Place of Origin: | China |
Brand Name: | MIROC down the hole hammer drill tool |
Model Number: | DTH Button Bit |
Minimum Order Quantity: | 1 Pieces DTH Button Drill Bit |
---|---|
Price: | Negotiation |
Packaging Details: | Carton Box or Wooden Box |
Delivery Time: | 25 days |
Supply Ability: | 20000 pieces per month |
Certification: | ISO9001,API | Product Name: | Factory Hot Selling DTH Drill Bits |
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Application: | Water Well Drilling, Quarry Drilling, Construction Rock Drilling | Hammer Type: | DHD360 |
Casing Diameter: | 114.3-609.6mm | Name: | DTH Button Bit |
Processing Type: | Forging | Material: | Tungsten Carbide & Steel |
Face: | Flat / Convex / Concave | Machine Type: | Drilling Equipment |
High Light: | 114mm dth hammer bit,Tungsten Carbide dth hammer bit,rock dth hammer bit |
Tungsten Carbide Rock 114mm Retrievable Symmetric Casing System DTH Hammer Bit
Product Description
The Symmetric/Concentric drilling system is designed to drill and case a hole simultaneously through unstable 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 minimizing the disruption of the surrounding of the drill hole.
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
Specification
Outer Dia. of |
Inner Dia. of |
Reamed Dia. |
Min. Inner Dia. of |
Drill Pipes |
Max. Outer Dia. of |
mm |
Mm |
mm |
mm |
mm |
mm |
108 |
93-99 |
118 |
86 |
76 |
77 |
114 |
101-103 |
127 |
91 |
76 |
82 |
127 |
114-116 |
136 |
101 |
76 |
92 |
140 |
124-127 |
152 |
117 |
76 |
105 |
146 |
127-132 |
154 |
117 |
76 |
105 |
168 |
149-155 |
184 |
140 |
76,89 |
125 |
178 |
159-165 |
194 |
150 |
76,89 |
140 |
193 |
173-180 |
206 |
164 |
89,114 |
150 |
219 |
199-206 |
234 |
184 |
89,114 |
165 |
244 |
224-231 |
260 |
210 |
114 |
190 |
273 |
251-257 |
305 |
240 |
114,127 |
220 |
323 |
301-310 |
348 |
284 |
127 |
255 |
406 |
382-388 |
440 |
364 |
140 |
340 |
457 |
433-439 |
488 |
413 |
140 |
385 |
508 |
484-490 |
538 |
464 |
140 |
440 |
Our Factory
Contact Person: Mr. Yingkai Zhang
Tel: +86 18501231988