A fully self-contained, trailer-mounted system for safe, controlled pressure relief and gas flaring on pipelines and wellheads — including sour gas — deployable at remote field locations without cranes or lifting equipment.
Engineered and standards-compliant; not yet deployed in the field. Available to operators for a first field deployment under a joint programme.
Mobile Pressure Bleed-Off System · design render
Overview
The Mobile Pressure Bleed-Off System is a modular, trailer-mounted unit that consolidates all equipment required for controlled gas depressurisation and flaring into a single transportable skid. It is designed for deployment at remote field locations where fixed infrastructure is unavailable and crane access is impractical, enabling rapid setup and teardown by the operating crew without additional lifting equipment.
The system’s key technical differentiator versus conventional mobile flaring units is the integration of a dedicated H₂S gas scrubber into the process sequence. Installed downstream of the liquid knockout drum and upstream of the flare stack, the scrubber chemically binds hydrogen sulphide from the gas stream — using an alkaline reagent — before combustion, substantially reducing toxic emissions to atmosphere. This makes the system suitable for sour-gas environments where conventional flaring equipment would generate unacceptable H₂S emissions, or where local regulations require scrubbing prior to flare.
The modular layout of all components on a single skid or trailer allows assembly directly at the point of use with no cranes, achieving fast deployment and demobilisation. The system is suited to planned maintenance bleed-off operations, pipeline commissioning and decommissioning, emergency pressure relief, and any temporary operation requiring controlled gas disposal under high-pressure or sour-gas conditions.
How it works
Process sequence
Connection
Quick-connect high-pressure lines are attached to the pipeline or wellhead. High-pressure flexible lines allow connection without alignment modifications to existing infrastructure.
Pressure reduction
Gas passes through an adjustable choke manifold that provides regulated, stepwise reduction of pressure and flow rate to safe operating levels for downstream equipment.
Liquid knock-out
The gas stream enters a Knock-Out Drum (KOD) that separates the liquid phase — oil and produced water — from the gas before it continues downstream. Liquid is collected and disposed of separately.
H₂S scrubbing
The gas scrubber — the key differentiating component of this system — removes hydrogen sulphide through chemical reaction with an alkaline solution (e.g. NaOH or similar reagent). This step substantially reduces toxic H₂S concentration in the combustion gas, lowering atmospheric emissions and protecting personnel.
Controlled flaring
Cleaned gas is burned on a vertical flare stack equipped with pilot ignition and continuous flame monitoring. The system confirms stable combustion before and during the bleed-off operation.
