RU166990U1 - DEVICE FOR SIMULTANEOUSLY SEPARATE OPERATION OF TWO LAYERS IN A WELL - Google Patents

Abstract

1. A device (1) for simultaneous and separate operation of two layers (3, 4) in a well (2), comprising a series-connected upper pump (10), a connecting pipe (20), a lower pump (30), as well as a packer (22) rigidly fixed to the connecting pipe (20) and made with the possibility of separation of the two layers (3, 4), the hollow rod (25), continuing through the upper pump (10), the connecting pipe (20) and the lower pump (30), made with the possibility of connecting at its upper end with a column of hollow rods, while the cylinder (11) of the upper pump (10) is made pain of a larger diameter than the cylinder (31) of the lower pump (30), and the plungers of both pumps are hollow and aligned, and the plunger (12) of the upper pump (10) is movable on the hollow stem (25), and on the hollow stem (25) ) a thrust washer (15) is provided to limit the stroke of the plunger (12) of the upper pump (10), mounted above the plunger (12) of the upper pump (10), the suction valve (13) of the upper pump (10) is located in the side pipe (18) of the connecting pipes (20) above the packer (22), the discharge valve (14) of the upper pump (10) is located at the inlet the unit of the upper pump (10) and is mechanically controlled, the plunger (32) of the lower pump (30) is rigidly fixed to the hollow stem (25), and the suction valve (33) of the lower pump (30) is located at the inlet to the cylinder (31) the lower pump (30), and the discharge valve (34) of the lower pump (30) is located at the inlet of the plunger (32) of the lower pump (30) .2. The device according to claim 1, in which an additional filter (35) is installed at the intake of the lower pump (30). 3. The device according to claim 1, in which the thrust washer (15) is made with channels for the flow of well fluid. The device according to claim 1, in which the inlet of the plunger (12) of the upper pump (10) is configured to use a discharge as a saddle (16)

Description

FIELD OF TECHNOLOGY TO WHICH A USEFUL MODEL IS

The utility model relates to the field of oil production, in particular, to devices and installations for simultaneously and separately operating two layers in a well.

BACKGROUND

When developing wells using the technology of simultaneous-separate operation (ORE), it is traditional to use units containing a packer, a sucker rod pump with an additional suction valve located on the side hole of the cylinder wall and a liner. Such ORE devices provide simultaneous and separate operation of two production facilities in one well with optimal parameters for them.

In the prior art, for example, a deep-well differential sucker-rod pump for simultaneous and separate operation of two layers is known (see RU 70321, IPC F04B 47/00, publ. 20.01.2008), consisting of two pumps connected in series, namely: the upper and lower, having different diameters of cylinders and plungers and the design of discharge and suction valves. The lower pump of smaller diameter, its cylinder and plunger are equipped with two valves: suction - the usual type used in pumps of the series, mounted concentrically at the pump inlet, and pressure - conical type and mechanically controlled. The upper pump has a conventional type discharge valve on the plunger, and a suction valve mounted on the side surface of the cylinder.

The disadvantages of the known solutions of the prior art are:

- the need to replace the sucker rod pump with an additional suction valve when changing the proportion of production rates of production facilities, because the location of the additional side suction valve selects a point dividing the pump cylinder in length, in proportion to the flow rates of production facilities;

- difficulty in installing and ensuring the tightness of the additional side suction valve when placing it on the side opening of the pump cylinder wall;

- the presence of a hole on the pump cylinder limits the area of reuse;

- the liquid from two production facilities separated by a packer when rising to the surface is mixed, which makes it impossible to determine the properties (water cut, presence of mechanical impurities) of the extracted fluids, production rate of the produced fluid for each formation;

- the complication of the collection and further transportation during the production of liquids from different horizons in view of the formation of emulsion and paraffin deposits in oil pipelines, under conditions when the simultaneous supply of corrosion inhibitors and demulsifiers in one oil pipeline for liquids of different horizons is not always effective due to the incompatibility of the supplied reagents.

In order to overcome the indicated difficulties, the use is made of the devices of the wells' WEM, which provide separate lifting of the borehole fluid. For example, a pumping unit is known for simultaneous separate operation of two layers in a well (see RU 2291952, IPC ЕВВ 43/14, published January 20, 2007), which contains a lift pipe string, rod string, packer, liner and a hollow plunger differential pump, while the suction and discharge valves of the upper section of the differential pump are installed on the side.

