RU2610622C1 - Multi-channel high-pressure regulator "quadriga" with interchangeable throssells - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: multichannel high-pressure regulator comprises a body element with longitudinal channels and with ball valves in each. Corks of the ball valves are located in the seats and are connected to the spindles. The body element consists of two half-shells interconnected by a central bolt. Conjugate axis of longitudinal channels form between them an obtuse angle, and the angle of their side are inclined towards the central axis. In the zone of channels conjunction, the cavities are formed. These cavities are placed in the seats, which cover the ball plug. The plug has a diametric through-hole, in which the interchangeable throttle is placed. In one of the half-shells at an angle to the axis of mentioned through-hole, the spindle is mounted, coaxially to which, on the opposite side of the tube, in the other half-shell it's support is placed. The axis of the through-hole in the tube and the spindle axis are located in the same longitudinal center plane at an angle to each other with the possibility of combining the throttle holes with longitudinal holes in the half-shells in the open position and the ball valve with the possibility of combining with the hole axis of the throttle hole with the safety-designed plug. The latter is placed in the other half-shell and is adapted to reset the pressure from the cavity between the seats when changing the throttle when the spindle is rotated by 180°.

EFFECT: ensuring the continuity of the working fluid flow in the process of replacing the throttles.

6 dwg

Description

The invention relates to the field of mechanical engineering, mainly to means for regulating the flow of fluid in pipe fittings, namely to valves with spherical slewing plugs and with replaceable chokes.

As you know, in oil and gas production, the oil production rate reaches 3500 t / day of gas - 1.5 ... 2 million m ³ at a reservoir pressure of 800-900 kgf / cm ² and oil temperature of 135-150 ° C with a possible content of aggressive components: H ₂ S - up to 6 % and CO ₂ - up to 12%.

In these difficult operating conditions, the main load is borne by the parts of shut-off and control valves, which reduces their service life.

As a result, the tightness of the valves decreases, significant material resources are involved to restore and maintain the operability of the equipment.

One of the ways to ensure stability and regulate the operation of oil or gas wells is to use multi-channel high-pressure regulators with ball valves with replaceable chokes integrated in the ball plug.

Known multi-channel high pressure regulator with interchangeable chokes, comprising a housing element with at least two radially arranged longitudinal channels formed in it, each of which is equipped with a ball valve, the tube of which is located in seats installed in seats with the possibility of combining their through holes with the indicated longitudinal channels, the plug is connected to the spindle, and each channel is in communication with nozzles with flanges made with the possibility of detachable connection with the pipe parts the cable, while the regulator is equipped with a replaceable throttling insert - a throttle (RF patent RU 77461, IPC G05D 7/00, published: 20.10.2098).

This technical solution is the closest to the invention in technical essence and the achieved result, therefore, it is taken as a prototype.

The design flaws include the fact that in the event of failure of parts of one of the cranes, the entire device must be dismantled, the same applies to work related to replacing worn throttle bushings.

To carry out this operation, it is necessary to transfer the work of the well to a spare branch, on which a reserve choke of a given diameter should be installed, then relieve pressure from the line and only then disassemble the flange connection and dismantle the regulator from the pipeline.

Thus, changing the throttle sleeve of the regulator requires a break in the supply of the working medium through the pipeline, time-consuming and lengthy.

The technical result from the use of the invention is to ensure the continuity of the flow of the working medium in the process of replacing the throttling inserts.

The following are general and particular significant features characterizing the causal relationship of the invention with the specified technical result.

A multi-channel high-pressure regulator with interchangeable chokes comprises a housing element with at least two radially arranged longitudinal channels formed therein. Each of the channels is equipped with a ball valve, the plug of which is placed in the saddles installed in the seats with the possibility of combining their through holes with the specified longitudinal channels. The plug is connected to the spindle, and each channel is in communication with nozzles with flanges made with the possibility of detachable connection with parts of the pipeline. The regulator is equipped with a replaceable throttle insert - a throttle. The specified housing element is made integral in the form of two half-shells, each of which is structurally combined with the corresponding pipe. Both half-bodies are interconnected by a central bolt. The axes of the conjugate longitudinal channels form an obtuse angle between themselves, the apex of which is located in the plane of the half-housing connector, and the sides of the angle are inclined to their central axis. In the mating zone of the channels, cavities are formed in which saddles are placed covering the ball plug. The plug has a through diameter hole in which said interchangeable choke is located. In one half-shell, an spindle is installed at an angle to the axis of the through hole in the plug, coaxially to which its support is placed on the opposite side of the plug in the other half-shell. The axis of the bore hole in the plug and the axis of the spindle are placed in one longitudinal diametrical plane at an angle to each other with the possibility of combining the hole for the throttle with the longitudinal holes in the half-bodies when the ball valve is open and with the possibility of combining the hole for the throttle with the hole for the safety plug located in another half-housing, and made with the possibility of pressure relief from the cavity between the saddles when changing the throttle, when the spindle is rotated 180 °.

