RU2546685C2 - Downhole plant for simultaneous-separate operation of two beds of single well (versions) - Google Patents

Abstract

FIELD: oil-and-gas industry.

SUBSTANCE: in compliance with first version, this plant comprises tubing, parker separating the top and bottom beds, Downhole two-way motor tightly connected with electric cable. Said motor is coupled by driven shafts with top and bottom rotary pumps. Top rotary pump is connected from below with intake module provided with lateral fluid intake channels and bottom rotary pump with outlet connected with said tubing. Parker barrel is connected from below by shank with filter to intake fluid from bottom seam and from above with bottom rotary pump inlet. The latter is provided with outlet module connected to Downhole motor bottom. Outlet module houses lower drive shaft and downhole motor hydraulic protection device. Intake module of top rotary pump is provided with extra well filter and connected to downhole motor from above. Inlet module houses upper drive shaft and downhole motor hydraulic protection device. Top rotary pump features output equal, at least, to total capacity of both well seams at equal rpm of motor shafts. Upper rotary pump comprises several sections to up fluid lift pressure in aforesaid tubing. In compliance with second version, downhole motor is additionally provided with jacket connected from above with upper pump- intake module to make the motor cooling chamber with fluid feed from below from behind-the-packer annulus and discharge via lateral channels of intake modulus to upper rotary pump.

EFFECT: higher reliability.

4 cl, 2 dwg

Description

The group of inventions relates to the field of mining, in particular to the oil industry, and can be used for simultaneous and separate production of borehole fluid from two reservoirs by one well.

A known installation for simultaneous and separate operation of two layers, including sections of a centrifugal pump, a submersible motor, hydraulic protection, a receiving module, a receiving pipe with a packer. Below the submersible electric motor there are additional sections of hydraulic protection and a centrifugal pump with a central fluid inlet through the inlet pipe and a liquid outlet channel into the annulus of the well in its upper part and articulated with a receiving pipe in the lower part (Patent RU No. 69146 U1 for utility model. Installation for both separate operation of two layers. - IPC: E21B 43/14. - Publish. 10.12.2007).

A known installation of an electric centrifugal pump for simultaneous and separate operation of oil wells, including an electric centrifugal pump with an additional lower section of the impellers, two hydraulic protections, a packer, a pipe passing through the packer and ending in the upper part of the cylinder of the sliding connector, a pipe fixed to the bottom of the installation and ending with a passage slide plug plunger. At the upper end of the cylinder of the sliding connector, a replaceable funnel with a conical socket and a pipe with internal right-hand thread in the lower part and left-hand thread in the upper part is installed. (Patent RU No. 120461 U1 for utility model. Installation of an electric centrifugal pump for simultaneous separate operation of oil wells. - IPC: E21B 43/14. - Published on 09/20/2012).

A known installation of an electric centrifugal pump for simultaneous and separate operation of a well, including an electric centrifugal pump with an additional section of impellers, two hydraulic shields located on both sides of the submersible electric motor, a pipe with a bore plug fixed to the bottom of the engine, a pipe with a cylinder passing through the packer, a funnel with right and left-hand threads, a telemetry system unit fixed to the bottom of the submersible motor, a downhole device coupled to the telemetry system unit th hollow and arranged between the submersible motor and seal section. The downhole tool is located under the additional impeller section and is connected to the telemetry system unit by a cable running along the outside of the pipe. (Patent RU No. 129144 U1 for utility model. Installation of an electric centrifugal pump for simultaneous and separate well operation. - IPC: E21B 43/14, E21B 47/00, F04B 47/06. - Publish. 06/20/2013).

The closest analogue of the claimed invention is a submersible pump installation containing a submersible two-sided electric motor, an upper and lower hydraulic protection and two centrifugal pumps with input modules, a submersible flow meter and a liner equipped with a packer above the oil reservoir and a downhole filter suspended on a tubing string below the aquifer; . The tubing string opposite the aquifer is covered with a round brush (Patent RU No. 132836 U1 for utility model. Submersible pumping unit. - IPC: E21B 43/14. - Publish. 09/27/2013). This utility model is taken as a prototype.

