|
2014
|
Invention
|
Dynamic seal tube for a down hole hammer drill. The present invention is directed to a dynamic se... |
|
2012
|
Invention
|
Down-the-hole hammer drill. A down-hole hammer includes a two-piece drill bit retained in a casin... |
|
2007
|
Invention
|
Down-the-hole hammer drill. There is provided a downhole hammer including a drill bit (2) retaine... |
|
2005
|
Invention
|
Manual tong. A manually or mechanically/hydraulically operable tong of light weight and high load... |
|
2004
|
Invention
|
Downhole hammer drill. There is provided a down hole hammer having a drive sub or chuck (10) havi... |
