Centre Sample Recovery 3.5"/4" Remet Or 4"Metzke RE004 RC Hammer
Introduction of R.C. Drilling
R.C.drilling, referred to as"Centre Sample Recovery”or" Dual Wall
Drilling”, employs a Dual Wall Pipe where the drilling medium,
normally high pressure air. Is passed between the outer and inner
tubes down to the face of the drilling bit where it is returned up
the centre tube along with the sample cut by the drill bit.
The use and the advantages of the R.C. DTH Hammer
I) No Contamination
The R.C. System collects sample through the recovery holes in the
face of the drill bit immediately as the cuttings or sample is
formed. The drilled sample does not have to travel the length of
the hammer where contamination and loss of sample takes place.
2) Higher Production
In broken and fractured ground conditions, the R.C.will often out
perform the conventional hammer in terms of penetration rates.
3) Dry Sample
Even in certain water bearing strata, it is still possible to
collect a dry sample because the cuttings (sample) are collected as
they are formed through the face of the drill
4) Higher Sample Recovery
Because the sample is collected through the face of e drill bit
there is no loss of sample when drilling through broken or
fractured ground. And since the bit matched to the chuck size,
there is very little bypass of sample and recovery rates of up to
98% are generally achievable.
Reverse Circulation Hammers Specification:
| 4" RC Hammer | Item Description | Weight(kg) | Part Number |
  | A Top sub Assy Remet 3.5" |
| 1 Circlip of top sub | 0.03 | 004-R3.5-01 |
| 2 O Ring of Adaptor Screen x3 | 0.02 | 004-R3.5-02 |
| 3 Adaptor Screen | 0.85 | 004-R3.5-03 |
| 4 O Ring of Adaptor Screen x2 | 0.02 | 004-R3.5-04 |
| 5 Top sub | 8.45 | 004-R3.5-05 |
| B Top sub Assy Remet 4" |
| 1 Circlip of top sub | 0.03 | 004-R4-01 |
| 2 O Ring of Adaptor Screen x2 | 0.02 | 004-R4-02 |
| 3 Adaptor Screen | 1.05 | 004-R4-03 |
| 4 O Ring of Adaptor Screen x2 | 0.02 | 004-R4-04 |
| 5 Top sub | 7.80 | 004-R4-05 |
| C Top sub Assy Metzke 4" |
| 1 Circlip of top sub | 0.03 | 004-M4-01 |
| 2 Adaptor Screen | 0.85 | 004-M4-02 |
| 3 O Ring of Adaptor Screen x2 | 0.02 | 004-M4-03 |
| 4 Top sub | 7.60 | 004-M4-04 |
| Parts List |
| 6 Plunger | 0.55 | 004--05 |
| 7 Y Ring of Plunger x1 | 0.02 | 004--06 |
| 8 Spring | 0.06 | 004--07 |
| 9 Sample Tube Upper | 1.10 | 004--08 |
| 10 O Ring of Sample Tube x2 | 0.02 | 004--09 |
| 11 O Ring of Sample Tube x1 | 0.02 | 004--10 |
| 12 Sample Tube | 2.65 | 004--11 |
| 13 Compressoin buffer | 0.20 | 004--12 |
| 14 Air Distributor | 1.85 | 004--13 |
| 15 O Ring of Air Distributor x1 | 0.02 | 004--14 |
| 16 Inner Cylinder | 2.45 | 004--15 |
| 17 Piston | 10.45 | 004--16 |
| 18 Piston case | 17.85 | 004--17 |
| 19 Bush drive sub | 1.75 | 004--18 |
| 20 Bit retaining ring | 0.30 | 004--19 |
| 21 O Ring of Bit retaining ring X1 | 0.02 | 004--20 |
| 22 Shroud | 1.02 | 004--22 |
| 23 Drive sub | 3.05 | 004--23 |
| 24 Drill bit | | 004--24 |
RE004 RC Hammer Technical Parameters
| Length(Without Bit) | Weight(Without Bit) | External Diameter(mm) |
| 1252mm | 52.8kg | 107mm |
| Working Pressure | Impact Rate At 17 bar | Speed Recommended |
| 1.5-3.5 Mpa | 40Hz | 25-40rpm |
| Bit Shank | Hole Range | Connection Thread (top sub-drill pipe) |
| RE004 | 100mm-110mm | 3.5" /4" Remet 4" Metzke |
| Reference Air Consumption(m³/min) |
| 1.7 Mpa | 2.4 Mpa | 3.0 Mpa |
| 12 m³/min | 17 m³/min | 20 m³/min |
Applications
1. Mine and quarry
2. Road construction for the drilling and blasting work
3. Water well drilling
4. Slope protection
working principle
Pictures
KSQ Technologies (Beijing) Co. Ltd. has significant experience and
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The company caters to medium to large scale clients who are doing
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