HYBRID HYDRAULIC DOWN-THE-HOLE HAMMER

AIR MOTOR ASSEMBLY

DRILLING ASSEMBLY

HYDRAULIC DOWN-THE-HOLE HAMMER AND SUBSEA PILE

PRESSURIZED LIQUID DRIVEN DOWNHOLE DRILLING MACHINE WITH A DEVICE FOR SOFT START FROM A FLUSH POSITION AND IMPACT PISTON MAKING PART OF SUCH A DOWNHOLE DRILLING MACHINE

AIR MOTOR ASSEMBLY

PUMPING ASSEMBLY

DOWN-THE-HOLE DRILL HAMMER HAVING A RIBBED EXHAUST TUBE

DOWN-THE-HOLE DRILL HAMMER HAVING A COAXIAL ACCUMULATOR

AN IMPACT TRANSMISSION MECHANISM FOR A ROTARY PERCUSSION DRILLING TOOL

METHOD FOR CONTROLLING A COMPRESSOR WHICH PROVIDES THE DRIVE OF A PNEUMATIC TOOL

Down-the-hole hammer with adjustable air consumption

DOWN-THE-HOLE HAMMER WITH ADJUSTABLE AIR CONSUMPTION VALVE

RETURN EXHAUST ASSEMBLY FOR A REVERSE CIRCULATION HAMMER

DOWN-THE-HOLE DRILL HAMMER HAVING A PISTON FOLLOWER VALVE

PERCUSSION DRILLING APPARATUS AND METHOD FOR MEASUREMENT WHILE DRILLING

PERCUSSION DRILLING APPARATUS AND METHOD FOR MEASUREMENT WHILE DRILLING

High-frequency composite impactor

Drilling device with fluid column resonator

CENTRE BYPASS MUD HAMMER

Drive device for rotatable operation of a drill bit of a down-the-hole hammer

RECIPROCATING DRIVE APPARATUS

Drill assembly for percussive drilling

REPLACEABLE WEAR COMPONENTS FOR PERCUSSION TOOLS

Hole opener

Hydraulic oscillation tool with variable stage, small pressure drop and strong impact based on radio frequency identification

Spline lubrication for DTH hammers

Well drilling acceleration tool

Drilling tool

Pneumatic drill hammer comprising a boost chamber and a drilling rig comprising such a drill hammer

Liquid hammer drill

Hydraulic down-the-hole hammer and subsea pile

Return exhaust assembly for a reverse circulation hammer

Down the hole drilling assembly and apparatus

Breaking hammer and method of supporting percussion piston

DRILLING ARRANGEMENTS

Multi-function drilling tool

Rock drilling arrangement and machine

Drill bit assembly for percussion drill tools

Tunneling and mining method using pre-conditioned hole pattern

Down the hole drilling assembly exhaust assembly

Down-the-hole hammer drill bit assembly

Rock drill bit for percussive drilling

Drilling rig and methods using multiple types of drilling for installing geothermal systems

Ram accelerator augmented drilling system

Integrated retaining ring and bushing

Multilayer solid lubricant architecture for use in drilling tool applications

Apparatus and method for modifying axial force

Composite shock absorber for polycrystalline diamond compact bit

Arrangement and method for installing casing

Pressurized fluid flow system having multiple work chambers for a DTH hammer and normal circulation hammer thereof

Jarring apparatus

Fluid operated drilling device and a method for drilling a hole using a fluid operated drilling device

Jarring apparatus

Backhead assembly for DTH hammer

Drill bit with detachable bit head

Down the hole drilling machine and method for drilling rock

Method and apparatus for percussion drilling

Down the hole drilling machine and method for drilling rock

Rotary drilling tool and method for producing a bore

Pneumatic drilling with packer slideable along stem drill rod

Well service pump power system and methods

WELL SERVICE PUMP SYSTEMS AND RELATED METHODS

Down-Hole Vibrational Oscillator

Multi fluid drilling system

On-bottom downhole bearing assembly

Drilling wells with air

Flow diversion sub for a down-the-hole drill hammer

Modified surface properties of percussion tools used in downhole drilling

Down-the-hole drill hammer having a roller bearing assembly

Torsion impact speed acceleration device

Steerable Downhole Hammer Bit

Linear and vibrational impact generating combination tool with adjustable eccentric drive

