Matches 1 - 50 out of 67 1 2 >


Match Document Document Title
US20140360783 PRESSURE CONTROL CHECK VALVE FOR A DOWN-THE-HOLE DRILL HAMMER  
A down-the-hole drill hammer for optimizing air consumption. The down-the-hole drill hammer includes a housing, a backhead connected to the housing, and a pressure control check valve assembly...
US20120006598 Down-the-Hole Drill Hammer Having a Sliding Exhaust Check Valve  
A down-the-hole drill hammer having a housing, a backhead and a tubular sliding check valve assembly that includes a distal end, a threaded male proximal end, a supply inlet and an exhaust port....
US20150129316 Top Mounted Choke For Percussion Tool  
A system and method of fabricating a percussion tool that includes a choke valve that is replaceable and/or maintainable without disassembly of the percussion tool. The flow tube includes inner...
US20110198129 METHOD AND DRILLING APPARATUS FOR DOWN-THE-HOLE DRILLING  
A method and drilling apparatus for drilling. The drilling is carried out by a drilling apparatus including a drilling device including a casing part and at least during drilling a drilling unit....
US20110192650 PERCUSSION DRILLING ASSEMBLY HAVING A FLOATING FEED TUBE  
A percussion drilling assembly for boring into the earth is disclosed. The percussion drilling assembly includes a top sub, a casing coupled to the top sub, and a feed tube assembly disposed...
US20130133952 ATTACHMENT FOR PERCUSSION DRILL TOOLS  
The present invention provides an attachment (1) for a fluid-operated percussion drill tool (2), the drill tool having a backhead assembly (4) for attachment to a drill rod (10). The attachment...
US20140332278 EXTENDED REACH DRILLING  
Apparatus, methods and uses that allow extended reach drilling by virtue of the provision in the drillstring and to downhole tools collective vibrations, not tuned specifically to a single...
US20090101413 DTH-hammer drilling device and overburden drilling method  
The invention relates to a DTH-hammer drilling device, comprising a down-the-hole- (DTH-) hammer (6) with a percussion drill bit (9), a drill pipe (2) with a waste conduit for the cuttings and at...
US20080257609 Pneumatically Reversible Ram Boring Device  
A pneumatically reversible ram boring device includes a percussion piston (8) that is situated in a casing (1) and is movable back and forth by operation air supplied via an operational-air supply...
US20080156539 Non-rotating drill system and method  
A pneumatically operated, deep hole rock drilling system for non-rotating drilling includes a pneumatically operated drive, a hammer sleeve with hammer mechanisms therein/connected thereto, a...
US20120247839 DRILLING APPARATUS  
A drilling apparatus including a hydraulically powered hammer having a piston to impact a drill bit; a shuttle valve to control reciprocation of the piston; and an accumulator for hydraulic fluid;...
US20120061142 DRILLING APPARATUS  
A drilling apparatus including a hydraulically powered hammer having a piston to impact a drill bit; a shuttle valve to control reciprocation of the piston; and an accumulator for hydraulic fluid;...
US20050045385 Down-the-hole drill hammer  
The present invention relates to an arrangement pertaining to down-the-hole hammers in which a driver (7) is adapted to transfer torsion forces between a rotating outer tube (10) and a drill bit...
US20060000646 Down-the hole hammer  
A down-the-hole hammer is described. It comprises an external cylindrical outer wear sleeve (10), an inner cylinder (9) mounted co-axially within the outer wear sleeve (10), a sliding piston (11)...
US20090166026 Jar device for use in coil tubing drilling  
The invention relates to a jar operated by fluid pressure, specially designed for use in drilling or maintenance operations carried out in oil or gas wells. The jar comprises a first (1) and a...
US20050173158 Compressed air percussive mechanism for a down hole hammer and down hole hammer  
Pressure-air driven percussion device for a down-the-hole drill (1) with a hammer-piston (86) which is axially reciprocally movable in a hammer-piston chamber (18) through a driving device (9),...
US20150129317 FIELD REMOVABLE CHOKE FOR MOUNTING IN THE PISTON OF A ROTARY PERCUSSION TOOL  
A choke assembly for controlling air flow into a piston of a percussion tool for downhole drilling includes a choke and a choke adapter. The choke comprises a choke body and a choke opening in the...
