| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 175293000 | BELOW-GROUND (1) HAMMER, OR (2) IMPACT MEMBERS | 59 |
| 20080236898 | Rebar insertion tool - An improved ground support member insertion device comprising means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means and adapted for holding a ground support member while it is being inserted into a first drill hole; and, anchoring means disposed opposite the clutch assembly and adapted for temporarily anchoring the device for stabilization in a rock formation during insertion of the ground support member. An impact tool for engaging the proximate end of the ground support member providing rotation and impact to the ground support member to mix the resin and to secure the ground support member in a rock formation. The impact tool can also be used to manually or mechanically tension the ground support member once installed. | 10-02-2008 |
| 20090294180 | 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 within the top sub and the casing. The feed tube assembly includes a non-rigid coupling having a throughbore and a tubular body disposed therein. The tubular body is translatable in the radial position and/or rotatable relative to a longitudinal centerline extending through the non-rigid coupling. | 12-03-2009 |
| 20090321143 | Self-Indexing Down-The-Hole Drill - A down-the-hole drill (DHD) hammer having a casing, a drill bit proximate a distal end of the casing, a piston mounted within the casing and a self-indexing drive transmission is provided. The piston includes a plurality of helical and axial splines. The drive transmission includes a driver sleeve, a driven sleeve and a wrap spring clutch assembly. The driver sleeve and driven sleeve are housed within the casing and circumscribes the piston. The driver sleeve includes a plurality of openings for receiving a plurality of bearings. The driver sleeve bearings are configured to operatively engage the helical splines on the piston. The wrap spring clutch assembly includes a wrap spring circumscribing the driver sleeve and driven sleeve. The driven sleeve operatively engages the drill bit to rotationally index the drill bit. | 12-31-2009 |
| 20100044111 | Percussion Drilling Assembly Having Erosion Retarding Casing - A percussion drilling assembly for drilling through earthen formations and forming a borehole. In some embodiments, the drilling assembly includes a retainer sleeve having an upper end with an outer diameter and a tubular casing engaging the retainer sleeve. The tubular casing includes a first, second, and third tubular portion. The first tubular portion engages the upper end of the retainer sleeve at a first end having an outer diameter substantially equal to the outer diameter of the retainer sleeve. The second tubular portion is connected to the first tubular portion at a first end and has a second end with an outer diameter that differs from the outer diameter of the retainer sleeve. The third tubular portion is coupled to the second tubular portion. The first and third tubular portions each have a length configured to enable gripping of the tubular casing using tongs. | 02-25-2010 |
| 20100187016 | Percussion Hammer Bit With a Driver Sub Including a Guide Sleeve Portion - A percussion drilling assembly for boring into the earth. In an embodiment, the assembly comprises a tubular case having a central axis, an upper end, and a lower end. In addition, the assembly comprises a piston slidingly disposed within the tubular case. Further, the assembly comprises a driver sub coaxially coupled to the lower end of the tubular case. The driver sub includes an upper end disposed within the case and a lower end extending axially from the lower end of the case. Still further, the assembly comprises a hammer bit coaxially disposed within the driver sub. The hammer bit including an upper end disposed within the driver sub and a lower end extending from the lower end of the driver sub. The upper end of the driver sub extends axially from the upper end of the hammer bit and is adapted to receive the piston. | 07-29-2010 |
| 20100252330 | Down-hole Hammer Drill - A down-hole hammer comprising a drill bit ( | 10-07-2010 |
| 20100276204 | VIBRATING TOOL - A vibrating tool comprising a hammer and valve that oscillate axially inside a housing to produce vibrations solely in response to fluid flow through the tool at an operating flow rate. The valve is supported by a spring that resists compression until a minimum operating flow rate is achieved, and hammer is also spring-loaded. When the valve strokes down and engages the hammer, flow through the hammer is restricted. Increased fluid pressure pushes the hammer down away from the valve, resulting in a sudden decrease in pressure, allowing both the hammer and valve to rebound and create vibrational impacts. The cycle repeats continuously as long as an adequate flow rate is maintained. | 11-04-2010 |
| 20110036636 | DOWN-THE-HOLE DRILL DRIVE COUPLING - A down-the-hole drill hammer is provided that includes a housing, a piston mounted within the housing, a drill bit mounted below the housing, and a drive coupling operatively engaged with the housing and drill bit. The drive coupling can be configured with a plurality of lugs circumferentially disposed about the drill bit and coupled with the casing for providing rotation thereof. Alternatively, the drive coupling can be configured with segmented lugs configured to circumscribe the drill bit, or as a cylindrical chuck formed out of arch-shaped chuck segments which radially assemble onto the shank of the drill bit. | 02-17-2011 |
