position when referring to Fig. 1), a vertical housing 1. having a central part of a substantially cylindrical shape and upper and lower parts of a substantially hemispherical shape, tangential inlet 2 of a fluid containing oil and particles to be filtered, located in the upper part of the housing 1, an axial tube 3 with the release of 4 filtered fluid having a An centric arrangement with the housing 1 and fixed in its upper part, a plurality of conical plates 5 located around the axial pipe 3 one above the other, the base of the conical plates 5 pointing downward relative to the position of the housing 1, outlet 6 of particles removed from the fluid located in the lower part housing 1, while the axial tube 3 is continuous, and to its lower end located in the housing 1 below the base of the lowest of the many conical plates 5, but above the outlet 6 of particles removed from the fluid, is attached perforated plug 7, while the conical plate 5 is fixed on the axial tube 3 in a fixed position relative to each other.

The action of the filter is based on the separation of fine-crystalline suspension and particles of a flowing fluid with different densities, as a result of the action of centrifugal force on solid particles during tangential flow inlet at high speed with radial acceleration inside the body.

Centrifugal separation occurs inside the housing 1, and in comparison with the prototype in the proposed filter according to the first aspect of the utility model, increased filtration capacity is ensured due to the fact that the filter characteristics are constant in terms of separation of particles of various sizes from the fluid, and filtration of both small and large particles is guaranteed that the conical plates 5 are made with bases of different diameters, and the diameter of the base of the conical plates 5 increases in the direction from the tang cially inlet 2 for production fluid 6 remote from the particulate media.

It should be borne in mind that in some embodiments, the increase in the diameter of the base of the conical plates 5 may be uniform, and in others uneven. With a uniform increase in the diameter of the cone plates 5, the increase in the diameter of the cone plates 5 in the direction from the tangential inlet 2 to the outlet 6 of particles removed from the fluid occurs with the same step. The increment may be arbitrary, for example, amounting to 5% of the diameter of the base of the conical plate 5. With an uneven increase in the diameter of the conical plates 5, the diameter of the conical 5 plates increases in the direction from the tangential inlet 2 to the outlet 6 of the particles removed from the fluid with a variable step . In any case, with an increase in the diameter of the conical plates 5, particles of a smaller transverse size will separate from the fluid stream with greater efficiency.

The filter can be made of any available material that can withstand the pressure of the fluid to be filtered up to 1.6 MPa, preferably of light and sufficiently strong metals, such as stainless steel.

It should be borne in mind that in the proposed filter according to the second aspect of the utility model, in comparison with the prototype, an increased filtration capacity is also provided due to the fact that the conical plates 5 are fixed on the axial tube 3 in a fixed position relative to each other, which guarantees the stability of the fluid flow and lack of stalls. In various embodiments, the cone plates 5 may be secured to the axial tube 3 by welding, or they may be integral with the axial tube 3 by known stamping, casting and other metal processing methods.

Continuing further on the overall operation of the filter in both aspects, the cleaned fluid is discharged through an axial pipe 3, at the inlet end of which a perforated plug 7 is installed for introducing the cleaned fluid. Contaminants, sludge and other particles to be filtered, as a result, settle and accumulate in the lower part of the filter housing 1, from where they can be regularly or cyclically removed by maintenance personnel by releasing 6 particles removed from the fluid. Also in this case, the perforated plug 7 serves as an additional filtration element, because ensures the pre-filtering of particles that can be picked up by the flow of fluid from the bottom of the lower part of the filter housing 1. In one embodiment, the outlet 6 of the particles removed from the fluid can be connected to the reservoir for the removed particles of the booster pump station, while the outlet 4 is fluidly connected to the pump unit of this station.

The filter is mounted by flange connections (not shown) onto existing transfer lines. Obvious is the installation of various taps and valves at the inlet and outlet of the filter to shut off the fluid flow, for example, in case of need for repair and other maintenance work. One of the options for using the proposed filter is its operation as part of a booster pump station containing a pump unit. It can be based on a centrifugal pump sectional (CNS) type CNS-60, i.e. having a fluid flow rate of 60 m ³ / h

In such an embodiment of the present utility model, it is preferable to implement a filter providing a fluid flow rate of 60 m ³ / h. Then, in order to ensure the indicated flow rate and for the convenience of installation, the proposed filter can be made so that the diameter of the tangential inlet passage is 125 mm and / or the diameter of the axial pipe outlet is 125 mm and / or the outer diameter of the tangential inlet is 138 mm and / or the outer diameter of the axial pipe outlet is 138 mm. In general, in such an embodiment, the outer diameter of the vertical housing will be 377 mm, and the total height (together with the outlet 4 of the filtered fluid and the outlet 6 for the removed particles) of the filter will be 1,450 mm.

