RU2381542C1 - High pressure liquid flow regulator - Google Patents

Abstract

FIELD: physics; control.

SUBSTANCE: invention can be used in oil and gas industry for maintaining given flooding modes, as well as for rapid change of flow of liquid pumped into strata depending on change of bed intake and its production rate. The flow regulator has a housing in form of two cups 1 and 2, whose bottom parts face each other and are tied together by a locking bar 5. At the liquid outlet side, one of the cups is stepped and has a thick-walled bottom with openings 6 and 7 which are concentric with the locking bar. Thrust sockets 8 and 9 are placed in the openings with possibility of axial displacement and inside the sockets there are nozzles 16 and 17 with throttle calibrated openings from 2 mm to 20 mm depending on the flow regulation range. The thrust sockets are attached to dividing connection pipes 12 and 13 linked to outlet openings at the bottom of the second cup. Connection pipes 12 and 13 are also joined by sleeve nuts to shut-off ball valves/tap valves 18 and 19.

EFFECT: invention increases accuracy of regulation in aggressive-abrasive media due to possibility of rapid exchange of worn out nozzles, simple design and manufacturing technology.

2 cl, 3 dwg

Description

The invention relates to the field of instrumentation and can be used in the oil and gas industry in a system for maintaining reservoir pressure (RPM) to withstand predetermined technologies of waterflooding regimes of a formation, as well as for promptly changing the flow rate of injected fluid into a formation depending on changes in the injectivity of the formation and its oil recovery.

Known fluid flow regulator (RRL) / application 2001111739/06, IPC G05D 7/01, publication date 2003.11.10 /, comprising a housing with inlet and outlet nozzles and a movable spring-loaded regulating body that divides the internal cavity of the housing into three parts, interconnected by means of two chokes installed in series (setting the flow value and automatically adjustable).

Known differential pressure regulator / application 2000126818/09, IPC G05D 7/01, publication date 2003.11.10 /, comprising a housing with inlet and outlet openings, a cover, a diaphragm, a loading spring with a supporting element, a rod with a locking element, an outlet pressure cavity and back pressure.

The above-mentioned known devices have the following general disadvantages, which do not allow to achieve the desired technical result.

These analogues use many hydraulic and moving mechanical elements (springs, diaphragms, equalizing valves, etc.), which sharply reduce the accuracy of regulation and increase the likelihood of failure and make it impossible to use them in aggressive abrasive environments. Also known devices for controlling the flow rate have an instant effect on the hydraulic system, without distinguishing the steady state hydraulic mode from hydraulic vibrations. All of them use a spring-loaded actuator (a) for the locking element, which limits the use of these devices outside their working (permissible) pressure ranges and eliminates the clear fixation of the locking element.

Also known is a high-pressure fluid flow regulator (see patent No. 43636, IPC, publ. In BI No. 3, 01/27/2005), comprising a housing in the form of a pipe with flanges at the ends that are closed by covers by bolting them to the flanges, so called a choke chamber, and dividing pipes equipped with shut-off valves, thrust sockets, in the wall of the housing (choke chamber), for placement of chokes with throttle calibrated holes from 2 to 20 mm in them.

The known regulator in its technical essence is closer to the proposed one and can be adopted as a prototype.

The disadvantages of the known controller include the following. It is low-tech in manufacture and inconvenient in operation. So, for example, it is complex in design and laborious to manufacture, it requires a lot of work on gas cutting and electric welding. In addition, when wells are injected into the formation through a regulator of aggressive and abrasive fluids, the nozzle openings wear out over time, which adversely affects the accuracy of the technological regime. At the same time, operational replacement of worn fittings is not provided.

The technical task of the invention is the elimination of the above disadvantages of the prototype.

A high-pressure fluid flow regulator comprising a housing with thrust sockets installed in its openings for accommodating fittings with calibrated orifice openings from 2 to 20 mm and dividing nozzles equipped with shut-off valves.

What is new is that the body is made in the form of two glasses facing each other with bottom parts fastened together by a fixing rod in the central part; one of the glasses, from the liquid inlet side, is made stepwise and with a thick-walled bottom with holes made concentrically with respect to the fixing rod, while the thrust sockets in the above-mentioned holes are mounted with the possibility of axial movement and fixedly mounted to dividing pipes in communication with the outlet openings made in the bottom of the second glass, and the shut-off valves are fixed to the dividing nozzles using a quick coupling using union nuts.

In this case, a ball valve or an electromagnetic valve or a ball valve is used as a shut-off valve.

The presented drawings explain the essence of the inventive regulator, where Fig. 1 shows a general view of a high-pressure fluid flow regulator, where a housing made in the form of two glasses is visible, the fixing rod of these glasses and dividing pipes equipped with shut-off valves (taps) are assembled, in partial section.

