Applications:
Blast holes
Water supply wells
Bridge and building foundations
Standard slant or horizontal drilling
Mining air holes
Environmental monitoring wells
Grouting operations
Seismic shot holes
Soil sample and geo-technical applications
Ground anomaly and tiebacks
Storage caverns and dam
Features:
Casing drilling involves drilling and casing a well simultaneously through unstable ground conditions, In casing drilling process, down the hole tools can be retrieved, through the casing on wire-line, meaning tool recovery or replacement of tools can take minutes versus hours under conventional methods. This process employs wire line-retrievable tools and a drill-lock assembly, permitting bit and BHA changes, coring, electrical logging and even directional or horizontal drilling. Once the casing point is reached, the casing is cemented in place without tripping pipe.
Casing drilling has been employed in many countries as an effective method of reducing the overall drilling costs by reducing drilling time and drill string problems encountered during conventional drilling process.
Technical parameter:
|
Symmetric Assembly Codes |
Casing Outside Diam (mm) |
Casing Wall Thickness (mm) |
Ring Bit (mm) |
Type |
Hammer Type |
|
TGZ118-3.5-108/7.5 |
108 |
7.5 |
118 |
3" |
DHD3.5 |
|
TGZ123-3.5-115/6.5 |
114 |
6.5 |
123 |
3" |
DHD3.5 |
|
TGZ134-3.5-127/6.5 |
127 |
6.5 |
134 |
3" |
DHD3.5 |
|
TGZ152-44-140/6.5 |
140 |
6.5 |
152 |
4" |
DHD340A |
|
TGZ156-44-146/8.5 |
146 |
8.5 |
156 |
4" |
DHD340A |
|
TGZ189-54-168/6.5 |
168 |
6.5 |
189 |
5" |
DHD350R |
|
TGZ192-54-178/9 |
178 |
9 |
192 |
5" |
DHD350R |
|
TGZ192-54-183/10 |
183 |
10 |
192 |
5" |
DHD350R |
|
TGZ211-64-195/6.5 |
195 |
6.5 |
211 |
6" |
DHD360 |
|
TGZ232-64-219/12.5 |
219 |
12.5 |
232 |
6" |
DHD360 |
|
TGZ236-64-219/7 |
219 |
7 |
236 |
6" |
DHD360 |
|
TGZ273-84-243/7 |
243 |
7 |
273 |
8" |
DHD380 |
|
TGZ286-84-273/11.5 |
273 |
11.5 |
286 |
8" |
DHD380 |
|
TGZ308-84-273/6.5 |
273 |
6.5 |
308 |
8" |
DHD380 |