8"~16" Step Drag Bits API Connection
Specialisted in producing varies kinds of tungsten carbide (TC) drag bits in China for many years. Including of carbide drag bit, carbide steped drag bit, 3-wings, 4-wings, etc.
With ISO certificate & quality control.
Stepped drag bit is a drill bit uses in soft formations such as sand, clay, or some soft rock.
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 stepped drag bits:
Drag bits are made according to API standard or NROD thread standard or others.
Various step and chevron drag bits are available from 2 inch to 17 1/2 inch.
There is very good feedback because of the quality and price.
Different drag bits can be made according to your drawings or samples.
4.1/2", 4.3/4", 5.1/8", 5.5/8", 5.7/8", 6.1/4", 6.3/4", 6.5/8" 7.3/8" 9.7/8", 11.1/2" etc. Drag bits are available.
We can manufacture all kinds of bits and shells according to customer's special requirement.
| Size |
Type Pin |
Wt. (lbs. ) |
| 1 3/4" - 2 1/2" |
AW, A-Rod |
2 |
| 2 5/8" - 2 7/8" |
AW, A-Rod |
2 1/2 |
| 2 3/4" - 3 1/4" |
3THD/4THD N-Rod, 2" IF |
4 |
| 3 3/8" - 3 3/4" |
3THD/4THD N-Rod, 2"IF |
4 1/2 |
| 3 7/8" - 4 3/4" |
2 3/8" API Pin |
6 |
| 4 7/8" - 5 1/8" |
2 3/8" API Pin |
7 |
| 5 1/4" - 5 1/2" |
2 3/8" API Pin |
8 |
| 4 5/8" - 5" |
2 7/8" API Pin |
10 |
| 5 1/8" - 5 1/2" |
2 7/8" API Pin |
11 |
| 5 5/8" - 6 1/4" |
3 1/2" API Pin |
18 |
| 6 1/2" - 6 3/4" |
3 1/2" API Pin |
19 |
| 7" - 7 1/2" |
3 1/2" API Pin |
21 |
| 7 5/8" - 8" |
3 1/2" API Pin |
23 |
We can manufacture all kinds of bits and shells according to customer's special requirement.
Any requirement please contact us, we'll do the best service for you. Hope we can establish a good business relationship.
FAQ
Q: Are you a manufacturer or trading company ?
A: We are a specialized manufacturer.
Q: How about the delivery terms ?
1. Payment: T/T, L/C, Western Union, Paypal, 30% deposit in advance and rest before delivery.
2. Min. order quantity: 1 piece.
3. Transportation: By DHL/TNT/Fedex express, air, sea, train.
Q: How about discount ?
A: Price is based on products and order quantity.
Q: Do you accept sample order?
A: Yes sure, please contact us for details.
Q: How about your after-sales service?
A: As a manufacturer, we offer promt technology support for all problems and questions. Besides, we accept goods return or replace for quality problem.
For more information, please contact:
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
roschen.en.made-in-china.com
roschen.en.made-in-china.com
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