Description
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
Specification
Symmetrix Overburden Drilling System Specification |
Code No. |
Casing
O.D. |
Casing
Wall Max |
Ring Bit
I.D. |
Ring Bit
O.D. |
Pilot Bit
O.D. |
Hammer Tpye |
Drill Pipes |
|
mm |
mm |
mm |
mm |
mm |
inch |
mm |
SOD 108 |
108 |
9 |
77 |
118 |
86 |
|
76 |
SOD 114 |
114 |
11 |
82 |
127 |
91 |
3.5″ |
76 |
SOD 127 |
127 |
11 |
92 |
136 |
101 |
|
76 |
SOD 140 |
140 |
13 |
105 |
152 |
117 |
4″ |
76 |
SOD 146 |
146 |
14 |
105 |
154 |
117 |
|
76 |
SOD 168 |
168 |
13 |
125 |
184 |
140 |
5″ |
76,89 |
SOD 178 |
178 |
13 |
140 |
194 |
150 |
5″ |
76,89 |
SOD 193 |
193 |
13 |
150 |
206 |
164 |
|
89,114 |
SOD 219 |
219 |
13 |
165 |
234 |
184 |
6″ |
89,114 |
SOD 244 |
244 |
13 |
190 |
260 |
210 |
6″ |
114 |
SOD 273 |
273 |
14 |
220 |
305 |
240 |
8″ |
114,127 |
SOD 323 |
323 |
13 |
255 |
348 |
284 |
8″ |
127 |
SOD 406 |
406 |
18 |
340 |
440 |
364 |
10-12″ |
140 |
SOD 457 |
457 |
18 |
385 |
488 |
413 |
|
140 |
SOD 508 |
508 |
18 |
440 |
538 |
464 |
12-15″ |
140 |
SOD 558 |
558 |
18 |
485 |
590 |
514 |
|
140 |
SOD 610 |
610 |
18 |
540 |
642 |
566 |
18″ |
168 |
SOD 660 |
660 |
18 |
590 |
694 |
615 |
|
168 |
SOD 711 |
711 |
18 |
640 |
745 |
665 |
|
168 |
SOD 762 |
762 |
18 |
685 |
798 |
716 |
|
168 |
SOD 863 |
863 |
18 |
785 |
900 |
815 |
|
168 |
About Us:
1. Our factory has been specialized in manufacturing drilling tools and spare parts for over 10 years.
2. We have advanced technology and equipment.
3. Our technician has more than 13 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.