A disadvantage of the known installations is the low operating efficiency of a two-layer well due to the complexity of the design of the installations.

The main task, the solution of which the claimed invention is directed, is to increase the efficiency of well operation by simplifying the design and increasing the reliability of the installation.

The technical result is to simplify the design and increase the reliability of the installation during operation of wells.

The specified technical result is achieved by the fact that in the well-known deep pump installation for simultaneous and separate operation of two layers with one well, according to the first embodiment, containing a string of lift pipes, a packer disconnecting the upper and lower layers in the well, a submersible two-sided motor with hydraulic protection on both sides, which drive shafts connected to the upper and lower centrifugal pumps, the upper of which is connected to the bottom with a receiving module made with side channels for fluid inlet from the upper Asta and the lower centrifugal pump, and communicating with the output from the column of elevator pipes, an electric cable hermetically connected to the electric motor, and a shank, according to the proposed technical solution

the bottom of the packer barrel is connected to the bottom of the shank, equipped with a filter for receiving fluid from the lower reservoir, and on top to the inlet to the lower centrifugal pump, the latter is equipped with an output module with side channels for fluid exit into the over-packer annular space, docked to the bottom of the submersible motor, and inside the output module the lower drive shaft and the hydraulic protection device of the submersible motor are placed, while the receiving module of the upper centrifugal pump is additionally equipped with a downhole filter and docked to gruzhnomu motor from above and inside the receiving module has upper drive shaft and apparatus hydroprotection submersible motor, wherein the upper centrifugal pump is selected with a capacity at least equal to the total output of both the well layers at equal rotational speed of the drive motor shaft;

the upper centrifugal pump contains several sections with the possibility of successively increasing the pressure of the liquid to lift it along the column of elevator pipes.

The specified technical result is achieved by the fact that in the well-known deep-pump installation for simultaneous and separate operation of two layers with one well, according to the second embodiment, it contains a column of lift pipes, a packer disconnecting the upper and lower layers in the well, a submersible two-sided motor with hydraulic protection on both sides, which are driven shafts connected to the upper and lower centrifugal pumps, the upper of which is connected to the bottom with a receiving module made with side channels of fluid inlet from the upper hundred and bottom of the centrifugal pump and in communication with the column outlet tubing, electric cable, is hermetically connected to the motor, and a shank, according to the proposed technical solution

the bottom of the packer barrel is connected to the bottom of the shank, equipped with a filter for receiving fluid from the lower reservoir, and on top to the inlet to the lower centrifugal pump, which is equipped with an output module with side channels for fluid exit into the over-packer annular space, docked to the bottom of the submersible motor, and inside the output module the lower drive shaft and the hydraulic protection device of the submersible motor are placed, the latter is additionally equipped with a casing connected from above to the receiving module of the upper centrifugal pump and an image a flow-through chamber for cooling the electric motor with liquid inlet from the bottom of the above-packer annular space above the side channels of the output module of the lower centrifugal pump and exit through the side channels of the receiving module to the upper centrifugal pump, while the receiving module is additionally equipped with a downhole filter and docked to the upper end of the submersible motor, and inside the receiving module are the upper drive shaft and the hydroprotection device of the submersible motor, the upper centrifugal pump selected with a productivity of at least equal to the total flow rate of both layers of the well with an equal frequency of rotation of the drive shafts of the electric motor;

the upper centrifugal pump contains several sections with the possibility of successively increasing the pressure of the liquid to lift it along the column of elevator pipes.

The analysis of the prior art by the applicant has made it possible to establish that there are no analogues that are characterized by sets of features that are identical to all the features of the claimed options for a deep-well pumping unit for simultaneous and separate operation of two layers in one well. Therefore, each of the claimed technical solutions meets the condition of patentability "novelty."

The search results for known solutions in the art in order to identify features that match the distinctive features of the prototypes of each of the proposed options for technical solutions have shown that they do not follow explicitly from the prior art. From the prior art determined by the applicant, the influence of the provided for by essential features each of the claimed variants of technical solutions of the transformations on the achievement of the specified technical result is not known. Therefore, each of the variants of the claimed technical solutions meets the condition of patentability "inventive step".

