Description
The Characteristics Of RC Hammers
RC series reverse circulation DTH Hammer is the latest developed product of our companyIt is mainly used for deep exploration drillingand stope ore grade control.
It has the following characteristics:
1. Based on previous experience of ordinaryhammers, combined with the features of reversecirculation hammer, optimized internal structureand ideal energy transfer,thus ensuring theseries of hammers drilling with fast, smooth andcontinuous sampling.
2. The internal structure is very simple withcomponents of high rigidity, thus ensuring longlife and easy maintenance of the hammer.3. The collection tube adopts an integrativedesign and can be replaced withoutdisassembling the hammer.With carburizingtreatment, it has good abrasive resistance.4.Equipped with bits designed with patent.Simply by replacing the drill bit, the samehammer can drill holes of different sizesensuring that the sample is not contaminated.5. In difficult conditions such as loose soil, hardrock and plenty of water exists, sampling can bedone well.
Introduction of R.C.Drilling and R.C. DTH Hammers
I .Introduction of R.C. Drilling
R.C. drilling, referred to as “Center 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 center tube along with the sample cut by the drill bit.
II.The use and the advantages of the R.C.DTH Hammer:
1)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 stratas 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 bit.
4)Higher Sample Recovery
Because the sample is collected through the face of the 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.
