Abstract: A compact rotary surface jack with a driven rotary hanger flange on an upper travelling plate of the jack is provided by the invention; the jack is preferably a horseshoe jack. Capabilities to work on the well such as rotating and reciprocating while cementing casing in place in the well, or setting or unsetting in-hole devices such as packers, anchors and bridge plugs (etc.) by providing low speed (1-6 rpm) rotational force and short (1-6 feet) linear vertical forces to tubulars in a well to which the device is attached, are enabled.

Abstract: A telescopic mast includes at least one first structure including a fixing portion adapted to be fixed to a drill floor. At least one second structure is mobile relative to the first structure, to obtain a telescopic mast. A moving system is adapted to extend and retract a longitudinal extension of the telescopic mast, by moving the second structure. The moving system includes at least one first actuator device, adapted to be fixed to the first structure or to the drill floor at its first end. The second structure is fixed at a first end of at least one second actuator device. At least one supply chamber is adapted to supply at least the first actuator device and at least the second actuator. At least one first actuator device and the at least one second actuator device are aligned along a single direction and operate with opposite directions.

Abstract: There is provided an excavation assembly for use in an excavator, wherein the excavation assembly is removably coupled to an arm at a pair of spaced shaft-receiving portions defined therein, wherein the excavation assembly performs an excavation operation into a ground or a rock, wherein the excavation assembly comprises: a body removably coupled at one end thereof to the pair of spaced shaft-receiving portions; a driving mechanism configured to generate at least one of a linear driving force, a rotational driving force, and a striking force; an excavation tool coupled to the driving mechanism and configured to be driven by at least one of the linear driving force, the rotational driving force, and the striking force transmitted from the driving mechanism, thereby to perform the excavating operation, wherein a direction of the excavation operation by the excavation tool varies depending on coupling positions between the pair of spaced shaft-receiving portions and the body.

Abstract: A system includes a utility chassis for use with rock drills for automatic and safe drilling of target surfaces. The utility chassis has a lightweight vertical frame member with an overall center of gravity that allows for manual lift handles to be arrayed about the center of gravity for easy loading and unloading onto transportation vehicles without the need for separate heavy machinery. The utility chassis incorporates a spring-centered closed position valve for drill rotation and a three-way spring-centered retract with two open feed positions valve for increased safety. A hinged drill rod guide cap is incorporated into the drill rod guide for quick removal of the chassis from lodged or broken drill rods. The chassis is lighter, more ergonomic, and safer than prior art chasses.

Abstract: A hydraulic draw-works comprises several hydraulic cylinders of mixed orientation, such that some hydraulic cylinders actuate upwards and some hydraulic cylinders actuate downwards. These cylinders are connected by a plurality of braces mounted along a guide rail, and the drill head is mounted on a carriage along the guide rail and actuated by the upwards-oriented cylinders. The use of mixed orientation cylinders allows the effective vertical stroke length required to raise and lower the drill head to be halved. In a preferred embodiment, through-rod porting of the downwards-oriented cylinders supplies hydraulic fluid to the remainder through a manifold, and digitally controlled directional valves allow precise control of the drill head.

Abstract: Systems and methods integrate disparate backup devices with a unified interface. In certain examples, a management console manages data from various backup devices, while retaining such data in its native format. The management console can display a hierarchical view of the client devices and/or their data and can further provide utilities for processing the various data formats. A data structure including fields for storing both metadata common to the client device data and value-added metadata can be used to mine or process the data of the disparate client devices. The unified single platform and interface reduces the need for multiple data management products and/or customized data utilities for each individual client device and provides a single pane of glass view into data management operations. Integrating the various types of storage formats and media allows a user to retain existing storage infrastructures and further facilitates scaling to meet long-term management needs.

Abstract: Reusable cartridges allow the time consuming resin preparation and processing steps to occur offline and not affect the cycling time of the injector. Cartridges also greatly simplify the operation of RTM injectors as preparation simply consists of loading a warmed ready-to-use resin cartridge and performing the injection.