Horizontal directional drilling system

Downhole stroking tool

Apparatus and method for modifying axial force

Method and apparatus for cladding a surface of an article

Carriage for a displacement hammer for positioning the displacement hammer in a launch pit, drilling system with a displacement hammer and a carriage for positioning the displacement hammer in a launch pit and a method for positioning a displacement hammer in a launch pit

Linear and vibrational impact generating combination tool with adjustable eccentric drive

Down the hole hammer and systems and components thereof

Rotary percussive device

Remote control of stroke and frequency of percussion apparatus and methods thereof

Multi-accumulator arrangement for hydraulic percussion mechanism

Quick release down-the-hole hammer drill bit assembly

Down-the-hole hammer drill bit assembly

Drill rod for percussion drill tool

Down-the-hole drill hammer having a roller ramp clutch

Dynamic seal tube for a down hole hammer drill

PERCUSSION HAMMER BIT

Valve of a hydraulically striking device

Mud hammer

Dual circulation drilling system

Ram boring device

Device and system for percussion rock drilling

Valve of a hydraulically striking device

Hydraulically Striking Device

Control valve

Fluid pressure driven, high frequency percussion hammer for drilling in hard formations

Apparatus for drilling and lining a borehole

Downhole drilling assembly with motor powered hammer and method of using same

Drill with integrally formed bent sub and sonde housing

Downhole tool retainer and guide ring

Fluid pulse drilling tool

Impact body for hydraulic impact device

Dual circulation drilling system

Field removable choke for mounting in the piston of a rotary percussion tool

Top mounted choke for percussion tool

Double wall flow tube for percussion tool

Two-port percussion mole

Valve

Pressure control check valve for a down-the-hole drill hammer

AIR SUPPLYING METHOD FOR CLUSTER HAMMER HAVING NOZZLES INSTALLED

Wellbore percussion adapter and tubular connection

Tunable down-hole stimulation system

DRILLING TOOL FOR LAYING A TUBE IN THE GROUND

Pneumatic down-the-hole drill

Piston strike face and bit interface for percussion hammer drill

High frequency fluid driven drill hammer percussion drilling in hard formations

Vibrational tool with rotating engagement surfaces and method

Hydraulic percussion apparatus and method of use

Pressurized fluid flow system having multiple work chambers for a down-the-hole drill hammer and normal and reverse circulation hammers thereof

Drilling motor valve and method of using same

Impact mechanism, rock drill and drill rig comprising such impact mechanism

Annulus ring hole drill

Mud motor with integrated percussion tool and drill bit

Hydraulic/mechanical tight hole jar

Pressurized fluid flow system for a reverse circulation down-the-hole hammer and hammer thereof

Direct drill bit drive for tools on the basis of a heat engine

Method and apparatus for controlling the operation of cluster drill of down-the-hole hammers

Down-the-hole hammer

DOWNHOLE TOOL WITH EXTERNAL HOUSING TORQUE TRANSFER

Downhole tool retainer and guide ring and methods of fabricating the same

Attachment for percussion drill tools

Rock drill bit, a drilling assembly and a method for percussive rock drilling

Air hammer for a boring machine

Drilling apparatus

Horizontal drilling system

Downhole oscillator

Ram boring device

Downhole tool

EXTRA AREA DOWN-HOLE HAMMER APPARATUS AND METHOD

BIT ASSEMBLY FOR A DOWN-THE-HOLE HAMMER DRILL

Down-the-hole hammer drill

METHOD AND SYSTEM FOR DRILLING USING GAS AS A DRILLING FLUID

Downhole mechanism

Drilling apparatus

Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting

Down-the-hole drill hammer having a sliding exhaust check valve

Fluid actuated impact tool with solid piston-standard bit arrangement and water seal

Pressure reversing valve assembly for a down-the-hole percussive drilling apparatus

