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[China]
Trade Verify
Address: Yongqing Industrial Zone, Langfang, Hebei, China
Contact name:Lily Gao
Langfang Baiwei Drill Co., Ltd. |
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Verified Suppliers
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Customized Double Wall RC Drilling Rod Trenchless Double Wall Drill Pipe
Product Description
Trenchless double wall drill pipe is composed of inner drill pipe and outer drill pipe (called inner pipe and outer pipe).
The inner cavity hole of the inner drill pipe is a pumping water or mud channel to the construction hole during operation.
During engineering operation, the outer drill pipe is connected with each other by thread, and the inner drill pipe is connected by male and female joints of internal and external hexagonal structure.
When the internal and external drill pipe is driven by power output in a time-sharing way, it adopts the shift mode to independently rotate and transmit torque.
Double wall drill pipe
| Type | O.D.of the outer tube (mm) | I.D.of the inner tube (mm) | Outer dianeter of joint (mm) | Type of threads | Effective length (m) |
| WB114/65 | 114 | 65 | 156 | 41F | 6 |
| WB127/76 | 127 | 76 | 162/168 | 41/21F | 6 , 9.5 |
| DB127/76 | 127 | 76 | 184 | 51/2FH | 9.5 |
| WB140/88 | 139.7 | 88 | 184 | 51/2FH | 6,9.5 |
| WB219/130 | 219 | 130 | 240 | Factory standard | 6,9.5 |
| WK76/32 | 76 | 32 | 78 | 3" Remet | 3 |
| WK102/41 | 102 | 41 | 103 | 4" Remet | 3 , 6 |
| WK114/52 | 114.3 | 52 | 116 | 4 1/2" Remet | 3 , 6 |
| WK114/38 | 114.3 | 38 | 114.3 | 4 1/2" Metzke | 3 , 6 |
| WK114/50 | 114.3 | 50 | 114.3 | 4 1/2" Remet | 3 , 6 |
| WP50/20 | 50 | 20 | 50 | 1 , 1.5 | |
| WP73/35 | 73 | 35 | 73 | 1 , 1.5 | |
| WP89/40 | 89 | 40 | 89 | 1 , 1.5 |
Features of Drill Rod
1. Made of high quality alloy steel.
2. All our drill rods are heat-treated.
3. Reasonable structure, reliable performance and high using efficiency.
4. Good concentricity, high precision and long service life.
Used in
Our drill rods are suitable to drill deep holes. They are widely used in geological and mineral, metallurgy, mining, oil drilling industries and so on. From drillers' feedback, our rods have drilled up to 2000 meters depth. BaiWei has many years experience in manufacturing coring drill rod, we try to provide you the most cost-efficient products.
Drill pipe quality control:
1. Before order to be confirmed, the raw material of pipe and tool joint body should be booked from famous big steel enterprises in China.
2. Checked by our QC staff and factory own laboratory.
3. Every drill pipe has nondestructive inspection , cleaned and breach oil before packing.
4. Before delivery clients could send one QC or point the third party to check the quality such SGS, BV or others.
Our Services:
1. Drill pipe strictly according to API ISO9001 standard.
2. If you found to quality problems within one month of the package returned.
3. All strictly according to the contract and fulfill the obligations and responsibilities.
4. 24 hours online customer service,feel free contact us.
