What does a mechanical technician do in oil and gas?

Mechanical Technician (Oil & Gas)

Frontline craft professional responsible for safe, precise maintenance, overhaul, and commissioning of rotating and static mechanical equipment to ensure production reliability and mechanical integrity across upstream, midstream, and downstream assets.

I. Core Responsibilities

• 1.1 Preventive maintenance on pumps, compressors, turbines, gearboxes, fans, mixers, valves, heat exchangers, and mechanical packages per CMMS plans and OEM specs.
• 1.2 Corrective maintenance & troubleshooting of mechanical failures (vibration, misalignment, seal/packing leaks, cavitation, bearing distress, overheating, lube issues).
• 1.3 Precision maintenance: laser/dial alignment, soft-foot correction, critical torquing/tensioning, bearing fits, seal setting, coupling assembly, runout checks.
• 1.4 Condition monitoring: basic vibration/temperature/ultrasound data collection, oil sampling, and first-level trend interpretation; escalate anomalies.
• 1.5 Turnarounds/shutdowns: execute isolation (LOTO), disassembly/inspection, overhauls, flange management, hydrostatic testing, reinstatement, punch-list closure.
• 1.6 Installation & commissioning of mechanical skids and auxiliaries (lube oil systems, seals, filters); assist with cold/warm runs and performance checks.
• 1.7 Mechanical integrity tasks: leak testing, flange joint assembly to standards, support for NDT teams (MPI/DPI/UT) on static equipment.
• 1.8 Work management: execute work orders, complete job cards, capture as-found/as-left data, redline drawings, and feedback to planners/reliability.
• 1.9 Spares & tooling control: kitting, BOM checks, parts inspection, consumable management, and tool calibration verification.
• 1.10 HSE compliance: PTW participation, job safety analysis, confined-space/working-at-heights protocols, housekeeping (5S), and stop-work authority.
• 1.11 Emergency response: mobilize for critical equipment failures and production threats; support root-cause data capture.

II. Required Skills & Physical Demands

II.A Technical Skills

• 2.1 Mechanical fundamentals: rotating equipment internals, seals/bearings, couplings, lubrication systems, hydraulics/pneumatics, and static equipment hardware.
• 2.2 Drawing literacy: P&IDs, isometrics, GA drawings, tolerances/clearances, materials and torque tables, OEM manuals.
• 2.3 Precision practices: alignment, soft-foot checks, interference/transition fits, surface finish handling, flange assembly sequences.
• 2.4 Diagnostics: symptom-to-cause logic for imbalance, misalignment, looseness, resonance, cavitation, thermal growth, lubrication starvation/contamination.
• 2.5 Rigging & lifting: safe selection of slings, shackles, hoists, and load control with taglines; center-of-gravity awareness.
• 2.6 CMMS/EAM use: work orders, parts reservations, close-out coding, failure modes entry, and feedback loops.
• 2.7 QA/QC: dimensional checks, witness points, tool certification checks, pressure test acceptance and documentation.

II.B Reference Formulas (Applied)

• 2.8 Torque/preload: \(T = K \, F \, D\) where \(T\) = torque, \(K\) = nut factor (˜0.18–0.25), \(F\) = bolt preload, \(D\) = nominal diameter. Also \(T = F \, r\) (lever arm torque).
• 2.9 Pump affinity laws: \(\frac{Q_2}{Q_1} = \frac{N_2}{N_1}, \quad \frac{H_2}{H_1} = \left(\frac{N_2}{N_1}\right)^2, \quad \frac{P_2}{P_1} = \left(\frac{N_2}{N_1}\right)^3\).
• 2.10 NPSH available: \(\mathrm{NPSH}_\mathrm{a} = \frac{P_\mathrm{atm}}{\rho g} + z_\mathrm{suction} - \frac{P_\mathrm{vapor}}{\rho g} - h_f\).
• 2.11 Thermal growth: \(\Delta L = \alpha \, L \, \Delta T\) for setting cold alignment targets.
• 2.12 Speed–frequency: \(f \,(\mathrm{Hz}) = \frac{\mathrm{RPM}}{60}\) for vibration interpretation (1×, 2×, BPFO/BPFI as applicable).

II.C Soft Skills

• 2.13 Safety leadership: hazard recognition, JSA quality, clear permits, conscientious lock-out/tag-out.
• 2.14 Communication: precise shift handovers, clear findings to supervisors/operations, vendor interfacing.
• 2.15 Teamwork & planning: coordinate with operations for start/stop windows; collaborate during outages with multi-craft crews.
• 2.16 Documentation discipline: accurate measurements, torque values, clearances, and as-left condition in job packs.

