Submersible inhibitor reagent metering device

Abstract

The utility model relates to the field of devices for protecting downhole pumping equipment in production and injection wells and oilfield surface equipment against the deposition of scale, asphaltenes, resins and paraffins, the formation of high-viscosity emulsions, and corrosion. The present device comprises lower discs and upper discs which are detachably interconnected by bracing elements. The lower and upper discs are configured in the form of metering discs and a bracing disc. Arranged between the lower discs and between the upper discs are replaceable sealing gaskets. The lower discs, the upper discs and the sealing gaskets contain a perforation in which a replaceable filter element is disposed. The technical result is an increase in the service life of a metering device.

Description

[0001]SUBMERSIBLE REAGENT-INHIBITOR DOSER DESCRIPTION Technical field to which the utility model relates The utility model relates to the field of devices for protecting downhole pumping equipment (DPE) of production and injection wells and surface oilfield equipment (SOE) from operational complications such as the formation of salt deposits, deposits of asphalt, resin, and paraffin substances, the formation of highly viscous emulsions in the produced liquid and corrosion on DPE and SOE using chemicals, in particular to submersible reagent (inhibitor) dosers (E21B37 / 00, E21B37 / 06). State of the art A SUBMERSIBLE CONTAINER is known from the prior art, RU 198809U1, publ. 07 / 29 / 2020, characterized in that the submersible container contains a lower and upper disk, having a section with an external thread, detachably connected to each other through a fastening element by means of a threaded connection and a fiberglass body enclosed between the lower and upper disk with dosingholes. The disadvantage of the analogue is that in this device the role of the thrust element is performed by a fiberglass housing having holes, and when immersed in a well, the container experiences significant vertical loads, thus, with repeated use of the container, premature failure of the housing may occur due to the presence of weakening points of the structure in the form of holes in the housing. Also, fiberglass is a fibrous material and the creation of holes can lead to the destruction and delamination of the fibers and uneven distribution of the vertical load, which also leads to premature failure of the housing. Also known from the prior art is a SUBMERSIBLE WELL CONTAINER FOR FEEDING A REAGENT INTO A WELL, RU 197769U1, published 05 / 28 / 2020, characterized in that the submersible well container for feeding a solid reagent, mainly in granular or tablet form into a well, includes connected to each other by means of a couplingconnections of sections, each of which consists of a tubular body and a dispenser with a reagent placed inside it and not secured thereto, installed in the body with the formation of a gap between its outer walls and the inner surface of the body, wherein the dispenser is made with both blind ends and is perforated in the radial direction; the lower part of the section body is provided with a fixing bolt that prevents the dispenser from falling out of the body when the section is arranged vertically, while simultaneously excluding its influence on the free movement of the dispenser inside the body under the action of the movement of formation fluid or with different spatial arrangement of the body; wherein the lower end of the lower section of the container is provided with a lower disk with perforations, characterized in that the section body is made perforated, and the section body in the upper part, above the perforations of the body, is additionally provided with a fixing bolt fixed in the wall of the body, wherein the distance between the fixingThe bolts in the housing exceed the length of the dispenser. A disadvantage of this alternative is that it allows for free movement of the dispenser within a limited section, leading to collisions between the section housing and the container during insertion and extraction, as well as during formation fluid movement. Constant collisions lead to increased wear on the dispenser and premature failure. As a prototype, the applicant considers a DEVICE FOR FEEDING A REAGENT INTO A WELL, RU 2472922 C1, published on 20.01.2013, characterized in that the device for feeding a reagent into a well, containing cylindrical containers with a reagent connected at the ends by means of couplings, mixing chambers with openings and dosing filters, distinguished in that the upper ends of the cylindrical containers are covered by a perforated disk with a filter element, and the lower ones by a non-perforated disk, while the couplings have at least one row of inlet and outlet openings. A disadvantage of the prototype is that,The dosing holes are located on the side walls of the device, which leads to the fact that when immersing or removing the container, as well as when the formation fluid moves, the load is completely absorbed by the end caps, which transfer it through the housing to the supporting element made in the form of a threaded coupling, due to which the threaded connection is subject to wear and premature failure. Disclosure of the essence of the utility model The technical problem, which the claimed utility model is aimed at solving, is the elimination of the deficiencies of the prototype. The claimed utility model is a submersible reagent (inhibitor) dispenser, comprising lower and upper disks, detachably connected to each other through thrust elements, wherein the lower and upper disks contain perforations in which a replaceable filter element is installed, and between the lower and upper disks there are replaceable sealing gaskets. In a particular case, the submersible reagent (inhibitor) dispenser is made withthe ability to dose solid and liquid reagents. In this particular case, the lower and upper disks are made of sheet metal. In this particular case, the lower and upper disks are