Description
The below size of Symmetric systems which are available, and the special design is upon customer’s requirement:
Symmetric 114, Symmetric 127, Symmetric 140, Symmetric 146, Symmetric 168,
Symmetric 178, Symmetric 195, Symmetric 219, Symmetric 243, Symmetric 273.
Application Range: It is suitable for drilling water wells , geothermal wells , short miscopies ,medium mini-type grouting hole of building , dam and harbor 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.
Specifications
| Product model |
Casing OD(mm) |
Casing wall max (mm) |
Ring bit OD(mm) |
Ring bit OD
(mm)
|
Pilot bte OD(mm) |
hammer |
| NSOD114 |
114.3 |
6/10 |
91/78 |
128/124 |
100/92.5 |
ND35 |
| NSOD127 |
126.7 |
7 |
99 |
140 |
110 |
ND35 |
| NSOD140 |
139.7 |
7/10 |
116/94 |
154/150 |
124/117.5 |
ND45/NQL4 |
| NSOD168 |
168.3 |
8/12.7 |
142/121 |
182/178 |
150/140 |
ND55/NQL5 |
| NSOD178 |
178.3 |
10 |
145 |
195 |
156 |
ND55/NQL5 |
| NSOD194 |
193.7 |
6/12.7 |
167/148 |
212/203 |
180/167 |
ND65/NQL6 |
| NSOD219 |
219.1 |
7/12.7 |
186/167 |
234 |
203/191 |
ND65/NQL6 |
| NSOD273 |
273.0 |
8/12.7 |
232/219 |
292 |
255/246 |
ND85/NQL8 |
| NSOD325 |
323.9 |
8/12.7 |
281/270 |
342/342 |
306/297 |
ND85/NQL8 |
| NSOD406 |
406.4 |
12.7 |
328 |
419 |
374 |
NSD10/N125 |
| NSOD508 |
508.0 |
15 |
412 |
526 |
470 |
ND475/SD15 |
| NSOD609 |
609.6 |
15 |
513 |
637 |
570 |
ND525/SD18 |
Feature Advantage
1. price commitment: in order to ensure the high reliability of products, high-quality brand products are selected for raw material selection. Under the same competitive conditions, no more products will be provided to customers at a favorable price, based on the reduction of the technical performance of products.
2. Quality commitment: product manufacturing and testing have quality records and inspection data; the performance of the product can withstand customer inspection.
3. Customer service: in order to create new diamond brand, enhance the visibility of enterprises,establish corporate image, we serve customers with the principle of "preferential prices, good service, reliable product quality"principle.
Product Tags:
|
|
Foundation Construction Casing Advancement Systems For Harbor Project NSOD Series Images
|
