一种油田注聚合物同心三通道封隔配注一体化封隔器

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By designing a concentric three-channel packer and sealing the packer assembly, the problem of fluid interference in existing packers is solved, enabling precise control of the polymer solution injection volume and pressure, improving oil displacement effect and sealing performance, and reducing operation difficulty and cost.

CN224515157UActive Publication Date: 2026-07-17九环机械股份有限公司

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: 九环机械股份有限公司
Filing Date: 2025-09-26
Publication Date: 2026-07-17

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Abstract

一种油田注聚合物同心三通道封隔配注一体化封隔器，其包括：同轴管体结构：由内向外依次同轴套设的中心管、中层管和外套管，三者形成相互独立的第一通道、第二通道及第三通道；其中所述第一通道为中心管的内腔，所述第二通道为中心管与中层管之间的环形空间，所述第三通道为中层管与外套管之间的环形空间；密封胶筒组件：套设于外套管外侧，用于实现封隔器与油井套管之间的密封；本实用新型结构新颖，同心三通道的设计使得可以同时向三个不同油层分别注入聚合物溶液，且各通道相互独立，通过对通道内径和注液口单向阀的设置，能够精确控制各油层的聚合物注入量和注入压力，避免了流体干扰，提高了驱油效果。

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Claims

1. A polymer injection concentric three-channel injection and packer integrated packer for oil field, characterized in that, include: Coaxial tube structure: A central tube (8), a middle tube (7) and an outer tube (9) are coaxially nested from the inside out, forming a first channel, a second channel and a third channel that are independent of each other; wherein the first channel is the inner cavity of the central tube (8), the second channel is the annular space between the central tube (8) and the middle tube (7), and the third channel is the annular space between the middle tube (7) and the outer tube (9); Sealing sleeve assembly: Sleeve over the outside of the outer sleeve (9) to achieve a seal between the packer and the well casing; Setting mechanism: drives the sealing cartridge assembly to compress and expand to achieve setting; Unsealing mechanism: drives the sealing tube assembly to contract to achieve unsealing, which includes unsealing shear pin (17).

2. The concentric three-channel packer and separate injection integrated packer for polymer injection in oilfields according to claim 1, characterized in that: The cross-sectional areas of the first channel, the second channel, and the third channel are respectively the inner cavity area of the central tube (8), the annular space area between the central tube (8) and the middle tube (7), and the annular space area between the middle tube (7) and the outer tube (9).

3. The concentric three-channel packer and separate injection integrated packer for polymer injection in oilfields according to claim 2, characterized in that: The sealing tube assembly includes at least two sealing tubes (13), with a support ring (14) between adjacent sealing tubes (13), and the sealing tubes (13) are made of oil-resistant and corrosion-resistant rubber material.

4. The concentric three-channel packer and separate injection integrated packer for polymer injection in oilfields according to claim 3, characterized in that: The setting mechanism includes a setting piston (19, 21) and a pusher. An outer shell is provided on the outside of the outer tube (9). The setting piston is located in the annular space between the outer tube (9) and the outer shell. One end of the pusher is connected to the setting piston, and the other end abuts against the sealing tube assembly.

5. The integrated packer and flow control device of claim 4, wherein: The unsealing shear pin (17) is located between the sealing tube assembly and the outer sleeve (9).

6. The concentric three-channel packer and separate injection integrated packer for polymer injection in oilfields according to claim 5, characterized in that: The side wall of the support ring (14) is provided with a chamfered structure to reduce stress concentration when the sealing tube (13) is compressed.