Imperial Dimensions
| Body | Blade Size | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Tool Series | Body OD (in) |
Connection (in) |
Weight W/O Blades (kgs) |
Length (in) |
# of Blades |
A (in) |
B (in) |
C (in) |
D (in) |
| mrk-4 | 4-1/2" | 2-7/8” IF Box X Box |
48" | 5 | 12" | 14" | 16" | 18" | |
| mrk-6 | 6-1/2" | 4-1/2” IF Box X Box |
60" | 5 | 14" | 16" | 18" | 20" | |
| Body | Blade Size | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tool Series | Body OD (in) |
Connection (in) |
Weight W/O Blades (kgs) |
Length (in) |
# of Blades |
A (in) |
B (in) |
C (in) |
D (in) |
E (in) |
F (in) |
G (in) |
| mrk-8 | 8" | 6-5/8” REG B x B | 60" | 5 | 18" | 20" | 22" | 24" | - | - | - | |
| mrk-9 | 9" | 6-5/8” REG B x B | 84" | 6 | 24" | 26" | 28" | 30" | 32" | 34" | 36" | |
| mrk-10 | 10" | 6-5/8” REG B x B | 98" | 9 | 36" | 38" | 40" | 42" | 44" | 46" | 48" | |
Metric Dimensions
| Body | Blade Size | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Tool Series | Body OD (mm) |
Connection (mm) |
Weight W/O Blades (kgs) |
Length (mm) |
# of Blades |
A (mm) |
B (mm) |
C (mm) |
D (mm) |
| mrk-4 | 114.30 | 73.03 IF Box X Box |
1219.20 | 5 | 304.8 | 355.6 | 406.4 | 457.2 | |
| mrk-6 | 165.10 | 114.30 IF Box X Box |
1524.00 | 5 | 355.6 | 406.4 | 457.2 | 508.0 | |
| Body | Blade Size | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tool Series | Body OD (mm) |
Connection (mm) |
Weight W/O Blades (kgs) |
Length (mm) |
# of Blades |
A (mm) |
B (mm) |
C (mm) |
D (mm) |
E (mm) |
F (mm) |
G (mm) |
| mrk-8 | 203.20 | 171.45 REG B X B |
1524.00 | 5 | 457.2 | 508 | 558.8 | 609.6 | - | - | - | |
| mrk-9 | 228.60 | 171.45 REG B X B |
2133.60 | 6 | 609.6 | 660.4 | 711.2 | 762 | 812.8 | 863.6 | 914.4 | |
| mrk-10 | 254.00 | 171.45 REG B X B |
2489.20 | 9 | 914.4 | 965.2 | 1016 | 1067 | 1118 | 1168 | 1219 | |
Operation Specifications
NOTE: The suggested weights and RPM’s are only a recommended guide. Weights and RPM’s should be adjusted to maximum penetration rates. They will vary with formation and rig power. It will also depend on the size of or step you are taking.
| Tool Series | Pilot Hole | Opening Size | WOB (lbs) | RPMs | # of Blades | Body OD (in) |
Threads Box X Box |
| MRK-4 | 5-7/8” | 12” - 18” | 15000-20000 | 40-70 | 5 | 4-1/2” | 2-7/8” IF |
| MRK-6 | 7-7/8” | 14” - 20” | 15000-20000 | 40-70 | 5 | 6-1/2” | 4-1/2” IF |
| MRK-8 | 9-5/8” | 18” - 24” | 15000-20000 | 40-70 | 5 | 8 | 6-5/8” REG |
| MRK-9 | 10-5/8” | 24” - 36” | 20000-25000 | 40-60 | 6 | 9 | 6-5/8” REG |
| MRK-10 | 10-5/8” | 36” - 48” | 20000-25000 | 40-55 | 9 | 10 | 6-5/8” REG |