CN112983365A

CN112983365A - Suspension system of electric submersible pump

Info

Publication number: CN112983365A
Application number: CN201911307656.7A
Authority: CN
Inventors: 施宇; 李登; 李楠; 肖源泓; 钟路; 赵施成; 施博文
Original assignee: HUNAN VICTOR PETROTECH SERVICE CO Ltd
Current assignee: HUNAN VICTOR PETROTECH SERVICE CO Ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2021-06-18

Abstract

The invention discloses an electric submersible pump suspension system which comprises a three-way joint, an electric submersible pump and a bypass pipe, wherein the three-way joint is connected with a first oil pipe, and is connected with the electric submersible pump and the bypass pipe; the submersible electric pump and the bypass pipe respectively form a production channel and a bypass pipe channel. The invention can meet the requirement that a common 101 electric submersible pump is adopted for well repair of a slim-hole oil well completed by 7 inches of casing, layered production can be realized by adopting two channels, namely a production channel and a by-pass pipe channel, and the by-pass pipe channel control can be realized by adding a fluid control tool (standard steel wire operation).

Description

Suspension system of electric submersible pump

Technical Field

The invention belongs to oil well exploitation equipment, and particularly relates to an electric submersible pump suspension system.

Background

After the oil well is exploited for a period of time, the oil reservoir pressure is reduced, the yield is reduced, even the self-blowout is not possible in the middle and later development stages, and some artificial lifting measures are needed to stabilize the yield, increase the yield and improve the recovery ratio.

The electric submersible pump is one of the artificial lifting modes with the highest efficiency, the system efficiency is 35-60%, the working range is wide, and the electric submersible pump is suitable for various complex well conditions and has a wide application range. In particular, in offshore fields, electric submersible pump systems are often used to repair wells to ensure stable production from the wells.

As oil prices have fallen, there has been an increasing trend toward completing wells using slim hole (7 inch casing run-in) with less consumption, faster rates, and lower costs to control drilling costs. A batch of small well bore oil wells in south China sea have been produced for many years, and an electric submersible pump system needs to be built into a well to ensure normal production.

The 101 electric submersible pump commonly used in China is generally used in 75/8 or 95/8 casing pipes with the diameter of more than 7 inches. There is no suspension system that can use a 101 inch submersible pump with a 7 inch casing.

Disclosure of Invention

The invention aims to provide an electric submersible pump suspension system matched with a 7-inch casing.

The technical scheme adopted for realizing the purpose of the invention is as follows:

the invention provides an electric submersible pump suspension system which comprises a three-way joint, an electric submersible pump and a bypass pipe, wherein the three-way joint is connected with a first oil pipe, and is connected with the electric submersible pump and the bypass pipe; the submersible electric pump and the bypass pipe respectively form a production channel and a bypass pipe channel.

And a bypass pipe, a tool, a double-pipe four-way joint and a second oil pipe are arranged between the three-way joint and the electric submersible pump as well as between the three-way joint and the bypass pipe, the upper joint and the lower joint of a first channel of the double-pipe four-way joint are respectively connected with the second oil pipe and the electric submersible pump, the upper joint and the lower joint of a second channel of the double-pipe four-way joint are respectively connected with the tool and the bypass pipe, the second oil pipe, the first channel of the double-pipe four-way joint and the electric submersible pump form a production channel, and the tool.

A bypass pipe, a tool, a double-pipe four-way joint, a union, a rotary locking joint, a buckle changing joint, a second oil pipe and a third oil pipe are arranged between the three-way joint and the electric submersible pump as well as between the three-way joint and the bypass pipe; the tool is connected with a union below, the union is connected with a third oil pipe below, the third oil pipe is connected with an upper joint of a second channel of a double-pipe four-way joint below, a lower joint of the second channel of the double-pipe four-way joint below is connected with a bypass pipe, a lower joint of a first channel of the double-pipe four-way joint below is connected with a buckle change joint, an electric submersible pump below the buckle change joint below, a production channel is formed by the second oil pipe, the rotary locking joint, the first channel of the double-pipe four-way joint, the buckle change joint and the electric submersible pump, and a bypass pipe channel is formed by a blanking plug working barrel, the union, the third oil.

