Specifications

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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 have 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 more carbide for cutting. The quantity of steps is largely determined by the size of bit.

Stepped drag bit is a drill bit uses in soft formations such as sand, clay, or some soft rock.

We can supply different diameter of 2-wings drag bit, 3-wings drag bit, 4-wings drag bit, 5-wings drag bit, 6-wings drag bit etc.

Drag bit are manufactured from forged high quality alloy steel and premium tungsten carbide insert, plus state of art welding technology and multiple precision heat treatment to provide highest penetration rate and longest lifespan at roughest condition.

Product description:

SRF Drag bits also named blade bits, with a TC inserts on the blades.

They are usually designed for use in soft formations such as sand, clay, or some soft rock.

Their uses include drilling water wells, mining, geothermal, environmental and exploration drilling.

Whenever possible, they should be used to drill pilot holes, for they produce cuttings that are easiest to log.

Usually drag bits are three wings, while sometime people need four wings or five wings.

Other special design is available upon your request.

Three wings drag bits:

1. Drag bits are made according to API standard or NROD thread standard or others.
2. Various step and chevron drag bits are available from 2 inch to 17 1/2 inch.
3. There is very good feedback because of the quality and price.
4. Different drag bits can be made according to your drawings or samples.

For more detailed specifications or catalog please feel free to contact with us.

Step Type Drag Bits (3-way)
Size	Type Pin	Wt. (lbs.)
2 3/4" - 3 1/2"	4 THD N - Rod	3 1/2
2 5/8" - 4 3/4"	2 3/8" API	5 1/2
4 7/8" - 5 1/8"	2 3/8" API	7
5 1/4" - 5 1/2"	2 3/8" API	8
5 5/8" - 6"	2 3/8" API	8
6 1/8" - 6 1/4"	2 3/8" API	8 1/2
6 1/2"- 6 3/4"	2 3/8" API	9
5 1/2" - 6 3/4"	3 1/2" API	22
6 7/8" - 7 7/8"	3 1/2" API	23
8" - 9"	3 1/2" API	24
9 1/8" - 10 7/8"	3 1/2" API	25-30
7 7/8" - 8 7/8"	4 1/2" API	40
9" - 9 7/8"	4 1/2" API	42
10" - 10 7/8"	3 1/2" API or 4 1/2" API	45
11" - 12 1/4"	3 1/2" API or 4 1/2" API	50