Despite the fact that the known installation overcomes some of the difficulties outlined above, it has a rather complicated design in view of the presence of a bypass channel, and in addition, less reliability and efficiency of the installation due to the fact that the discharge valve is located in the immediate vicinity of the suction valve , which can lead to overflow of produced fluid in the opposite direction due to incomplete valve closure and / or during valve closure.

Another well-known solution, selected as the closest analogue to the claimed utility model, is a pumping unit for simultaneous and separate operation of two layers in a well (see RU 97436, IPC ЕВВ 43/14, publ. 10.09.2010), consisting of the upper and lower rod pumps, the plungers of which are connected by a hollow rod. The lower pump lifts the products of the lower reservoir to the surface through the hollow rod and the internal cavities of the pump plungers along the hollow rod string, the upper pump - the production of the upper reservoir along the tubing string.

The disadvantage of this known solution is the design complexity due to the fact that the upper pump is made circular, provided with a channel and a hollow rod sealing assembly installed above the upper pump and uncoupling the cavity of the upper pump and lift pipes, the upper pump being discharged through the discharge valve by a channel with a cavity lift pipes, which can reduce the reliability of the installation and the efficiency of oil production.

ESSENCE OF A USEFUL MODEL

The present utility model addresses the challenges of the prior art. In particular, the technical problem solved by the creation of this utility model consists in the development of a simpler and more reliable design of the device for two reservoir formations in the borehole while still providing separate lifting of the borehole fluid to the surface.

To solve the problem, a device is proposed for simultaneous and separate operation of two layers in a well, containing serially connected: an upper pump, a connecting pipe, a lower pump, and

a packer rigidly mounted on the connecting pipe, and configured to separate the two layers, and

a hollow rod extending through the upper pump, the connecting pipe and the lower pump, configured to connect at its upper end to the column of hollow rods,

the cylinder of the upper pump is made of a larger diameter than the cylinder of the lower pump, and the plungers of both pumps are hollow and are aligned, and

the plunger of the upper pump is arranged to move on the hollow rod, and on the hollow rod a thrust washer is provided to limit the stroke of the plunger of the upper pump installed above the plunger of the upper pump,

the suction valve of the upper pump is located in the side pipe of the connecting pipe above the packer, the discharge valve of the upper pump is located at the inlet of the plunger of the upper pump and is mechanically controlled,

the lower pump plunger is rigidly fixed to the hollow stem, and

the suction valve of the lower pump is located at the inlet to the cylinder of the lower pump, and the discharge valve of the lower pump is located at the inlet of the plunger of the lower pump.

In one embodiment, a device is proposed in which an additional filter is installed at the intake of the lower pump.

In one embodiment, a device is proposed in which the thrust washer is made with channels for the flow of well fluid.

In one embodiment, a device is proposed in which the inlet of the plunger of the upper pump is configured to use the discharge valve of the upper pump as a seat, and the shutter of the discharge valve of the upper pump is rigidly fixed to the hollow stem.

In one embodiment, a device is proposed in which the length of the side pipe of the connecting pipe is selected so that the suction valve of the upper pump is located essentially at the level of the roof of the upper layer.

In one embodiment, a device is proposed in which the length of the connecting pipe is selected so that the suction valve of the lower pump is located essentially at the level of the roof of the lower layer.

In one embodiment, a device is provided in which a connecting pipe is assembled from several pipe parts.

In one embodiment, a device is proposed in which the discharge valve of the upper pump is made by a controlled reciprocating movement of hollow rods.

The technical result provided by the utility model consists in increasing the reliability and durability of the device by simplifying the design of the upper pump due to the absence of any bypass channel and the presence of an internal discharge valve controlled by the reciprocating movement of the hollow rods, as well as the absence of the need to seal the hollow rod when passing through the upper pump, as it is made longer in comparison with the prototype and passes through the upper pump through, and the hollow plunger of the upper pump is used to directly communicate the subplunger and subplunger space through the fluid. Moreover, the proposed device provides the possibility of separate lifting of the produced fluid from the well for subsequent separate collection, accounting and transportation, as required by the documents regulating the extraction of minerals.

In the following description, embodiments of the proposed utility model are shown and described in more detail. It should be understood that the utility model allows other options for implementation, and some of their details allow modification in various obvious aspects without departing from the utility model, as set forth and described in the following utility model formula. Accordingly, the drawings and description, by nature, should be considered as illustrative and not as restrictive.

