Overburden Drilling Pipe and Accessories
The OD Drilling System is available in the following sizes:
Also shortened to OD
Drilling, overburden drilling is designed to handle tricky drilling and
its performance is not impaired by any changes in the formation ranging
from loose soil stratum to homogenous rock. The method cuts straight
through stones and boulders or shoulders them aside. The variety
encounted in overburden formations, often unstable, makes overburden
drilling one of the most difficult types of drilling there is.
Typical situations where OD Drilling is at its best:
The bit drills the bottom of the hole. As rotation commences, the bit widens the hole and cuts a passage for the smooth descent of the casing. Cuttings are flushed upwards inside the casing tubes.
On completion of the drilling, the equipment is put into reverse and passes upward though the casing tubes.
Standard drilling equipment such as rock bits are used for continued drilling through the casing tubes once the solid bed rock has been reached.
Casing tubes can be left in position to stabilize the hole or withdrawn after the installation of cables, plastic tubes, or other equipment.
Typical situations where OD Drilling is at its best:
- Drilling holes in civil engineering projects:
- anchoring
- grouting
- pipe and cable - laying through highways and railway embankments
- drilling blast holes without soil removal
- Mineral Prospecting:
- pilot holes for diamond drilling
- sampling cuttings
- sampling soil
- overburden thickness studies
- water table studies
- Drilling water wells
- casing from surface down to rock bed
- casing all through unstable formations
- exclusion of upper water layers, which are frequently polluted
The bit drills the bottom of the hole. As rotation commences, the bit widens the hole and cuts a passage for the smooth descent of the casing. Cuttings are flushed upwards inside the casing tubes.
On completion of the drilling, the equipment is put into reverse and passes upward though the casing tubes.
Standard drilling equipment such as rock bits are used for continued drilling through the casing tubes once the solid bed rock has been reached.
Casing tubes can be left in position to stabilize the hole or withdrawn after the installation of cables, plastic tubes, or other equipment.
- 102 mm
- 114 mm
- 133 mm
- 152 mm
A. Adapter Heads
Adapter Heads fit in the end of the pipe while a striking bar is screwed into the top. Adapter heads can be made with T38, T45, or T51.
| Size Chart for Adapter Heads |
|||||
| Thomas Part # |
Size |
Diameter |
Hole
Size |
ID | OD Bit |
| TOD102AH38 |
102 |
4 |
38 |
2.95 | 4.5 |
| TOD102AH45 |
102 |
4 |
45 |
2.95 | 4.5 |
| TOD114AH38 |
114 |
4.5 |
38 |
3.46 | 5 |
| TOD114AH45 | 114 |
4.5 |
45 |
3.46 | 5 |
| TOD133AH38 | 133 |
5.25 |
38 |
4.25 | 5.75 |
| TOD133AH45 | 133 |
5.25 |
45 |
4.25 | 5.75 |
| TOD133AH51 | 133 |
5.25 |
51 |
4.25 | 5.75 |
| TOD152AH38 | 152 |
6 |
38 |
5 |
6.5 |
| TOD152AH45 | 152 |
6 |
45 |
5 |
6.5 |
| TOD152AH51 | 152 |
6 |
51 |
5 |
6.5 |
B. Pipe
Pipe for overburden drilling systems come in 3, 6, and 9 foot lengths.
| Size Chart for Pipe |
|||||
| Thomas Part # |
Size |
Diameter |
Hole Size |
ID |
OD
Bit |
| TOD102ET3 |
102 |
4 |
3" |
2.95 |
4.5 |
| TOD102ET6 | 102 |
4 |
6" |
2.95 |
4.5 |
| TOD102ET9 | 102 | 4 |
9" | 2.95 |
4.5 |
| TOD114ET3 |
114 |
4.5 |
3" |
3.46 |
5 |
| TOD114ET6 | 114 |
4.5 |
6" |
3.46 |
5 |
| TOD133ET1.5 | 133 |
5.25 |
1.5" |
4.25 |
5.75 |
| TOD133ET3 | 133 |
5.25 |
3" |
4.25 |
5.75 |
| TOD133ET6 | 133 |
5.25 |
6" |
4.25 |
5.75 |
| TOD152ET3 |
152 |
6 |
3" |
5 |
6.5 |
| TOD152ET6 |
152 |
6 |
6" |
5 |
6.5 |
C. Coupling
Couplings for overburden drilling systems come in sizes 102, 114, 133, or 152 mm.
| Size Chart for Couplings |
||||
| Thomas Part # |
Size |
Diameter |
ID |
OD
Bit |
| TOD102CS |
102 |
4 |
2.95 |
4.5 |
| TOD114CS | 114 |
4.5 |
3.46 |
5 |
| TOD133CS |
133 |
5.25 |
4.25 |
5.75 |
| TOD152CS | 152 |
6 |
5 |
6.5 |
D. Ring Bit
Our overburden drilling bits come in either button or ballastic style carbide.
| Size Chart for Ring Bits |
|||||
| Thomas Part # |
Size |
Diameter |
Hole
Sizes |
ID |
OD
Bit |
| TOD102RB422 |
102 |
4 |
4.22" |
2.95 |
4.5 |
| TOD102RB450 | 102 | 4 |
4.50" |
2.95 |
4.5 |
| TOD102RB475 | 102 | 4 |
4.75" |
2.95 |
4.5 |
| TOD102RB500 | 102 | 4 |
5.00" |
2.95 |
4.5 |
| TOD114RB475 | 114 | 4.5 |
4.75" |
3.46 |
5 |
| TOD114RB500 | 114 | 4.5 |
5.00" |
3.46 |
5 |
| TOD114RB525 | 114 | 4.5 |
5.25" |
3.46 |
5 |
| TOD133RB550 | 133 |
5.25 |
5.50" |
4.25 |
5.75 |
| TOD133RB600 | 133 |
5.25 |
6.00" |
4.25 |
5.75 |
| TOD152RB600 | 152 |
6 |
6.00" |
5 |
6.5 |
| TOD152RB625 | 152 |
6 |
6.25" |
5 |
6.5 |
