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2019
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Invention
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Pneumatic drilling with packer slideable along stem drill rod. A bottom hole assembly (BHA) and m... |
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2017
|
Invention
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Locking bit retention system. A bit retention system for a hammer drill including a housing (41),... |
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2007
|
Invention
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Elayed compression sleeve hammer. A sleeve (20) carried by and preferably slidable relative to th... |
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2006
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Invention
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Delayed compression sleeve hammer. A sleeve carried by and preferably slidable relative to the pi... |
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2004
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Invention
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Variable timing for front chamber of pneumatic hammer. The lower end portion of a pneumatic impac... |
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2003
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Invention
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Integral bit retention system.
A percussion bit assembly includes a percussion bit having an upp... |
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2001
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Invention
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Bit retention system. A bit retainer for a percussion bit assembly has a bore and upper and lower... |
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P/S
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Pneumatic down hole hammers |
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1999
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Invention
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Method and device in down-the-hole drilling. The invention relates to a method, device and drill ... |
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P/S
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Drill bits for pneumatic down hole hammers |
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1998
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Invention
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Bit retention system. A downhole hammer bit including at least one bit impact head mounted to a v... |
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Invention
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Back end connection in a downhole drill. A pneumatic downhole impact drill has a backhead for mou... |
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Invention
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Bit retention system. A substantially tubular retainer member is provided, having a bore of subst... |
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Invention
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Porting system for back chamber of pneumatic hammer. A pneumatic downhole impact drill has a port... |
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1991
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Invention
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Porting system for pneumatic impact hammer. A pneumatic downhole impact drill having a porting sy... |
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1990
|
Invention
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Downhole drill bit and bit coupling. A downhole impact drill having a drill bit head (14) with a ... |
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|
Invention
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Downhole drill bit and bit coupling. 2070634 9109203 PCTABS00005
A downhole impact drill havi... |
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1989
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Invention
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Downhole drill bit and bit coupling. A downhole impact drill having a drill bit head with a drill... |
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Invention
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Impact drill bit assembly and replaceable parts thereof. A downhole drill bit having an elongated... |
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1988
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P/S
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VALVELESS PNEUMATIC DOWN HOLE HAMMERS |
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1982
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P/S
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Down-Hole Water, Oil and Gas Drilling Equipment-Namely, Bits, Hammers, Rotary Drill Pipe, Adaptor... |
