Conventional Diamond Core Drilling Depth Up To 550 Meters Drilling Solid Core Of

Product Specification

Conventional Diamond Core Drilling Depth up to 550 meters Drilling solid core of rocks
 
Conventional Diamond Core Drilling Depth up to 550 meters Drilling solid core of rocks
 
Conventional Diamond Core Drilling
 
Core Drilling
 

Roschen have the capability to carry out diamond core drilling in various diameters - to depths up to 550m.

NLMC = 51.9mm diameter core, resulting in a 75.7mm diameter holes.
 
HQ3 = 63.5mm diameter core, resulting in a 96mm diameter hole

PQ3 = 83mm diameter core, resulting in a 122.3mm diameter hole

4C = 101.6mm diameter core, resulting in 139.7mm diameter hole.

Core drilling provides a continuous intact core sample from the borehole. Coring is the most expensive drilling option but provides the most detailed information on the rock material and allows sampling and laboratory testing of the samples.
 
As the drill bit advances, a cylindrical core of rock progressively fills a triple tube core barrel (double tube barrels are also used by some companies) immediately above the core bit. Core samples are periodically recovered, (Roschen use 3.0m long core barrels,) at the end of the core "run" the complete barrel and the drill rods are pulled from the hole, the end of the barrel is disassembled by removing the core bit and catcher, the the stainless steel splits are then pumped out of the inner barrel by using high pressure water. The splits are then opened to reveal the core in virtually undisturbed condition.
 

Rotation speeds during diamond core drilling can vary up to 1500 rpm depending on the material being drilled and core size and drill bit being used. Penetration rates are slower than other methods generally due to the hardness and at times the weakness of the rock, plus the time taken to retrieve the core barrel when drilling at deeper depths. An alternative to Conventional core drilling is wireline core drilling this can speed the drilling progress up especially when drilling deeper holes -
 

Wireline Core Drilling
Roschen also have the capability to carry out wireline core drilling.
 
Wireline core drilling is the same principle as conventional core drilling whereby a solid core of rock is collected within the core barrel, the difference is how the core barrel is retrieved from the borehole. When the core barrel is full or the run is finished instead of the complete drill string - rods and core barrel being pulled from the hole, the core rods and outer core barrel remain in the hole and only the inner core barrel is retrieved by lowering a cable with an overshot down the core rods. The overshot attaches to the top of the inner tube/barrel of the core barrel and then the assembly is winched to the surface. The inner barrel is disassembled and the core pumped from the inner barrel as is done in conventional core drilling.

Wireline core drilling requires a completely different set of gear - bits, rods and associated tooling to that used for conventional core drilling which is not generally carried with the rigs at all times - please let your Roschen contact know if you require wireline core drilling prior to mobilisation to site.
 
 


Applications: 
 
Does Roschen carry out Exploration drilling?
 
Yes, Roschen carries out exploration drilling - we have rigs with varying capabilities of up to 500m. We have previously worked on exploration projects all over Queensland and therefore have valuable experience in the field. We also have experienced site supervisors and geologists and are able to provide a "turn key" package

Does Roschen carry out Geotechnical Drilling?
Yes Roschen carries out geotechnical drilling and associated services. We have 5 rigs ranging from a small truck mounted auger rig with SPT capabilities, to our larger truck mounted drilling rigs which can reach depths of 350m plus. We also offer experienced geologists/geotechnical engineers for site supervision, project management, soil and rock logging, safety management and monitoring. We can carry out test pitting services with associated DCP testing and soil sampling.

Can Roschen drill water monitoring bores?
Yes, Roschen can drill water monitoring bores and install monitoring wells to detailed specifications.

Can Roschen carry out other geotechnical site services?
Yes, Roschen can carry out associated geotechnical site services such as Test Pitting and associated soil sampling and DCP testing, Window sampling, Service locating, Traffic management, Access creation, Site rehabilitation and Slashing

Can Roschen provide site supervision and professional services?
Yes, Roschen has experienced geologists/geotechnical engineers that can supervise the drilling rigs/excavators, Provide soil and rock logging services, Project management, Client liaison, Safety management, Safety monitoring and Factual reporting.

Does Roschen work interstate?
Yes, Roschen will work interstate

Do Roschen have inducted staff for mine and Petroleum and Gas sites?
Roschen have staff that are inducted onto various mine sites throughout Queensland plus several petroleum and gas sites such as Origin Energy, Santos, Arrow Energy, QGC, AGL amongst others.

What diameter borehole can Roschen drill?
Roschen can drill a variety of different diameter holes depending on the borehole/project requirements - ranging from 100mm diameter to 250mm diameter.



Systems of Core Barrels: 
 

FAQ
 

Terms & Conditions of Ordering:

1. Payment Terms:
T/T (Telegraphic Transfer) or Western Union

2. Delivery Term:
Based on order quantity, normally it takes 10 days for production.
Only 2 or 3 days if we have stock on your request size.

3. Transportation:
Sample order: we suggest Courier express or by air
Bulk order: we suggest by air or by sea.

4. Quality & Service:
A. There will be strict inspection and testing for every order before shipping out.
B. Our sales team and Technical Support will response for your question within 24 hours through skype: ROSCHEN.TOOL and WhatsApp/Wechat: +86-13764195009
C. Free replacement will provide once the failure confirmed caused or our product quality; Not satisfied with a refund.

For more information please contact:

ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED

Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
 

WeChat: +86-137 6419 5009 ; +86-135 8585 5390
 

WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390
 

Email: roschen@roschen.com ; roschen@roschen.net

Website: http://www.roschen.com ; http://www.roschen.net
http://www.roschen.cn ; http://www.roschendrill.com
http://www.roschenmining.com ; http://www.roschendrilling.com
http://www.roschengroup.com