Wellbore plugging apparatus and methods of operation thereof

By designing a mechanical setting structure for the wellbore plugging device, the problem of insufficient sealing performance of existing pressure testing plugging devices under high or ultra-high pressure conditions is solved, achieving reliable plugging and sealing of high-pressure oil and gas wellheads, and is suitable for sealing inspection of high-pressure or ultra-high-pressure wellheads.

CN122328044APending Publication Date: 2026-07-03CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2025-01-02
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing pressure testing and sealing devices are not sufficiently airtight under high or ultra-high pressure conditions, making it difficult to meet the pressure testing requirements of high-pressure oil and gas wells.

Method used

The wellbore plugging device includes a central tube, a sealing assembly, and an anchoring assembly. Through a mechanical setting structure design, the sealing sleeve expands radially to form a sealing contact with the casing, and the setting and unsealing states are switched by rotating the central tube.

Benefits of technology

It enables reliable plugging and sealing of oil and gas wellheads under high or ultra-high pressure conditions, improving the safety and reliability of pressure testing, and is suitable for sealing inspection of high-pressure and even ultra-high-pressure wellheads.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a wellbore plugging device and its operating method. The device is used to plug the casing of oil and gas wellheads under high-pressure or ultra-high-pressure testing conditions. It includes a central tube with an upper end and a lower end connected to its upper and lower ends, respectively. From the upper end to the lower end, a first conversion assembly, a sealing assembly with at least one sealing rubber sleeve, an anchoring assembly, and a second conversion assembly are sequentially fitted onto the central tube between the upper and lower ends. The first and second conversion assemblies are threadedly connected to the central tube. When the central tube is rotated clockwise or counterclockwise, the first and second conversion assemblies move towards or away from each other along the axis of the central tube. A volumetric tube is provided between the sealing assembly and the central tube, and is fixedly connected to the central tube. The upper end of the volumetric tube and the lower part of the first conversion assembly cooperate to form a bypass structure. The wellbore plugging device of this invention is reliable in operation and can withstand high-pressure sealing.
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