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Overburden Drilling Pipes & Acc.

overburden drilling
Overburden Drilling Pipe and Accessories

    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:
overburden drilling collage
  • 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
How It Works

    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    Casing tubes can be left in position to stabilize the hole or withdrawn after the installation of cables, plastic tubes, or other equipment.

The OD Drilling System is available in  the following sizes:
  • 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



Product Image Item Name- Price
Overburden Drilling Adapter Head

Overburden Drilling Adapter Head

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...


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Overburden Drilling Coupling

Overburden Drilling Coupling

  Couplings for overburden drilling systems come in sizes 102, 114, 133, or 152 mm. Size Chart for Couplings Thomas Part # Diameter TOD102CS 102...


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Overburden Drilling Pipe

Overburden Drilling Pipe

  Pipe for overburden drilling systems come in 3, 6, and 9 foot lengths. Size Chart for Pipe Thomas Part # Diameter LengthTOD102ET3 102 3"...


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Overburden Drilling Ring Bit

Overburden Drilling Ring Bit

Refer to Size Chart Below: Size Chart for Ring Bits Thomas Part # Diameter Hole Sizes TOD102RB422 102 4.22" TOD102RB4501024.50"...


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