Drill Collar Specification Drill collars are used at the bottom of the drill string, just above the drill bit. They are used mainly for weight on the drill bit but also work as a shock absorber to dampen the vibrations and impact forces caused by drilling. There are two main...
Varco “DC” Style 3" through 14" The wraparound design assures firm grip and the flat segment tops make it easy to lay safety clamps Woolley “Type A” 3" through 10" The three piece insert design insures complete gripping action, but allows...
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