The claimed technical solution options can be implemented at any engineering enterprise using the adopted technology from well-known materials and used in oil wells. Therefore, the claimed options for technical solutions meet the condition of patentability "industrial applicability".

In the present application for the grant of a patent, the requirement of the unity of the invention is met, since the options for a deep pump installation for simultaneous and separate operation of two layers in one well are designed for simultaneous and separate operation of oil. The claimed technical solutions solve the same problem - improving the reliability of the installation during operation of wells.

Figure 1 shows the layout of the deep well pumping unit for simultaneous and separate operation of two layers of one well, option 1; figure 2 is the same, with a casing for cooling the electric motor, option 2.

The downhole pump installation according to the first embodiment comprises a column of lift pipes 1, a packer 2, uncoupling the upper I and lower II layers in the well 3, a submersible two-sided electric motor 4, hermetically connected to the electric cable 5. Submersible two-sided electric motor 4 with drive shafts 6 and 7 on both sides connected to the upper 8 and lower 9 centrifugal pumps, respectively. The upper centrifugal pump 8 is connected from below to the receiving module 10, which communicates with the output of the column of elevator pipes 1. The receiving module 10 is made with side channels 11 of the fluid inlet from the upper layer / and from the side channels 12 of the output module 13, docked to the bottom of the submersible motor 4, through nadpakerny annular space 14, on the one hand, and, on the other, to the lower centrifugal pump 9. The trunk 15 of the packer 2 is connected to the bottom 16 of the shank 16, equipped with a filter for receiving fluid from the lower reservoir II, and from the top to the entrance to the lower centrob 9. The pump is inside the output module 13 has the lower drive shaft 7 and the seal section 17 of the submersible device motor 4. The receiving unit 9 of the upper centrifugal pump 8 is further provided with a downhole filter and docked to the submersible motor 4 from above. Inside the receiving module 10, the upper drive shaft 6 and the hydraulic protection device 18 of the submersible motor 4 are placed. The upper centrifugal pump 8 is selected with a capacity of at least equal to the total flow rate of the upper I and lower II layers of the borehole at an equal speed of the drive shafts 6 and 7 of the electric motor 4 , and contains several sections with the possibility of successively increasing the pressure of the liquid to lift it along the column of elevator pipes (Figure 1).

According to the second option, in the downhole pump installation, the submersible two-sided electric motor 4 with the hydraulic protection devices 17 and 18 on both sides is additionally equipped with a casing 19 connected from above to the receiving module 10 of the upper centrifugal pump 8 and forming a flow chamber 20 for cooling the electric motor 4 with a liquid inlet from below annular space 14 above the side channels 12 of the output module 13 of the lower centrifugal pump 9 and the output through the side channels 11 of the receiving module 10 of the upper centrifugal pump 8 (Figure 2).

The proposed options for the deep pump installation are as follows.

The downhole pump assembly is assembled into the wellbore 3 on the string of elevator pipes 1 from the wellhead 3 until the packer 2 is installed above the lower formation I until the upper I and lower II layers of the well 3 are separated in a certain interval of the well 3. After the packer 2 is fixed in the well 3 from the wellhead 3 through cable 5 include a submersible two-sided electric motor 4, the latter by unidirectional rotation of the drive shafts 6 and 7 on both sides drives the upper 8 and lower 9 centrifugal pumps, respectively.

With depression of the upper reservoir I, the first option of a deep pump installation is used. In this case, the borehole fluid from the lower reservoir II through the liner 16 with a receiving filter and the cavity of the barrel 15 of the packer 2 enters the lower centrifugal pump 9, the last fluid is pumped into the output module 13. Then, through the side channels 12 of the output module 13 and the over-pipe annular space 14 enters the side channels 11 of the receiving module 10 and, washing with its own flow, cools the electric motor 4. At the same time, the liquid from the upper layer I through the overpacker annular space 14 also enters the side channels 11 of the receiving module 10, the last upper centrifugal pump 8, wellbore fluid is pumped under pressure through the column of tubing 1 at the well surface 3.

