RU205825U1 - Angle cage type control valve - Google Patents

Abstract

The utility model relates to shut-off and control devices designed to regulate the flow of a medium with a high content of abrasive inclusions (abrasive, proppant) of medium size. An angle cage-type control valve is proposed, including a body, inlet and outlet channels of the body, located at an angle of 90 °, a sleeve a cage installed at the intersection of the channels, a plunger installed in the cage bushing and made with the ability to close the channels, a cover with a hermetically placed drive in it, which moves the plunger. At the same time, a cavity is made in front of the cage sleeve, behind which a protective cage mesh is installed. The technical result is to increase the reliability and service life of the valve of the control angle cage type. 5 p.p. f-ly, 2 dwg

Description

The proposed utility model relates to shut-off and control devices designed to control the flow of a medium with a high content of abrasive inclusions (abrasive, proppant) of medium size.

Known RF patent No. 192418 dated 05/11/2016, which discloses an angular cage-type regulating valve, including a housing, inlet and outlet channels of the housing located at an angle of 90 °, a cage bushing installed at the intersection of the channels, a plunger installed in the cage bushing and made with the ability to close the channels, a cover with a stem with a scale placed in it and hermetically sealed in it and a steering wheel, by turning which the stem and the plunger connected to it are displaced.

The disadvantages of this valve are:

- rather short service life of the cage sleeve, in the presence of a large amount of abrasive components in the medium.

The technical result is to increase the reliability and service life of the valve of the control angle cage type.

The technical result is achieved by the fact that the control valve of the cage type includes a body, inlet and outlet channels of the body, located at an angle of 90 °, a cage bushing installed at the intersection of the channels, a plunger installed in the cage bushing and made with the ability to overlap the channels, a cover, with a hermetically sealed drive that moves the plunger. At the same time, a cavity is made in front of the cellular sleeve, behind which a protective cellular mesh is installed.

The openings of the cage protective mesh coincide or do not coincide with the openings of the cage sleeve.

The cellular protective mesh is made of carbide material: sintered silicon carbide SSiC, or silicon carbide with a reaction bond RBSiC, or silicon carbide on a nitride bond NBSiC, or hardened zirconium TZ, or silicon nitride SN, or tungsten carbide TC.

The cage protective mesh can be installed in the valve body or as part of a locking and regulating unit (cage sleeve and plunger).

The essence of the claimed technical solution is illustrated by Fig. 1-2, where

figure 1 shows a general sectional view of the proposed valve,

Figure 2 shows the deformation of the cellular protective mesh after the impact of a large particle.

In the figures, the following parts are referenced.

1 - plunger assembly,

2 - saddle,

3 - cellular sleeve,

4 - cellular protective mesh,

5 - perforated holes of the protective mesh cage,

6 - perforated holes of the main cage,

A - the cavity formed between the cellular sleeve and the cellular protective mesh.

Studying the characteristics and composition of the working environment (in terms of pressure, number and size of abrasive inclusions) in newly commissioned oil and gas wells force manufacturers to carry out certain engineering calculations and search for options for improving the design of equipment supplied to facilities in order to achieve maximum reliability and durability.

In order to ensure uninterrupted operation of cage-type butterfly valves designed to regulate the flow rate of the medium, flow rate, pressure with a sufficiently high content of medium-sized abrasive inclusions, it is proposed to include in the design of the butterfly valves a cage protective mesh 4 (see Fig.), Which is designed to protect against destruction of the cage sleeve 3 (element of the throttle pair of the regulating device). Protective mesh 4 is made of carbide material: sintered silicon carbide SSiC, silicon carbide with a reaction bond RBSiC, silicon carbide on a nitride bond NBSiC, hardened zirconium TZ, silicon nitride SN, tungsten carbide TC, VK and others, which have proven themselves to be excellent in work when exposed to abrasive inclusions present in the flow of the transported medium.