Down hole hammer having elevated exhaust

Percussion drilling assembly with annular locking member

REVERSE CIRCULATION HAMMER WITH MODULAR BIT

Pressurized fluid flow system for a normal circulation hammer and hammer thereof

METHOD AND DRILLING APPARATUS FOR DOWN-THE-HOLE DRILLING

METHOD FOR ASSEMBLING A DOWN HOLE DRILL

AIR HAMMER OPTIMIZATION USING ACOUSTIC TELEMETRY

Thread retention for an earth boring device

Percussion assisted rotary earth bit and method of operating the same

Methods and apparatus for drilling directional wells by percussion method

Drill bit with a retained jack element

Down-the-hole drill drive coupling

Wellbore percussion adapter and tubular connection

Horizontal drilling system

HORIZONTAL DIRECTIONAL DRILLING SYSTEM

Down-the-hole hammer drill

Procedure and device for the optimal, utilization of carbon resources such as oil fields, oil shales, oil sands, coal, and CO

Variable frequency control for down hole drill and method

Impact Powered Transmitter For Directional Drilling

Drill bit assembly for fluid-operated percussion drill tools

Percussion drilling assembly and locking system therefor

Down hole hammer having elevated exhaust

Fluid distributor cylinder for percussive drills

Down-the-hole drill reverse exhaust system

Percussion hammer bit with a driver sub including a guide sleeve portion

Percussion drilling assembly with annular locking member

Hydro-percussive mechanisms for drilling systems

Air hammer coring apparatus and method

Turbine driven hammer that oscillates at a constant frequency

Down hole multiple piston tools operated by pulse generation tools and methods for drilling

Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly

Percussion drilling assembly having erosion retarding casing

Percussion assisted rotary earth bit and method of operating the same

Excavator apparatus for underground excavation

Percussion drilling assembly and hammer bit with an adjustable choke

Self-indexing down-the-hole drill

Exhaust valve and bit assembly for down-hole percussive drills

Jet hammer

Backhead and drill assembly with backhead

Impact powered transmitter for directional drilling

Flow guide actuation

Flow guide actuation

Methods and apparatus for drilling directional wells by percussion method

Damping and drilling machine including such a damping device

Pressurized fluid flow system for a reverse circulation hammer

Downhole percussive tool with alternating pressure differentials

Downhole percussive tool with alternating pressure differentials

Pulse generator and impulse machine for a cutting tool

Method for manufacturing a drill bit

Percussion hammer for enlarging drilled holes

Downhole turbine

Downhole turbine

Drill bit porting system

Thread retention for an earth boring device

Drill bit

Downhole hammer assembly

Backhead and drill assembly with backhead

Non-rotating drill system and method

Apparatus and method for vibrating a drill bit

Downhole hammer assembly

Downhole hammer assembly

Downhole mechanism

Downhole valve mechanism

Fluid-actuated hammer bit

Air actuated down-the-hole hammer for rock drilling, a drill bit and a foot valve to be used in the down-the-hole hammer

Bit assembly for down-hole drills

Rock drilling equipment

Drill bit with a retained jack element

Inline bladder-type accumulator for downhole applications

Device for channeling solids and fluids within a reverse circulation drill

Downhole steering

Delayed compression sleeve hammer

Water hammer

Ground drilling hammer and the driving method

Drill bit with an electrically isolated transmitter

Jack element with a stop-off

Rotary valve for a jack hammer

Rotary valve for steering a drill string

Drilling apparatus with percussive action cutter

Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer

Combined directional and impact drilling motor

Downhole percussion tool

Downhole hammer drill

Down-the hole hammer

Pneumatic hammer

Method and apparatus for replacement of underground pipe

Percussion tool and method

Compressed air percussive mechanism for a down hole hammer and down hole hammer

Drilling apparatus

Fluid distributor device for down-hole-drills

Method and apparatus for through rotary sub-sea pile-driving

Air motor assembly

Projectile drilling system

Pressurized fluid flow system for percussive mechanisms

Drill string rotation controller for directional drilling

Multilayer solid lubricant architecture for use in drilling tool applications

High speed precision guide device for creating holes for piles or other support members

Pressurized fluid flow system for a DTH hammer and normal circulation hammer thereof

Modular fluid powered linear piston motors with harmonic coupling

High speed precision guide device for creating holes for piles or other support members

Repetitive charge seismology unit

Tunable down-hole stimulation array

Fluid driven drilling motor