BRIEF DESCRIPTION OF THE DRAWINGS

The claimed device is illustrated in the figures of the accompanying drawings, in which:

in FIG. 1 shows a whole device of the present utility model installed in a well;

in FIG. 2 shows in more detail the top pump of the device of FIG. one;

in FIG. 3 shows in more detail the lower pump of the device of FIG. one.

The figures are approximate, some elements may be shown larger for clarity, some elements may be shown finer for simplicity. It should be understood that the embodiment of the claimed utility model, illustrated in the figures, is not limiting the scope of the attached utility model formula.

DESCRIPTION OF PREFERRED EMBODIMENTS

IMPLEMENTATION OF A USEFUL MODEL

Embodiments are not limited to the embodiments described herein, and other embodiments of the utility model that do not go beyond the essence and scope of this utility model will become apparent to those skilled in the art based on the information set forth in the description and knowledge of the prior art.

The elements mentioned in the singular do not exclude the plurality of elements, unless specifically indicated otherwise.

The methods disclosed herein comprise one or more steps or actions for implementing the described method.

The stages and / or actions of the method can replace each other, without going beyond the essence of the utility model. In other words, if a specific order of steps or actions is not defined, the order and / or use of specific steps and / or actions can be changed without going beyond the essence of the utility model.

In FIG. 1 shows the whole device 1 of the WEM according to the present utility model installed in well 2, which operates on the technology of the WEM of two layers: the upper layer 3 and the lower layer 4.

Figure 2 shows in more detail the upper pump 10 of the device 1 WEM, and Fig. 3 shows in more detail the lower pump 30 of the device 1 WEM.

Continuing generally with respect to FIG. 1-3, a device 1 for simultaneous and separate operation of two layers 3, 4 in a well 2 is proposed, comprising a series-connected upper pump 10, a connecting pipe 20, a lower pump 30, and also a packer 22, rigidly fixed to the connecting pipe 20 and configured the separation of the two layers 3, 4, and the hollow rod 25, continuing through the upper pump 10, the connecting pipe 20 and the lower pump 30, made with the possibility of connection at its upper end with a column of hollow rods, while the cylinder 11 of the upper pump 10 is made larger about the diameter than the cylinder 31 of the lower pump 30, and the plungers of both pumps are hollow and aligned, and the plunger 12 of the upper pump 10 is arranged to move on the hollow rod 25, and on the hollow rod 25 there is a thrust washer 15 to limit the stroke of the plunger 12 of the upper pump 10 installed above the plunger 12 of the upper pump 10, the suction valve 13 of the upper pump 10 is located in the side pipe 18 of the connecting pipe 20 above the packer 22, the discharge valve 14 of the upper pump 10 is located at the inlet of the plunger 12 of the upper the sucker 10 and is made mechanically controlled by the reciprocating movement of the hollow rods, the plunger 32 of the lower pump 30 is rigidly fixed to the hollow rod 25, and the suction valve 33 of the lower pump 30 is located at the inlet to the cylinder 33 of the lower pump 30, and the discharge valve 34 of the lower pump 30 is located at the inlet of the plunger 32 of the lower pump 30.

The flow rate of the lower reservoir 4 is determined by the performance of the lower pump 30 and the operating mode of the pumping machine, while the flow rate of the upper reservoir 3 is determined by the productivity of the upper pump 10, taking into account the volume of the rod 25 of the lower pump 30 located in the subplunger space of the upper pump 10 and the operating mode of the pumping machine . The upper and lower pumps are a type of sucker rod pumps, forming together a differential sucker rod pump.

In one of the preferred embodiments of the device 1 WEM can be additionally installed a filter 35 at the intake of the lower pump 30. Thanks to the filter 35, the operation of the entire device 1 WEM is even more reliable by eliminating the ingress of mechanical and other harmful impurities to the inlet of the lower pump 30.

In one of the additional preferred embodiments of the device 1 of the WEM, the thrust washer 15 can be made with channels for the flow of well fluid, which will contribute to a better (i.e., larger) flow of the produced fluid from the hollow plunger 12 of the upper pump 10 into the upper plunger space of the upper pump 10 and further into the pipe string, and will increase the efficiency of the proposed device, the reliability of this can also be increased, because due to the presence of channels for flowing, the borehole fluid will flow more evenly, and the design of the upper pump will be less affected by hydraulic pulses of the flowing borehole fluid.