| 20110220421 | ROCK DRILLING MACHINE AND AXIAL BEARING MODULE - A rock drilling machine and an axial bearing module. The rock drilling machine is equipped with an axial bearing having at least one axial piston for axially positioning a drill shank and for damping stress pulses returning from the rock. The axial bearing includes a module that is detachable in one piece from one installation direction. The axial bearing module includes the required pressure medium channels, seals, bearing surfaces, and a module frame having at least bearing housing in connection therewith. | 09-15-2011 |
| 20120073878 | DOWN HOLE APPARATUS FOR GENERATING A PUSLING ACTION - A down hole apparatus for generating a pulsing action includes a tubular housing a rotating first mandrel with a first cam profile and a reciprocating second mandrel with a second cam profile, which engages the first cam profile. Upon rotational movement of the first mandrel, the first cam profile exerts an axial force upon the second cam profile to initiate a pulsing action by forcing the second mandrel away from the first mandrel. Springs bias the second mandrel back toward the first mandrel, thereby completing the pulsing action and maintaining the second cam profile engaged with the first cam profile. | 03-29-2012 |
| 20120085584 | Control System, Rock Drill Rig And Control Method - A hydraulic fluid control system ( | 04-12-2012 |
| 20120152620 | DEVICE AND METHOD FOR PROTECTING THE ROCK DRILLING MACHINE FROM CORROSION - An arrangement intended to be part of a rock drilling machine for percussive drilling. The arrangement includes a casing part with at least one plane end plane. The end plane includes at least a first region and a second region. The first region includes at least a part of the outer contour of the end plane and includes of a material that resists corrosion. | 06-21-2012 |
| 20120285747 | PERCUSSION ROCK DRILLING MACHINE AND DRILL RIG - The present invention relates to a percussion rock drilling machine comprising a front head ( | 11-15-2012 |
| 20130008722 | Down-Hole Hammer Drill - A down-hole hammer comprising a drill bit ( | 01-10-2013 |
| 20130098689 | TWO-PART DRILLING TOOL FOR THE PERCUSSIVE OR ROTARY PERCUSSIVE DRILLING OF HOLES IN SOIL MATERIAL OR ROCK MATERIAL - In a two-part drilling tool for the percussive or rotary percussive drilling of holes in soil material or rock material, including a drill head ( | 04-25-2013 |
| 20140083778 | THREAD DEVICE, THREAD JOINT AND DRILL STRING COMPONENT FOR PERCUSSIVE ROCK DRILLING - A device in a drill string component for percussive rock drilling including a thread for threading together with another drill string component including a complementary thread. The thread includes a thread groove formed by two thread flanks and an intermediate thread bottom. In operation one of the flanks forms a pressure flank. The thread groove has an essentially equally shaped sectional form along its axial extension. The thread bottom exhibits at least three surface portions with part-circular shape, as seen in an axial section. The surface portions with part-circular shape have increasing radiuses, as seen from each thread flank to an intermediate surface portion of the thread bottom. Also a thread joint and a drill string component. | 03-27-2014 |
| 20140158435 | VIBRATOR ARRANGEMENT COMPRISING A CABLE SUSPENSION PENETRATING INTO THE GROUND - A device is provided for vibration compression or for producing cavities and/or material columns in the ground. The device comprises a vibrator with a pipe which has an upper end and a lower end and also two cable suspensions which are arranged on the pipe at a distance from the upper end. A cable is secured to each cable holder. A support device for the vibrator arrangement comprises a guide device on which the cables are guided in the longitudinal direction of the pipe between the cable holders and the upper end or above the upper end. | 06-12-2014 |
| 20140311807 | REVERSE CIRCULATION HAMMER SPLINE ARRANGEMENT IMPROVEMENTS - A down-the-hole hammer drill that delivers fluid to a cutting face has particular application, but not limited, to a reverse-circulation (RC) down-hole face sampling hammer drill is tailored to the design of the cutting face to improve flushing of the cutting face. An associated drill bit and drive sub are also disclosed. | 10-23-2014 |
| 20150330433 | Bolt, And Rock Drill With Bolt - Herein a bolt ( | 11-19-2015 |
| 175295000 | With noncutting portion forwardly of sleeve impact member having a cutting portion (e.g., reamer) | 1 |
| 20140262534 | Rotational Drill Bits and Drilling Apparatuses Including the Same - A subterranean support-bolt drilling assembly has a drill bit rotatable about a central axis and including at least one cutting edge. The drilling assembly also includes a spacer coupled to a rearward end of the drill bit. A reamer member is coupled to a rearward end of the spacer, the reamer member having at least one cutting element, the at least one cutting element having a cutting edge that extends radially beyond an outer peripheral portion of the drill bit relative to the central axis. A subterranean support-bolt drill bit includes a bit body and at least one cutting element coupled to the bit body. The support-bolt drill bit has a central pilot extending from the bit body in an axially forward direction. The cutting edge of the at least one cutting element extends radially beyond the central pilot relative to a central axis of the drill bit. | 09-18-2014 |
