Geotech & Environmental
Air Core Drilling
his is an inexpensive method of exploration drilling that can be employed when safe removal of sample material is paramount. Where possible, it is preferred over RAB (Percussion rotary air blast drilling) drilling and unlike the diamond drilling method, which withdraws a small diameter core of rock from the orebody, air core drilling is much faster and more cost-effective.
Air core drilling relies on compressed air to flush cutting samples out of your drill holes. This enables the safer collection of samples without unnecessary damage to the surrounding area and results in a more effective analysis sample. It is often used in first pass exploration drill programs to provide accurate samples.
Reverse Circulation Drilling
RC drilling is similar to air core drilling, in that the drill cuttings are returned to the surface inside the rods. RC drilling is a quick cheap first pass exploration hole option, it achieves better penetration than air core drilling; it is cheaper than diamond coring and is thus preferred for most mineral exploration work.
Reverse circulation is achieved by blowing air down the rods, the differential pressure creating air lift of the cuttings up the inner tube which is inside each rod. It reaches the bell at the top of the hole, then moves through a sample hose which is attached to the top of the cyclone. The drill cuttings travel around the inside of the cyclone until they fall through an opening at the bottom and are collected in 1m intervals into a sample bag.
Sonic drilling is a technique that strongly reduces friction that makes penetrating for a large range of soils easier and faster. It is capable of retrieving many types of formation,gravels running sands etc The vibrations of the drill bit cause the soil to lose structure which changes its density. This way the soil & cuttings move in the sample barrel and up the drill string to help the tooling advance freely.
Sonic drilling does not necessarily require air or drilling mud while drilling. This makes sonic drilling the preferred method for geotechnical, geo-construction and environmental applications.
Diamond Core Drilling
Diamond core drilling utilizes an annular diamond-impregnated drill bit attached to the end of hollow drill rods to cut a cylindrical core of solid rock. Holes within the bit allow mud to be delivered to the cutting face. This provides three essential functions; lubrication, cooling, and removal of drill cuttings from the hole. Diamond drilling is much slower than reverse circulation (RC) drilling due to the hardness of the ground being drilled.
Our principal product is drill core, and we aim to achieve prompt delivery of this product to the customer every time. Our objective is to provide a reliable and first-rate service to the industry, making us leaders in drilling efficiency.
Our customers consist of various major exploration and mining companies, including L & M Coal seam and Gas, L & M Petroleum, Oceana Gold, Newmont Asia Pacific and other public-sector organizations.
Down hole surveys
By using inclination and deviation surveys using our FlexIT SmartTool camera, the location of the drill hole in 3D can be located extremely accurate. In addition to these surveys we also can supply a down hole camera for video footage.