made of synthetic material. In this particular case, the thrust elements are made in the form of bushings. In this particular case, the thrust elements are made in the form of plates. In this particular case, the thrust elements are made of metal. In this particular case, the perforation cross-section is determined based on the properties of the inhibitor and the operating parameters of the well or NNO. In this particular case, the filter element is made of a filter material. In this particular case, the sealing gasket is made of a moisture-resistant, oil-resistant, heat-resistant material. This utility model provides a solution to the specified technical problem and ensures a technical result consisting in increasing the service life of the reagent (inhibitor) dispenser. According to GOST 27.002-2015 "Reliability in Engineering. Terms and Definitions": The service life is the total operating timeobject from the beginning of its operation or its resumption after repair until the moment of reaching the limit state. The limit state of a part is the state in which it ceases to meet the operational requirements, receives unacceptable deformation and cannot be repaired and requires complete replacement. Brief description of the drawings Fig. 1. General view of the device for feeding the reagent into the well containing the declared submersible reagent (inhibitor) dispensers. Fig. 2. Submersible reagent (inhibitor) dispenser with thrust plates and two filter elements. Fig. 3. Submersible reagent (inhibitor) dispenser with thrust bushings and a single upper thrust disk. The following is indicated in the figures: 1 - body; 2 - coupling sleeve; 3 - thread; 4 - dispenser; 5 - fixing bolts; 6 - metering holes; 7 - space for placing the reagent (inhibitor); 8 - lower metering disk; 9 - tightening bolts; 10 - upper metering disk; 11 – sealing gasket; 12 –filter element; 13 - lower thrust disk; 14 - upper thrust disk; 15 - thrust plates; 16 - thrust bushings; 17 - dispenser chamber; 18 - nuts. The submersible reagent (inhibitor) dispenser 4 is a part of the device for feeding the reagent into the well (Fig. 1) or the intra-tube space of the NNO, including the body 1 of the cylindrical container made in the form of a section of the pump-compressor pipe at both ends of which a coupling 2 is mounted on a thread 3 or a sealed metal plug (not shown in the figures). One or more dosing devices 4 are mounted in the housing 1 and secured from displacement by means of bolts 5 mounted in the dosing holes 6. A liquid or solid reagent (inhibitor) is located in the space for placing the reagent (inhibitor) 7, formed by the dosing devices 4 (or the dosing device and the plug) and the walls of the housing 1. The dosing device 4 serves to dose the reagent (inhibitor) contained in the housing 1 into the well in order to protect the equipment fromthe formation of salt deposits, deposits of asphalt, resin and paraffin substances, the formation of highly viscous emulsions in the produced liquid and corrosion on the GNO and NNO. The doser 4 contains several lower disks, including a lower metering disk 8 containing four square openings along the perimeter for tightening bolts 9 with square heads, an upper metering disk 10, the holes for the bolts 9 in which are made round, sealing gaskets 11, filter elements 12 and a lower thrust disk 13. The lower disks, between which the sealing gaskets 11 are placed, are detachably connected to the upper thrust disk 14 by means of bolts 9 through thrust elements 16 or 17. Thrust elements are detachably mounted between the lower and upper disks (Fig. 2). The connection of the lower and upper disks through the thrust elements allows for the most secure tightening of the connection of the lower and upper disks without damaging the parts of the device and, accordingly, the most secure fixation of the dispenser 4 in the housing.1, due to which the movement of the dispenser 4 inside the housing 1 and, accordingly, abrasion of the sealing gaskets 11 and collisions of the dispenser 4 and the housing 1 are absent, which in turn protects the device from premature failure and prolongs its service life. At the same time, a detachable connection allows for complete disassembly of the device and replacement of each of its parts, as well as cleaning the filter element if necessary, which generally extends the service life of the device and, accordingly, its service life. Sealing gaskets 11 are mounted between the lower disks. The lower disks, upper disks and sealing gaskets 11 have corresponding perforations in which filter elements 12 are mounted. Perforation is primarily performed in the form of a central hole. The cross-sectional area of ​​​​the perforation is selected based on the properties of the selected reagent (inhibitor) and the operating parameters of the well or NNO. Sealing gasket 11 allows for hermetically and securely fastening the dispenser 4 in the housing 1cylindrical container, which prevents it from moving inside the housing 1 and colliding with it, which prolongs the service life and, accordingly, the resource of the dispenser 4. Perforation can be performed by means of a plurality of holes randomly located on the plane of the disk, a plurality of holes the centers of which are located on concentric circles coaxial with the disk, or in any other way, provided that the total cross-sectional area of ​​​​the holes corresponds to the properties of the selected reagent (inhibitor). The alignment of the perforation holes and the corresponding disks prevents breakage of the disk under the perceived vertical load, which prolongs its service life and increases the resource of the dispenser 4 as a whole. Moreover, any of the described perforation options has the stated advantage. Sealing gasket 11 is made of a moisture-resistant, oil-resistant, heat-resistant elastic material and is designed to seal and fix the dispenser device in the housing 1, andAlso, the sealing of the filter element 12 installation in the dispenser. The sealing gasket 11 is made of rubbers, polymers, or