| Customization: | Available |
|---|---|
| Customized: | Customized |
| Length: | Jobber-length |
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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
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