| Customization: | Available |
|---|---|
| Customized: | Customized |
| Length: | Jobber-length |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
| Payment Methods: |
|
|---|---|
| Support payments in USD |
| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
1.Hardening treatment of the parts surface with longer operating life and excellent anti-wear properties
Double Casing Technical Date |
||||||
| A | B | C | D | E | F | G |
| Outer Dia.(mm) | Reamed Dia.(mm) | Inner Dia.(mm) | Thread(mm) | Drill rod(mm) | Drill Bit Dia.(mm) | Thread |
| 118 | 125 | 88 | 104.5 | 76 | 83 | R56 |
| 133 | 140 | 108 | 122 | 76 | 102 | R56 |
| 146 | 152 | 120 | 134 | 89 | 116 | R78 |
| 168 | 172 | 133 | 146.5 | 114 | 128 | R83 |
| 216 | 225 | 178 | 203 | 114 | 165 | R102 |
Two Independent Rotary Heads
Separately drives the outer casing and the inner drill string and are typically mounted on separate sleds which can be adjusted independently to control the position of the inner string in relation to the casing bit.
Casing bits for dual rotary systems are ring bits with tungsten carbide inserts.
The carbide insert is typically a scraping type.
Male/female friction welded double-start rotary percussive casing
){kind=link}