RU144477U1 - PUMPING SYSTEM FOR SIMULTANEOUS PRODUCTION FROM TWO LAYERS - Google Patents

Abstract

A pump installation for extracting fluid from two layers within the same well, consisting of a packer, flow meter, lower unit, cable line, switching unit, upper unit, tubing, characterized in that an immersion flow meter is attached to the lower unit, and the unit itself made according to an inverted circuit, and the pump is located below the engine, and the power of both units is provided on one cable through a switch, providing the ability to set the operating modes of both units independently.

Description

The invention relates to the oil industry and can be used for simultaneous production of fluid from two layers within the same well.

Known pumping unit used to extract fluid from a side wellbore, consisting of a two-sided submersible motor with upper and lower hydraulic protections, a retainer and a main pump, a liner lowered into the production string of the side trunk to the level of the perforation interval and connected to the intake of the booster pump, compressor pipes. The installation is characterized in that a sub is installed in the upper part of the shank, the lower end of which is made in the form of a cone, which ensures that the sub fits into the funnel connecting the production cores of the main and side shafts, while the outer diameter of the upper part of the sub is larger than the inner diameter of the side shaft production casing. (RF patent №112935, BPM No. 20.10.2011)

The use of this installation is possible only for production from one side wellbore, and does not allow production from two layers.

Known submersible rodless electric pump for the joint and separate operation of two oil reservoirs, containing the upper module section of the pump with a differential attachment-dispersant with receiving channels and an engine with hydraulic protection, characterized in that it is additionally equipped with lower hydraulic protection, the lower module section containing discharge channels, a differential attachment with a dispersant with receiving channels, a shank having a receiving channel, as well as a packer with couplings and a centralizer. (RF Patent No. 115420, BPM No. 08.12.2011).

This method does not allow you to adjust the production volumes of each layer separately, due to the use of one engine rigidly connected with two pumps.

Closest to the problem to be solved is "Installation of a borehole sucker rod pump with a double-acting pump" containing a casing string with two exposed layers, a pump running on a pipe string located in the casing with the formation of an annulus between them, which is separated by a packer located between the opened layers moreover, the pump is equipped with a plunger, pressure valve and piston, made with the possibility of reciprocating movement, the upper and lower inlet openings from the suction with valves located above the packer and, respectively, above and below the piston, while the pump outlet from above via a pipe string is communicated through a discharge valve with a flow line of the wellhead, and from below through a lower discharge valve with a sub-packer space, while the piston is made free to interact above with a plunger and limited reciprocating movement, and the plunger below equipped with a rod inserted into the piston with the possibility of limited reciprocating movement and I. (Patent RU 2364708, IPC E21B 43/00, ЕВВ 43/38, publ. Bulletin 23 of 08/20/2009).

A disadvantage of the known installation is the inability to control the volume of production from the reservoir.

The objective of the invention is to increase the operating efficiency of each oil reservoir individually within the same well and save on the construction of additional wells and maintenance of submersible plants.

This problem is solved by applying a method of extracting fluid from two reservoirs within the same well, which includes taking fluid from the lower reservoir and injecting fluid into the annulus above the packer, and injecting tubing into the pipe space as fluid raised from under the packer and fluid from the upper reservoir.

A pumping unit for extracting fluid from two layers within the same well consists of a packer, a flowmeter, a lower pumping unit, a cable line, a switching unit, an upper pumping unit, and tubing. It differs in that a submersible flow meter is docked to the lower pump unit, and the unit itself is made according to an inverted circuit, and the pump is located accordingly below the engine. The power supply of both units is via one cable through a switch, which sets the operation modes of both units independently.

Figure 1 shows a diagram of a pumping unit for implementing a method of producing fluid from two layers.

A pumping unit 3 was launched into the well 1 on the tubing string 2, which contains an upper immersion unit 4, a cable line 5, a switch 6, a lower immersion unit 7, a check valve 8, a flowmeter 9 with a communication line 10. A docking unit 11 located below connects the pumping unit installation 3, with a packer 12 located above the roof of the lower oil reservoir. The flow rate of the lower reservoir, registers the flow meter 9 and passes through the communication line 10 to the control station through the lower unit 7.

A method of extracting fluid from different reservoirs within the same well, including taking fluid from the lower reservoir and injecting fluid into the annulus above the packer, and injecting both the fluid raised from under the packer and the fluid from the upper layer.

During operation from the lower oil reservoir, separated from the upper oil reservoir by the packer, fluid is drawn into the over packer space through the lower pump. The lower unit is made upside down, i.e. the pump is located below the drive motor and the inlet is through the fishing head. A docking unit is installed between the packer and the lower unit, which allows installation and dismantling of the pump unit without mounting and dismounting the packer. The flow meter is designed to account for the volume of produced fluid from the lower reservoir, the check valve is designed to exclude the reverse fluid flow when the lower unit is stopped. From the overpacker space into which the fluid enters both from the upper layer and the lower layer through the lower unit, the upper unit pumps it to the surface, and the amount of produced fluid can be adjusted by changing the operating mode of the lower and upper unit. The power of both units is via one power cable. Switching on, switching off, as well as regulation takes place through a switch that controls the units independently of each other at the signal of the control station.

The invention allows the use of two units for production from two layers, within the same well with the regulation of production volumes of each layer independently of each other, and through the use of one power cable to reduce the cost of installation and dismantling, and the cost of the equipment itself. And also to eliminate the time-consuming and technically difficult installation of two submersible centrifugal units with two power cables, eliminating the risk of confusion and breakage of the power cables.

Claims (1)

A pump installation for extracting fluid from two layers within the same well, consisting of a packer, flow meter, lower unit, cable line, switching unit, upper unit, tubing, characterized in that an immersion flow meter is attached to the lower unit, and the unit itself made according to an inverted circuit, and the pump is located below the engine, and the power of both units is provided on one cable through a switch, providing the ability to set the operating modes of both units independently.