The reliability of booster pumping stations, and in particular the pumps used, like any machines and mechanisms, is determined by a number of factors. Firstly, it depends on the perfection of the design and, accordingly, the completeness of its adaptation to the operating conditions of the machines. Secondly, it is determined by the quality of factory manufacturing. And finally, it depends on the operating conditions of the pumps and on the characteristics of the transported fluid. It should be noted that typically centrifugal pumps are designed to pump oil products uncontaminated by mechanical impurities and water with oil impurities.

Therefore, in order to guarantee long service life of booster pumping station pumps and to increase the overhaul intervals in one of the options, the filter should provide filtering of particles whose transverse size is 5 μm or more, thereby guaranteeing filtering of particles whose transverse size exceeds 0.2 mm, which required for proper operation of the pump type CNS-60. Preferably, particle filtering should be provided with an efficiency that is between 70% and 90%. This ultimately can provide a solids content at the outlet 4 of the filtered fluid is not more than 0.2% of the mass of the fluid.

As already mentioned, it is typical to use centrifugal separator filters at booster pump stations, in particular at a booster pump station containing a buffer tank, a unit for collecting and pumping out oil leaks, a filter, a reservoir for removed particles, a pump unit and many candles for emergency gas discharge, and the filter is a centrifugal separator filter, made in accordance with the previous aspects of this utility model.

A method of operating such a booster pump station includes the steps of:

receive a fluid containing oil and particles to be filtered into a buffer tank,

supplying fluid to the filter by means of connecting pipes,

filtering the fluid to separate particles to be filtered from oil,

accumulate oil-filtered particles in the reservoir for the removed particles,

pressurize the pump unit for subsequent transportation of a fluid containing oil, purified from particles to be filtered,

supplying a fluid medium containing oil purified from particles to be filtered into a transportation network or a network of oil trunk pipelines.

It should be understood that the step of filtering the fluid is carried out by means of a centrifugal separator filter according to aspects of the present utility model. In addition, the method may further include the stage of accumulating fluid in the unit for collecting and pumping oil leaks in the event of an oil leak, and may also further include relieving the excess pressure of the fluid through a plurality of emergency release candles gas known in the art.

In the proposed booster pump station and the method of its operation, a stable fluid flow is also provided, which allows filtering particles of different sizes contained in the fluid entering the buffer capacity of the booster pump station with equal efficiency. This means that the reliability of the booster pump station is improved, the service interval of the centrifugal separator filter is increased, and, as a result, the interval between overhauls of the booster pump station is increased.

It should be understood that the structures and methods disclosed in the materials of the present description are exemplary in nature, and that these specific embodiments should not be construed in a limiting sense, since numerous variations are possible. The subject of this description includes all the latest and not obvious combinations and subcombinations of various systems and methods, and other features, functions and / or properties disclosed in the materials of the present description. The following utility model formula details some combinations and subcombinations. regarded as new and unobvious.

Claims (10)

1. Centrifugal separator filter containing a vertical housing (1) having a central part of a substantially cylindrical shape and upper and lower parts of a substantially hemispherical shape, tangential inlet (2) of a fluid containing oil and particles to be filtered, located in the upper part of the housing (1), an axial tube (3) with a filtered fluid outlet (4) having a concentric arrangement with the body (1) and fixed in its upper part, a plurality of cone plates (5) located around the axial tube (3) under each other, the base of the cone plates (5) pointing downward relative to the position of the housing (1), the release (6) of particles removed from the fluid located in the lower part of the housing (1), while the axial tube (3) is continuous, and a perforated plug (7) is attached to its lower end located in the housing (1) below the base of the lowest of the many conical plates (5), but above the outlet (6) of the particles removed from the fluid moreover, the cone plates (5) are made with bases of different diameters, and the diameter of the base of the cone plates (5) increases in the direction from the tangential inlet (2) to the outlet (6) of particles removed from the fluid. 2. The filter according to claim 1, in which the increase in the diameter of the base of the conical plates is uniform. 3. The filter according to claim 1, in which the increase in the diameter of the base of the conical plates is uneven. 4. The filter according to claim 1, providing a flow rate of a fluid equal to 60 m ³ / h. 5. The filter according to claim 1, in which the diameter of the tangential inlet passage is 125 mm, and the diameter of the axial pipe outlet is 125 mm. 6. The filter according to claim 1, in which the outer diameter of the tangential inlet is 138 mm, and the diameter of the outlet of the axial pipe is 138 mm. 7. The filter according to claim 1, in which the outer diameter of the vertical housing is 377 mm 8. The filter according to claim 1, providing filtering of particles whose transverse size is 5 μm or more. 9. The filter according to claim 8, providing for the filtration of particles with an efficiency that is from 70% to 90%. 10. The filter according to claim 8 or 9, providing a solids content at the outlet of the filtered fluid is not more than 0.2% of the mass of the fluid.

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