After two unsuccessful attempts of diamond drilling the North Pole locality due to highly weathered basalts that broke the drill rig, we decided to change strategy and undertake percussion ...

The resulting top-down percussion drilling gives taper-free, elongated, and crack-free holes with glossy inner walls.

Additionally, advancements in rotary percussion drilling techniques have been investigated. This method aims to enhance rock-breaking efficiency by analyzing the relationship between percussion ...

Current wells using percussion drilling are taking an average of 40 ... The first incident occurred when the rig unintentionally pulled an 8-in. collar into the RCD, which damaged the RCD bearing.

A nylon bearing-swell problem almost led to the abandonment of a project to develop a new percussion hammer drill ... The maker of drill rigs, rock excavation and construction equipment was ...

Martin French, Executive Chairman said "We are very pleased with the percussion drill campaign so far, with sulphide mineralisation now encountered at the first three targets, which is better than ...