| 175296000 | Fluid-operated | 36 |
| 20080257609 | Pneumatically Reversible Ram Boring Device - A pneumatically reversible ram boring device includes a percussion piston ( | 10-23-2008 |
| 20090188723 | 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 ( | 07-30-2009 |
| 20090194336 | 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 a first damping piston ( | 08-06-2009 |
| 20090260889 | Backhead and drill assembly with backhead - In representative embodiments, a backhead for a drill assembly comprises an elongate member having a proximal end connectible to a source of pressurized fluid, a side wall defining an axial bore and an open distal end. A portion of the bore extending proximally from the distal end has an inner surface defining a cylinder portion shaped to receive an axially movable piston. The axial bore also comprises a check valve receiving area shaped to receive a check valve and to separate, during normal operation when a check valve is received in the check valve receiving area, an inlet area extending proximally to the proximal end from the cylinder portion extending distally to the distal end. Various improvements in retaining the distributor and increasing flow efficiency are described. | 10-22-2009 |
| 20090277690 | 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 inner diameter of the barrel assembly forms a restricted barrel segment. The restriction intermediate an upper chamber and a lower chamber. A metering system comprising an upper flange a meter valve, and a lower flange. The meter valve slideably disposed on the sliding assembly between the upper and lower flanges. The metering system travels between the upper chamber and the lower chamber providing limited, controlled flow of the fluid contained therein when passing through the restriction in order to pressurize the system and produce a jarring stroke. Alternatively, the metering system comprises an upper flange, a meter ring, a meter valve, and a lower flange. The meter valve and meter ring are slideably disposed on the sliding assembly intermediate the upper and lower flanges. | 11-12-2009 |
| 20100059284 | 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 configured to exhaust working fluid volumes about a proximal end of the DHD hammer. The backhead includes a check valve assembly having a plug seal that can be moved to a closed seal position by gravity. A DHD hammer having a segmented chuck assembly is also provided. The segmented chuck assembly includes a plurality of chuck segments forming a cylindrical chuck assembly. | 03-11-2010 |
| 20100108395 | 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 ( | 05-06-2010 |
| 20100187017 | 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 exhaust ports. Working air volumes from the drive chamber are exhausted through the backhead while working air volumes from the drive chamber are exhausted primarily through a drill bit. | 07-29-2010 |
| 20100200301 | 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 shank adapter to facilitate affixing a rotary drill bit to the drill. The motive fluid is divided between a bit flow which flows through the bit to clear debris at the bottom of the drill, and an actuator flow. An actuator, which may be in the form of a reciprocating piston, moves within the drill under the influence of the actuator flow to impart cyclical blows to the shank adapter. The blows are transferred to the drill bit through the shank adapter to provide a relatively high frequency low amplitude percussive force on the rotating drill bit to assist in the drilling operation. At least a portion of the actuator flow portion of the motive fluid is exhausted through the top end of the drill. The relative flow rates and volumes of the bit and actuator flows can be adjusted with a check valve in the actuator flow exhaust path. | 08-12-2010 |
| 20100236832 | 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 threaded along its length. A reciprocating chuck is provided as a sleeve with internal screw thread as corresponding to those of the shank. The shank is releasably secured in the chuck with the read end of the shank providing a striking face. An arrangement of external splines on the chuck, and a retaining shoulder at its rear end, provide for the required guided movement of the chuck within a drill hammer wear sleeve. | 09-23-2010 |
| 20100300763 | Down-the-Hole Hammer Drill - There is provided a downhole hammer including a drill bit ( | 12-02-2010 |
| 20110088953 | 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 includes drive and return guide ports. The piston is repeatably moveable relative to the drive and return guide ports in response to a fluid flow through the flow control tube. In this way, the hammer assembly is actuated. | 04-21-2011 |
