Professional manufacturing of reverse circulation drill pipe/double
wall drill pipe
Product Description
Double Wall Drill Pipe 127" Od 6m longth for water wells
Double-arm drill pipe is also called double-layer drill pipe. It is
composed of inner and outer drill pipes (called inner pipe and
outer pipe). The inner and outer pipes form an annulus, which is a
channel for pumping the flushing medium to the bottom of the hole
during hydraulic rock drilling and center sampling drilling. The
center hole of the inner tube is used to discharge the flushing
medium and is integrally fixed, and the threaded button of the
outer tube is connected between each double-wall drill pipe to
ensure the transmission of torque and pressure. However, plug
connections are often used between the inner pipes, which generally
only serve as a circulating flushing medium. Therefore, a sealing
device should be installed at the insertion point.
Features of Drill Rod
1. Made of high-quality alloy steel.
2. All our drill pipes are heat treated.
3. Reasonable structure, reliable performance and high use
efficiency.
4. Good concentricity, high precision and long service life.
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
|
Application
Suitable for horizontal drilling of drill pipe in various complex
formations.
It is suitable for drilling with different sizes and weights.
Suitable for ground drilling machine jacking force, drag back force
requirements to choose different specifications of drill pipe
drilling.
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.
Drill pipe usage notes
1. New drill pipe should be pasted thread oil before connection
1. Apply thread oil before connecting new drill pipe
2. The drill pipe shall be inspected regularly
3. Customized according to special requirements of customers
