Successful bench tests
Bench tests were carried out for milling 4 windows from one mark in a section of a casing pipe with a diameter of 139.6 mm made of high-quality steel (C95). During the tests, the layout of the Punch hole with a 75 mm milling cutter and a special screw downhole motor were used.
The length of the milled “window” is up to 800 mm;
The average milling time is 7.5 hours;
The average penetration speed is 8.1 cm / h.< / p>