The device is illustrated by drawings, where: in FIG. 1 shows a front view of the controller; in FIG. 2 is a side view; in FIG. 3 is a longitudinal section AA in FIG. one; in FIG. 4 is a partial view of a longitudinal section AA in FIG. 1 in the position of the regulator "OPEN"; in FIG. 5 is a partial view of a longitudinal section aa in FIG. 1 in the position of the regulator "CLOSED"; in FIG. 6 is a partial view of a longitudinal section aa in FIG. 1 in the “THROTTLE CHANGE” control position.

A multi-channel high-pressure regulator with interchangeable chokes, comprises a housing element 1 with at least two radially arranged longitudinal channels 2 formed therein.

Each of the channels is equipped with a ball valve, the plug 3 of which is located in the saddles 4 installed in the seats with the possibility of combining their through holes 5 with the specified longitudinal channels 2.

The plug 3 is connected to the spindle 6, and each channel 2 is in communication with the nozzles 7, made with the possibility of detachable connection with parts of the pipeline. The regulator is equipped with a replaceable throttle insert - throttle 8.

The specified housing element 1 is made integral in the form of two half-shells 9 and 10, each of which is structurally combined with the corresponding pipe 7.

Both half-shells 9 and 10 are interconnected by a central bolt 11

The axes of the conjugate longitudinal channels form an obtuse angle α between themselves, the apex of which is located in the plane of the BB connector of the half-bodies 9 and 10.

The sides of the angle α are inclined to their central axis BB in angle β.

In the mating zone of the channels 2, cavities are formed in which saddles 4 are located, covering the ball plug 3.

The plug 3 has a through diametrical hole in which the indicated replaceable choke 8 is placed.

In one half-shell 10, an spindle 6 is installed at an angle to the axis of the through hole in the plug 3, coaxially to which its support 12 is placed on the opposite side of the plug 3 in the other half-shell 9.

The axis of the bore hole in the plug 3 and the axis of the spindle 8 are placed in one longitudinal diametrical plane at an angle Ψ to each other with the possibility of combining the hole for the throttle 6 with the longitudinal holes 4 in the half-bodies 9 and 10 when the ball valve is open (Fig. 4) and, with the possibility of combining the hole for the throttle 6 in the plug 3 with the hole for the safety plug 13 in another half-housing 9 when the spindle 6 is rotated 180 °.

The safety plug 13 is configured to release pressure from the cavity L between the seats 4 when changing the throttle 8.

The decision to make the case with a central connector allowed us to get away from the design of cranes with a "floating plug" and go to the design - "plug in the supports."

Given the large pressure of the working medium (up to 35 MPa), this solution allows to reduce the torque on the spindle of the crane and, as a result, when automating the regulator, use less powerful and cheaper drives for control.

Reducing the moment on the spindle also allowed us to move from the seal of the crane "polymer seats" to the seal - "metal for metal."

Such a solution in conditions of abrasive and aggressive environments allows to increase the resource of ball valves.

In addition, in each ball valve, the axis of the spindle and the axis of the bore in the plug are not perpendicular to each other, and the axis of the spindle is not perpendicular to the axis of the saddles.

This solution made it possible to install a replaceable throttle bushing in the through-hole of the ball plug and make it possible to replace it on a working pipeline without stopping it.

Comparison of the claimed technical solution with the prior art known from the scientific, technical and patent documentation as of the priority date in the main and related sections did not reveal a tool that has features that are identical to all the features contained in the claims proposed by the applicant, including the purpose of the application.

Those. the set of essential features of the claimed solution was not previously known and is not identical to any known technical solutions, therefore, it meets the condition of patentability "novelty".

This technical solution is industrially applicable, since its purpose is indicated in the description of the application and the title of the invention, it can be implemented industrially when servicing and repairing multi-channel high-pressure regulators, feasibly and reproducibly, and the distinguishing features given in the claims allow to obtain the desired technical result, i.e. are significant.

The invention, as described in the claims, can be carried out using the tools and methods described in patent RU 77461, which became public until the priority date of the invention.

Therefore, the claimed technical solution meets the condition of patentability "industrial applicability".

An analysis of the known technical solutions in the art showed that the proposed technical solution does not follow explicitly from the prior art for the specialist, since solutions having features matching his distinctive features are not identified, and the known effects of the distinctive features on the identified solutions are not confirmed the technical result indicated in the application materials.

