RU2578093C1 - Plant for simultaneous separate operation of two formations - Google Patents

Abstract

FIELD: pumps.

SUBSTANCE: invention relates to well pumping assemblies and can be applied for simultaneous and separate operation of two formations. Installation includes production tubing, upper and lower Packers mounted above respective reservoirs, stem with channels, and rod pump with additional suction valve, communicated with outlet hole in cylinder wall, hollow case with side hole, communicated with annular space, main suction valve in lower part, and separating piston placed below hole for additional suction valve in cylinder with possibility of restricted longitudinal movement downwards into body cavity and upwards under action of plunger, extra pressure valve passing from housing cavity through side hole in annular space. Main and additional suction valves are communicated through channels arranged in shank, with one of formations not communicated with other channel, while plunger cavity communicates with tubing. Additional suction valve is connected with hole in cylinder through annular space formed by jacket, surrounding lower part of cylinder with a hole and body, which is equipped at bottom, below side hole, with additional cylinder. Dividing piston is equipped with additional piston for additional cylinder, with and inner channel, communicating under-piston space of additional cylinder with inner cavity of housing. Additional pressure valve is installed in inner channel of dividing piston.

EFFECT: technical result consists in improving efficiency of dual operation of small diameter wells.

1 cl, 2 dwg

Description

The invention relates to the oil industry, in particular to downhole pumping units.

Known borehole pumping unit for simultaneous and separate operation of two layers (RF patent No. 2377395, ЕВВ 43/14, publ. 12/27/2009 in bull. No. 36), containing a column of lift pipes, a column of rods, a packer, a shank with channels, a rod pump with a hole in the cylinder and a casing communicating the hole with an additional suction valve installed in one of the channels of the shank.

The disadvantage of this installation is the mixing of reservoir products, which makes it difficult to determine their flow rates and water cut.

The closest in its technical essence to the proposed one is a unit for simultaneous and separate operation of the formations with the lifting of the products of one of them along the production casing (utility model patent No. 133191, ЕВВ 43/14, published on 10/10/2013 in Bulletin No. 28).

The installation contains an additional packer, additional suction and discharge valves with bypass channels.

The disadvantage of the installation is the large transverse dimension due to the additional channels and bypass channels located on the side, which limits its use in wells with a reduced diameter of the production string (EC).

The technical problem solved by the proposed installation is to reduce its transverse size for use in wells with a small diameter EC.

The specified technical problem is solved by the installation for simultaneous and separate operation of two layers, including a column of elevator pipes, upper and lower packers installed above the corresponding layers, a liner with channels, a rod column and a sucker rod pump with an additional suction valve connected to the outlet with a hole in the cylinder wall, a hollow body with a side hole in communication with the annulus, a main suction valve in the lower part and a separation piston located below the hole for additional of a suction valve in the cylinder with the possibility of limited longitudinal movement down into the cavity of the housing and upward under the influence of the plunger, an additional discharge valve passing from the cavity of the housing through the side opening into the annulus, while the main and additional suction valves are connected by channels located in the shank, with one of the layers, not communicated with the other channel, and the cavity of the plunger is communicated with elevator pipes.

What is new is that the additional suction valve is in communication with the bore in the cylinder by an annular space formed by a casing covering the outside of the lower part of the cylinder with the bore and a housing which is provided with an additional cylinder below and below the side opening, and the separation piston is equipped with an additional piston for the additional cylinder and an internal channel communicating the under-piston space of the additional cylinder with the internal cavity of the housing, while the additional pressure valve is installed in the internal channel of the separation piston.

In FIG. 1 shows a diagram of the installation with the rise of EC production of the upper layer.

In FIG. 2 shows the installation diagram with the rise in EC of the production of the lower layer.

The installation (see Fig. 1) contains a column of elevator pipes 1 connected to a cylinder 2, in which the plunger 3 moves with the main discharge valve 4, driven by rods 5, interacting with a separation piston 6, which is connected by an extension 7 to an additional separation piston 8. A limiter 9 is installed on the extension cord 7. Cylinder 2 is connected to an additional cylinder 11 by means of a housing 10 having an inner diameter larger than that of cylinder 2, in the lower part of which the main suction valve 12 is located. In the additional section The internal piston 8 is provided with an internal channel 13 with an additional pressure valve 14, which communicates the space under the piston 8 with the cavity of the housing 10, and the cavity of the housing 10 is communicated with an opening 15 with the annular space 16 formed by EC 17 and lift pipes 1. Outside, cylinders 2 and 11 and the housing 10 are enclosed by a casing 18 with the formation of an annular space 19 communicating an opening 20 in the cylinder 2 with a channel 21 of the shank 22, which through an additional suction valve 23 communicates with the space of the well 24 below the lower packer 25, communicated with the lower plate stomas 26. The main valve 12 communicates the suction channel 27 of the shank 22 with the space between the lower 25 and upper packer 28, which, in turn, communicated with the upper reservoir 29.