The tool employs a plug mandrel.

The outer diameter of the three-way joint is smaller than or equal to 158.52mm, the outer diameter of the electric submersible pump is 101mm, and the inner diameter of the bypass pipe is 46 mm.

Advantageous effects

The invention can meet the requirement that a common 101 electric submersible pump is adopted for well repair of a slim-hole oil well completed by 7 inches of casing, layered production can be realized by adopting two channels, namely a production channel and a by-pass pipe channel, and the by-pass pipe channel control can be realized by adding a fluid control tool (standard steel wire operation).

The technical scheme of the invention is further explained by combining the attached drawings.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.

Fig. 4 is a schematic structural view of a rotary lock joint in embodiment 3 of the present invention.

FIG. 5 is a schematic view of the structure of Olean in example 3 of the present invention.

Detailed Description

Example 1

Referring to fig. 1, the suspension system of the electric submersible pump provided by the invention comprises a three-way joint 2, an electric submersible pump 3 and a bypass pipe 4, wherein the three-way joint 2 is connected with an oil pipe 1, the electric submersible pump 3 and the bypass pipe 4 are connected, and the electric submersible pump 3 and the bypass pipe 4 respectively form a production channel A and a bypass pipe channel B.

The outer diameter of the three-way joint 2 is less than or equal to 158.52mm, the outer diameter of the electric submersible pump 3 is 101mm, and the inner diameter of the bypass pipe 4 is 46 mm.

Example 2

The electric submersible pump suspension system can be additionally provided with tools on a bypass pipeline when a channel below the bypass pipeline needs to be plugged, and the structure of the electric submersible pump suspension system is shown in figure 2 and comprises a three-way joint 2, an electric submersible pump 3, a bypass pipeline 4, a tool 5, a double-pipe four-way joint 6 and an oil pipe 1 ', wherein the three-way joint 2 is connected with the oil pipe 1 in an upper mode, and is connected with the tool 5 and the oil pipe 1' in a lower mode; the upper joint and the lower joint of a first channel of the double-pipe four-way joint 6 are respectively connected with the oil pipe 1 'and the electric submersible pump 3, the upper joint and the lower joint of a second channel of the double-pipe four-way joint 6 are respectively connected with the tool 5 and the bypass pipe 4, the oil pipe 1', the first channel of the double-pipe four-way joint 6 and the electric submersible pump 3 form a production channel, and the tool 5, the second channel of the double-pipe four-way joint 6 and the bypass pipe 4 form a bypass pipe channel.

Example 3

The electric submersible pump suspension system comprises a three-way joint 2, an electric submersible pump 3, a bypass pipe 4, a tool 5, a double-pipe four-way joint 6, a union 7, a rotary locking joint 8, a buckle-changing joint 9, an oil pipe 1 'and an oil pipe 1', wherein the tool 5 adopts a plug working barrel; the tee joint 2 is connected with an oil pipe 1' and a plug working cylinder 5 in a downward connecting mode, the cross section of the plug working cylinder 5 is selectable, and a proper check valve plug can be matched to unidirectionally plug a bypass pipeline below; the rotary locking joint 8 is connected to the lower part of the oil pipe 1', the rotary locking joint 8 is composed of an upper joint 801, an outer pipe 802, a central pipe 803 and a lower joint 804 which are sequentially connected as shown in figure 4, and an O-shaped ring 805 is arranged between the outer pipe 802 and the central pipe 803; the length of the rotary locking joint 8 is variable, the requirement of double-pipe installation and length adjustment can be met, and the upper joint of the first channel of the double-pipe four-way joint 6 is connected with the lower part of the rotary locking joint 8; the lower part of the blanking plug working barrel 5 is connected with an oil union 7, the oil union 7 is composed of an upper joint 701, a lower joint 705 and a sleeve 702 arranged between the upper joint 701 and the lower joint 705, which are connected with each other, an O-shaped ring 703 is arranged between the upper joint 701 and the lower joint 705, the phase angle between the upper joint 701 and the

