RU79615U1 - SUBMERSIBLE PUMPING SYSTEM FOR OIL PRODUCTION WITH A HIGH GAS FACTOR (OPTIONS) - Google Patents

Abstract

The pump system is used in submersible installations for oil production in wells with high annular pressure. The submersible pump system comprises a production pump (1) and a jet device in the form of a string pump (2). The production pump (1) and the jet pump (2) located above the production pump (1) are lowered into the well on a pipe string (3). The jet pump (2) is installed permanently. The pressure of the production pump 1 is chosen such that it has a pressure head to ensure the operation of the jet pump (2). The jet pump (2) is equipped with nozzles of high (7) and low (8) pressure. Between the nozzles of high (7) and low (8) pressure, a plug (12) (Option 1) or a sleeve (13) with a calibrated axial bore (14) (Option 2) with the possibility of changing the volume of produced fluid is installed. The presence of a plug (12) determines the smallest volume of produced fluid, and its absence the largest volume of produced fluid (Option 1). A sleeve (13) with a calibrated axial hole (14) changes the volume of the produced fluid in the direction of increase or decrease, depending on the diameter of the hole (Option 2). The technical solution allows to improve the operating mode of the system with a high gas factor, to protect equipment from gas, to simplify the layout of the immersion system, to increase its reliability, 2 N.Z. f-ly, 3 ill.

Description

The utility model relates to the oil and gas industry and can be used in submersible installations for oil production in wells with high annular pressure.

Known submersible pump installation containing a submersible pump, a submersible motor with hydroprotection, gas separator, dispersant, RU No. 2232301 C1, F04D 13/10, ЕВВ 43/38, 2004.07.10; RU No. 2027912 C1, F04D 13/10, ЕВВ 43/38, 1995.01.27.

A known method of controlling the operation of a pump installation in a well, which consists in measuring and maintaining pressure values at a centrifugal pump intake and in a discharge line and in regulating the pump drive speed, RU No. 2016252 C1, F04D 15/00, F04D 13/10, Е21В 43 / 00, 1994.07.15.

A known method of controlling the operating mode of a well with an electric pumping unit, including controlling the speed of the electric motor by changing the frequency of the supply network, measuring and recording the technological parameters of the well and setting the specified mode of its operation, RU No. 2299973 C1, ЕВВ 43/00, F04D 15/00, 2007.05 .27, RU No. 2298645 C2, E21B 43/20, 2007.05.10.

A known method of regulating the performance of the installation of an electric centrifugal pump, by periodically turning it on and off, RU No. 2287670 C2, EV 43/12, 2006.11.20.

Known pump-ejector system for oil production, containing a jet apparatus lowered into the well, a production pump, gas separator, RU No. 2238443 C1, F04F 5/54, ЕВВ 43/40, 2004.10.20.

Known pump-ejector system for oil production, containing a production pump and a jet device with nozzles located above the production pump, lowered into the well on a pipe string, RU No. 2295631 C1, E21B 43/00, F04F 5/54, 2007.03.20.

This technical solution was adopted as the "closest analogue" of this utility model.

In the pump-ejector system of the “closest analogue”, an inkjet device, in the presence of a fixing collet and a landing seat, can be placed at various depths of the well depending on the productivity of the installation, which expands its scope, but complicates the design and operation.

The present utility model is based on the solution of a problem that allows to improve the operating mode of the system with a high gas factor, protect equipment from gas, simplify the layout of the immersion system, and increase its reliability.

According to the utility model (Options 1 and 2), this problem is solved due to the fact that the submersible pump system contains a production pump and a jet device with nozzles located above the production pump, lowered into the well on a pipe string.

Option 1.

The jet device in the form of a jet pump contains a plug placed between the nozzles of high and low pressure, with the possibility of changing the volume of the produced fluid, while the jet pump is stationary on the pipe string when the system is operating.

Option 2

An inkjet device in the form of a jet pump contains a sleeve with a calibrated axial bore located between the high and low pressure nozzles, with the possibility of changing the volume of produced fluid, while the jet pump is stationary on the pipe string when the system is operating.

The applicant has not identified sources containing information about the technical solution that is identical to the characteristics given in the formula of this utility model, this determines, according to the applicant, the utility model meets the criterion of “novelty”.

The essence of the utility model is illustrated by drawings, which depict:

figure 1 - Pumping system, schematically. Option 1 and Option 2.

figure 2 - Jet pump, section. Option 1.

figure 3 - Jet pump, section. Option 2

The pumping system includes:

Mining pump - 1.

Jet pump - 2.

Pipe string (for pumps 1 and 2) - 3.