| 20110192650 | 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 within the top sub and the casing. The feed tube assembly includes a non-rigid coupling having a throughbore and a tubular body disposed therein. The tubular body is translatable in the radial position and/or rotatable relative to a longitudinal centerline extending through the non-rigid coupling. | 08-11-2011 |
| 20110209919 | 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 pressure of the pressurized fluid contained inside of a front chamber and a rear chamber located at opposites sides of the piston, wherein the flow into and out of these chambers is controlled solely by the overlap or relative position of the piston and the cylinder as a supply chamber and a discharge chamber defined by recesses on the inner surface of the outer casing and separated by a dividing wall control the flow of pressurized fluid in and out of the front and rear chambers the. A down-the-hole normal circulation hammer with this system comprises a drill bit with one or more flushing passages that extend from channels cooperatively formed between splines on the inner surface of the driver sub and splines on the outer surface of the drill bit shank, to the front face of the drill bit for discharging the pressurized fluid out of the hammer. | 09-01-2011 |
| 20110266067 | 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 shank adapter to facilitate affixing a rotary drill bit to the drill. The motive fluid is divided between a bit flow which flows through the bit to clear debris at the bottom of the drill, and an actuator flow. An actuator, which may be in the form of a reciprocating piston, moves within the drill under the influence of the actuator flow to impart cyclical blows to the shank adapter. The blows are transferred to the drill bit through the shank adapter to provide a relatively high frequency low amplitude percussive force on the rotating drill bit to assist in the drilling operation. At least a portion of the actuator flow portion of the motive fluid is exhausted through the top end of the drill. The relative flow rates and volumes of the bit and actuator flows can be adjusted with a check valve in the actuator flow exhaust path. | 11-03-2011 |
| 20110297447 | 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 first valve pressure surface engages an internal surface of a housing of the DHD hammer. The second valve pressure surface is in communication with a high pressure port of the DHD hammer. The third valve pressure surface is in communication with a passageway that extends through a distributor within the DHD hammer. The valve also includes a valve passageway that extends through the valve and which is in communication with a first volume of the DHD hammer. The first volume is formed by surfaces of the distributor and the third valve pressure surface. | 12-08-2011 |
| 20110303464 | 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 bore is fixedly disposed within the casing. A piston is located in the chamber and a second end thereof is configured to selectively enter the bore of the bearing through the first end to impact the first end of the drill bit. At least one groove is formed in an exterior surface of the piston proximate the second end thereof. The tool has a sealed position when the drill bit is in the extended position wherein a water seal is formed between an interior surface of the bearing and a portion of the exterior surface of the piston between the first end of the piston and the first end of the at least one groove. | 12-15-2011 |
| 20120006598 | 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. The exhaust port communicates between an interior of the backhead and an exterior of the backhead. The tubular sliding check valve assembly includes a distributor, a sliding valve, and a biasing member. The distributor has a central opening extending through the distributor, an aperture extending through the distributor, and an exhaust gallery. The sliding valve is slidable along the central opening. The biasing member biases the sliding valve to a closed position. | 01-12-2012 |
| 20120118648 | 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 rotationally connected by a number of pins received in the grooves. A symmetrical free piston divides the casing into an upper working chamber and a lower working chamber. The piston slides on an air control assembly including a ported tube extending axially from said air supply to an axial bore in the shank of the bit to guide exhaust air through discharge ports at the cutting face of the bit, the bit reciprocating on the end of the tube. The upper and lower check valves in the air control assembly and openable by supply pressure against a spring bias in response to working fluid supply pressure. | 05-17-2012 |
| 20120186883 | 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 ( | 07-26-2012 |
| 20120247839 | 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; at least one drill rod having a first connection valve for connection of the drill rod to the connection valve of the hammer; and a second connection valve for connection of the drill rod to the first connection valve of a like drill rod or to a rotation device. The piston and shuttle valve are positioned substantially in-line to the axis of movement of the hammer. The accumulator is positioned proximate to the shuttle valve; and the first connection valve, and second connection valve having at least one poppet valve positioned proximate to a corresponding valve seat. | 10-04-2012 |
