IWCF Level 4 Drilling study plan

Define primary well control barriers and classify each barrier as mechanical, hydrostatic, or procedural, writing a one-line failure mode for each

Explain the relationship between formation pore pressure, fracture pressure, and mud weight, and calculate overbalance in psi and ppg for five worked scenarios

Convert between mud weight units (ppg, kg/m3, SG, psi/ft) without reference material, completing 20 conversion drills at 90% accuracy

Draw and label a casing shoe pressure profile showing pore pressure, fracture gradient, and mud hydrostatic line

Calculate hydrostatic pressure, equivalent circulating density, and annular pressure losses for vertical and deviated well geometries

Derive bottom hole pressure during static, circulating, and shut-in conditions and state which component changes in each case

Compute slow circulating rate pressures and explain how they are used to build a kill-weight mud schedule

Solve 15 hydrostatic and ECD problems under timed conditions with full working shown

Identify kick indicators during drilling, tripping, and static periods and rank them by reliability

Describe the sequence of actions to shut in a well on a floating rig and on a land or jack-up rig, including space-out and soft shut-in steps

Explain the physical mechanism behind each indicator (flow check, pit gain, pressure changes, gas expansion) rather than memorizing the list

Compare hard versus soft shut-in and justify the preferred method for given well conditions

Record and interpret shut-in drill pipe pressure, shut-in casing pressure, and pit gain on a kill sheet

Calculate formation pressure, kill mud weight, and initial and final circulating pressures from shut-in data

Distinguish between the drill pipe and casing pressure gauges as indicators of formation pressure and of choke adjustment

Identify common kill sheet errors and explain the operational consequence of each

Work through the driller's method step by step, stating the pressure held constant at each stage and why

Work through the wait and weight method and compare its pressure schedule and time profile with the driller's method

Calculate initial circulation pressure, final circulation pressure, and kill mud arrival at the bit for both methods

Explain when each method is preferred and what constraints (rig time, choke capacity, kick tolerance) drive the choice

Describe choke operating principles, including manual versus automatic chokes and the effect of choke response on bottom hole pressure

Explain the behaviour of gas, oil-based mud, and saltwater influxes in the annulus and how each changes casing pressure during circulation

Analyze well control complications such as lost circulation, plugged choke or bit, and trapped pressure, and state the corrective action for each

Interpret annular pressure while drilling and kick tolerance concepts in the context of well design limits

Complete a full-length timed practice paper covering all drilling well control topics under exam conditions

Review every incorrect answer and trace it to a specific knowledge gap or calculation error

Re-drill weak calculation types until three consecutive correct attempts are achieved per type

Practice reading and answering scenario-style questions that combine pressure data with procedural decisions

Consolidate all calculation types into a single one-page formula sheet from memory, then verify against notes

Rehearse kick detection, shut-in, and kill method sequences aloud as if briefing a crew

Retake a second full timed practice paper and compare scores with week 7

Review only flagged weak areas and confirm each is resolved before exam day