The jet pump contains:

Lower case - 4.

Upper case - 5.

The clip (between buildings 4 and 5) - 6.

High pressure nozzle (in clip 6) - 7.

Low pressure nozzle (in clip 6) - 8.

Oil supply zone - 9.

The gas-liquid mixture zone is 10.

Discharge zone - 11.

Option 1.

Stub - 12.

Option 2

Sleeve - 13,

calibrated axial bore (bushings 13) - 14.

The jet pump 2 is placed above the production pump 1. The jet 2 and production 1 pumps are lowered into the well on the pipe string 1.

When the submersible pump system is operating, the jet pump 2 is installed on the pipe string 3 stationary.

In the string pump 2, between the nozzles of high 7 and low 8 pressure is placed a plug 12. The presence of a plug 12 determines the smallest volume of produced fluid (Option 1).

A sleeve 13 with a calibrated axial hole 14 is located in the string pump 2 between the nozzles of high 7 and low 8. The sleeve 13 with the calibrated axial hole 14 changes the volume of produced fluid in the direction of increase or decrease, depending on the diameter of the hole (Option 2).

The choice of blind plug 12, its absence or installation of the sleeve 13 with a specific hole 14 in the jet pump 2 according to option 1 or option 2 depends on the performance of the production pump 1.

Submersible pumping system operates as follows.

With an appropriate debit for each oil well determine the productivity of the production pump 1.

For production pump 1, depending on its performance, a jet pump 2 is used in the pumping system, with a plug 12 installed (Option 1), or with a sleeve 13 installed in it with a calibrated axial hole 14 of the desired diameter (Option 2).

The head of the production pump 1 is selected so that it has a pressure head to ensure the operation of the jet pump 2.

Choose the location of the jet pump 2 so that when the production pump 1 is located above the dynamic level of the produced fluid.

After starting the production pump 1, oil rises into the supply zone 9 and passes through the jet pump 2. Two pumps 1 and 2 simultaneously pump the produced fluid from the well.

When the static level of the produced fluid goes into the dynamic, the jet pump 2 pumps out the gas simultaneously with the producing pump 1 pumping out the oil.

The pump system to the jet pump 2 carries out the extraction of oil by mechanical means.

The pump system above the jet pump 2 produces oil by the gas-lift method.

The gas pumped out by the jet pump 2 from the discharge zone 11 will bubble upward towards the mouth, while the specific gravity of the liquid lifted by the production pump 1 will decrease. Changing the specific gravity of the produced fluid in the gas-liquid zone 10 (above the jet pump 1) reduces the load on the producing pump 1 by lifting the liquid and compensates for the power consumption for the operation of the jet pump 1. This ensures constant pumping of gas from the annulus.

The pump system is designed for oil production with a large gas factor, when during the discharge, which creates the extraction pump 1, the gas is degassed and free gas rushes through the annulus to the wellhead. In the event of a check valve failure (not shown) at the mouth (especially in winter), gas is not discharged to the linear oil pipeline, the cap grows and reaches the producing

pump 1, which burns out, or there is an intensive discharge of gas, which blocks the operation of production pump 1 with a bubble.

The proposed pump system provides reliable evacuation of gas from the annulus and protects the production pump 1 from its effects.

The design of the jet pump 2 with the ability to change the volume of produced fluid, determined by the performance of the producing pump 2, improves the operation of the system.

The implementation of the jet pump 2 with a plug 12 (Option 1) or with a sleeve 13 with a calibrated axial bore 14 (Option 2) allows the same number of nozzles to use the production pump 1 with different capacities in the direction of decreasing or increasing it, respectively.

The installation of the jet pump 2 (above the production pump 1) is stationary and the absence of devices requiring their reinstallation during oil production simplifies the layout of the pump system, thereby increasing reliability.

The proposed submersible pumping unit was manufactured industrially at the Izmeron plant and the pilot tests determine, according to the applicant, its compliance with the criterion of “industrial applicability”.

Claims (2)

1. Submersible pumping system containing a production pump and a jet device with nozzles located above the production pump, lowered into the well on a pipe string, characterized in that the jet device in the form of a jet pump contains a plug placed between the nozzles of high and low pressure, with the possibility changes in the volume of produced fluid, while the jet pump during operation of the system is stationary on the pipe string. 2. Submersible pump system containing a production pump and a jet device with nozzles located above the production pump, lowered into the well on a pipe string, characterized in that the jet device in the form of a jet pump contains a sleeve with a calibrated axial hole located between the high and low nozzles pressure, with the possibility of changing the volume of produced fluid, while the jet pump during operation of the system is placed on a pipe string stationary.