Casing method
关键词：
Unicorn Drill Combined kelly bar <br> Size:base on the rigs (Customize)”<br> Section:1-6sections (Customize the type of kelly bar according to requirements)<br> Lead time :5-10 working days<br> Warranty::one year or 2000 working hours
Double-walled casings can be used universally, as they are designed especially for transmitting high rotational and vertical forces as created by the rotary drives and oscillators.
The use of double-walled casings ensures a flush drill string.
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