Ring seals for oil and gas applications

The ring seal design with a web feature, lip feature, and grooves aligned perpendicular to the wellbore axis addresses geometric variability and misalignments, ensuring a reliable and flexible seal under high-pressure conditions.

WO2026125425A1PCT designated stage Publication Date: 2026-06-18BAKER HUGHES ENERGY TECH UK LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
BAKER HUGHES ENERGY TECH UK LTD
Filing Date
2025-12-09
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Existing ring seals in subsea wells and completion installations are sensitive to geometric variability and misalignments, leading to challenges in low-pressure operations and requiring improved flexibility and reliability.

Method used

A ring seal design featuring a web feature, lip feature, and grooves with a groove bottom transition aligned perpendicular to the wellbore axis, along with structural symmetry and angled sealing surfaces, providing a high interference fit and reduced contact stresses to enhance flexibility and reliability under high-pressure conditions.

Benefits of technology

The design ensures a tighter and more reliable seal with reduced risk of galling or scratching, maintaining contact stresses within limits, and supporting robust performance in high-pressure environments up to 15 ksi.

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Abstract

Systems and methods disclosed herein are for a subsea well or completion installation and may include a ring seal having a web feature and at least one lip feature. There may be at least one groove between the web feature and the at least one lip feature. The groove may include a groove bottom transition which may be aligned along a horizontal axis which is perpendicular with respect to a vertical axis of a wellbore of the subsea well or completion installation.
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