Step-type drag bits come in a variety of wing counts, steps, and sizes to accommodate drilling in a variety of formations, from sand and clay to shale, limestone, gravel, and more.
Three-Wing and Four-Wing - Three-wing bits tend to drill faster, whereas four-wing bits are longer lasting, more durable, and drill a straighter hole.
Regular Step and Heavy Step - Regular Step bits develop smaller cuttings, whereas Heavy Step bits are more durable and are used in harder formations. Heavy Step bits have longer and wider steps and contain larger carbide for cutting. The quantity of steps is largely determined by the size of bit.
Bits |
Stock Sizes
|
Available Stock Threads
|
Three-Wing and Four-Wing Regular Step |
3 7/8" - 26"
|
2 3/8", 2 7/8", 3 1/2", 4 1/2", 6 5/8" API regular pin |
Three-Wing and Four-Wing Heavy Step |
5 1/2" - 26"
|
2 3/8", 2 7/8", 3 1/2", 4 1/2", 6 5/8" API regular pin |
Three-Wing and Four-Wing Regular Step Kelly Bit |
5" - 26"
|
MHJR, MHR, FEDP, IF |
Three-Wing and Four-Wing Heavy Step Kelly Bit |
5 1/2" - 26"
|
MHJR, MHR, FEDP, IF |
Chevron-type drag bits are recommended for drilling in slightly harder and more consolidated materials than step-type drag bits, such as hard shales, limestones, and unconsolidated gravels.
Bits |
Stock Sizes
|
Available Stock Threads
|
Three-Wing and Four-Wing Chevron |
3 7/8" - 26"
|
2 3/8", 2 7/8", 3 1/2", 4 1/2", 6 5/8" API regular pin |
Three-Wing and Four-Wing Chevron Kelly Bit |
3 7/8" - 26"
|
MHJR, MHR, FEDP, IF |