|
CN103339347A
|
|
Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material
|
|
WO2011102785A1
|
|
Method and arrangement for sampling of bedrock
|
|
WO2011075045A1
|
|
An arrangement for joining double-walled drill rods and double-walled drill rod
|
|
CA2749972A1
|
|
Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting
|
|
CA2750853A1
|
|
Drill bit for a down-the-hole drill
|
|
US6994175B2
|
|
Hydraulic drill string
|
|
AU2003232709A1
|
|
Drill rig combination for rock drilling
|
|
AU2003206573A1
|
|
Method and device for directional down-hole drilling
|
|
SE0203421D0
|
|
Rock drilling device with fluid operated hammer, has spring loaded check valve formed by sliding cone located in fluid supply line for sink drill
|
|
WO03064805A1
|
|
Liquid driven downhole drilling machine
|
