Most well control training covers the Volumetric Method as a formula: pump in, bleed off, repeat, holding casing pressure inside a defined margin while a kick migrates with the well shut in and no circulation available. On paper it’s a checklist. In practice, one real kill that went this way ran for roughly 48 hours, and the hardest part of it wasn’t the arithmetic.
Why volumetric, not one of the standard circulating methods
The well was stuck — no ability to pump down the string and circulate normally, which rules out the Driller’s Method and Wait and Weight both. With circulation off the table, the only way to manage a migrating influx was volumetric: bleed a controlled amount of mud off the annulus as the kick expands, holding casing pressure inside its allowed range the entire time, without ever regaining full circulation.
The disagreement that actually mattered
Once circulation was restored enough to get kill mud back over the bit, there was a real disagreement about how to finish the job. The company man on site wanted to pump a small amount of kill mud, shut back in, wait, and repeat that in increments. The reasoning was caution — go slow, check pressures often, take it in small steps.
The call that was actually made, working with the rig manager at the time, was different: kill it with the driller’s method through one full circulation before pumping the kill-weight mud down. Rather than incremental small pumps and repeated shut-ins, get one clean circulation established first, then commit to displacing with the kill mud in a single, controlled pass.
That was the judgment call — not a step in a manual, a decision made under real pressure about which approach actually reduces risk versus which one only feels more cautious. Incremental pump-and-shut-in cycles mean repeatedly disturbing a well that’s already fighting you, with more opportunities for something to go wrong at each restart. One full circulation, done right, is fewer transitions and fewer chances to lose control of the sequence.
What made it one of the toughest kills
Roughly 48 hours between the two people running it — the rig manager and the account behind this post — trading a well that would not cooperate with a straightforward answer. No single dramatic moment made it hard; it was the length of it, the repeated pressure checks, and holding to a plan under a company man’s pushback for a slower, more fragmented approach that would have meant more restarts, not fewer risks.
The takeaway
The Volumetric Method itself is a formula anyone can learn from a kill sheet. What it doesn’t teach is that once you’re back in a position to circulate, the choice of how to finish — incrementally versus committing to one full pass — is itself a real decision with real trade-offs, made by the people on site with the well in front of them, not by the checklist alone.
See the kill sheet calculator for the arithmetic behind the Driller’s Method and Wait and Weight, and Driller’s Method and Wait and Weight: Common Mix-Ups for where the two get confused with the Volumetric Method. This account is reviewed and told firsthand by Jabin Travis — see his full background.