The Prodrill symmetric drilling system is designed to drill and case a hole simultaneously through unstabled ground conditions. The driver bit incorporated with a satisficial ring or reusable ring makes a full face head design which significantly improves the penetration rate and hole straightness of drilling. The internal flushing grooves together with the built-in casing shoes gives a good seal to the button of the drilling hole, and thus minimising the disruption of the surronding of the drill hole.
Application Range: It is suitable for drilling water wells , geothermal wells , short mircopiles ,medium mini-type grouting hole of building , dam and harbour project .
1. Ring bit and casing shoe assembly is welded to casing prior to drilling. Lock the assembly into pilot bit with hammer. The pilot bit's upper shoulder engages the shoulder of the casing shoe.
2. Hammer's percussive energy is transferred through the pilot and ring bits, crushing rock . Part of impact energy advances casing.
3. On completion of drilling and casing , the drill string with pilot bit is retrieved by a slight reverse rotation to unlock the bayonet coupling . The ring bit stays in the hole , and can be recovered only if the casing is retrieved
4. Drilling continues to the desired depth in the bedrock using a conventional drilling.
Advantages:
Full face head desigh for faster penetration and straighter hole
Less torque is required
Can drilll in vertical, horizotal or any direction
Minimize disruption to the drilled hole
Other Models
RoBit Size Permanent/Top hammer
Symmetrix overburden drilling system |
| Code No. |
Casing O.D. |
Wall thickness |
Ring bit I.D. |
Ring bit O.D. |
Polit bit O.D. |
Thread |
|
| mm |
inch |
mm |
inch |
mm |
inch |
mm |
inch |
mm |
inch |
| RoBit-SOD 89 |
89 |
3 1/2'' |
4 |
0.157 |
71 |
2.795 |
99 |
3.898 |
80 |
3.15 |
T38 |
| RoBit-SOD 76 |
76 |
3'' |
8 |
0.315 |
47 |
1.85 |
90 |
3.543 |
59 |
2.323 |
T38 |
| RoBit-SOD 89 |
89 |
3 1/2'' |
8 |
0.315 |
50.8 |
2 |
94.9 |
3.736 |
70 |
2.756 |
T38 |
| RoBit-SOD 101 |
101.6 |
4'' |
10 |
0.394 |
65 |
2.559 |
110 |
4.331 |
79 |
3.11 |
T38 |
| RoBit-SOD 114 |
114 |
4 1/2'' |
10 |
0.394 |
73.5 |
2.894 |
120.3 |
4.736 |
92.5 |
3.642 |
T38 |
| RoBit-SOD 140 |
140 |
5 1/2'' |
10 |
0.394 |
94 |
3.701 |
145.7 |
5.736 |
117.5 |
4.626 |
T45 |
| RoBit-SOD 168 |
168 |
6 5/8'' |
10 |
0.394 |
127 |
5 |
182.3 |
7.177 |
147 |
5.787 |
T45 |
SOD Permanent/Top hammer
Symmetrix overburden drilling system |
|
| Order number |
Casing wall
max. thickness |
Ring bit |
Pilot bit |
Unit |
|
| Inner |
Outer |
Outer |
| ATLAS-SOD 76 |
8 |
41 |
88 |
58 |
mm |
| 0.31 |
1.61 |
3.46 |
2.26 |
inch |
| ATLAS-SOD 89 |
8 |
54 |
100 |
70 |
mm |
| 0.31 |
2.13 |
3.94 |
2.76 |
inch |
*** Other Structures:
Concentric (or Symmetric or Symmetrix) Overburden Casing System: With ring bits, with wings and with slide blocks.
others, Concentric (or Symmetrix) Overburden Casing System with Blocks
Model:
1) Casing Shoe + pilot bit + 2 pcs Blocks; Or
2) Casing Shoe + pilot bit + 3 pcs Blocks; Or
3) Casing Shoe + pilot bit + 4 pcs Blocks.
__________________________________________________________________
Concentric (or Symmetric or Symmetrix) Overburden Casing System With Wings
Symmetric or Symmetrix Overburden Casing Drilling System With Wings
Symmetrix Overburden Casing Drilling System With Two Wings
__________________________________________________________________
Ps.: Others
1. Besides, we also sell other drilling, blasting tools:
Construction & Mining & Rock Drill Tools:
A. Down the hole (DTH) Bits and Hammers (drill hole dia.: 76 ~ 381mm): similar to DHD, MISSION series;
B. Top Hammer (drill hole dia.: 33 ~ 152mm): Threaded Tools (Button Bits, Rod, Coupling, Shank Adaptor): (item: R25 / R28/ R32 / R38 and T38 / T45 / T51, ST58, etc.);
C. Overburden Casing Drilling System
2. Advantages:
Compared with the oversea brands, our advantages are bellowing:
a. Our products can match over 95% against the original products
b. Price are competitive against the famous brands and best quality against the small factory
3. About Us:
1. Our factory has been specialized in manufacturing drilling tools and spare parts for over 20 years.
2. We have advanced technology and equipment.
3. Our technician has more than 20 year's professional working experience.
4. Rock drilling tools are exported throughout the world. Main market: Norway, Turkey, USA, Canada, Australia, Brazil, Uruguay, Iran, Philippines, Thailand, India, etc.
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