RU129144U1 - INSTALLING ELECTRIC CENTRIFUGAL PUMP FOR SIMULTANEOUS-SEPARATE OPERATION OF A WELL - Google Patents

Abstract

Installation of an electric centrifugal pump for simultaneous and separate operation of the 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 on the right and left-handed threads, a telemetry system unit fixed to the bottom of a submersible motor, a downhole tool coupled to a telemetry system unit, characterized in the telemetry system unit configured hollow, is arranged between the submersible motor and seal section, and the depth device disposed below the additional section of the impeller, in communication with the telemetry system unit cable extending along the outer side of the pipe.

Description

The proposed utility model relates to the oil industry and can be used in oil production in deposits with significant differences in reservoir parameters. In case of simultaneous and separate operation of a well equipped with an electric centrifugal pump (ESP), it is necessary to separately account for the production rate of each formation, water cut of liquids, bottomhole and formation pressures of both layers.

It is known that for simultaneous and separate operation of a well (ORE) with ESP, installations are used in which the selection of the bottom formation products is performed by the pump intake pipe passing through the packer / 1 /. The receiving pipe has a telescopic connector to prevent stresses on the pump housing when the packer is planted and equipment is in operation. The disadvantage of the operation of the devices is the lack of the possibility of separate accounting of formation products.

It is known that to monitor the operation of the ESP and to measure the pressure at the pump inlet, telemetry systems (TMS) are used, installed on the bottom of the submersible electric motor (SEM) and transmitting information to the surface through the power cable of the unit / 2 /. From the bottom, a depth device can be connected to the TMS unit with the transmission of information (pressure at the reception of the lower section of the impellers, flow rate of the lower layer, moisture content of the product) to the surface through the TMS through the power cable of the ESP. The use of TMS does not allow receiving and transmitting complete information to the surface during simultaneous and separate oil production from two layers. First of all, this concerns the separate measurement of production rates and water cuts.

The closest and proposed utility model is the installation of an electric centrifugal pump for simultaneous - separate operation of wells / 3 /.

The installation includes an additional lower section of the impellers, two hydraulic protections, a packer, a nozzle passing through the packer and ending in the upper part of the cylinder of the sliding connector with a pipe fixed to the bottom of the installation and ending with a passage ram of the sliding connector. A funnel is made in the sliding connector with internal right-hand thread in the lower part and left-hand thread in the upper part. The installation allows pumping out the oil of the lower reservoir with an additional section of the impellers in the over-packer region of the well, where it mixes with the oil of the upper reservoir at the pump intake. The installation does not allow measurements of the parameters of the lower reservoir, as well as the use of a telemetry system to monitor the operation of a submersible electric motor.

The purpose of the utility model is to measure the parameters of the lower layer and the submersible motor.

This goal is achieved by the fact that in the known device, including an electric centrifugal pump with an additional section of the impellers, two hydraulic shields located on both sides of the submersible electric motor, a pipe with a bore plunger fixed to the bottom of the engine, a pipe with a cylinder passing through the packer, a funnel on the right and left-handed threads, a telemetry system unit fixed to the bottom of a submersible motor, a downhole device coupled to a telemetry system unit, according to a utility model, a telemetry unit the system is made hollow, placed between the submersible motor and the hydraulic protection, and the downhole device located under the additional section of the impellers is in communication with the telemetry system unit with a cable running along the outside of the pipe.

In FIG. shows a diagram of the proposed utility model. An electric centrifugal pump 3 with a submersible motor 4 and a receiving module 5 was lowered into the well 1 on the tubing string 2. The motor 4 is driven through the power cable 6. Hydroprotection 7 and 8 are located on both sides of the electric motor. block 9 of the telemetry system. The motor shaft 10 passing through the block 9 and the hydroprotection 8 drives the lower section of the impellers 11. The lower stage housing in the upper part has openings 12 for output of the lower formation 13 into the overpacker space of the well. The packer 14, through which the receiving pipe 15 passes with a cylinder 16 at the upper end, divides the lower layer 13 from the upper 17. The pipe 18 with a passage plunger 19 at the lower end is fixed to the housing 11 of the lower section. A downhole device 20 is placed in the pipe 18, which is connected via cable 21 to the telemetry system unit 9. An opening was made in the housing of the unit for communicating unit 9 with the above-packer region of the well.

The operation of the installation is as follows. First, in the well 1, a packer 14 is installed with a receiving pipe 15 and a cylinder 16 at the end. Next, the installation of an electric centrifugal pump 3 with a pipe 18 and a plunger 19 at the end is lowered into the well. The plunger 19 enters the cylinder 16 and forms a sliding connector to reduce the load on the pump housing during its descent, operation and subsequent lifting. After starting the pump into operation, the products of the lower layer 13 through the pipe 15, the pipe 18 will be received by the lower section of the impellers 11 and through the holes 12 to enter the over-packer space of the well. At the same time, the products of the upper formation 17 will enter the well and, together with the products of the lower formation 13, will enter the receiving module 5. The downhole tool 20 will record the parameters of the lower formation (production rate, oil moisture content, pressure at the intake of the lower section 11 of the pump). Telemetry system unit 9 will record the pressure in the above-packer space, as well as the operating parameters of the submersible motor 4 (oil pressure, temperature, vibration level and insulation resistance). On the surface, by subtracting the operating parameters of the lower reservoir, the parameters of the upper reservoir are calculated.

Installation using pressure records by the device 20 and block 9 allows you to calculate the bottomhole pressure of the strata 13 and 17, as well as to obtain pressure recovery curves at well stops. The technical and economic advantage of the utility model is the possibility of separate monitoring of the operation of both layers, as well as the operation parameters of a submersible electric motor using a telemetry system.

Literature

1. RF patent No. 120704 for utility model. Installation of an electric centrifugal pump for simultaneous and separate oil production from two layers (options). Claim 05/21/2012. Publ. 09/27/2012. Bi number 27.

2. Lepikhin V.I., Vidyakin N.G., Valeev A.S. and other JSC "Electon": development and operational experience of a complex of equipment for the automation of oil production. / Oil industry. M .: 2004. - No. 5.- p. 111-112.

3. RF patent No. 120461 for a utility model. Installation of an electric centrifugal pump for simultaneous and separate operation of oil wells. Claim 04/10/2012. Publ. 09/20/2012. Bi number 26.

Claims (1)

Installation of an electric centrifugal pump for simultaneous and separate operation of the 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 on the right and left-handed threads, a telemetry system unit fixed to the bottom of a submersible motor, a downhole device coupled to a telemetry system unit, characterized in the telemetry system unit configured hollow, is arranged between the submersible motor and seal section, and the depth device disposed below the additional section of the impeller, in communication with the telemetry system unit cable extending along the outer side of the pipe.

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