lower joint

701 and 705 is adjustable so as to meet the requirement of double-pipe installation and phase angle adjustment, the oil union 7 is connected with an oil pipe 1 'in a lower part, the upper joint of a second channel of the double-pipe four-way joint 6 is connected with the oil pipe 1', the lower joint of the second channel of the double-pipe four-way joint 6 is connected with a bypass pipe 4, the lower joint of the first channel of the double-pipe four-way joint 6. The oil pipe 1', the rotary locking joint 8, the first channel of the double-pipe four-way joint 6, the buckle-changing joint 9 and the electric submersible pump 3 form a production channel, and the blanking plug working barrel 5, the union 7, the oil pipe 1 ", the second channel of the double-pipe four-way joint 6 and the bypass pipe 4 form a bypass pipe channel.

The upper part of the bypass pipe channel is provided with a blanking plug working barrel 5 which can be matched with a proper tool such as a blanking plug or a check valve blanking plug and can realize the fluid control function of normal open, unidirectional cut-off or bidirectional cut-off; and tools such as a sliding sleeve and the like can be connected below the bypass pipe 4 of the bypass pipe channel, the bypass pipe channel has a larger drift diameter (the inner diameter is 46 mm) to allow an opening and closing tool to pass through by adopting a standard steel wire operation mode, and the sliding sleeve is opened and closed.

Claims

1. The suspension system of the electric submersible pump is characterized by comprising a tee joint, the electric submersible pump and a bypass pipe, wherein the tee joint is connected with a first oil pipe, a lower electric submersible pump and the bypass pipe; the submersible electric pump and the bypass pipe respectively form a production channel and a bypass pipe channel.

2. An electrical submersible pump suspension system according to claim 1, wherein a bypass pipe, a tool, a double-pipe four-way joint and a second oil pipe are provided between the three-way joint and the electrical submersible pump and the bypass pipe, wherein the upper and lower joints of the first channel of the double-pipe four-way joint are connected with the second oil pipe and the electrical submersible pump respectively, the upper and lower joints of the second channel of the double-pipe four-way joint are connected with the tool and the bypass pipe respectively, the first channel of the second oil pipe and the double-pipe four-way joint and the electrical submersible pump constitute a production channel, and the second channel of the tool and the double-pipe four-way joint and the.

3. An electric submersible pump suspension system according to claim 1, wherein a bypass pipe, a tool, a double-pipe four-way joint, a union, a rotary locking joint, a buckle change joint, a second oil pipe and a third oil pipe are arranged between the three-way joint and the electric submersible pump and the bypass pipe, the three-way joint is connected with the second oil pipe and the blanking plug working barrel in a downward connecting mode, the second oil pipe is connected with the rotary locking joint in a downward connecting mode, and the rotary locking joint is connected with an upper joint of a first channel of the double-pipe four-way joint in a downward; the tool is connected with a union below, the union is connected with a third oil pipe below, the third oil pipe is connected with an upper joint of a second channel of a double-pipe four-way joint below, a lower joint of the second channel of the double-pipe four-way joint below is connected with a bypass pipe, a lower joint of a first channel of the double-pipe four-way joint below is connected with a buckle change joint, an electric submersible pump below the buckle change joint below, a production channel is formed by the second oil pipe, the rotary locking joint, the first channel of the double-pipe four-way joint, the buckle change joint and the electric submersible pump, and a bypass pipe channel is formed by a blanking plug working barrel, the union, the third oil.

4. An electrical submersible pump suspension system according to claim 2 or claim 3, wherein the tool is a plug mandrel.

5. An electrical submersible pump suspension system according to claim 1, wherein the tee fitting has an outer diameter of 158.52mm or less, an electrical submersible pump outer diameter of 101mm, and a bypass pipe inner diameter of 46 mm.

6. An electrical submersible pump suspension system according to claim 4, wherein the tee fitting has an outer diameter of 158.52mm or less, an electrical submersible pump outer diameter of 101mm, and a bypass pipe inner diameter of 46 mm.