IWCF Level 4 Drilling case studies
IWCF Level 4 Drilling · Put your knowledge to work in context.
The IWCF Level 4 Drilling Well Control certification sits within the Drilling Well Control Programme offered by the International Well Control Forum, an independent body focused on well control training, accreditation and certification. IWCF describes its accredited programmes as building the skills to manage well control safely, and states that IWCF certification is trusted worldwide for raising safety standards. The IWCF Level 4 Drilling case studies are 5 cases and about 4,249 words.
1Wet trip on a deviated well: strip, pull or circulate?
While pulling out of a deviated development well the crew has pulled 18 stands of 5 in drill pipe from a 12¼ in hole at 12,900 ft MD / 12,500 ft TVD. Mud weight is 12.2 ppg and the trip tank is checked on every stand.
817 words, about 4 min2Shallow gas under the diverter with a restricted vent line
At 06:20 the 17½ in surface hole is at 1,900 ft MD/TVD, drilled with 9.8 ppg spud mud below 26 in conductor set at 300 ft. No BOP is installed; the well is protected by a diverter with 12 in vent lines to port and starboard.
837 words, about 4 min3Losses at the shoe while the kill is still in progress
The 8½ in hole is at 14,200 ft MD / 13,000 ft TVD when a 14 bbl gain is taken. Mud weight is 13.2 ppg and shut-in pressures stabilise at SIDPP 520 psi and SICP 760 psi.
886 words, about 4 min4Flow while running casing, before the string is landed
The 9⅝ in casing is being run in a 12¼ in hole to 12,000 ft TVD. Mud weight is 14.2 ppg, the 13⅜ in shoe is at 8,000 ft with an LOT of 16.0 ppg equivalent, and the stack is a 13⅝ in 10K with 5 in pipe rams, 9⅝ in rams, a 5–9⅝ in variable bore ram and an annular.
903 words, about 5 min5Gas migration during a five-hour weight-up
The 8½ in hole is at 15,500 ft MD / 14,000 ft TVD when a 20 bbl kick is shut in. Mud weight is 14.5 ppg and pressures stabilise at SIDPP 480 psi and SICP 720 psi.
806 words, about 4 min