RU115420U1 - SUBMERSIBLE BARRELESS ELECTRIC PUMP FOR JOINT AND SEPARATE OPERATION OF TWO OIL LAYERS - Google Patents

Abstract

A submersible rodless electric pump for joint-separate operation of two oil reservoirs, containing an upper module-section of the pump with a differential attachment-disperser with intake channels and an engine with hydraulic protection, characterized in that it is additionally equipped with a lower hydraulic protection, a lower module-section containing flow channels, differential a dispersing attachment with receiving channels, a liner with a receiving channel, as well as a packer with sleeves and a centralizer.

Description

Known submersible electric pumping units for pumping formation water-gas mixture from wells (International translator. Installation of submersible centrifugal pumps for oil production. Moscow. 1999).

A well-known installation of an electric centrifugal pump for well development (options), comprising a submersible centrifugal pump with a receiving grid, a submersible motor with hydraulic protection made in the form of lower and upper protectors, mounted on top and bottom on the shaft of a submersible electric motor (Utility Model Patent No. 102072 IPC F04D 13 / 10 from 08/28/2010).

However, this installation does not allow the joint-separate operation of two oil reservoirs.

A well-known downhole installation of an electric centrifugal pump for simultaneous and separate oil production, including a packer, an additional centrifugal pump driven by a single submersible electric motor, is made of their lower stages of the main pump with radial holes in the upper part for the liquid to enter the over-packer space, above which the main pump is received ( Utility Model Patent No. 73391 IPC F04B 43/14 dated 05/20/2008).

A disadvantage of the known design is the difficulty of installing the packer in the well when the pump is running.

The closest set of essential features to the utility model is a submersible rodless electric pump containing the upper module section of the pump with a differential attachment-disperser with receiving channels and a motor with hydraulic protection (Utility Model Patent No. 58631 IPC F04D 13/10 of 05.22.2006).

The disadvantage of this device is that a submersible rodless electric pump with a differential attachment-disperser does not solve the problem of jointly-separate operation of two oil reservoirs in one well.

The objective to which the present utility model is directed is to create a simple, reliable and economical device for increasing oil production during the joint and separate operation of two oil reservoirs.

The technical result is achieved by the fact that in the proposed submersible rodless electric pump for joint and separate operation of two oil reservoirs containing the upper module section of the pump with a differential attachment-disperser with receiving channels and a motor with hydraulic protection, according to a utility model, the submersible rodless electric pump is additionally equipped with lower hydraulic protection , the lower module - a section containing the flow channels, a differential prefix-disperser with receiving channels, a shank having a receiver channel, as well as a packer with couplings and a centralizer.

Providing a submersible rodless electric pump for the joint and separate operation of two oil reservoirs with lower hydraulic protection, the lower module with a section containing flow channels, a differential attachment-disperser with receiving channels, a shank having a receiving channel, as well as a packer with couplings and a centralizer, provide separate creation necessary depression on the upper and lower productive formations, prolonging the stable operation of a submersible rodless electric pump with a higher content of solids gas in the produced products, as well as a reliable thermal protection against overheating.

The drawing provides a submersible rodless electric pump for joint and separate operation of two oil reservoirs.

The submersible rodless electric pump for the joint and separate operation of two oil reservoirs contains the upper module section of the pump 1 with a differential attachment-disperser 2 with receiving channels 3, the engine 4 with hydraulic protection 5 and lower hydraulic protection 6, the lower module section of the pump 7 with flow channels 8 s a differential attachment-disperser 9 with receiving channels 10, a shank 11 with a receiving channel 12, a packer 13 with couplings 14, a centralizer 15.

Works submersible rodless electric pump for joint and separate operation of two oil reservoirs as follows.

When a submersible rodless electric pump is used for jointly separate operation of two oil reservoirs, oil from the lower formation of the well enters through the receiving channels 10 of the differential set-top box 9 into the lower module section of the pump 7, and the produced water enters through the receiving channel 12 of the shank 11 with the centralizer 15, also through the differential prefix-dispersant 9 into the lower module section of the pump 7. Through the flow channels 8 of the module section of the pump 7, the oil-water mixture is pumped into the over-packer annular space 16 between production casing 17 and a submersible rodless electric pump, forcibly cooling the lower 6 and upper 5 hydraulic protection, motor 4, cable line, primary downhole sensors (not shown). At the same time, the oil-water mixture enters from the upper layer into the over-packer annular space 16, which mixes with the oil-water mixture from the lower layer into the receiving channels 3 of the differential set-top box 2, into the upper module section of the pump 1, which pumps it into the tubing ( Tubing) 18.

This design of a submersible rodless electric pump for the joint and separate operation of two oil reservoirs makes it possible to determine oil production separately from each reservoir, to create the necessary depression separately for each reservoir, using frequency regulation of the rotation of the engine rotor. At the same time, the problem of thermal protection of the ESP from overheating is being solved. As a result of using the upper and lower differential prefixes-dispersants, the efficiency of free gas separation in the overpacker annular space increases, in the suspension zone of the upper module section of a submersible rodless electric pump, the upper and lower module sections of electric pumps work more stably when pumping viscous liquids and an increased content of solids in her.

Separate intake of produced water and oil-gas mixture from the lower layer into the differential dispersant attachment, and from it into the lower module section of the submersible rodless electric pump, eliminates the possibility of premature oil flooding in the bottomhole zone of the well. Ultimately, oil production from the well increases with a submersible rodless electric pump operating separately two layers, and capital, operating and other costs are reduced.

When using a submersible rodless electric pump for joint and separate operation of two oil reservoirs, the field of its introduction, both in the well and on the surface, significantly expands due to the increase in the number of module sizes of module sections of a submersible rodless electric pump that are put into operation from one electric drive several times.

So, for example, the productivity of one installation of domestic production during parallel operation of module sections in the well increases by 2 times at maximum productivity while maintaining the pressure.

- ESP M4 up to 400 m ³ / day. with a pressure of 1300 m or more;

- U2 ESP M4 up to 400 m ³ / day. with a pressure of 1200 m or more;

- U2 ESP M5 up to 500 m ³ / day. with a pressure of 1450 m or more;

- U2 ESP M5A up to 1000 m ³ / day. with a pressure of 1000 m or more;

- ESP A5 up to 400 m ³ / day. with a pressure of 1450 m or more;

- ESP A5A up to 1000 m ³ / day. with a pressure of 1150 m;

- ESP A6 up to 1600 m ³ / day with a pressure of 1100 m or more

- ESP M6 up to 2500 m ³ / day. with a pressure of 930 m or more.

Claims (1)

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-disperser 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 the discharge channels, differential dispersant attachment with receiving channels, a shank having a receiving channel, as well as a packer with couplings and a centralizer.