Operations and Maintenance Projects (Projects)
VOKE Engineering provides technical, economic and strategic advisory support for energy and industrial investment opportunities. We help clients evaluate project feasibility, assess upstream and subsurface opportunities, understand reservoir potential, and make informed decisions across the investment and asset lifecycle.
New Process Area Upgrade — Emulsion Pipeline Fabrication January 2017
Scope: Prefabrication and fabrication of the New Process Area emulsion pipeline.
Prefabrication and fabrication of the New Process Area emulsion pipeline, delivered from site survey through to LPG commissioning and handover.
Project Management & Mobilization: Site survey, engineering design, safety planning, and mobilization of personnel and materials.
Procurement & Material Management: Procurement of piping materials, valves, flanges, and structural supports, with primer coating and final UV-resistant painting for above-ground piping.
Fabrication & Installation: Prefabrication of piping spools to approved isometrics to minimize onsite welding; welding to approved Welding Procedure Specifications (WPS); installation of pipe supports at appropriate spacing to control vibration; laying of the new spur line from the Buffer Tank outlet to the Main Storage Tank inlet with isolation valves; and tie-in to the existing tanks using cold cutting and specialized hot-work precautions (nitrogen purging/inerting).
Inspection & Testing (QA/QC): NDT including Dye Penetrant Testing (DPT), hydrotesting to 1.3–1.5 times design pressure, and soap-bubble leak testing on all joints at operating pressure after nitrogen purging.
Cleaning, Coating & Commissioning: Cleaning and painting for corrosion protection; nitrogen purging to remove air before introducing LPG; and commissioning by gradual LPG introduction with leak checks before handover to operations.
Deliverables: As-built drawings, welding logs, NDT reports, hydrotest certificates, Material Test Certificates (MTCs), and a signed-off Inspection and Test Plan (ITP).
Tank Cleaning — Atlas Cove March 2017
Scope: Tank degassing, isolation, and cleaning at Atlas Cove.
Degassing, isolation, and cleaning of storage tanks at Atlas Cove, executed from decommissioning through post-cleaning inspection and re-commissioning.
Pre-cleaning & Isolation: Positive isolation of all inlet/outlet, vent, and utility lines by blinding/spading; removal of remaining product via fixed connections, vacuum trucks, or pumps; and implementation of permit-to-work (PTW) systems for hazardous area operations.
Degassing & Vapor Control: Vapor extraction using blowers and vapor recovery units to remove flammable vapors and reduce oxygen levels; nitrogen inerting/purging; and continuous testing of oxygen, LEL, and toxic gases (H₂S, benzene) to obtain gas-free, safe-for-entry certification.
Tank Cleaning & Sludge Removal: Non-man-entry cleaning using automated desludging robots (ADS) and tank cleaning cannons; high-pressure hydro jetting of internal surfaces, roof supports, and shells; sludge removal and treatment via on-site centrifugal separation or off-site thermal desorption/incineration in line with NUPRC regulations; and proper waste management of contaminated materials.
Post-Cleaning Inspection & Re-commissioning: Final interior inspection and cleaning certification confirming the tank is free of sludge, sediment, and water; preparation for API 653 inspection (bottom, shells, and weld testing); and re-isolation/re-commissioning through blind removal, valve testing, and safe handover to operational status.
Compressed Natural Gas Supply — Cowty Creek Estate January 2023
Scope: Pressure Reducing Metering Skid (PRMS) and LP & HP fittings for the Cowty Creek Estate gas supply.
Delivery and installation of a Pressure Reducing Metering Skid with LP and HP fittings for the Cowty Creek Estate gas supply, covering engineering, civil, mechanical, E&I, and commissioning.
Project Management & Engineering: Detailed engineering, lifting analysis, and submission of Material Test Certificates (MTCs), Welding Procedure Specifications (WPS), and NDT reports.
Civil & Structural Works: RCC foundation construction with anchor bolts set to the geotechnical report and soil bearing capacity; positioning, leveling, and alignment of the PRMS on the foundation; and installation of the grounding/earthing system for the skid structure and piping.
Mechanical Installation & Piping: Inlet/outlet hook-up of the HP supply line and LP downstream network; installation of HP/LP fittings including filters, pressure regulators, slam-shut valves (SSV), safety relief valves (SRV), and flow meters; piping welding to ASME B31.8 / API 1104 standards, including weldolet branch connections; and fabrication and installation of structural supports for piping and instruments.
Instrumentation & Electrical Works: Installation of pressure gauges, temperature transmitters, differential pressure transducers, and volume correctors; installation and wiring of the field-mounted flow computer with connection to the master control system; and installation of gas detection sensors and emergency shutdown (ESD) systems.
Testing & Pre-commissioning: Non-Destructive Testing (NDT), pressure testing, functional testing, and nitrogen purging and cleaning to remove moisture and debris from the piping.
Commissioning & Handover: Gas-in and leak testing with gas detectors, system optimization of the pressure regulation and metering to operating conditions, and handover of as-built drawings, final test reports, and the O&M manual.
Alternative Fuel Shed and Coal Mill December 2022
Scope: Construction of the Coal Mill rigid pavement and Power Plant (BSDG) foundation.
Civil and structural construction of the coal mill rigid pavement and the BSDG power plant foundation.
Coal Mill Rigid Pavement: Site preparation (clearing, excavation, and leveling of the coal mill area); sub-grade stabilization and soil improvement for heavy loads; installation of high-strength reinforced concrete paving designed for heavy truck movement and raw material transport; and specialized drainage systems to handle coal-handling run-off.
Power Plant (BSDG) Foundation: Geotechnical investigation to verify soil bearing capacity; installation of reinforced concrete pile foundations to support the high-vibration power plant equipment; reinforced concrete pedestal foundations for boilers, turbines, and generators; and equipment integration through embedded anchor bolts and steel plates for equipment anchorage.
Project꞉ Atlas Cove Tank Farm Rehab (NNPCL)
Scope꞉ Tank Isolation and Testing
Date꞉ March 2018
WRPC Quick Fix Repairs Project — Chemical Dosing Unit Rehabilitation February 2024
Scope: Rehabilitation of the Chemical Dosing Unit.
Rehabilitation of the chemical dosing unit under the WRPC Quick Fix Repairs Project, covering engineering, procurement, installation, and commissioning.
Engineering & Design: Technical survey and audit of the existing dosing facilities (pumps, storage tanks, and piping) to assess structural and operational integrity; engineering design of new and upgraded dosing systems, including PFDs, P&IDs, and electrical design for the instrumentation upgrade; and safety engineering to evaluate chemical storage compatibility and prevent corrosion and hazardous reactions.
Procurement: High-precision metering dosing pumps; corrosion-resistant chemical storage tanks and motor-driven agitation/mixing systems; piping, tubing, and valves compatible with caustic/acidic chemicals; and new control systems, flowmeters, level sensors, and indicators for automated dosing, aligned with modern DCS.
Installation & Construction: Safe demolition and removal of obsolete, heavily corroded pumps, tanks, and structural supports; installation of new dosing pumps, skids, and storage tanks; piping installation including suction and discharge lines, check valves, and relief valves; and E&I works covering control panels, cabling, and DCS linkage for remote monitoring and control.
Testing, Commissioning & Startup: Hydrostatic pressure testing of all new piping and connections; functional testing of dosing pumps for calibration, flow rate accuracy, and automatic control operation; performance evaluation through commissioning with chemicals to confirm optimal effluent treatment; and operator training on operation and maintenance.
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