|
2019
|
Invention
|
Pneumatic drilling with packer slideable along stem drill rod. A bottom hole assembly (BHA) and m... |
|
2017
|
Invention
|
Locking bit retention system. A bit retention system for a hammer drill including a housing (41),... |
|
2007
|
Invention
|
Elayed compression sleeve hammer. A sleeve (20) carried by and preferably slidable relative to th... |
|
2006
|
Invention
|
Delayed compression sleeve hammer. A sleeve carried by and preferably slidable relative to the pi... |
|
2004
|
Invention
|
Variable timing for front chamber of pneumatic hammer. The lower end portion of a pneumatic impac... |
|
2003
|
Invention
|
Integral bit retention system.
A percussion bit assembly includes a percussion bit having an upp... |
|
2001
|
Invention
|
Bit retention system. A bit retainer for a percussion bit assembly has a bore and upper and lower... |
|
|
G/S
|
Pneumatic down hole hammers |
|
1999
|
Invention
|
Method and device in down-the-hole drilling. The invention relates to a method, device and drill ... |
|
|
G/S
|
Drill bits for pneumatic down hole hammers |
|
1998
|
Invention
|
Bit retention system. A downhole hammer bit including at least one bit impact head mounted to a v... |
|
|
Invention
|
Back end connection in a downhole drill. A pneumatic downhole impact drill has a backhead for mou... |
|
|
Invention
|
Bit retention system. A substantially tubular retainer member is provided, having a bore of subst... |
|
|
Invention
|
Porting system for back chamber of pneumatic hammer. A pneumatic downhole impact drill has a port... |
|
1991
|
Invention
|
Porting system for pneumatic impact hammer. A pneumatic downhole impact drill having a porting sy... |
|
1990
|
Invention
|
Downhole drill bit and bit coupling. A downhole impact drill having a drill bit head (14) with a ... |
|
|
Invention
|
Downhole drill bit and bit coupling. 2070634 9109203 PCTABS00005A downhole impact drill having a ... |
|
1989
|
Invention
|
Downhole drill bit and bit coupling. A downhole impact drill having a drill bit head with a drill... |
|
|
Invention
|
Impact drill bit assembly and replaceable parts thereof. A downhole drill bit having an elongated... |
|
1988
|
G/S
|
VALVELESS PNEUMATIC DOWN HOLE HAMMERS |
|
1982
|
G/S
|
Down-Hole Water, Oil and Gas Drilling Equipment-Namely, Bits, Hammers, Rotary Drill Pipe, Adaptor... |