In Fig.2 - the same as in Fig.1, view A, where a partially depicted stepped glass with an inlet channel in its bottom, dividing nozzles, as well as a thrust socket for the nozzle mounted with the possibility of axial movement, and the nozzle and o-rings, in section.

Figure 3 is a view B of figure 1, which shows a quick connection of a shut-off valve (valve) with a dividing pipe using a union nut, in a section.

The proposed fluid flow controller contains a housing made in the form of two glasses 1 and 2 (see Fig. 1), facing the bottom parts 3 and 4 respectively to each other, and fastened together by a fixing rod 5 in the central part. One of the glasses 1 (see figure 2), from the side of the liquid inlet (liquid inlet is shown by an arrow), is made stepwise and with a thick-walled bottom 3 with many holes 6 and 7 (see figure 1), made concentrically relative to the fixing rod 5 . In the said openings 6 and 7 with axial displacement, thrust sockets 8 and 9 with openings 10 and 11 are mounted fixed to the dividing nozzles 12 and 13, in communication with the outlet openings 14 and 15, made in the bottom of the second glass 2. Inside the thrust sockets 8 and 9 are installed nipples 16 and 17 with a possible zhnosti detachably with throttle orifices of from 2 to 20 mm (perhaps more) and a quantity of 4 or 6 pieces. depending on the need to control fluid flow over a wide range. The dividing nozzles 12 and 13 are equipped with shut-off valves 18 and 19, fixed to them by means of a quick-disconnect connection using a union nut 20 (see Fig. 3). The tightness of the bushings 21, the thrust sockets 8 and 9 and the fittings 16 and 17 provide the sealing rings 22, 23 and 24, made of an elastic and elastic material, for example rubber. As a wear-resistant material for the manufacture of fittings, ceramic-metal or ceramic materials are used. The fittings 16 and 17 are protected against contamination by the filter 25.

The installation of thrust sockets with the possibility of axial movement, as well as the fastening of shut-off valves to dividing nozzles with a quick-disconnect connection, can quickly replace the nipples if they are worn above the permissible value.

The fluid flow regulator operates as follows.

After a preliminary check of the reliability of the regulator’s connections, it is delivered to the installation site, for example, it can be installed in a pressure comb unit according to TU 366/00 / -00220239-97, on water conduits to injection well fittings in oil production fields, as well as in other industries requiring manual or programmed flow control of liquid and gaseous high-pressure media. After installing the regulator in the high pressure hydraulic system using a coupling or electric welding, open all the shut-off valves 18 and 19 of the dividing nozzles 12 and 13 manually or automatically according to a predetermined program, thereby ensuring quick filling of the discharge line (water conduit) with liquid. Then, according to the technological map of the modes compiled taking into account changes in oil recovery, the choice of options for the total flow area of the throttle holes of the fittings 16 and 17 by opening one and closing the other shut-off valves 18 and 19 of the dividing pipes 12 and 13 achieve the required fluid flow rate. At the same time, the number of possible combinations of the total cross section of the throttles is several tens and may be hundreds depending on the number of fittings, and therefore, on the number of shut-off valves. The combination of the total cross-section of the throttles corresponding to a certain fluid flow rate is prepared in advance and is located at the service operator or dispatcher.

The throttle openings of the fittings, when they contain mechanical particles in the transported fluid, are subject to wear. To replace a worn fitting, first close the pressure pipe valve (the pressure pipe valve is not shown in Fig.), Then, unscrewing the union nuts 20, disconnect the shut-off valve and then, from the stepped glass 1, remove the stop sockets 8 or 9 with the fittings 16 and 17 located there connected to part of the dividing pipes. Then, from the thrust nests, the worn-out fittings are removed and new fittings are inserted instead.

The technical and economic advantage of the invention is as follows.

Compared with the prototype, the claimed regulator is much simpler in design, compact, does not require a lot of gas cutting and welding work for its production, timely and efficient replacement of worn fittings, which will positively affect the operation of injection wells in the optimal mode, therefore, will positively affect oil recovery. By the filing date of the application prepared working drawings for its manufacture.

Claims (2)

1. The regulator of the flow rate of high pressure liquid containing a housing with thrust sockets installed in its holes for accommodating fittings with throttle calibrated holes from 2 to 20 mm and dividing nozzles equipped with shut-off valves, characterized in that its body is made in the form of two glasses, facing each other with bottom parts fastened together in the central part by a fixing rod; one of the glasses, from the liquid inlet side, is made stepwise and with a thick-walled bottom with holes made concentrically with respect to the fixing rod, while the thrust sockets in the above-mentioned holes are mounted with the possibility of axial movement and fixedly mounted to dividing pipes in communication with the outlet openings made in the bottom of the second glass, and the shut-off valves are fixed to the dividing nozzles using a quick coupling using union nuts. 2. The controller according to claim 1, characterized in that a ball valve or an electromagnetic valve or a ball valve is used as a shut-off valve.

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