Study WellSharp Drilling Operations by practicing decisions, not answers. IADC's centralized exam database pulls from thousands of categorized questions with shuffled answer choices, so memorizing a fixed list cannot cover your exam. Instead, drill the decisions your role owns: when to shut in, which pressure indicates what, how to build a kill sheet from pre-recorded data, and how subsea stacks change the numbers. Work the scenarios in this guide by hand, then use the timed kill sheet exercise and readiness checks to confirm you can produce results unaided.
Why IADC's centralized question bank changes how you should study
WellSharp uses a centralized online testing system: questions are categorized by learning objective and difficulty, answer choices are shuffled, and each candidate receives a unique exam drawn from a large bank.
IADC describes a question bank exceeding 3,300 items, with workgroups periodically altering measurement parameters so questions stay current. This design exists precisely so instructors cannot teach to a known test and trainees must demonstrate the underlying well control concepts. Practicing recycled question-and-answer pairs from unofficial sources is therefore a weak strategy; the productive equivalent is drilling the concept behind each option until you can explain why the distractors are wrong.
Convert that into a study loop: for every topic, write the term, the calculation or procedure it drives, and the decision it supports. For example, slow circulating rate pressure is not trivia; it is the second term of your initial circulating pressure. Use IADC's published sample exams to calibrate to question style, and treat any missed item as a concept gap to close, not a bad luck draw. After the real exam, you review missed questions immediately and can request an expert panel review of any item you believe is flawed.
Driller versus Supervisor and surface versus subsea: which decisions are yours
WellSharp Drilling Operations is delivered in role- and stack-specific variants: Driller and Supervisor levels, each for Surface Stack, Subsea, or Combined Surface and Subsea, with position-specific learning objectives.
The program's stated goal is position-specific comprehension and demonstrated skills, so your exam assesses the decisions your role owns. In broad terms, the driller executes choke operations and monitoring from the driller's station, while the supervisor sets strategy: kill method selection, coordination, and authorization decisions. Study the boundaries of your role explicitly. If your ticket is Driller Surface Stack, you should be fluent in pump and choke manipulation and pressure interpretation; if you are preparing for Supervisor, add method selection and team coordination reasoning on top of the shared core.
The stack variant changes the physics you are tested on. A subsea stack sits below the flowline, so choke line friction adds a pressure term and riser margin reduces the casing pressure you can safely allow at the shoe. A kill sheet habit built only on surface assumptions will carry a silent error into subsea questions. Mini-exercise: list every number on your kill sheet and annotate, line by line, whether it changes on a subsea well and why. Anything you cannot annotate is a gap to fill before your course.
Shut-in timing: acting on a flow check before pressure data confirms the kick
A positive flow check confirms influx, and standard well control practice is to shut in promptly on that confirmation rather than waiting for drill pipe pressure to climb, because the influx grows while you wait.
Worked scenario: while drilling, the flow show trips, the pit gain rises, and you stop the pump and pick up. On the flow check, the well is flowing. A plausible mistake is to hold off, reasoning that drill pipe pressure has not yet risen, and to keep circulating to 'see if it develops'. That reads the wrong indicator: after pump shutdown, pressures take time to reflect downhole conditions, and the influx keeps expanding during the delay. The better decision is to shut in the well per the approved procedure, record SIDPP, SICP and pit gain, and notify the supervisor. Why it matters: a smaller, earlier-shut-in influx means lower casing shoe pressures and a simpler kill.
Sharpen this with the named concepts behind it. A hard shut-in closes the annular or rams on a stationary, non-circulating well; a soft shut-in opens the choke first and closes against flow, trading a small additional influx for reduced shut-in pressure shock, where company policy requires it. Know which procedure your organization specifies, because scenario answers depend on the stated policy. Also distinguish confirmed indicators (pit gain, well flowing with pumps off) from weaker signals (drilling breaks, pump pressure fluctuation) that justify a flow check first, not an immediate shut-in.
Kill sheet arithmetic: building ICP, FCP and MAASP from pre-recorded data
Initial circulating pressure equals shut-in drill pipe pressure plus slow circulating rate pressure; final circulating pressure is the slow circulating rate pressure with kill mud; MAASP limits casing pressure using the shoe's true vertical depth.
Worked example (simplified, labeled numbers only): the well is vertical, with the shoe at 8,000 ft TVD and the bit at a total depth of 10,000 ft TVD. Pre-recorded slow circulating rate pressure at kill rate is 600 psi. After shut-in, SIDPP is 500 psi and SICP is 700 psi. Current mud is 10.0 ppg; the fracture gradient at the shoe is 0.65 psi/ft. Then ICP = 500 + 600 = 1,100 psi. Kill mud weight = 10.0 + 500 / (0.052 x 10,000) = about 11.0 ppg. FCP is the slow circulating rate pressure with kill mud in the hole, approximately 600 x 11.0/10.0 = 660 psi. MAASP = (0.65 - 0.52) x 8,000 = 1,040 psi.
