Rotating control device

The RCD's innovative bearing assembly with a load ring and landing adapter ensures effective sealing by radially compressing the seal, addressing fluid leakage issues in varying housing diameters during drilling.

US20260201770A1Pending Publication Date: 2026-07-16SCHLUMBERGER TECH CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SCHLUMBERGER TECH CORP
Filing Date
2026-03-13
Publication Date
2026-07-16

AI Technical Summary

Technical Problem

Existing rotating control devices (RCDs) face issues when the housing diameter varies, as the existing seals can no longer be used, leading to potential fluid leaks during drilling operations.

Method used

The RCD incorporates a bearing assembly with a load ring and a landing adapter, where the landing adapter has a tapered outer shoulder that lands on a tapered inner shoulder of the RCD housing, and a piston radially compresses the load ring to axially compress the seal, causing it to expand radially and prevent fluid flow between the bearing housing and the RCD housing during rotation.

Benefits of technology

This design effectively seals the drill string, preventing fluid leaks and ensuring containment of hydrocarbons or wellbore fluids during drilling operations, even with varying housing diameters.

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Abstract

A rotating control device (RCD) for use during a drilling operation includes a bearing assembly. The bearing assembly includes a bearing body. The bearing assembly also includes a bearing housing positioned around the bearing body. The bearing assembly also includes a load ring positioned around the bearing housing. The load ring includes a tapered surface. The bearing assembly also includes a seal positioned below the load ring. The RCD also includes a landing adapter positioned around the bearing housing, above he bearing housing, or both. The landing adapter is positioned above the seal and the load ring. The RCD also include an RCD housing positioned at least partially around the bearing assembly and the landing adapter. The bearing assembly and the landing adapter are configured to rotate with respect to the RCD housing.
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