Electric submersible pump suspension process pipe column

Abstract

The invention discloses an electric submersible pump hanging process pipe column. Comprising a tubing hanger arranged at the upper part of a casing; the upper oil pipe is arranged below the oil pipe hanger, and the upper end of the upper oil pipe is connected with the oil pipe hanger; the upper end of the electric submersible pump unit is detachably connected with the lower end of the upper oil pipe; the electric submersible pump unit is provided with a suction inlet arranged in the radial direction. The upper end of the lower oil pipe is detachably connected with the lower end of the electric submersible pump unit; the perforated pipe is arranged in the middle of the lower oil pipe, and a plurality of radially arranged open holes are formed in the perforated pipe; the positioning seal is arranged at the lower part of the lower oil pipe and is used for realizing setting with a packer in a sleeve; and the production sliding sleeve is arranged at the lower end of the lower oil pipe. The electric submersible pump unit has the advantages that the electric submersible pump unit is detachably connected with the upper oil pipe and the lower oil pipe, a Y-shaped connector is not needed, the maximum projection area of a pipe column is greatly reduced, and the electric submersible pump unit can be tripped into a 7-inch casing pipe.

Description

Technical Field

[0001] The invention relates to the field of natural gas exploration and development, and in particular to an electric submersible pump suspension process pipe column. Background Art

[0002] In oil production, for oil and water wells where the downhole energy is insufficient to achieve self-flowing production, downhole electric submersible pumps are usually used to implement mechanical oil production. In order to achieve stratified production and testing, such wells usually adopt a Y-string structure, with sub-production pipes and tools suspended under the Y-type joint. The Y-type joint bears the hanging weight of the lower sub-production pipe string in this type of pipe string and provides a separate downhole channel for wireline cable testing operations.

[0003] Due to the limitation of the inner diameter of the production casing and the outer diameter of the Y-type tool, the internal space of the casing limits the selection of the outer diameter of the unit. At the same time, with the increase of side drilling wells, the space inside many 7-inch casings cannot accommodate the side-by-side arrangement of the bypass pipe of the unit and the Y-string, and the Y-tube separate production and testing cannot be realized. Summary of the invention

[0004] The object of the present invention is to provide an electric submersible pump suspension process pipe string, wherein the electric submersible pump unit is detachably connected to the upper oil pipe and the lower oil pipe respectively, without the need for a Y-type joint, thereby greatly reducing the maximum projection area of ​​the pipe string and being able to be lowered into a 7-inch casing.

[0005] Another object of the present invention is to provide an electric submersible pump suspension process pipe column, wherein the electric submersible pump unit is detachably connected to the upper oil pipe and the lower oil pipe through flanges or threads, and can be directly connected to carry the lower pipe column without the need to use a canning tool to bear the weight of the bottom pipe column, thereby further reducing the maximum outer diameter of the pipe column.

[0006] Another object of the present invention is to provide an electric submersible pump suspension process pipe string,

[0007] To achieve the above object, the present invention adopts the following technical solutions, including:

[0008] A tubing hanger, which is arranged on the upper part of the casing;

[0009] An upper oil pipe, which is arranged below the oil pipe hanger, and the upper end of the upper oil pipe is connected to the oil pipe hanger;

[0010] An electric submersible pump unit, the upper end of which is detachably connected to the lower end of the upper oil pipe; a radially arranged suction port is provided on the electric submersible pump unit;

[0011] A lower oil pipe, the upper end of which is detachably connected to the lower end of the electric submersible pump unit;

[0012] A perforated pipe, which is arranged in the middle of the lower oil pipe and has a plurality of radially arranged openings;

[0013] A positioning seal, which is arranged at the lower part of the lower oil pipe and is used to achieve sealing with the packer in the casing;

[0014] A production sliding sleeve is arranged at the lower end of the lower oil pipe.

[0015] Preferably, a downhole safety valve is provided on the upper portion of the upper oil pipe.

[0016] Preferably, it also includes:

[0017] A cable packer is arranged on the upper oil pipe and is located below the downhole safety valve.

[0018] Preferably, a safety joint is provided on the lower oil pipe above the perforated pipe.

[0019] Preferably, the electric submersible pump unit is detachably connected to the upper oil pipe and the lower oil pipe respectively through flanges or threads.

[0020] The beneficial effects of the present invention are as follows: the electric submersible pump unit is detachably connected to the upper oil pipe and the lower oil pipe respectively, and does not need to use a Y-type joint, which greatly reduces the maximum projection area of ​​the pipe string and can be lowered into a 7-inch casing. The electric submersible pump unit is detachably connected to the upper oil pipe and the lower oil pipe respectively through flanges or threads, and can be directly connected to carry the lower pipe string, without the need to use a canned tool to bear the weight of the bottom pipe string, further reducing the maximum outer diameter of the pipe string, and solving the problem that some large-diameter and large-displacement units cannot be lowered after using a canned tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a cross-sectional view of an electric submersible pump suspension process pipe string.