With a low flow rate of the lower reservoir II, the second version of the deep pump installation is used. In this case, the borehole fluid from the upper formation I through the over-packer annular space 14 also enters the chamber 20 formed by the casing 19 and into the side channels 11 of the receiving module 10, washing with its own flow, cools the electric motor 4. At the same time, the fluid from the lower formation II through the shank 16 with a receiving filter and the cavity of the barrel 15 of the packer 2 enters the lower centrifugal pump 9, the last liquid is pumped into the output module 13. Then, through the side channels 12 of the output module 13 and the above-pack annular space 14, the liquid blunts into the chamber 20 and further into the lateral channels 11 of the receiving module 10, from the latter by the upper centrifugal pump 8, the well fluid under pressure is pumped along the string of elevator pipes 1 to the surface of the well 3.

The use of the proposed deep pump installation will significantly increase the efficiency of well operation by increasing the reliability of the installation in accordance with the requirements of the Rules for the Protection of Subsurface Resources approved by the Decree of the Gosgortekhnadzor of the Russian Federation No. 71 dated June 06, 2003.

Claims (4)

1. A deep pump installation for simultaneous and separate operation of two layers in one well, comprising a string of lift pipes, a packer disconnecting the upper and lower layers in the well, a submersible two-sided motor with hydraulic protection on both sides, which is connected by drive shafts to the upper and lower centrifugal pumps, the upper of which is connected from below to a receiving module made with side channels of fluid inlet from the upper reservoir and the lower centrifugal pump, and communicating with the output from the column of elevator pipes , an electric cable hermetically connected to the electric motor, and a shank, characterized in that the packer barrel is connected from below to a shank equipped with a filter for receiving fluid from the lower layer, and from above to the entrance to the lower centrifugal pump, the latter having an output module with side output channels liquid into the over-pack annular space docked to the bottom of the submersible electric motor, and the lower drive shaft and the hydraulic protection device of the submersible electric motor are placed inside the output module, while The upper centrifugal pump’s intake module is additionally equipped with a downhole filter and docked to the submersible electric motor from above, and the upper drive shaft and the hydraulic protection device of the submersible electric motor are placed inside the receiving module, and the upper centrifugal pump is selected with a capacity of at least equal to the total flow rate of both well strata with equal frequency of rotation of the drive shafts of the electric motor. 2. The deep pump installation according to claim 1, characterized in that the upper centrifugal pump contains several sections with the possibility of successively increasing the pressure of the liquid to lift it along the column of elevator pipes. 3. A deep-pump installation for simultaneous and separate operation of two layers in one well, comprising a string of lift pipes, a packer disconnecting the upper and lower layers in the well, a submersible two-sided motor with hydraulic protection on both sides, which is connected by drive shafts to the upper and lower centrifugal pumps, the upper of which is connected from below to a receiving module made with side channels of fluid inlet from the upper reservoir and the lower centrifugal pump, and communicating with the output from the column of elevator pipes , an electric cable hermetically connected to the electric motor, and a shank, characterized in that the packer barrel is connected from below to a shank equipped with a filter for receiving fluid from the lower layer, and from above to the entrance to the lower centrifugal pump, which is equipped with an output module with side output channels liquid into the above-pack annular annulus docked to the bottom of the submersible electric motor, and the lower drive shaft and the hydraulic protection device of the submersible electric motor are placed inside the output module, the last additional It is additionally equipped with a casing connected from above to the receiving module of the upper centrifugal pump and forming a flow chamber for cooling the electric motor with liquid inlet from the bottom of the above-pack annular space above the side channels of the output module of the lower centrifugal pump and output through the side channels of the receiving module to the upper centrifugal pump, while the receiving module additionally equipped with a downhole filter and docked to the upper end of the submersible motor, and inside the receiving module the upper a drive shaft and a hydroprotection device for the submersible electric motor, the upper centrifugal pump being selected with a capacity of at least equal to the total flow rate of both layers of the borehole at an equal speed of rotation of the electric motor drive shafts. 4. The deep pump installation according to claim 3, characterized in that the upper centrifugal pump contains several sections with the possibility of successively increasing the pressure of the liquid to lift it along the column of elevator pipes.

Images