| 20130068533 | 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 to the upper sub housing and demarcates an inner zone including an internal mechanism of the extensible joint, and an outer zone open to well bore fluids and pressure. A fluid barrier moves within the pressure equalization chamber in response to changes in well bore pressure to alter a volume of the inner zone to equalize a pressure of the inner zone. | 03-21-2013 |
| 20130133952 | ATTACHMENT FOR PERCUSSION DRILL TOOLS - The present invention provides an attachment ( | 05-30-2013 |
| 20130186692 | DOWN-THE-HOLE HAMMER - The present invention relates to a down-the-hole hammer comprising an external cylindrical outer wear sleeve ( | 07-25-2013 |
| 20130206481 | 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 for sourcing compressed air or pressurized fluid from independent supply sources and distributing to the DTH percussion hammers; wherein the DTH percussion hammers are arranged such that one or more circumferential layers of drill bits are formed covering the drilling area; and wherein within each circumferential layer, at least one DTH percussion hammer is supplied with the compressed air or pressurized fluid from an independent supply source that is different from the independent supply source supplying the other DTH percussion hammers. | 08-15-2013 |
| 20130233626 | 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 casing and the piston of the hammer and in between the piston and the sample tube. Two chambers help to respectively supply and discharge pressurized fluid into and out of the front and rear chambers that exert work on the piston: an internal chamber, defined by a central recess in the inner surfaces of the piston and permanently connected to the source of pressurized fluid, and a discharge chamber, defined by one or more recesses in the inner surface of the outer casing and permanently communicated with the bottom of the hole. A hammer provided with this system has one or more end discharge ports connected to respective longitudinal discharge channels formed on the outer surface of the outer casing. | 09-12-2013 |
| 20140076638 | 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 located at opposite ends of the piston, the auxiliary chambers each formed around respective waists on the piston and externally delimited by respective cylinders which are arranged longitudinally in series. Two or more internal chambers filled with the pressurized fluid are defined by recesses in the inner surfaces of the piston for supplying said fluid to the work chambers, controlled in a cooperative way by the piston and a control tube coaxially arranged within a central bore of the piston. One or more discharge chambers are formed in between the outer casing and the cylinders for emptying the work chambers through discharge ports in the cylinders. Reverse and normal circulation drill hammers are provided having this system. | 03-20-2014 |
| 20150129315 | 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 in the outer wall. The upper portion extends from a top end towards a bottom end. The lower portion extends from the upper portion to the bottom end. The inner wall extends from the top end to the bottom end and defines a central channel therein. The outer wall extends from the top end towards the bottom end, surrounds a portion of the inner wall and defines an outer channel with the inner wall. The opening is fluidly communicable with a first conduit formed within a piston, which surrounds a portion of the flow tube, when in an up position and is fluidly communicable with a second conduit formed within the piston when in a down position. | 05-14-2015 |
| 20150129316 | 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 and outer walls and at least one opening formed in the outer wall. The inner wall extends from a top end of the flow tube to a bottom end of the flow tube and defines a central channel therein. The outer wall extends from the top end towards the bottom end, surrounds a portion of the inner wall, and defines an outer channel with the inner wall. The choke is positioned at the top end over the central channel and regulate a fluid flow therethrough. A check valve is positioned in fluid communication with the choke. | 05-14-2015 |
| 20150129317 | 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 choke body for fluid to flow therethrough. The choke further includes one or more arm slots formed into the choke body between an inner wall of the choke body and an outer wall of the choke body. The one or more arm slots are designed to receive one or more arms of a choke change tool. The choke adapter has an adapter opening extending through the choke adapter. The choke is sized to fit in the adapter opening. The choke is removable from the choke adapter after the choke is inserted into the adapter opening. | 05-14-2015 |
| 20150345227 | 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 members about its working face. The non-concentric or spiral arrangement of the cutting members in the drill bit and their overlapping cutting paths during rotation of the drill bit reduces the presence of concentric grooves or valleys being cut into the earthen terrain impacted by the bit thereby resulting in more complete cutting coverage. | 12-03-2015 |