US20130206481 METHOD AND APPARATUS FOR CONTROLLING THE OPERATION OF CLUSTER DRILL OF DOWN-THE-HOLE HAMMERS  
An apparatus for drilling hole, comprising: a cluster drill of down-the-hole (DTH) percussion hammers having two or more DTH percussion hammers; and a special distributor having rotatable swivels...
US20090272555 PULSE MACHINE, METHOD FOR GENERATION OF MECHANICAL PULSES AND ROCK DRILL AND DRILLING RIG COMPRISING SUCH PULSE MACHINE  
According to one aspect of the invention hydraulic pressure pulses are created in a rock drill machine utilizing a rod (7, 7a, 7b) made of a magnetostrictive material arranged in one or more...
US20100059284 DOWN-THE-HOLE DRILL HAMMER HAVING A REVERSE EXHAUST SYSTEM AND SEGMENTED CHUCK ASSEMBLY  
A down-the-hole drill hammer is provided that includes a housing, a solid core piston mounted within the housing, a seal located between the solid core piston and the housing, and a backhead...
US20140076638 PRESSURIZED FLUID FLOW SYSTEM HAVING MULTIPLE WORK CHAMBERS FOR A DOWN-THE-HOLE DRILL HAMMER AND NORMAL AND REVERSE CIRCULATION HAMMERS THEREOF  
A pressurized fluid flow system for a down the hole drill hammer has a plurality of chambers that exert work, namely one or more auxiliary drive and lifting chambers besides two main chambers...
US20130068533 SEALED JAR  
A device has a first, lower sub housing, a second, upper sub housing, and an extensible joint connecting the lower sub housing to the upper sub housing. A pressure equalization chamber is attached...
US20110297447 Pressure Reversing Valve Assembly For a Down-the-Hole Percussive Drilling Apparatus  
A pressure reversing valve for a down-the-hole percussive drilling (“DHD”) apparatus has a first valve pressure surface, a second valve pressure surface and a third valve pressure surface. The...
US20080142263 Downhole Valve Mechanism  
In one aspect of the invention, a downhole tool string component comprises a fluid passageway formed between a first and second end. A valve mechanism is disposed within the fluid passageway...
US20150129315 Double Wall Flow Tube For Percussion Tool  
An apparatus, system, and method of fabricating a percussion tool that includes a flow tube. The flow tube includes upper and lower portions, inner and outer walls, and at least one opening formed...
US20130186692 DOWN-THE-HOLE HAMMER  
The present invention relates to a down-the-hole hammer comprising an external cylindrical outer wear sleeve (5), a sliding piston (8) mounted for reciprocating movement within the outer wear...
US20120186878 DOWNHOLE TOOL  
A downhole tool including a fluid-actuated piston and a motor-driven valve. The fluid-actuated piston is operatively associated with a reciprocating mass. The motor-driven valve is configured to...
US20110266067 DOWN HOLE HAMMER HAVING ELEVATED EXHAUST  
A percussive assisted rotary drill includes a top sub for connection with a drill pipe. The drill pipe imparts torque to the drill and also supplies motive fluid to the drill. The drill includes a...
US20090277687 ELECTRO-MECHANICAL THRUSTER  
A drilling system, including: a drill bit; and a thruster to apply a force to the drill bit. The thruster may include: an inner tubular member disposed within and configured to axially move within...
US20090277690 DRILLING JAR  
A bidirectional drilling jar, capable of repeated unidirectional firing, including a sliding assembly that is disposed in a sliding relation to the interior of a barrel assembly. A portion of the...
US20110209919 PRESSURIZED FLUID FLOW SYSTEM FOR A NORMAL CIRCULATION HAMMER AND HAMMER THEREOF  
A pressurized fluid flow system for a normal circulation down-the-hole hammer comprises a cylinder coaxially disposed in between an outer casing and a piston that reciprocates due to changes in...
US20060162965 Rock drill bit  
The present invention relates to a rock drill bit for percussive drilling. The drill bit comprises a bit body, a head portion defining a longitudinal center axis. The head portion includes an...
US20130277116 MUD MOTOR WITH INTEGRATED PERCUSSION TOOL AND DRILL BIT  
A downhole tool having a progressive cavity mud motor with an impact generator disposed within the mud motor rotor or bearing assembly. In one embodiment, the impact generator includes a mud...
