Drag bits are available in both “Step” and “Chevron” configurations. Manufactured with high quality alloy steel, the blades are reinforced with tungsten carbide inserts.
These bits perform best in softer, unconsolidated formations (limestone sandstone – marl).
Widely used in mining, construction, exploration and water well drilling applications.
|
Diameter (inch) |
Diameter (mm.) |
Pin type |
|
1 7/8 – 2 |
47.6 – 51 |
A-ROD |
|
2 1/4 – 2 1/2 |
57-63.5 |
A-ROD |
|
2 7/8 – 3 |
73-76 |
N-ROD (4 thd./Inch) |
|
3 1/4 – 3 1/2 |
82.5 – 89 |
N-ROD |
|
3 3/4 – 3 7/8 |
95-98 |
2 3/8 A.R. |
|
4 – 4 1/4 |
101-108 |
2 3/8 A.R. |
|
4 1/2 – 4 3/4 |
114-120 |
2 3/8 A.R. |
|
5 – 5 1/8 |
127-130 |
2 3/8 A.R. |
|
5 1/2 – 5 7/8 |
140-149 |
2 3/8 A.R. |
|
6 – 6 1/4 |
152-159 |
2 3/8 A.R. |
|
6 1/2 – 6 3/4 |
165-171 |
2 3/8 o 3 1/2 A.R. |
|
7 – 7 1/4 |
178-184 |
3 1/2 A.R. |
|
7 1/2 – 7 7/8 |
190-200 |
3 1/2 A.R. |
|
8 1/2 – 9 7/8 |
216-250 |
3 1/2 o 4 1/2 A.R. |
|
11 – 12 1/4 |
280-311 |
4 1/2 o 6 5/8 A.R. |
|
14 3/4 – 17 1/2 |
375-445 |
6 5/8 A.R. |
Quadrilama
Lost in the hole drag bits
Lost in the hole drag bits are meant for special jobs when the drag bit is welded or screwed in a tube of the same diameter and the drilling rig drills up to the necessary depth.
When the job ends the drag bit and the tubes remain in the hole.
Replaceable drag bits
Used in a variety of formations and drilling applications, the replaceable blade feature allows flexibility in blade selection and easy replacement. Available in sizes from 3-7/8″ Chevron & Step through 5-5/8″ Chevron and 6-1/4″ Step. The total unit consists of a set of blades, head & bowl, and adaptor sub in a variety of pin sizes and options.
Blade Hole Opener
Designed to be used in soft/medium formations. It is a low cost method of fast penetration for large holes.
Jet grouting drag bits
These drag bits are meant for jobs of opening Jet Gruoting columns when cement is injected with pressures from 100-600 bars.
injectors can have several sizes as 45° for horizontal jet(tunnels)m or 90° for vertical or sloping jet.
“PDC” Blade Bit
A blade bit reinforced with circular plates of synthetic polycrystalline diamond for soft/medium drilling formation, greater cut resistance, increased durability.
