Drag Bits

Drag Bit is a common tool which used to rework operation, fordrilling cement plug and sinker drilling sand bridge, salt bridge,scraping off the dirt of casing wall and hard wax and some mineralcrystallization. Still can scraping well hole, making the wallbright and clean, it may used to drilling ahead in bushing and sidetrack (Can destroy the keyway is formed when side track) ordrilling and rubbing the mat of perforating shell, etc.

Under drilling and pressure effect, drilled goods as thecement is sucked at the bottom, through the rotation, the part ofsucked is cutting in the direction of circumference, it will bedrilling down gradually. Side lobe will be milled by drillinggoods, forming cylinder space so that better dressing the well boreby drilling.