Matches 51 - 67 out of 67 < 1 2


Match Document Document Title
US20100108395 Drill bit assembly for fluid-operated percussion drill tools  
The invention relates to a drill bit assembly for fluid-operated percussion drill tools comprising a percussion bit (1) having a head portion (3) formed with an axially extending stub shank (32)....
US20150129308 Coating Of The Piston For A Rotating Percussion System In Downhole Drilling  
A system and method of fabricating a percussion tool that includes one or more coatings applied onto a piston, casing, and/or flow tube. The percussion tool includes a piston positioned in sliding...
US20110303464 Fluid Actuated Impact Tool with Solid Piston-Standard Bit Arrangement and Water Seal  
A fluid-actuated percussive impact tool includes a drill bit disposed partially within a casing for respective longitudinal movement between extended and retracted positions. A bearing having a...
US20100126772 HYDRO-PERCUSSIVE MECHANISIMS FOR DRILLING SYSTEMS  
A down-the-hole assembly includes a housing assembly having a head end and a bit end. The housing assembly further includes an inlet joint having an inlet channel defined therein, a sealing...
US20120193145 Vibrating Downhole Tool  
Disclosed is an apparatus for vibrating a downhole drill string operable to have a drilling fluid pumped therethrough. The apparatus comprises a tubular body securable to the drill string and...
US20100326733 Vibrating downhole tool  
Disclosed is an apparatus for vibrating a downhole drill string operable to have a drilling fluid pumped therethrough. The apparatus comprises a tubular body securable to the drill string and...
US20100236832 PERCUSSIVE DRILL BIT PROVIDED WITH AN IMPROVED CHUCK ASSEMBLY  
A percussive drill bit provided with an improved chuck assembly for a down-the-hole drill hammer. The bit has a head at its forward end with a shank extending from the head. The shank is screw...
US20140144705 Hydraulic Percussion Apparatus and Method of Use  
A hydraulic percussive apparatus is disclosed for generating vibrating forces to a pipe string. The apparatus is attached to the pipe string a central bore through which fluid may be introduced...
US20170152711 Down The Hole Hammer and Systems and Components Thereof  
A down the hole hammer (10) incorporates: an inner tube assembly (100); a fluid flow control system (200); a bit retaining system (400); a porting sleeve (600); and a piston (700). Each of the:...
US20170088932 MODIFIED SURFACE PROPERTIES OF PERCUSSION TOOLS USED IN DOWNHOLE DRILLING  
A system and method of fabricating a percussion tool that includes one or more surfaces modified using the ferritic nitrocarburization process. The percussion tool includes a piston positioned in...
US20160369565 MULTI-ACCUMULATOR ARRANGEMENT FOR HYDRAULIC PERCUSSION MECHANISM  
The present invention relates to a hydraulically powered percussion mechanism (12), comprising a piston (6) to impact a percussion bit (8). The percussion mechanism also includes a first...
US20160298390 DOWN-THE-HOLE HAMMER DRILL BIT ASSEMBLY  
A down-the-hole hammer drill bit assembly includes a foot valve and a drill component having respective abutment regions in the form of cooperating lugs and shoulders that may be engaged by...
US20160153237 DYNAMIC SEAL TUBE FOR A DOWN HOLE HAMMER DRILL  
The present invention is directed to a dynamic seal tube for use in pressurized fluid-driven down hole hammer drills. The dynamic seal tube is a tube that slides within the bore of the piston and...
US20160153236 PERCUSSION HAMMER BIT  
A drill bit for use with a percussion drilling apparatus can include an elongated body with a first end, a second end, and a longitudinal surface extending between the first and second ends. A...
US20160069135 RAM BORING DEVICE  
A ram boring device has a pressurized-fluid driven striking piston in a device housing and a rotating reversing device configured to urge the striking piston from a forward operation to a reverse...
US20160053541 Hydraulically Striking Device  
A hydraulically striking device having a cylinder body, the cylinder body forming a cylinder therein, a piston in the cylinder body, configured to move by means of a hydraulic fluid so as to...
US20150345227 DRILL BIT FOR A DOWN-THE-HOLE DRILL HAMMER HAVING NONCONCENTRICALLY OR SPIRALLY ARRANGED CUTTING INSERTS  
A drill bit for a down-the-hole drill hammer is provided that includes a head and a shank extending from the head. The head includes a plurality of non-concentrically or spirally arranged cutting...

Matches 51 - 67 out of 67 < 1 2