Drag Bits
Drag bits have a wide range of drilling applications including environmental, exploration, geothermal, water well, road construction, and natural gas and oilfield drilling. The best application for these types of drill bits is softer, unconsolidated formations like clays, shale, sands, and soft limestone. The most common styles are either step type or chevron type bits.
Step Drag Bits
Drill overburdens with sands, clays and soft formations with a step drag bit.
The more aggressive cutting structure will produce larger cuttings than a
chevron style bit and with higher ROP. However, it is less durable as well.
For best drilling results, maintain rotary table speeds between 60 and 80 rpm
with light weight on bit (WOB).
The more aggressive cutting structure will produce larger cuttings than a
chevron style bit and with higher ROP. However, it is less durable as well.
For best drilling results, maintain rotary table speeds between 60 and 80 rpm
with light weight on bit (WOB).
Chevron Drag Bit
Drill more abrasive formations, like soft sandstones and shales, with a chevron type bit. The cutting structure is more durable than the step style bit but will also penetrate more slowly. For best drilling results, maintain rotary table speeds between 50 and 60 rpm with light to medium weight on bit (WOB). Harder formations require more WOB. For chevron style drag bits, both Blue Streak and Kay Rock Bit offer premium bits for water well and oilfield drilling.
