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| Place of Origin | CHINA |
| Brand Name | ROSCHEN |
| Certification | ISO |
| Model Number | 3 1/2", 4", 4 1/2", 5" |
G105 Steel Double Tube Wall Drill Pipe , 4 1/2 inch Remet Threads RC Drill Pipe for mining drilling
Reverse Circulation Drill Rod / Double Wall RC Pipe For Reverse Cireulation Drilling
Product Description:
1. Steel grade: E75 R780 G105 S135
2. Specification: 42-140mm
3. Thread: For Vermeer, Ditch witch, Drillto
We can manufacture all kinds of drill rod as per customer's requirments.
Features of RC 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.
ROSCHEN Reverse Circulation drilling (RC) ,from size 3" to 12", is a technique of drilling that uses dual wall drill rods that consist of an outer drill rod with an inner tube. By using compressed air to extract rock fragments sample,the samples travel through rods to a sample splitter at surface, avoiding all contact between the samples and the borehole wall that allows samples to be retrieved with minimal contamination,which is mainly used in deep hole exploration and mining grade control.
Reverse circulation is achieved by blowing air down the annulus of the rod, the differential pressure creating air lift of the water and cuttings up the inner tube which is inside each rod. It reaches the deflector box at the top of the drill string then moves through a sample hose which is attached to the top of the cyclone.
The drill cuttings travel around the inside of the cyclone until they fall through an opening at the bottom and are collected in a sample bag. For any drill hole there will be a large number of sample bags, each one marked to record the location and drilling depth that the sample was obtained.
The collected series of sample bag cuttings are later taken for analysis to determine the mineral composition of the drill hole. The analysis results of each individual bag represents the mineral composition at a particular sample point in the drill hole. Geologists can then survey the drilled ground analysis and make decisions about the value of the overall mineral deposit.
| Roschen Dual Wall RC Drill rod specification: | ||||||||||
| Pipe OD | Outer Tube | Inner Tube | Thread | Spanner Flat | Weight | |||||
| outer diameter | inner diameter | wall thickness | outer diameter | inner diameter | wall thickness | 3M | 6M | |||
| 3 1/2'' | 88.9 mm | 81.8 mm | 5.3 mm | 38.1 mm | 32.6 mm | 5.5 mm | 3 1/2'' Remet | 90 mm | 77 kgs | 125 kgs |
| 4'' | 101.6 mm | 94.6 mm | 7.1 mm | 50.8 mm | 45.3 mm | 5.5 mm | 4'' Remet | 90 mm | 77 kgs | 155 kgs |
| 4'' | 101.6 mm | 94.6 mm | 7.1 mm | 50.8 mm | 45.3 mm | 5.5 mm | 4'' Metzke | 90 mm | 77 kgs | 155 kgs |
| 4'' | 101.6 mm | 94.6 mm | 7.1 mm | 50.8 mm | 45.3 mm | 5.5 mm | 4'' Matrix | 90 mm | 77 kgs | 155 kgs |
| 4 1/2'' | 114.3 mm | 107.2 mm | 7.1 mm | 63.5 mm | 58 mm | 5.5 mm | 4 1/2''Remet | 90 mm | 97 kgs | 172 kgs |
| 4 1/2'' | 114.3 mm | 107.2 mm | 7.1 mm | 63.5 mm | 58 mm | 5.5 mm | 4 1/2''Metzke | 90 mm | 97 kgs | 172 kgs |
| 4 1/2'' | 114.3 mm | 107.2 mm | 7.1 mm | 63.5 mm | 58 mm | 5.5 mm | 4 1/2''Matrix | 90 mm | 97 kgs | 172 kgs |
| Roschen Double wall Reverse Circulation drill pipe Specifications | |||||
| 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 | 1,1.5,3, 4.5,5,6 |
| WB127/76 | 127 | 76 | 162/168 | 41/21F | 4.5, 5, 6, 9.5 |
| DB127/76 | 127 | 76 | 184 | 51/2FH | 4.5, 5, 6, 9.5 |
| WB140/88 | 139.7 | 88 | 184 | 51/2FH | 4.5, 5, 6, 9.5 |
| WB219/130 | 219 | 130 | 240 | Factory standard | 4.5, 5, 6, 9.5 |
| WK76/32 | 76 | 32 | 78 | 3" Remet | 1.5, 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 | |
| Notes: | |||||
| Any special length, diameter against requests | |||||
| Any special thread, its available by customized | |||||
FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 7-10 days if the goods are in stock. or it is 15-25 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample need to pay the cost of products and freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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