The regulation of the flow rate of the working medium occurs by increasing / decreasing the total area of the perforated through holes in the cage sleeve 3 when the plunger assembly 1 is moved from the uppermost position to the lowermost position and vice versa. Complete shut-off of the medium flow occurs when the plunger assembly moves to the extreme lower position and the contact of its sealing surface with the sealing surface of the seat 2.

Protective mesh mesh 4, serves to take on impact damage of abrasive inclusions that can destroy the cellular sleeve 3, made of sufficiently "fragile" carbide materials.

The cellular protective mesh 4 is installed on the outer diameter of the cage sleeve 3, with the formation of cavity A between them, see figure 1. Due to this cavity A, a gap is formed between the cellular sleeve 3 and the cellular protective mesh 4, which is necessary to accommodate the deformed section of the cellular protective mesh 4 when large abrasive inclusions enter it.

Protective mesh 4 is designed to perform a number of tasks:

- protection of the cage sleeve 3 made of tungsten carbide or other hard-alloy materials from destruction and, as a result, protection from overpressure and damage to equipment located downstream;

- prevents serious potential safety problems at the butterfly valve installation site.

Protective cage mesh 4 proportionally distributes the flow around the main choke element - cage bush 3 made of tungsten carbide or other hard alloy materials.

The cellular protective mesh 4, as well as the cellular sleeve 3, has perforated holes 5 on the outer surface for the passage of the medium. The number of holes and their sizes are made in such a way as to ensure the minimum flow resistance and minimum pressure drop on it.

The protective cage mesh 4 can be installed both separately in the valve body and as part of a shut-off and control unit (throttle pair), as shown in Fig. 1.

A distinctive feature of this technical solution is the presence of a distance (gap formed by cavity A) between the cellular protective mesh 4 and the cellular sleeve 3, which directly regulates the flow of the medium (throttling). When a large abrasive particle hits the mesh with an impact of 660 J and higher, a dent may form in it (Fig. 2), which will not touch and transfer the impact energy to the cellular sleeve 3, made of hard alloy material (various ceramics / carbides ), performing regulation (throttling).

Advantages compared to structures that do not use this technical solution:

-unprotected expensive parts made of "brittle" tungsten carbide are capable of breaking down when large abrasive inclusions (abrasive, proppant) present in the flow of the working medium with a force of 660 J and more, as a rule, partially or completely destroying the main cage 3;

- protective cage mesh 4 is made of stainless materials with viscosity and mechanical properties, as well as wall thickness, allowing it to undergo deformation upon impact of large abrasive inclusions (abrasive, proppant) with a force of 660 J and more without damaging the cage sleeve 3, i.e. ... the maximum possible deformation of the cage protective mesh 4 excludes contact with the cage sleeve 3;

- the relatively low cost of manufacturing a protective cage mesh 4 in comparison with the cost of manufacturing a cage sleeve 3 from hard alloy materials;

- the ability to quickly replace the protective mesh cage 4 from the spare accessories for the product.

Claims (6)

1. An angle cage-type control valve, including a body, inlet and outlet channels of the body located at an angle of 90 °, a cage bushing installed at the intersection of the channels, a plunger installed in the cage bushing and made with the ability to overlap the channels, a cover with a hermetically placed in it is a drive that moves the plunger, characterized in that a cavity is made in front of the cage sleeve, behind which a protective cage mesh is installed. 2. The valve according to claim 1, characterized in that the openings of the cage protective mesh coincide with the openings of the cage sleeve. 3. The valve according to claim 1, characterized in that the openings of the cage protective mesh do not coincide with the openings of the cage sleeve. 4. The valve according to claim 1, characterized in that the protective mesh is made of a hard alloy material: sintered silicon carbide SSiC, or silicon carbide with a reaction bond RBSiC, or silicon carbide nitride bond NBSiC, or hardened zirconium TZ, or silicon nitride SN , or tungsten carbide TC. 5. The valve according to claim 1, characterized in that the cellular protective mesh is installed in the valve body. 6. The valve according to claim 1, characterized in that the cellular protective mesh is installed as part of the shut-off and control unit.

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