| 20160053541 | 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 reciprocate between a first and a second position in the cylinder. According to the invention, a first control channel and a second control channel extend from the valve, a first port and a second port open into the cylinder, wherein the first port is coupled to the first control channel and the second port is coupled to the second control channel, the piston having at least one flow space which is arranged to be selectively coupled to the first port and to the second port and allowing the hydraulic fluid to flow in one of the control channels in one direction so as to provide circulation of the hydraulic fluid controlling the valve. | 02-25-2016 |
| 20160069135 | 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 operation in order to create oblique or horizontal bores in the ground, in which the piston chamber of a rotary piston drive is connected to a control fluid line. | 03-10-2016 |
| 20160153237 | DYNAMIC SEAL TUBE FOR A DOWN HOLE HAMMER DRILL | 06-02-2016 |
| 175297000 | Restricted orifice for initially delaying escape of restraining fluid | 2 |
| 20090308661 | Exhaust valve and bit assembly for down-hole percussive drills - A bit assembly is for a percussive drill that includes a casing with an interior chamber and includes a bit connectable with the casing and having a longitudinal bore and an axis through the bore. The bore has a retainer portion with one or more generally. conical inner surfaces extending circumferentially about and facing generally toward the axis. A generally cylindrical valve has a longitudinal passage with an inlet fluidly connectable with the casing chamber and an outlet fluidly connectable with the bit central bore and an axis through the passage. An engagement portion with at least one generally conical outer surface extends circumferentially about and faces generally away from the valve axis. The valve engagement portion is disposable within the bit bore retainer portion such that the valve conical outer surface is disposed within and against the bit conical inner surface to retain the valve coupled with the bit. | 12-17-2009 |
| 20130248253 | HYDRAULIC JAR WITH MULTIPLE HIGH PRESSURE CHAMBERS - A hydraulic jar having multiple high pressure chambers includes a jar body comprising an inner body telescopically engaged by an outer body. There is a first contact surface carried by the inner body, and a second contact surface carried by the outer body that engage when the jar body is moved to the jarring position. A plurality of axially spaced pressure chambers are spaced axially along the jar body, with each pressure chamber having a hydraulic delay section and a jarring section. A piston separates the pressure chamber. A hydraulic delay is in fluid communication with a high pressure section and a low pressure section of each pressure chamber and permits movement of the piston toward the second end at a first speed. A jarring valve permits movement of the piston toward the second end at a second speed that is greater than the first speed when in a japing section. | 09-26-2013 |
| 175298000 | Continuous unidirectional rotary motion of one telescoping member effects consecutive impacts | 1 |
| 20110253456 | REVERSE CIRCULATION HAMMER WITH MODULAR BIT - Embodiments provide apparatuses and methods for excavation and drilling, particularly reverse circulation hammers and bits. Reverse circulation hammers and bits manufactured in accordance with various embodiments may help to prevent fatigue and breaking of the bit during a drilling operation, may prevent clogging of return holes, may provide higher efficiency drilling operations, and may provide modular bit designs that may be interchanged to suit a particular drilling operation. | 10-20-2011 |
| 175300000 | With releasable means to detachably retain telescoping members against axial reciprocation | 1 |
| 20130319772 | HAMMER BIT LOCKING MECHANISM - A hammer bit retainer system includes a hammer bit locking mechanism arranged and designed to prevent decoupling of a driver sub from a hammer casing. The hammer bit locking mechanism includes an expandable split ring which is disposed in the coupling between the driver sub and hammer casing. The hammer bit locking mechanism prevents axial movement of the driver sub relative to the hammer casing in at least one direction. | 12-05-2013 |
| 175305000 | Telescoping members relatively rotatable | 1 |
| 20150330151 | APPARATUS FOR DRILLING AND LINING A BOREHOLE - An arrangement at a drill includes a drill bit intended to be inserted at its neck into a chuck in a down-the-hole drill, a control means for guiding the drill and a lining pipe, a coupling arrangement in the form of a bayonet coupling or similar with which the drill can be coupled to the control means in a manner that allows them to be separated and that in its freed condition allows the drill, together with the down-the-hole drill, to be withdrawn through the lining pipe, a flushing passage for the supply of flushing agent in front of the drill and an evacuation passage for the removal of drilling cuttings together the flushing agent. It also includes a casing shoe that can be applied at the forward end of the lining pipe and a contact surface arranged at a stationary part of the down-the-hole drill. | 11-19-2015 |
