线图用于展示结构，最终尺寸与接头以确认的规格为准。
产品详情
Two Tubes, Two Jobs
In reverse circulation drilling the sample comes back up the centre of the string while air or fluid goes down the annulus between the two tubes. That means a dual-wall pipe has to do two things at once: survive the abrasion of cuttings travelling at speed through the inner tube, and hold pressure in the outer tube without leaking.
Material and Heat Treatment
Both tubes are made from high-strength alloy material and heat treated, which is what gives long inner and outer tube life rather than one tube outlasting the other and stranding the pipe.
Seals
Seals are made to KISN's own specification rather than bought in. A worn seal turns the annulus into a leak path and the sample stops coming up cleanly, so seal life is one of the main things that decides how long a string stays in service. Custom seals are used to extend that life and reduce leakage.
Interchangeability
Inner and outer tubes are machined to precision, which allows universal interchangeability between tubes. In practice this means a damaged inner tube can be replaced without scrapping the outer, and components from different batches will still assemble.
Sizes
89 mm, 102 mm and 114 mm pipe sizes, with outer tube OD and wall, inner tube OD and wall, length and thread listed for each on this page.
Where It Works
Reverse circulation drilling for mineral exploration, grade control, water well investigation and geotechnical work where an uncontaminated sample matters.
Where It Ships
Supplied to exploration and drilling contractors in Africa, Southeast Asia and the Middle East.
技术规格
| 规格 | 外管外径 MM | 外管壁厚 MM | 内管外径 MM | 内管壁厚 MM | 长度 MM | 螺纹 |
|---|---|---|---|---|---|---|
| 89 钻杆 | 89 | 6 | 50 | 6 | 1500-6000 | REMRT 3-1/2 |
| 102 钻杆 | 102 | 6.3 | 60 | 7 | 1500-6000 | REMRT 4 |
| 102 钻杆 | 102 | 6.3 | 60 | 7 | 1500-6000 | METZKE 4 |
| 102 钻杆 | 102 | 6.3 | 60 | 7 | 1500-6000 | MATRIX 4 |
| 102 钻杆 | 102 | 6.3 | 60 | 7 | 1500-6000 | R40 |
| 102 钻杆 | 102 | 6.3 | 60 | 7 | 1500-6000 | DR 102 |
| 102 钻杆 | 102 | 6.3 | 60 | 7 | 1500-6000 | M40 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | REMRT 4-1/2 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | METZKE 4-1/2 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | MATRIX 4-1/2 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | R45 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | DR115 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | M45 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | CSR1 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | CSR2 |
| 114 钻杆 | 114 | 8.38 | 60 | 7 | 1500-6000 | FABER 4-1/2 |
可接受样品与技术资料进行定制。
常见问题
What is dual-wall or reverse circulation drill pipe?
It carries two tubes. Air or fluid travels down the annulus between them and the sample returns up the centre, which keeps the sample uncontaminated and the hole clean.
What sizes are available?
89 mm, 102 mm and 114 mm pipe sizes. Outer and inner tube dimensions, wall thicknesses, length and thread are listed on this page.
Can inner and outer tubes be replaced separately?
Yes. Tubes are precision-machined to allow universal interchangeability, so a damaged tube can be replaced without replacing the whole assembly.
Do you supply custom seals?
Yes. Seals are made to our own specification to extend seal life and reduce leakage.
What is the minimum order and lead time?
Standard minimum order is 10 pieces, with a lead time of 10 days. Special specifications are made to order.