composite materials, such as nitrile, butadiene-nitrile, ethylene-propylene, and fluororubbers, polyurethanes, polyamides, or fiber-reinforced or polyurethane-based rubbers. The described materials possess sufficient strength and at the same time meet the criteria of moisture resistance, oil resistance, heat resistance, and elasticity, which determines their wear resistance during operation in the well and, accordingly, increases the service life of the dispenser 4. The filter element 12 is made of woven or non-woven materials, such as polyester or polypropylene fabrics, stainless steel mesh (thread), felt, spunbond, or meltblown. Each of the described materials is chemically resistant and also allows for cleaning during the operation of the dispenser, which increases the service life and, accordingly, the service life of the dispenser 4.The possibility of replacing the sealing gasket 11 and the filter element 12 allows for continued operation of the dispenser 4 when these elements are critically worn out by replacing them, which extends the service life of the dispenser 4 and, accordingly, its resource. The lower and upper disks are made of sheet metal or synthetic material, for example, steel, stainless steel, titanium, nickel alloys, fiberglass, polyethylene, polypropylene, fluoroplastic or polyamide. The lower and upper disks are the same diameter. The thrust elements can be made in the form of plates 15 made of a metal sheet with a thickness of 2 - 4 mm or metal cylindrical bushings 16. The thrust elements form the skeleton of the dispenser chamber 17, the space of which is limited by the walls of the housing 1 and the thrust disks 13 and 14. The thrust elements are made, for example, of steel, stainless steel, titanium, nickel alloys. The described materials have sufficient static and dynamic strength, which protectsThe device is protected from premature failure. Bolts 9 are inserted into the square holes of the metering disk 8 and secured with nuts 18, tightening the structure of the dispenser 4. The thrust elements can be placed on bolts 9 or can be clamped by bolts 9 and nuts 18 and the upper and lower disks. Any of the described variants of detachable fastening of the thrust elements ensures their tight fit to the corresponding disks, uniform distribution of the adjacent load and protection from breakage, which in turn increases the service life of the dispenser 4. An embodiment of the utility model is a dispenser 4 including lower disks detachably connected to a single upper thrust disk 14 (Fig. 3). The single upper disk 14 eliminates the need for an additional thrust gasket 11 for installation between the upper disks. The elimination of a wearing element can reduce the overall number of component replacements and the wear that occurs thereby, which can generally increase the service life of the dispenser 4.An embodiment of the utility model is a dispenser 4 including lower disks detachably connected to three or more upper disks mounted through sealing gaskets 11 between them. A greater number of upper disks allows for the installation of a greater number of sealing gaskets 11, which in turn can increase the strength of fastening of the dispensers 4 and, accordingly, can increase the service life of the dispenser 4. The reagent (inhibitor) dispenser 4 is used as follows. The reagent (inhibitor) dispenser 4 is assembled by installing the lower dosing disk 8 on the bolts 9 so that the square heads of the bolts 9 are in the corresponding square holes of the lower dosing disk 8, after which the sealing gasket 11 with the filter element 12 is installed on top, covered with the upper dosing disk 10, then the next sealing gasket 11 and the upper dosing disk 10 are installed and this installation operation is repeated for eachthe existing pair of sealing gasket 11 and upper metering disk 10, after which lower thrust disk 13 is installed. After this, thrust element in the form of thrust plate 15 or thrust sleeve 16 is installed. Then, upper thrust disk 14 and sealing gasket 11, upper metering disk 10 are mounted on bolts 9 and this operation is repeated for each pair of sealing gasket 11 and upper metering disk 10. Then, sealing gasket 11 with filter element 12 and upper metering disk 10 are installed, after this, nuts 18 are screwed onto bolts 9. Assembled dispenser 4 is mounted in housing 1 so that it divides space 7 filled with reagent into 2 parts, and chamber 17 of dispenser 4 is located opposite metering holes 6 and is connected through them with the annular space of the well or the intra-tube space of the NNO. After installing the dispenser 4 into the housing 1, 1 or 2 fixing bolts 5 are screwed into the dosing holes 6. After this, they are tightenednuts 18 on bolts 9. Space 7 on both sides of dispenser 4 is filled with a reagent (inhibitor). In case of using a single upper disk, after installing the thrust elements, the upper thrust disk 14 is mounted and nuts 9 are screwed onto bolts 18. Then, in the manner described above, dispenser 4 is mounted into housing 1. Thus, the technical result of the claimed utility model, consisting in increasing the service life of the submersible dispenser of reagent (inhibitor) 4, is achieved due to the fact that the presence of thrust elements makes it possible to increase the strength of the device and evenly distribute the load on the supporting elements of the structure, which increases the operating time of the device before critical damage and, accordingly, increases its service life. At the same time, a detachable connection of disks with thrust elements allows for the replacement of each element of the device, which extends its service life and increases the service life. Sealing gaskets 11 allow the dispenser to be securely fixed inside housing 1 and prevent its movementand wear from interaction with housing 1, which in turn extends the life of the device. The replaceable filter element 12 allows for both its replacement and disassembly and cleaning, extending the life of each individual element and the device as a whole.