US20120325558 Rock Drill Bit, a Drilling Assembly and a Method for Percussive Rock Drilling  
A rock drill bit for percussive drilling comprising a bit head configured to be attached at an end of a drill element of a drilling assembly and having a diameter larger than that of a said drill...
US20090188723 PRESSURIZED FLUID FLOW SYSTEM FOR A REVERSE CIRCULATION HAMMER  
A pressurized fluid flow system for a reverse circulation down-the-hole hammer comprising a cylinder (40) coaxially disposed in between the outer casing (1) and the piston (60); and two chambers...
US20130233626 PRESSURIZED FLUID FLOW SYSTEM FOR A REVERSE CIRCULATION DOWN-THE-HOLE HAMMER AND HAMMER THEREOF  
A pressurized fluid flow system for a reverse circulation down-the-hole hammer includes a cylinder and a cylindrical control tube that are respectively coaxially disposed in between the outer...
US20080078584 Bit assembly for down-hole drills  
A bit assembly is for a drill having a casing, a central axis and a hammer movably disposed within the casing. The bit assembly includes a chuck with a tubular body having first and second ends,...
US20090194336 Damping and Drilling Machine Including Such a Damping Device  
A damping device for inserting into a housing of an impulse producing drill machine, for damping Shockwave reflexes from a drill string connected to the drilling machine, is distinguished in that...
US20120039673 ARRANGEMENT FOR A DOWN-THE-HOLE HAMMER DRILL FOR USE IN SOIL CONSOLIDATION THROUGH JET GROUTING  
The invention concern an arrangement for a down-the-hole hammer drill (1), particularly for use in soil consolidation through a process known as “jet grouting”, and comprising a principally...
US20110017513 DRILLING UNIT, METHOD FOR SLOT DRILLING AND SLOTTING DEVICE  
A slotting device (100) to be used with a rock drilling apparatus (1) to drill closely together a plurality of parallel intersecting holes so as to form a slot in a brittle material, such as rock,...
US20100187017 Down-the-hole Drill Reverse Exhaust System  
A DHD hammer that can exhaust working air volumes partially through a proximal end of the DHD hammer's actuator assembly includes a drive chamber, a return chamber, and a backhead that includes...
US20150041217 METHOD AND APPARATUS FOR CREATING A PRESSURE PULSE IN DRILLING FLUID TO VIBRATE A DRILL STRING  
A pressure pulse generating method and apparatus for use with a drill string includes a top and bottom subs for attaching the apparatus within the drill string; a power section comprising a...
US20120118648 Down-the-Hole Hammer Drill  
A down-hole hammer includes a two-piece drill bit retained in a casing having an interior surface with a plurality of longitudinal grooves formed therein. The bit shank and the casing are...
US20120186883 DRILL BIT ASSEMBLY FOR FLUID-OPERATED PERCUSSION DRILL TOOLS  
The present 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...
US20100200301 DOWN HOLE HAMMER HAVING ELEVATED EXHAUST  
A percussive assisted rotary drill includes a top sub for connection with a drill pipe. The drill pipe imparts torque to the drill and also supplies motive fluid to the drill. The drill includes a...
US20100282509 VARIABLE FREQUENCY CONTROL FOR DOWN HOLE DRILL  
A variable frequency down hole drill, includes a drill bit, a reciprocating piston operable to deliver an impact load to the drill bit, and means for changing the frequency with which the piston...
US20110088953 PERCUSSION ASSISTED ROTARY EARTH BIT AND METHOD OF OPERATING THE SAME  
A hammer assembly is actuated to drive an earth bit through a formation. The hammer assembly includes a piston, and a flow control tube which extends through the piston. The flow control tube...
US20100300763 Down-the-Hole Hammer Drill  
There is provided a downhole hammer including a drill bit (2) retained by short (4) and long (5) drive pins in the bore of a driver chuck (1). The chuck (1) and bit (2) shank have machined...
US20130186689 DOWNHOLE TOOL WITH EXTERNAL HOUSING TORQUE TRANSFER  
A downhole tool comprises a first connector sub coupled to an outer housing. A mandrel is disposed in the outer housing and is coupled to a mandrel. The second connector sub is slidably engaged...
US20100307739 Double-Acting Jar  
A double-acting jar is disclosed comprising: an outer housing; an inner mandrel at least partially disposed telescopically within the outer housing to define a fluid chamber between the inner...

Matches 1 - 50 out of 67 1 2 >