II.D Physical Demands

• 2.17 Manual handling: lifting/maneuvering components up to 25–35 kg (with aids as required), awkward postures.
• 2.18 Access & environment: climbing ladders/stairs, confined spaces, elevated work, hot/cold areas, high noise, hydrocarbons/Chemical exposure.
• 2.19 Shifts: extended 10–12 hour shifts during call-outs/turnarounds; fit-for-duty requirements.
• 2.20 PPE: FR clothing, gloves, eye/face/hearing protection, respiratory protection as required; EX-rated devices in hazardous zones.

III. Typical Tools, Software, and Equipment

• 3.1 Hand & power tools: torque wrenches, hydraulic torque/tensioners, impact drivers, pullers, bearing heaters/induction, presses, extractors.
• 3.2 Measurement & alignment: laser alignment systems, dial indicators, feeler gauges, micrometers, borescopes, straightedges, taper gauges.
• 3.3 Condition monitoring: handheld vibration data collectors, accelerometers, IR thermography cameras, ultrasonic detectors, tachometers/strobes.
• 3.4 Lube & cleanliness: grease guns, single-point lubricators, oil filtration carts, particle counters, sampling kits.
• 3.5 Pressure & leak testing: calibrated gauges, deadweight testers, hand pumps, manometers, pressure relief test rigs.
• 3.6 Rigging & lifting: chain hoists, come-alongs, jacks, spreader bars, slings, shackles, load cells.
• 3.7 Fabrication aids: saws, grinders, threading/cutting tools, pipe stands, alignment/jacking screws.
• 3.8 CMMS/EAM: enterprise maintenance systems (e.g., preventive maintenance, work orders, parts reservation, time confirmation).
• 3.9 Digital enablement: intrinsically safe tablets, digital permit-to-work systems, drawing/P&ID viewers, spreadsheets for trend logbooks.

IV. Work Environment

• 4.1 Locations: onshore plants (gas processing, refineries, terminals, pipelines, power generation) and offshore assets (fixed platforms, FPSOs, jack-ups).
• 4.2 Rotations/shifts: onshore 5–2 or 4–3 days; outages 6–1 or 7–0 temporarily; offshore common 14–14, 21–21, or 28–28 (10–12 hours/day).
• 4.3 Mobility: site-to-site travel for call-outs/turnarounds; offshore requires helo/boat transfer and survival certification.
• 4.4 Hazardous areas: Zone-rated environments with ignition controls; strict SIMOPS coordination during concurrent operations.
• 4.5 Operational tempo: steady-state PMs punctuated by urgent corrective work and periodic major shutdown activity.

V. Reporting Lines & Cross-Functional Interfaces

• 5.1 Reports to: Mechanical Supervisor or Maintenance Supervisor (area-specific) within the asset maintenance organization.
• 5.2 Cross-functional interfaces: Operations (permits, start/stop), Electrical/Instrumentation, Reliability/Rotating Engineers, Planning/Scheduling, Warehouse/Logistics, HSE, Inspection/NDT, OEM field service, and third-party contractors.
• 5.3 Handoffs/deliverables: completed work orders and close-out notes to planners; alignment/torque records to QA; condition data to reliability; reinstatement certificates to operations; parts requisitions to procurement/warehouse.
• 5.4 Permit & isolation coordination: Control Room, Area Authority/Isolating Authority for PTW/LOTO; SIMOPS meetings for clash resolution.

VI. Career Ladder

• 6.1 Progression path (estimated): Trainee ? Mechanical Technician ? Senior Mechanical Technician ? Lead Mechanical Technician ? Mechanical Supervisor ? Maintenance Superintendent ? Maintenance Manager/Asset Maintenance Lead.
• 6.2 Specialist tracks: Rotating Equipment Specialist, Condition Monitoring/CBM Technician, Reliability Technician, Planner/Scheduler, Mechanical Inspector, Commissioning Technician, OEM Field Service Technician.
• 6.3 Requirements to advance (estimated): competency sign-offs, strong PM/CM performance, outage leadership, CMMS proficiency, and targeted training (e.g., alignment and bolting standards, flange management, rigging/lifting, confined space, H2S, EX awareness).
• 6.4 Certifications (role-relevant): API 686 (machinery installation/alignment), vibration analysis ISO 18436 Cat I–II, rigging/slinging certifications, flange management standards, pressure testing competence, offshore survival (for offshore roles).
• 6.5 Progression trigger (estimated): promotion to Senior after ~8–12 hitches or 18–30 months + demonstrated precision maintenance competency; to Lead after ~3–5 years + outage leadership + API 686; to Supervisor after ~6–8 years + planning/scheduling exposure and strong safety performance.