Claims

UTILITY MODEL CLAUSE 1. An immersion dispenser for a reagent-inhibitor, comprising lower and upper disks detachably connected to each other through thrust elements, the lower and upper disks are made in the form of metering disks and a thrust disk, between the lower disks and between the upper disks there are replaceable sealing gaskets, the lower disks, upper disks and sealing gaskets contain perforations in which a replaceable filter element is installed.

2. An immersion dispenser for a reagent-inhibitor according to claim 1, characterized in that it is designed with the possibility of dosing a solid and a liquid reagent.

3. An immersion dispenser for a reagent-inhibitor according to claim 1, characterized in that the lower and upper disks are made of sheet metal.

4. An immersion dispenser for a reagent-inhibitor according to claim 1, characterized in that the lower and upper disks are made of a synthetic material.

5. An immersion dispenser for a reagent-inhibitor according to claim 1, characterized in that the stop elements are made in the form of bushings. 6.The immersion dispenser of the reagent-inhibitor according to claim 1, characterized in that the stop elements are made in the form of plates.

7. The immersion dispenser of the reagent-inhibitor according to claim 1, characterized in that the stop elements are made of metal.

8. The immersion dispenser of the reagent-inhibitor according to claim 1, characterized in that the filter element is made of a filter material.

9. The immersion dispenser of the reagent-inhibitor according to claim 1, characterized in that the sealing gasket is made of a moisture-resistant, oil-resistant, heat-resistant material.

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