Yahaya Mohammed

 Operated Sulphur Recovery Unit (SRU) sour gas systems, ensuring stable and efficient process
performance in line with refinery operating procedures and HSE standards.
 Handled acid gas (H₂S/CO₂) rich streams during routine SRU operations, maintaining safe operations
within high-risk sour service environments comparable to gas sweetening and sulphur recovery
systems.
 Operated and monitored the Claus SRU process units, including thermal reactor, catalytic converters,
sulphur condensers, and tail gas treatment units, ensuring continuous operation under strict
environmental compliance requirements.
 Monitored and controlled critical process parameters including reactor temperature (900-1, 300°C),
H₂S/SO₂ ratio (2:1), system pressure (0.2-2.5 barg), and sulphur pit temperature (120-150°C) to
maintain process stability and product quality.
 Managed process upsets and operational deviations, including flame instability, condenser fouling,
sulphur rundown interruptions, and gas imbalance conditions to restore stable plant operation and
prevent downtime.
 Carried out safe start-up, shutdown, and plant stabilization activities, ensuring correct sequencing of
equipment such as burners, waste heat boilers, sulphur condensers, and incinerators in accordance
with operating procedures.
 Operated and monitored key process equipment including compressors, pumps, heat exchangers,
knockout drums, and control valves, ensuring continuous flow control, pressure stability, and reliable
unit performance under varying operating conditions.
 Conducted routine field rounds and equipment condition monitoring in SRU operations, identifying
abnormal furnace behaviour, catalyst bed performance issues, and sulphur condenser inefficiencies
to prevent process upsets and ensure stable plant operation.
 Executed catalyst bed light-off and shut-in operations, burner management, sulphur rundown system
control, and coordinated with maintenance teams for equipment isolation and reinstatement under
PTW/LOTO systems.
 Performed core SRU operational responsibilities including sulphur pit operations management,
sulphur degassing system monitoring, acid gas feed stability control, and ensured compliance with
environmental SO₂ emission limits and refinery HSE standards during continuous 24/7 shift
operations.

 Performed gas dehydration production operations on sour crude and gas production platforms,
ensuring safe handling of hydrocarbon streams containing elevated H₂S and CO₂ levels, under strict
offshore HSE and process safety standards.
 Operated and monitored 3-phase production separators (HP/MP/LP test and production separators),
maintaining stable level interface control, pressure ranges (typically 30-120 barg upstream systems),
temperature control, and effective gas-oil-water separation efficiency.
 Controlled wellhead production systems via subsea tiebacks and choke valves, regulating flow rates,
wellhead pressure, annulus pressure, and sand production conditions, while preventing hydrate
formation, slugging, and flow instability.
 Supervised performance of gas compression trains (suction scrubbers, multi-stage centrifugal
compressors, anti-surge control systems), ensuring stable suction/discharge pressures, discharge
temperature limits, vibration control, and compressor efficiency optimization.
 Monitored and operated produced water treatment systems including hydrocyclones, degassing
vessels, induced gas flotation (IGF) units, and oil-in-water separators, ensuring discharge compliance
with offshore environmental standards.
 Managed crude oil transfer and export systems, including booster pumps, export headers, custody
transfer lines, and metering systems, maintaining stable flow assurance, export pressure control, and
crude stabilization conditions.
 Executed Produced water treatment and separation process operations and equipment surveillance,
including valve line-up verification, manifold operations, pigging activities, leak detection, pressure
integrity checks, and troubleshooting of flowlines, risers, and header systems.
 Performed safe start-up, shutdown, and emergency shutdown (ESD) operations, ensuring correct
sequencing of production separators, compressors, flare systems, relief valves (PSVs), emergency
blowdown systems, and utility support systems (instrument air, fuel gas, nitrogen systems) while
maintaining full compliance with PTW, LOTO, and offshore emergency response procedures (fire &
gas, abandon platform drills, and H₂S escape readiness)

 Operated and monitored utility facilities comprising package boilers, deaerators, boiler feed water
pumps (BFWPs), condensate recovery systems, cooling water networks, air compressors, and steam
distribution headers, ensuring uninterrupted supply of HP, MP, and LP steam to refinery process units.
 Conducted routine field surveillance of boiler combustion systems, maintaining critical operating
parameters including steam pressure, steam temperature, drum level, fuel gas pressure, excess
oxygen levels, and boiler efficiency to support stable refinery operations.
 Controlled boiler feed water treatment and deaerator operations by monitoring conductivity,
dissolved oxygen, pH, phosphate dosing, and feed water quality parameters to prevent tube scaling,
corrosion, and equipment deterioration.
 Performed startup, shutdown, line-up, isolation, and changeover of steam generation equipment,
pumps, heat exchangers, and auxiliary utility systems in accordance with refinery operating
procedures and permit-to-work requirements.
 Monitored refinery steam header pressures and condensate return systems, coordinating with panel
operators to maintain stable steam distribution to process units including Crude Distillation Unit
(CDU), Vacuum Distillation Unit (VDU), Catalytic Reforming Unit (CRU), and associated offsite facilities.
 Operated centrifugal and reciprocating air compressors, instrument air dryers, receivers, and
distribution systems while maintaining instrument air pressure, dew point, and air quality
specifications required for refinery control valves and safety instrumented systems.
 Conducted field inspection of pumps, compressors, safety relief valves, pressure vessels, pipelines,
and rotating equipment, identifying abnormalities such as vibration, overheating, leaks, pressure
fluctuations, and mechanical seal failures to ensure equipment reliability and safe operation.
 Supported refinery-wide utility reliability by responding to process upsets, steam demand
fluctuations, boiler trips, condensate system abnormalities, and power disturbances, while
maintaining strict compliance with HSE standards, operational integrity requirements, and refinery
production targets.