Water Well Drilling Drag Bits 5 7 8.5 9 10 11 12 13 Inch Step Bit
Step Drag Bit
In geological drilling and water well construction, "dragging" is commonly used to describe a cutting method of PDC (Polycrystalline Diamond Composite) drill bits, which involves "scraping" or "shearing" rocks, rather than traditional impact crushing.
Technical features:
Cutting mechanism: relying on the PDC teeth on the drill bit body, embedded in the formation under the action of drilling pressure, and generating shear force through rotation to break the rock. This method of action is similar to "drag" cutting, and is therefore sometimes referred to as drag or scraper drill bits.
Structural form: commonly with 3 or more wing structures, optimized flow channel design to facilitate rock debris carrying and drill bit cooling.
Application scenarios: Widely used for rapid drilling in soft to medium hard formations, such as shallow water wells, geothermal wells, and some oil and gas drilling. Its advantages are high mechanical drilling speed, long service life, and smooth operation.
| Size |
Type Pin |
Wt. (lbs.) |
| 3 7/8" - 4 3/4" |
2 3/8" REG Pin |
6 |
| 4 7/8" - 5 1/8" |
2 3/8" REG Pin |
7 |
| 5 1/4" - 5 1/2" |
2 3/8" REG Pin |
8 |
| 4 5/8" - 5" |
2 7/8" REG Pin |
10 |
| 5 1/8" - 5 1/2" |
2 7/8" REG Pin |
11 |
| 5 5/8" - 6 1/4" |
3 1/2" REG Pin |
18 |
| 6 1/2" - 6 3/4" |
3 1/2"REG Pin |
19 |
| 7" - 7 1/2" |
3 1/2" REG Pin |
21 |
| 7 5/8" - 8"-12 1/4 |
3 1/2" REG Pin 4 1/2 6 5/8 |
23 |
3 wings step drag bits
3 wings step drag bits are one piece construction of alloy steel cast with tungsten carbide cutting tips and gauge sides to ensure longer life. It has 3 wings and 3 flushing holes. Compared with 4 wings, 3 wings step drag bits tend to drill faster and aggressive, whereas, are shorter lasting and less durable.3 wings step style drag bits will produce larger cuttings force than chevron style drag bit. Rotary table speed ofstep drag bits should be between 60 and 80 rpm with light weight on bit (WOB).
3 wings step drag bits are economical tools when drilling softer geological formations and shallower depths, they are primarilydesigned for soft tomedium formations, such as Clay, Loam, Silt ,Mostsoft-to-medium soilsthat have some moisture, etc. And also step drag bits are recommended for drilling in Mining, Exploration, Environmental, Water well, Geo Exchange, etc.
| 3 wings step drag bits |
| Diameter |
Thread |
| 2 to 17 1/2 inch |
50.8 to 444.5mm |
Optional |
Note: The diameter and thread showed as above are usual size, other sizes are available upon request.
Thread size: 2 3/8'' Reg, 2 7/8'' Reg, 3 1/2'' Reg, 4 1/2'' Reg, 6 5/8'' Reg, 2'' API IF, 2 3/8'' IF, 2 7/8'' IF, A Rod, N Rod, AW, BW, NW, AWJ, BWJ, NWJ.
Sinodrills drag bits features:
1, A solid one piece heat treated, 4140 alloy steel body for bit strength & durability;
2, CNC threaded machining for proper installation &use;
3, Forgings are milled to better seat the carbide inserts.
4, Select tungsten carbide inserts 5.5mm thick are standard.
5, Relief is hand ground behind carbide inserts for maximum performance.
Company Profile
Crossing Bit, a leading manufacturer of PDC bits and tricone bits in northern China, has exported its high-quality drill bits to more than 30 countries, demonstrating its strong market influence and exceptional product strength.
Crossing Drilling Tools has not only established a sterling reputation in the drilling, construction, HDD (horizontal directional drilling), exploration, water well, geothermal, mining, and oil & gas industries, but has also gained widespread recognition from customers for its exceptional product reliability and quality. We are committed to developing and producing a range of high-quality tools, including tricone bits, PDC bits, tricone cutters (single rollers), PDC reamers, drag bits, and HDD hole openers, to meet the diverse needs of our customers.
Our meticulously designed PDC bits are specifically optimized for directional drilling. With exceptional stability, durability, and "directional" friendliness, they are able to precisely maintain the bit's position in narrow and complex pay zones, ensuring smooth drilling operations.
This unique steerable bit technology, combined with high ROP (rate of penetration), sets Crossing Bit apart from the competition and establishes it as a leader in the industry.
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