The scale deposits increased in thickness across the depths from 5,905 – 7,717 ft (1,800-2,352 m), but at 6,565 ft (2,000 m) the caliper log revealed a homogeneous scale build-up with a consistent ID of 5.5”.
The 7” Well Cutter was run in hole to 6,717 ft (2,047 m) depth before correlating and positioning the tool at 6,565 ft (2001 m). The well was then pressured up slightly (<500 psi) and the cut performed flawlessly or as the operator said: “A cut worthy of a king!” Total time to cut the tubing was three hours, which included getting through the scale.
This was the first time the Well Cutter was intentionally used to cut through scale and clearly demonstrates the capability for the Well Cutter to accomplish its job in this environment.
The achievements also include a string of benefits to operators worldwide. Obviously, time is optimized by eliminating one (or more) run plus the associated mobilization and rigging up of scale milling equipment, which is especially valuable for offshore operations. In total, the operator saved approximately 75% of the costs by performing the entire operation on e-line compared to a rig-based operation.
WELL TYPE: OIL PRODUCER
MAX. DEVIATION: 20°
MAX. DEPTH: 6,591 ft MD (CUTTING DEPTH)
MAX. TEMPERATURE: 176°F (80° C)