In FIG. 2 shows the installation flow chart when the channel 21 of the shank 22 is in communication with the upper formation 29 through the space between the packers 25 and 28, and the channel 27 with the lower formation 26 through the space of the well 24 below the lower packer 25.

The installation works as follows.

When the plunger 3 (Fig. 1), driven by the rods 5, moves upward, the separation piston 6 along with the extension 7 and the additional separation piston 8 moves upward from the bottom dead center, both pressure valves — the main 4 and the additional 14 — are closed. In this case, the plunger 3 displaces the liquid from the cylinder 2 into the lift pipes 1 to the mouth (Fig. Not shown), and the additional separation piston 8 is sucked into the cavity of the additional cylinder 11 through the main suction valve 12, channel 27, the space between the packers 28 and 25 is liquid from the upper layer 29.

When the upper end of the separation piston 6 reaches the hole 20 in the cylinder 2, the stop 9 stops the further movement of the separation pistons 6 and 8. Then, to the highest dead center, the plunger 3 draws in through the hole 20, the annular space 19 formed by the casing 18 and the outer surface of the cylinders 2 and 11 and the housing 10, the channel 21 in the liner 22, an additional suction valve 23, the space of the well 24 under the lower packer 25 products from the lower reservoir 26.

After reaching the top dead center, the plunger 3 under the action of the rods 5 moves down. The liquid in the cylinder 2 from the lower layer 26 flows through the open main discharge valve 4 into the cavity of the lift pipes 1.

When the plunger 3 reaches the upper end of the separation piston 6, the latter also moves downward under the action of the plunger 3 together with the extension 7 and the additional separation piston 8. In this case, the main suction valve 12 closes and the liquid in the cylinder 11 is displaced from the upper layer 29 through the additional discharge valve 14, the inner channel 13, the cavity of the housing 10, the hole 15 into the annulus 16 formed by the lift pipes 1, the casing 18, the shank 22 on one side and the EC on the other. Further along the annular space 16, the fluid moves to the wellhead and into the collection system (not shown in the drawing).

The installation of FIG. 2 works in exactly the same way, only through the channel 21 of the liner 22 and further into the elevator pipes 1 does the production of the upper layer 29 enter, and through the channel 27 of the liner 22 and further into the annular space 16 do the products of the lower layer 26.

Thus, the proposed installation allows you to separately raise the products of two layers. Thanks to the placement of an additional suction valve in the vicinity of the liner, the implementation of an annular channel communicating with the hole in the cylinder, the placement of an additional channel inside the additional separation piston, it was possible to reduce the transverse dimensions of the pump and to develop an installation for a small diameter well, for example, with a diameter of 114 mm, with all the above features and capabilities. In addition, the installation can also be used in wells with traditional EC sizes (146, 168 and 178 mm) when using large diameter pumps (57.2; 69.9; 95.3 mm).

Claims (1)

Installation for simultaneous and separate operation of two layers, including a column of elevator pipes, upper and lower packers installed above the corresponding layers, a liner with channels, a rod column and a sucker rod pump with an additional suction valve connected by an outlet with an opening in the cylinder wall, a hollow body with a side a hole in communication with the annular space, the main suction valve in the lower part and a separation piston located below the hole for the additional suction valve in the cylinder f with the possibility of limited longitudinal movement down into the cavity of the body and up under the influence of the plunger, an additional discharge valve passing from the cavity of the body through the side hole into the annulus, while the main and additional suction valves are communicated by channels located in the shank, with one of the layers, not communicated with the other channel, and the plunger cavity is in communication with the lift pipes, characterized in that the additional suction valve is in communication with the bore annular a device formed by a casing covering the outside of the lower part of the cylinder with an opening and a housing that is provided with an additional cylinder below and below the side opening, and the separation piston is equipped with an additional piston for the additional cylinder and an internal channel communicating the under-piston space of the additional cylinder with the internal cavity of the housing, this additional discharge valve is installed in the inner channel of the separation piston.

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