The plausible mistake here is computing MAASP with the bit's total depth instead of the shoe's true vertical depth, which would overstate the casing pressure you can tolerate before loading the shoe. A second common slip is controlling the kill on casing pressure; with a conventional drill pipe kill, drill pipe pressure is the primary gauge because it reads a known mud column to the bit. Build every kill sheet from your own pre-recorded data, and never recalibrate mid-kill from shifting gauges unless the plan calls for it.
Surface versus subsea: the adjustments that change your numbers and decisions
A subsea stack introduces choke line friction and riser margin: choke line friction affects circulating pressures, and riser margin reduces the maximum allowable surface casing pressure compared with a surface stack.
Because the BOP sits on the seabed, the mud column above the stack is partly riser rather than sealed wellbore. Under common subsea practice this means the maximum allowable casing pressure at surface is lower than the surface-stack figure for the same shoe, and choke line friction means the pressure you read at surface is not identical to the pressure at the stack. Courses approved as Combined Surface and Subsea Stack expect you to know when and how these terms enter the calculations, not just that they exist.
Worked scenario, continuing the Section 4 example: on the subsea version of the same well, a plausible mistake is submitting the surface MAASP of 1,040 psi as the subsea limit and planning choke responses against it. The better decision is to recompute the allowable casing pressure accounting for riser margin and to interpret circulating pressures with choke line friction in mind, then state the adjusted limit before the kill begins. Why it matters: if the subsea limit is the binding constraint, planning against the larger surface number could permit shoe breakdown pressures you never intended. Use the table below as a pre-course self-audit.
| Factor | Surface stack assumption | Subsea adjustment | Decision impact |
|---|---|---|---|
| Mud column reference | Mud to flowline at surface | Riser portion above the stack is not a sealed wellbore column | Recalculate allowable casing pressure with riser margin before the kill |
| Circulating pressure reading | Gauge pressure reflects choke at surface | Choke line friction adds a loss term between stack and gauges | Interpret choke and pump pressures with the friction term identified |
| Kill sheet lines | Standard surface set | Additional lines for riser margin and stack-related data | Annotate every line so you know which values differ subsea |
| Shut-in procedure | Hard or soft shut-in per policy | Same choice, executed at the subsea stack with sequence awareness | Follow the stated policy and stack closing sequence |
| Primary kick indicator | Pit gain and flow with pumps off | Same indicators, monitored with subsea-specific instrumentation | Confirm influx on a flow check before shutting in |
A timed kill sheet and shut-in narration drill, with a self-check rubric
WellSharp Drilling Operations courses devote a required share of course time to simulation and include a simulator skills assessment, so practice should reproduce that format: produce numbers and narrate decisions under time pressure.
The exercise: invent a plausible vertical well, pre-record a slow circulating rate pressure, set a kick with a chosen SIDPP and SICP, and complete a full kill sheet unaided in fifteen minutes, including kill mud weight, ICP, FCP and MAASP. While the timer runs, narrate your first three actions after a positive flow check out loud, in your role. Then redo the same exercise as a Combined subsea candidate, adding riser margin and choke line friction reasoning. Expected observations on a first attempt: hesitation on MAASP basis depth, and narration that jumps from 'shut in' to 'start killing' without the intermediate steps of recording pressures and briefing the supervisor.
Score yourself with this rubric, one point per item, and treat the total as a learning milestone rather than a pass prediction: (1) kill mud weight within a tenth of a ppg of a clean hand calculation; (2) ICP and FCP each within 50 psi of your hand check; (3) MAASP uses the shoe TVD and, on the subsea pass, the adjusted limit; (4) narration names the indicator that justified shutting in; (5) the first three post-shut-in actions are in the right order for your role. Repeat the drill with new invented numbers until you hold four points or better on both passes without notes.
An adaptable preparation sequence and concrete readiness checks
Build a five-step sequence over several weeks: refresh core concepts, master the kill sheet by hand, add subsea adjustments, rehearse role-specific decision narration, then close with sample exams and a full timed drill.
A realistic sequence you can compress or stretch: week one, rebuild fundamentals, pressure concepts, U-tube behavior, kick indicators, shut-in procedures, writing each as term-plus-decision. Week two, kill sheet arithmetic from invented pre-recorded data until you no longer need a worked reference. Week three, subsea adjustments and the Section 5 table audit. Week four, timed narration drills from Section 6 plus role-boundary review for Driller versus Supervisor decisions. Final stretch, IADC's published sample exams, then one complete timed kill sheet and narration pass per stack variant. If you are enrolling in a provider course, this sequence primes you for the classroom and simulator rather than replacing them.
Readiness checks before your exam date: you can complete a correct kill sheet unaided in fifteen minutes for both stack types; you can state, in your role, the first three actions after a positive flow check without hesitating; you can explain why drill pipe pressure is the primary control gauge in a conventional drill pipe kill; you can articulate the subsea corrections to MAASP and circulating pressure interpretation; and you are consistently clearing the Section 6 rubric. One administrative note: confirm current course formats, schedules, provider accreditation status and fees directly with IADC or your accredited training provider, since program details change.
References and further reading
Use these references to explore the concepts and check the latest information from the relevant organizations.