Those. the claimed solution has features that are not found in the known technical solutions, and the use of these features in the claimed combination of essential features makes it possible to obtain a new technical result - ensuring the continuity of the flow of the working medium in the process of replacing the throttling inserts.

Therefore, the proposed technical solution can only be obtained through a creative approach and is not obvious to the average person skilled in this field, i.e. has an inventive step in comparison with the existing level of technology.

The device operates as follows.

As in a conventional ball valve in the "open" position (Fig. 4), the hole in the ball plug 3 coincides with the channel 2 in the half-bodies 9 and 10.

To close the valve, it is necessary to turn plug 3 at a 90 ° angle; when plug 3 is rotated through 180 °, the hole in ball plug 3 with installed throttle bushing (throttle) 8 coincides with the technological hole in another half-housing 9, which allows dismantling of throttle bushing 9.

To do this, the safety plug 13 is unscrewed, through the hole in which pressure is released from the cavity L between the seats 4, as a result of which the seats 4 are tightly pressed against the surface of the ball plug 3, thereby ensuring reliable sealing of the cavity L.

As a result of pressure relief, it becomes possible to remove the throttle sleeve 8 from the ball plug 3 and install another one in its place.

All this is done without stopping the pipeline, while the throttle sleeve 8 changes on one ball valve, other parallel ball valves work in parallel.

The controller according to the invention operates according to the following algorithm.

When the pressure in the well is high, only one ball valve with a throttle sleeve (insert) 8 of small diameter is used.

As the reservoir pressure decreases, subsequent ball valves with inserts 8 of small diameter additionally open alternately.

If the pressure drops so that the total flow rate of the working medium when using holes of a given diameter in the bushings 8 is not enough, the corresponding throttle bush 8 is dismantled and a throttle bush 8 with a larger hole is installed in its place when each ball valve is closed.

In case of failure of the sleeve 8 as a result of erosion wear, it is always possible to replace it with a new one without stopping the flow of the working medium through the pipeline.

Therefore, the invention is a maintainable multi-stage flow control system both by shutting off ball valves and replacing bushings 8, which reduces the time spent on changing the well operating mode, and does not require additional pipeline shutdown and the use of a special tool.

The main advantages of the new regulator include:

- compactness;

- maintainability;

- the ability to produce quick step-by-step regulation of the flow rate of the working environment;

- thanks to the installation of throttle bushings with different bore diameters in ball plugs, it is possible to obtain precise control over a long time without readjustment by alternately or simultaneously opening the valves;

- the ability to replace four throttle bushings under pressure through openings in the housing;

- at the time of replacement of the throttle bushings, the medium continues to be supplied through the pipeline, since it is possible to use redundant channels;

- unlike an adjustable throttle, there are no linearly moving parts in the design, which eliminates the failure due to the deposition of sand in its cavities or freezing of water;

- the design can be automated and included in the self-propelled gun system when independent actuators are installed on each crane;

- the use of the invention gives an economic effect as a result of reducing losses of material and financial resources due to downtime of wells.

This regulator can be used in a system for automated control of the flow rate of wells located in remote or inaccessible places, where maintenance and presence of personnel is difficult or where there is no power supply.

Claims (1)

A multi-channel high pressure regulator with interchangeable chokes, comprising a housing element with at least two radially arranged longitudinal channels formed in it, each of which is equipped with a ball valve, the plug of which is located in seats installed in seats with the possibility of combining their through holes with the specified longitudinal channels, the plug is connected to the spindle, and each channel is in communication with nozzles with flanges made with the possibility of detachable connection with parts of the pipeline, etc. this regulator is equipped with a replaceable throttling insert - a throttle, characterized in that the said case element is made integral in the form of two half-shells, each of which is structurally combined with a corresponding pipe, both half-shells are interconnected by a central bolt, the axes of the conjugated longitudinal channels form an obtuse angle, the apex of which is located in the plane of the half-housing connector, and the sides of the angle are inclined to their central axis, moreover, cavities in which puppies are saddles covering a ball plug having a through diameter hole in which said interchangeable throttle is located, and a spindle is installed in one half-shell at an angle to the axis of the said through hole in the plug, coaxially to which its support is placed on the opposite side of the plug, and the axis of the bore in the plug and the axis of the spindle are placed in one longitudinal diametrical plane at an angle to each other with the possibility of combining the hole for the throttle with the longitudinal holes in the half-core whiskers in the open position and the ball valve with the possibility of combining the throttle hole in the plug with hole travmobezopasnosti plug in the other half shell adapted to depressurization of the cavity between the seats when changing the throttle of the spindle is rotated at 180 °.

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