[0022] Figure 2 It is a cross-sectional view of the electric submersible pump unit in the present invention. DETAILED DESCRIPTION

[0023] The invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according to the description.

[0024] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or other elements or combinations thereof.

[0025] like Figure 1-2 As shown, an electric submersible pump suspension process string 1 of the present invention comprises:

[0026] To achieve the above object, the present invention adopts the following technical solutions, including:

[0027] The oil pipe hanger 111 is arranged on the upper part of the casing 2;

[0028] An upper oil pipe 110 is disposed below the oil pipe hanger 111, and an upper end of the upper oil pipe 110 is connected to the oil pipe hanger 111;

[0029] An electric submersible pump unit 120, the upper end of which is detachably connected to the lower end of the upper oil pipe 110; a radially arranged suction port 121 is provided on the electric submersible pump unit 120;

[0030] A lower oil pipe 130, the upper end of which is detachably connected to the lower end of the electric submersible pump unit 120;

[0031] A perforated pipe 140 is disposed in the middle of the lower oil pipe, and a plurality of radially arranged openings 141 are provided on the perforated pipe 140;

[0032] A positioning seal 150, which is arranged at the lower part of the lower oil pipe 130 and is used to achieve sealing with the packer 210 in the casing 2;

[0033] A production sliding sleeve 131 is arranged at the lower end of the lower oil pipe 130 .

[0034] During use, the downhole fluid flows into the lower oil pipe 130 through the production sleeve 131, flows out from the opening 141 of the perforated pipe 140, and then flows into the suction port 121 of the electric submersible pump unit 120. After artificial mechanical lifting, it flows from the upper oil pipe 110 to the wellhead.

[0035] In another embodiment, a downhole safety valve 112 is provided on the upper portion of the upper oil pipe 110 .

[0036] In another embodiment, the system further comprises: a cable packer 160 , which is disposed on the upper oil pipe 110 and is located below the downhole safety valve 112 .

[0037] In another embodiment, a safety joint 132 is provided above the perforated pipe 140 on the lower oil pipe 130 .

[0038] In another embodiment, the electric submersible pump unit 120 is detachably connected to the upper oil pipe 110 and the lower oil pipe 130 respectively through flanges or threads.

[0039] In summary, the present invention provides an electric submersible pump suspension process pipe string 1, wherein the electric submersible pump unit is detachably connected to the upper oil pipe and the lower oil pipe, respectively, without the need for a Y-type joint, which greatly reduces the maximum projection area of ​​the pipe string and can be lowered into a 7-inch casing. The electric submersible pump unit is detachably connected to the upper oil pipe and the lower oil pipe respectively through flanges or threads, and can be directly connected to carry the lower pipe string, without the need for a canning tool to bear the weight of the bottom pipe string, further reducing the maximum outer diameter of the pipe string, and solving the problem that some large-diameter and large-displacement units cannot be lowered after using a canning tool.

[0040] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An electric submersible pump suspension process string, characterized in that: include: A tubing hanger, which is arranged on the upper part of the casing; An upper oil pipe, which is arranged below the oil pipe hanger, and the upper end of the upper oil pipe is connected to the oil pipe hanger; An electric submersible pump unit, the upper end of which is detachably connected to the lower end of the upper oil pipe; a radially arranged suction port is provided on the electric submersible pump unit; A lower oil pipe, the upper end of which is detachably connected to the lower end of the electric submersible pump unit; A perforated pipe, which is arranged in the middle of the lower oil pipe and has a plurality of radially arranged openings; A positioning seal, which is arranged at the lower part of the lower oil pipe and is used to achieve sealing with the packer in the casing; A production sliding sleeve is arranged at the lower end of the lower oil pipe.

2. The electric submersible pump suspension process string according to claim 1, characterized in that: A downhole safety valve is arranged on the upper part of the upper oil pipe.

3. The electric submersible pump suspension process string according to claim 2, characterized in that: Also includes: A cable packer is arranged on the upper oil pipe and is located below the downhole safety valve.

4. The electric submersible pump suspension process string according to claim 1, characterized in that: On the lower oil pipe, a safety joint is provided above the perforated pipe.

5. The electric submersible pump suspension process string according to claim 1, characterized in that: The electric submersible pump unit is detachably connected to the upper oil pipe and the lower oil pipe respectively through flanges or threads.

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