Rope Coring Drill Pipe
- BEILAI
- CHINA
Product Size
Nominal outside diameter: Ø43.5mm ~ Ø114.3mm
Wall thickness :4.75mm ~ 6.4mm
Length :6.0m-12m
Coring with rope is an advanced drilling method which can obtain the core without raising the bit or lesser raising bit frequency . It requires drill tool must be capable for coring and lifting the inner pipe in the drill pipe. Due to this rope coring different from other drilling tools. Main advantages of rope Coring is high production efficiency and low drilling cost.
Standard
JIS G3465 Seamless steel tube for drilling ; GB/T 9808 Seamless steel tubes for drilling; GB/T 16950 Geological core drilling tool.
Grade(Beilai) | Yield strength/Mpa | Tensile strength(MPa) | Elongation A/% |
BL380/R640 | ≥380 | ≥640 | ≥14 |
BL490/R690 | ≥490 | ≥690 | ≥12 |
BL520/R780 | ≥520 | ≥780 | ≥15 |
BL540/R740 | ≥540 | ≥740 | ≥12 |
BL590/R770 | ≥590 | ≥770 | ≥12 |
BL640/R790 | ≥640 | ≥790 | ≥12 |
BL740/R840 | ≥740 | ≥840 | ≥10 |
Note: a Grade bl520 Rp0.5 b Grade BL520 tensile specimens adopt S4, S5 or S6 from GB/T228 | |||
Advantages
1. Reduce labour cost.
2. Reduce mechanical wear and wire rope consumption.
3. Improves bore hole quality.
4. Improves core recovery rate.
5. Reduce auxilary time
6. Flexible and durable auxiliary tools and equipment.
7. High strength internal and external flat drill pipe.
8. Extend bit life.
9. Adopt reasonable drilling procedure and coring operation.
