EXCELLENT BIT PERFORMANCE IN THE APPLICATIONS OF BOGATYR KOMIR OPEN PIT
Volgaburmash provided 3 bit designs for test in the applications of Bogatyr Komir open pit (Kazakhstan):
- 171,4 (6 3/4) AIR622
- 200,0 (7 7/8) AIR532
- 215,9 (8 1/2) AIR422
Previously, the drilling crew was trained to the bits specifics and their operating conditions.
The bits were run with drill rigs DM45 and DML1200 when drilling vertical wells 4-26 m deep.
To provide maximum bit performance, Volgaburmash JSC specialists developed optimum drilling modes:
- WOB: 2000-2200 tons;
- RPM: 100-110 rpm;
- air pressure: 4,0-5,0 bar;
Currently the bit gave the performance as follows:
- 171,4 (6 3/4) AIR622 meterage 12 600 m;
- 200,0 (7 7/8) AIR532 meterage 10 560 m;
- 215,9 (8 1/2) AIR422 meterage 11 120 m;
All the bits are in working condition and will continue drilling.
According to preliminary performance, the bits meterage has already exceeded that of all other Russian manufacturers and has reached the level of bits produced in the US used at the moment, which are, however, by 2,5-3 times more expensive.
Drilling cost per meter achieved during the test let recommend these bit designs produced by Volgaburmash for further use in the applications of Bogatyr Komir open pit.
Update as of 11.12.2015
Total meters drilled by the bits are:
- 171,4 (6 3/4) AIR622 - 24 257 m;
- 200,0 (7 7/8) AIR532 - 14 434 m;
- 215,9 (8 1/2) AIR422 - 15 513 m;
According to bit analysis, the bits delivered high performance, worked faultlessly and are recommended for further use in the applications of Bogatyr Komir open pit.
Volgaburmash and Uralburmash are Russia’s largest companies producing rock-cutting tools