Fluid flow regulator

The fluid regulator addresses the challenge of pressurizing flowlines by using a dual-flow valve assembly with set-point pressure controls, achieving efficient pressure control and a wide turndown ratio.

WO2025068698A1 Publication Date: 2025-04-03PRESSURE TECH LTD
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Patent Information

Application Number
PCT/GB2024/052476
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-26
Filing Date
2024-09-25
Publication Date
2025-04-03

AI Technical Summary

Technical Problem

Existing fluid regulators face challenges in efficiently pressurizing flowlines from zero or negligible pressure to the desired regulator set-point pressure, often causing undesirable fluid excitation that affects performance.

Method used

A fluid regulator design featuring a dual-flow valve assembly with a regulator valve member and an auxiliary valve member, both biased towards the open position. The auxiliary valve member closes at an auxiliary set-point pressure, and the regulator valve member closes at a higher regulator set-point pressure, allowing for two flow capacity ranges and a wider turndown ratio.

Benefits of technology

The fluid regulator effectively controls pressure from zero to the regulator set-point pressure, providing a wider turndown ratio and stable operation across different pressure modes, including a pressure relief mode.

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Abstract

The present disclosure relates to a fluid regulator (10) comprising a valve body (12) defining an inlet (14), an outlet (16), a valve cavity and an outlet chamber (18), the outlet chamber (18) disposed between the valve cavity and the outlet (16). A regulator flow path (26) extends between the inlet (14) and the outlet chamber (18), and an auxiliary flow path (28) extends between the inlet (14) and the outlet chamber (18). The fluid regulator (10) comprises a valve assembly (20) mounted within the valve cavity. The valve assembly (20) comprises a regulator valve member (22) movable between an open position, allowing fluid flow through the regulator flow path (26), and a closed position, preventing fluid flow through the regulator flow path (26). The valve assembly (20) comprises an auxiliary valve member (24) movable between an open position, allowing fluid flow through the auxiliary flow path (28), and a closed position, preventing fluid flow through the auxiliary flow path (28). The fluid regulator (10) comprises a biasing arrangement (30) for biasing the regulator valve member (22) and the auxiliary valve member (24) towards the open position. The biasing arrangement (30) is configured such that: (i) the auxiliary valve member moves to the closed position when the fluid pressure within the outlet chamber (18) achieves an auxiliary set-point pressure, and (ii) the regulator valve member (22) moves to the closed position when the fluid pressure within the outlet chamber (18) achieves a regulator set-point pressure, the regulator set-point pressure being greater than the auxiliary set-point pressure.
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