Drill Bit for Rotary Drilling Rig

Screw Drill Bit: Loose soil layer

Barrel Drill Bit: Quicksand, thin mud

Coring Drill Bit: Hard stratum, weathered rock, cement ground, shale

Taphole Drill Bit: Clay

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overview

Classification

According to the difference of application formations, the drilling bits of rotary drilling rig can be classified into screw drill bit, barrel drill bit, coring drill bit, and taphole drill bit.

	Applicable formation	Features
Screw drill bit	Loose soil layer	* Large diameter drilling * Straight spiral design, convenient to carry the slag. * Double-headed spiral with uniform force, not easy to deviate. * The double spiral has strong slag carrying capacity, and the single spiral is easy to unload slag.
Barrel drill bit	Quicksand, thin mud	* Built-in anti-suction drill hole * Integral central cone, curved guide plate cloth teeth, double drill bottom mechanism design for large drill
Coring drill bit	Hard stratum, weathered rock, cement ground, shale	* High drilling capacity * Roller coring drill bit is required for slightly weathered granite, and picket coring drill bit is used for severe weathering rock formations, which can reduce the cost of roller bullets.
Taphole drill bit	Clay	Belongs to a type of barrel drilling bit.

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