Drilling Know-How

Read short articles from the Dando drillers giving tips and advice on drilling techniques and procedures.

Terrier Video: Mineral Sands

By Tomway | Nov 18, 2017 | Comments Off on Terrier Video: Mineral Sands

Dando’s Callum me as just returned from a visit to customer Green Gold Engineering who are sampling mineral sands in Indonesia. The geology in the area poses many difficulties for representative sample recovery at high levels with running sands being a particular problem. Ask any driller how the approach running sands and you are likely … Read more

Blocked Bit When Drilling With Mud

By Taylor | Oct 30, 2017 | Comments Off on Blocked Bit When Drilling With Mud

Have you ever blocked your bit off when drilling with mud and when you pull out you find that the bit and the first one or two drill rods above the bit are full of sand? If you are unsure as to the reason why this has happened it is because of an imbalance of … Read more

Drilling Techniques for Mineral Exploration

By Taylor | Oct 28, 2017 | Comments Off on Drilling Techniques for Mineral Exploration

In this article Dando looks at the three different types of drilling used for mineral exploration and the pros and cons of each. These drilling techniques are: Conventional Rotary Air/Mud Drilling Reverse Circulation Drilling Diamond Core Drilling Conventional Rotary Air/Mud Drilling Perhaps the least expensive method of drilling, the conventional rotary technique is by far … Read more

Choosing the Right Drill Bits

By Taylor | Oct 26, 2017 | Comments Off on Choosing the Right Drill Bits

A contractor who purchased a Terrier with rotary capabilities for site investigation work has been in touch with us recently. He was concerned that the rig and/or tooling did not appear to be performing properly on a contract he was currently employed on. This contract involved taking core samples with a conventional T2101mm water flush … Read more

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