In a preferred embodiment of the device 1 WEM, the inlet of the plunger 12 of the upper pump 10 is configured to use the pressure valve 14 of the upper pump 10 as a seat 16, and the valve 17 of the pressure valve 14 of the upper pump 10 is rigidly fixed to the hollow stem 25. It should be understood that for manufacturing and giving the saddle 16 and the shutter 17 the necessary shapes and sizes, materials and methods standard in the art can be used.

Cylinders (housings) of pumps, plungers of pumps, as a rule, are made all-metal from solid metals, for example, by rolling steel. Billets can be subjected to additional thermal, anti-corrosion and other types of processing, depending on the requirements for products used in oil production.

In a preferred embodiment of the device 1 WEM, the length of the side pipe 18 of the connecting pipe 20 is selected so that the suction valve 13 of the upper pump 10 is located essentially at the level of the roof of the upper layer 3. This ensures the highest efficiency of the upper pump 10.

In a preferred embodiment of the device 1 WEM, the length of the connecting pipe 20 is selected so that the suction valve 33 of the lower pump 30 is located essentially at the level of the roof of the lower layer 4. This ensures the highest efficiency of the lower pump 10.

It should be understood that with such a length of the connecting pipe 20, as described above, the filter 35 mounted on the intake of the lower pump 30 will be located essentially at the level of the lower layer 4 (opposite the perforation holes), which will further contribute to its efficiency, and, therefore, improving the reliability and the entire device 1 WEM.

In a preferred embodiment of the device 1 WEM, the connecting pipe 20 is assembled from several pipe parts, this allows you to more accurately select the length of the connecting pipe 20 when assembling the device and preparing it for launching in the well depending on the specific parameters of the well, in particular, the depth of the developed formations.

The proposed device 1 WEM works as follows. Before it is lowered into the well, the device is assembled through a serial connection from the bottom up: the lower pump 30, the connecting pipe 20 and the upper pump 10. The length of the connecting pipe is selected depending on the depth of each of the layers 3.4 in a particular well 2. The connecting pipe can be assembled from standard pipe parts having a fixed length, for example, 1 m, 3 m, 5 m or more. To install the components of the device, in particular, the connecting pipe, standard means are used in the art, such as couplings, sub, etc. to ensure reliable and rigid connection of parts of the device.

After the device 1 is assembled, the packer 22 is installed and rigidly fixed on the connecting pipe 20. The device 1 is lowered into the well 2, the tubing string is connected to the hollow rod 25 and the packer 22 is planted at the required depth for separation from the formation fluid 3 and 4.

If necessary, when extracting products from the lower layer, complicated by sand or by the presence of a large amount of mechanical impurities, before lowering the device 1 into the well 2, a filter 35 is installed at the intake of the lower pump 30.

After the device is located in the well, its operation begins. Device 1 operates in the following modes.

During the course of the hollow plungers 12, 32 of the pumps 10, 30 down, the suction valves 13 and 33 are closed by the pressure of the liquid column in the tubing and in the column of hollow rods, respectively, and the discharge valves 14, 34 open, as a result of which the liquid located in the sub-plunger spaces flows into the supraplunger spaces.

During the course of the hollow plungers 12, 32 of the pumps 10, 30, the discharge valves 14, 34 of the lower and upper pumps 10, 30 are closed. The discharge valve 34 of the lower pump 30 is closed due to the pressure of the liquid column in the column of hollow rods, and the discharge valve 14 of the upper pump 10 is closed due to the upward movement of the hollow rod 25 connected to the column of hollow rods. As a result, a vacuum is created in the sub-plunger spaces and the produced fluid through the open suction valves 13, 33 enters the pumps 10, 30.

Thus, the produced fluid of the lower reservoir 4 rises inside the column of hollow rods (not shown in the figures) and does not mix with the produced fluid of the upper reservoir 2, which rises along the tubing space (not shown in the figures)

Using the proposed device for simultaneous and separate operation of two layers in one well provides the ability to select and supply the produced fluid to the consumer from different layers separately. This allows you to control the parameters of the produced fluids from the reservoirs, to determine the flow rate of each reservoir, to prevent the formation of emulsions and paraffin deposits in oil pipelines and to prevent the flow of corrosion inhibitors and demulsifiers into the oil pipelines separately for each produced fluid.

