What you need to perform it
Primary qualification
- Engineering (chemical, petroleum, civil) or chemistry, plus the fluids company's mud school (SLB M-I SWACO, Halliburton Baroid — sector examples).
- Standardised fluids testing per API RP 13B (water- and oil-based) mastered in the rig lab.
- Valid fundamental well control (IADC/IWCF level 2 — indicative per contractor) plus BOSIET/offshore medical.
Basic STCW
- A-VI/1 (required for overnight stays)
- OPITO BOSIET current
Specific courses
- Product chemistry: viscosifiers, weighting agents, inhibitors and compatibility
- ECD management, lost circulation and treatment pills
- Hazardous substances: SDS, PPE and oil-based spills
- Solids-control equipment: shakers, centrifuges and their tuning
Indicative experience
Indicative: 1-2 years as a supervised junior mud engineer after mud school before running a well alone; HPHT and oil-based wells demand further campaigns.
Observations
Service-company personnel embedded in the operation: density recommendations are coordinated with company man and Toolpusher — the mud is a primary well-control barrier. Progression: mud engineer → senior/project fluids coordinator.
What this role does
Designs and maintains the well's drilling fluid: formulates densities and rheologies to support the wellbore and control pressure, treats the mud against contamination (gas, salt water, clays), manages the chemical stock and adjusts the system for each section. Poorly-run mud costs stuck pipe, lost circulation or an unstable well.
Typical watches
- 12 hour guards, available in critical events
Key responsibilities
- Design and maintenance of physicochemical properties of drilling fluid.
- Daily laboratory analysis: density, viscosity, pH and filtration.
- Calculation and addition of chemical additives to optimize the sludge.
- Inventory control of barite, bentonite and special additives.
- Prevention of loss of circulation and outbreaks (kick) through density control.
Operational scope
- sludge laboratory
- Mud Tanks (Mud Pits)
- Shakers area
Profile reviewed by HydroAbyss (2026). Cited rules and timeframes are indicative: the final requirement is set by the flag State, the Administration and each company.