Product Description
KSQ offers a complete line of Reverse Circulation hammers and spare
parts, which can replace KSQ series Reverse Circulation Hammers
& Bits. Hammers are available in a wide range of sizes and
styles, to provide maximum performance and longevity on all RC
drilling jobs.
Reverse Circulation hammers are designed with an inner sample tube
that extends through the center and into the top of the hammer bit.
The RC hammer exhausts the air between the bit splines and over the
face of the bit. This forces the sample into the recovery holes in
the face of the bit, through the center of the hammer and upward
through the drill rod inner tubes to the surface for collection.
The use of a shroud or collar is required when a RC hammer is used,
to help direct the return air and cuttings up through the face of
the bit.
Conventional DTH hammers can also be used in RC drilling
operations, but increase the potential for sample loss and
contamination. A conventional DTH hammer is used in conjunction
with a cross-over sub located between the hammer and drill rod. The
sample travels from the face of the bit up the outside of the
hammer and into the cross-over sub.
The sub directs the sample up the center of the dual wall rods and
to the surface.
REVERSE CIRCULATION DRILLING HAMMERS AND BITS
We offer a full range of reverse circulation down the hole hammers
and bits, to suit all depths and ground conditions.
Due to its high-quality sample results, and speed of operation for
shallower holes, reverse circulation drilling is becoming
increasingly popular around the globe. In fact, it's the most
widely accepted chip sampling method. This is largely due to our
innovative designs, and we're continuing to develop the
capabilities of this valuable sampling method. Partner with KSQ for
your reverse circulation down hole hammer drilling.
Reverse Circulation Hammers Specification:
| Reverse Circulation Hammers |
| Description | Weight(kg) |
| RC45 | RC55 | RC65 | RC52 |
| 1. Internal Circlip | 0.03 | 0.04 | 0.05 | 0.04 |
| 2. Air Screen | 0.35 | 0.44 | 0.65 | 0.44 |
| 3. Top Sub | 6.50 | 9.65 | 20.00 | 9.65 |
| 4. "O" Ring | 0.01 | 0.02 | 0.02 | 0.02 |
| 5. Sample Tube | 5.10 | 6.72 | 12.50 | 6.75 |
| 6. Check Valve | 0.25 | 0.68 | 0.85 | 0.68 |
| 7. Spring | 0.04 | 0.12 | 0.10 | 0.12 |
| 8. "O" Ring | 0.01 | 0.02 | 0.02 | 0.02 |
| 9. Air Distributor | 0.85 | 1.48 | 3.50 | 1.48 |
| 10. "O" Ring | 0.02 | 0.01 | 0.02 | 0.01 |
| 11. Internal Cylinder | 2.20 | 4.12 | 4.20 | 4.12 |
| 12. Piston | 8.50 | 16.90 | 24.00 | 16.90 |
| 13. External Cylinder | 14.50 | 19.50 | 32.00 | 21.50 |
| 14. Guided Sleeve | 1.20 | 0.90 | 5.50 | 1.90 |
| 15. "O" Ring | - | - | - | 0.02 |
| 16. Stop "O" Ring | - | - | - | 0.01 |
| 17. Stop Ring | - | - | - | 0.32 |
| 18. Shrout | - | - | - | 1.86 |
| 19. Drive Chuck | 3.20 | 5.65 | 6.50 | 4.17 |
| 20. Bit Retaining Pin | 0.01 | 0.15 | 0.30 | - |
| 21. Drill Bit | 10.50 | 15.80 | 31.00 | 11.05 |
| Technical Data |
|
| Model | NRC45 | NRC55 | NRC65 | NRC52 |
| Length (Without Bit) | 1020mm | 1111mm | 1250mm | 1208mm |
| Weight (Without Bit) | 94.00kg | 66.50kg | 110.00kg | 70.00kg |
| External Diameter | φ99mm | φ126mm | φ146mm | φ126mm |
| Bit Shank | NRC45 | NRC55 | NRC65 | PR52 |
| Hole Range | φ114 - φ127mm | φ133- φ152mm | φ155- φ190mm | φ133- φ146mm |
| Connection Thread | As required | As required | As required | As required |
| Working Pressure | 1.0 - 3.0 Mpa | 1.5 - 3.5 Mpa | 1.5 - 3.5 Mpa | 1.5 - 3.5 Mpa |
| Impact Rate at 17 Bar | 30HZ | 35HZ | 28HZ | 35HZ |
| Recommended Rotation Speed | 25 - 40 r/min | 25 - 40 r/min | 25 - 40 r/min | 25 - 40 r/min |
| Air Consumption | 1.0Mpa: 8 m³/ min | 1.7Mpa: 16 m³/ min | 1.7Mpa: 20 m³/ min | 1.7Mpa: 16 m³/ min |
| 1.8Mpa: 12 m³/ min | 2.4Mpa: 22 m³/ min | 2.0Mpa: 26 m³/ min | 2.4Mpa: 22 m³/ min |
| 2.4Mpa: 16 m³/ min | 3.0Mpa: 28 m³/ min | 3.0Mpa: 35 m³/ min | 3.0Mpa: 28 m³/ min |
Advantages:
1. High penetration rates in all rock conditions
2. Quality samples from areas of lost circulation
3. Large, uncontaminated sample return
4. Increased longevity means lower cost per meter
5. The option of diamond-enhanced carbide bits for deep and
abrasive drilling conditions, with no bits sharpening required