Moreover, the proposed device is characterized by increased reliability and durability due to the simplification of the design of the upper pump due to the absence of any bypass channel, i.e. there is no need to make the product from components that are complex in shape and difficult to design, and also due to the presence of an internal discharge valve controlled by the reciprocating movement of the hollow rods, and also due to the lack of the need to seal the hollow rod when passing through the upper pump, because it is made longer in comparison with the prototype and passes through the upper pump through, and the hollow plunger of the upper pump is used to directly communicate the subplunger and subplunger space through the fluid. Moreover, the proposed device provides the possibility of separate lifting of the produced fluid from the well for subsequent separate collection, accounting and transportation, as required by the documents regulating the extraction of minerals.

In the above description of examples, directional terms (such as “above,” “top,” “below,” “bottom,” “top,” “bottom,” etc.) are used for convenient reference to the accompanying drawings. In general, “above”, “upper”, “up” and similar terms are associated with the direction to the earth’s surface relative to the well, and “lower”, “lower”, “down” and similar terms are associated with the direction from the earth’s surface relative to the well.

For the purposes of the present description, the term “connected” (in all its forms, connect, connecting, connected, etc.) generally means the articulation of two components (electrical or mechanical) with each other directly or indirectly. Such an articulation may be essentially immobile or essentially movable. Such an articulation can be achieved by two components (electrical or mechanical) and any additional intermediate elements made in one piece in the form of a single body with each other or two components. Such an articulation may be constant in essence or may be removable or detachable in essence, unless otherwise specified.

For the purposes of the present description, terms of the form “essentially”, “approximately” or “approximately”, as well as their derivatives, mean slight deviations from the indicated digital range, the indicated location or the indicated position in time and space, for example, standard deviations that can observe when measuring several samples according to the test method or relative deviations from absolute values.

Although exemplary embodiments have been described in detail and shown in the accompanying drawings, it should be understood that such embodiments are merely illustrative and not intended to limit a wider utility model, and that this utility model should not be limited to the specific arrangements shown and described and designs, since various other modifications may be apparent to those skilled in the art.

Claims (8)

1. A device (1) for simultaneous and separate operation of two layers (3, 4) in a well (2), comprising a series-connected upper pump (10), a connecting pipe (20), a lower pump (30), and a packer (22) rigidly attached to the connecting pipe (20) and configured to separate the two layers (3, 4), and a hollow rod (25) extending through the upper pump (10), the connecting pipe (20) and the lower pump (30), configured to connect at its upper end to the column of hollow rods, while the cylinder (11) of the upper pump (10) is made of a larger diameter than the cylinder (31) of the lower pump (30), and the plungers of both pumps are hollow and coaxial, moreover the plunger (12) of the upper pump (10) is arranged to move on the hollow stem (25), moreover, a thrust washer (15) is provided on the hollow stem (25) to limit the stroke of the plunger (12) of the upper pump (10) installed above the plunger (12) of the upper pump (10), the suction valve (13) of the upper pump (10) is located in the side pipe (18) of the connecting pipe (20) above the packer (22), the discharge valve (14) of the upper pump (10) is located at the inlet of the plunger (12) of the upper pump (10) and made mechanically controlled, the plunger (32) of the lower pump (30) is rigidly fixed to the hollow stem (25), and the suction valve (33) of the lower pump (30) is located at the inlet to the cylinder (31) of the lower pump (30), and the discharge valve (34) of the lower pump (30) is located at the inlet of the plunger (32) of the lower pump (30). 2. The device according to claim 1, in which an additional filter (35) is installed at the intake of the lower pump (30). 3. The device according to claim 1, in which the thrust washer (15) is made with channels for the flow of well fluid. 4. The device according to claim 1, in which the inlet of the plunger (12) of the upper pump (10) is configured to use the upper pump (10) as the seat (16) of the discharge valve (14), and the discharge valve (14) of the valve (14) ) of the upper pump (10) is rigidly fixed to the hollow stem (25). 5. The device according to claim 1, in which the length of the side pipe (18) of the connecting pipe (20) is selected so that the suction valve (13) of the upper pump (10) is located essentially at the level of the roof of the upper layer (3). 6. The device according to claim 1, in which the length of the connecting pipe (20) is selected so that the suction valve (33) of the lower pump (30) is located essentially at the level of the roof of the lower layer (4). 7. The device according to claims 1 or 6, in which the connecting pipe (20) is assembled from several pipe parts. 8. The device according to claim 1, in which the discharge valve (14) of the upper pump (10) is made controlled by the reciprocating movement of the hollow rods.

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