IWCF Level 3 DWC case studies

IWCF Level 3 DWC · Put your knowledge to work in context.

The IWCF Level 3 Drilling Well Control (DWC) credential sits within the International Well Control Forum's Drilling Well Control Programme, one of the programmes listed on the IWCF website alongside Well Intervention Pressure Control, Enhanced Well Control and the Level 1 Well Control Awareness course. The IWCF describes itself as an independent body focused on well control training, accreditation and certification, setting training standards, with a network of more than 250 members, operations in more than 60 countries and more than 280 accredited centres. The IWCF Level 3 DWC case studies are 5 cases and about 3,715 words.

Kick While Drilling a Vertical Well: Kill Sheet and Pump Start-Up

At 03:40 the driller is drilling ahead at 9,850 ft (vertical well, so MD equals TVD) with 12.4 ppg water-based mud when the return flow increases and the pit level rises 15 bbl in six minutes. The pumps are stopped and the well is shut in hard; the gauges stabilise at SIDPP 420 psi and SICP 590 psi.

763 words, about 4 min 2

Trip Tank Anomaly: Kick With the Bit Off Bottom

While pulling out of the hole on a trip at 9,800 ft TD (vertical) with 12.8 ppg mud, the crew has pulled 15 stands of 93 ft, putting the bit at 8,405 ft. The trip tank shows 8 bbl of fill taken against an expected 0.9 bbl per stand.

727 words, about 4 min 3

Losses Followed by a Kick: Kill Weight Against a Thief Zone

You are drilling at 13,400 ft MD / 12,600 ft TVD with 14.2 ppg mud at 650 gpm when the pit drops 45 bbl in 12 minutes. The pumps are stopped and within 8 minutes the well is flowing and the trip tank shows 18 bbl.

731 words, about 4 min 4

Gas Migration While Waiting on Kill Mud

At 08:10 the well is shut in after a kick taken while drilling at 11,200 ft MD/TVD with 12.4 ppg mud. The 9-5/8 in shoe is at 8,000 ft TVD with a leak-off test of 15.5 ppg.

731 words, about 4 min 5

Deviated Well: MD Against TVD in the Kill Sheet

A deviated well is being drilled: 12-1/4 in hole at 14,800 ft MD and 10,200 ft TVD, with the 9-5/8 in shoe at 8,500 ft TVD and a leak-off test of 13.8 ppg. The mud is 11.6 ppg, the standpipe pressure is 2,200 psi at 550 gpm, and the well kicks with a 20 bbl pit gain.

763 words, about 4 min