High Quality concentric Casing System drill Bits DHD350 5"
High Quality concentric Casing System Bits DHD350 5"
High Quality concentric Casing System Bits DHD350 5"
Concetric drill bit's Description :
SINODRILLS Symmetric overburden casing drilling systems
Symmetric is a system comprised of an ingeniously simple concentric method of drilling through overburden with casing. Symmetric can drill straight holes at any angle (including horizontal) and to depths beyond 100 meters. Working together as one efficient drill bit, the components are made up of:
A pilot bit with large internal flushing holes and external flushing grooves.
Symmetrical ring bit (reamer) with internal bayonet coupling
Casing shoe for driving of casing.
The pilot bit is attached to any common DTH hammer shank or top hammer rod thread.
The casing shoe is welded to the casing. The pilot bit and ring bit are locked together by the bayonet coupling. They drill a hole large enough to allow the casing to be pulled into the hole. The pilot bit and ring bit rotate with the drill string while the casing shoe and casing do not rotate. When required depth is reached, the pilot bit is unlocked by a slight reverse rotation of the drill string. The drill string and pilot bit will be retrieved through the casing, the ring bits and casing shoe will be left in the hole for permanent casing system. Also the ring bits and casing can be retrievable through the special design for ring bits and casing shoe. We can manufacture both permanent Symmetric and Retrievable Symmetric system which can meet your comprehensive requirement.
Assembly | Casing tube | Ring bit | Central bit | Hammer | Drill pipe dia.(mm) | |||
Outside dia.(mm) | Wall thickness(mm) | D1(mm) | D2(mm) | D3(mm) | D4(mm) | |||
SDS75-3.5-108/7.5 | 108 | 7.5 | 118 | 77 | 91 | 75 | DHD3.5 | 76 |
SDS 80-3.5-114/6 | 114 | 6 | 127 | 88 | 100 | 80 | DHD3.5 | 76 |
SDS 90-3.5-127/6.5 | 127 | 6.5 | 138 | 92 | 112 | 90 | DHD3.5 | 76 |
SDS103-340-140/6 | 140 | 6 | 152 | 105 | 126 | 103 | DHD340A | 76 |
SDS106-340-146/7.5 | 146 | 7.5 | 158 | 108 | 129 | 106 | DHD340A | 76 |
SDS121-350-168/10.5 | 168 | 10.5 | 189 | 123.5 | 145.5 | 121 | DHD350R | 76/89 |
SDS130-350-168/8 | 168 | 8 | 189 | 132 | 149 | 130 | DHD350R | 76/89 |
SDS 136-350-178/9 | 178 | 9 | 192 | 138 | 158 | 136 | DHD350R | 76/89 |
SDS139-350-183/10 | 183 | 10 | 195 | 141 | 161 | 139 | DHD350R | 76/89 |
SDS148-360-194/6.5 | 194 | 6.5 | 211 | 150 | 179 | 148 | DHD360 | 114 |
SDS163-360-219/7 | 219 | 7 | 232 | 165 | 203 | 163 | DHD360 | 114 |
SDS163-360-219/12.5 | 219 | 12.5 | 232 | 165 | 191 | 163 | DHD360 | 114 |
SDS218-380-273/11.5 | 273 | 11.5 | 308 | 220 | 247 | 218 | DHD380 | 114/140 |
SDS218-380-273/6.5 | 273 | 6.5 | 308 | 220 | 257 | 218 | DHD380 | 114/140 |
SD 253-110-324/9.5 | 324 | 9.5 | 348 | 255 | 303 | 253 | DHD110 | 140/194 |
SDS338-112-406/9.5 | 406 | 9.5 | 440 | 340 | 382 | 338 | DHD112 | 194/273 |
Packing : ODEX bit will pack in cardboard and plywood case.
- Shipping : ODEX bit will ship by sea , by air , by Express , etc .
High Quality concentric Casing System Bits DHD350 5"
1. OEM & ODM , as your request .
2. Best quality control : we have our own experienced QC team and the third party test .
3.Quick response .
4.Quick delivery .
5.Best after sevice .
DHD350 Mission50 QL50 SD5 concentric drill bit
DHD350 Mission50 QL50 SD5 concentric drill bit
Q1: Are you a manufacturer?
Yes, we own 3 plants to manufacture various drilling products, including self-drilling anchoring tools, DTH drilling tools and TH (top hammer) drilling tools. Meanwhile, for some items we do not produce in our own plants, we are authorized distributors by some brands, like G brand of TH (top hammer) drill rods. So we are a one-stop supplier of full range of rock drilling products.
Q2: Are your products high qualty ?
Yes . our customers made the test reports proved that .
Such as : 1) Drill bits , similiar quality as Atlas .
2) DTH hammer , 15% higher penetration speed than conventional DTH hammer in the market .
Q3: What qualifications do you have?
A2: Till 2016, we have following qualifications:
1) ISO 9001:2008 management system;
2) 3AA2 credit rating by Dun & Bradstreet;
3) Honoring Contract and Keeping Promise Enterprise by AIC.
4) EC examination certificate for self-drilling anchor bars.
5) 2 invention patents & 6 utility patents.
Q4: Where did you export ?
A3: Till 2018 we have exported to 95 countries.
Q5: What kind of payment terms do you offer and what is your best payment terms?
A4: We offer different payment terms, including T/T, D/A, D/P, L/C and O/A, etc. Our best payment terms is 120 days after shipping date for our distributors and sole distributors.
Q6:Do you offer warranty on your products?
A5: Yes, for different products we offer different warranty that cover all manufacturing defects in materials and workmanship. The longest period of warranty is 2 years after shipping date.
Q7: Do you offer OEM service?
Q6: Yes, we can offer OEM service if you have regular requirement.
- Step 1Find your interested products by search keywords
- Step 2Contact the supplier by clicking ”Enquire” or “request meeting” button, otherwise, you also could consult our import consultant.
- Step 3After verifying your email, get response from suppliers or our trade manager will contact you as soon as possible
- Step 4Set up meeting with the Chinese supplier without language barrier