Abstract: A pneumatically powered pole saw is provided, the pole saw having gas actuated main valves configured for movement between first positions and second positions wherein the gas actuated main valves are located in a main valves assembly fluidly coupled to the piston chamber; and a first pilot valve is configured to send actuating gas through a conduit to the main valves assembly and a second pilot valve is configured to send actuating gas through a conduit to the main valves assembly wherein the cutting blade moves in opposite directions in response to the actuating gas of the first and second pilot valves.

Abstract: A portable modular horizontal earth boring machine includes three main components: a digging mechanism, a discharge mechanism and a driving mechanism. The digging mechanism includes an auger and a rigid sleeve positioned around the auger. The driving mechanism and the discharge mechanism are positioned within an outer housing. The driving mechanism spins the drive shaft and the auger, and the discharge mechanism includes discharge paddles that rotate, causing dirt and debris that is generated during a boring operation to be expelled from the discharge mechanism through a discharge port. The auger and sleeve are removably connected to the machine, so that it may be disassembled for transport and storage.

Abstract: A pneumatic valve assembly with a trigger for switching the pneumatic valve assembly between two or more valve operation modes is disclosed herein. The valve operational modes are determined by selection of fluid conduits by a trigger valve assembly of the pneumatic valve assembly which interconnects fluid conduits to a main valve, pilot valves and a pneumatic cylinder of a fluid powered pole saw and wherein a piston located in the pneumatic cylinder is mechanically coupled to a cutting blade of the pole saw and the trigger is operatively coupled to the trigger valve assembly, wherein the pneumatic valve assembly is axially aligned with pneumatic cylinder.

Abstract: A rock drilling and bolting system includes a frame, a drill feed rail rotationally supported on the frame, the drill feed rail having a drill feed slidable on the drill feed rail and a bolter feed rail rotationally supported on the frame, the bolter feed rail having a bolter feed slidable on the bolter feed rail. The system further includes a rotary mechanism comprising a first pivot arm and a parallel second pivot arm that rotationally couples the bolter feed rail to the drill feed rail and an actuator mounted to the frame and the rotary mechanism for simultaneously rotating the drill feed rail and the bolter feed rail between a drilling position for drilling and a bolting position for bolting.

Abstract: A pneumatic valve assembly with a trigger for switching the pneumatic valve assembly between two or more valve operation modes is disclosed herein. The valve operational modes are determined by selection of fluid conduits by a trigger valve assembly of the pneumatic valve assembly which interconnects fluid conduits to a main valve, pilot valves and a pneumatic cylinder of a fluid powered pole saw and wherein a piston located in the pneumatic cylinder is mechanically coupled to a cutting blade of the pole saw and the trigger is operatively coupled to the trigger valve assembly.

Abstract: The invention relates to a drilling unit with a carrier vehicle with a hydraulic supply, a mast, a carriage which can be moved along the mast and a hydraulic cylinder for moving the carriage which comprises a cylinder housing, in which a piston with a piston rod is mounted so that it can be displaced. The piston rod is fixed to the mast and the cylinder housing to the carriage. The carriage is connected to the hydraulic supply and comprises at least one hydraulic connection. The hydraulic cylinder is connected via the hydraulic connection on the carriage to the hydraulic supply.

Abstract: A pneumatically powered pole saw is provided, the pole saw having gas actuated main valves configured for movement between first positions and second positions wherein the gas actuated main valves are located in a main valves assembly fluidly coupled to the piston chamber; and a first pilot valve is configured to send actuating gas through a conduit to the main valves assembly and a second pilot valve is configured to send actuating gas through a conduit to the main valves assembly wherein the cutting blade moves in opposite directions in response to the actuating gas of the first and second pilot valves.

Abstract: A dust collection tube arrangement is provided. The tube arrangement includes an outer tube and an inner tube. The outer tube and the inner tube have a hollow configuration. The inner tube has a diameter lesser than that of the outer tube. The inner tube moves fore and aft with respect to the outer tube. The outer and inner tubes provide a passage for dust and airflow along with adjustable length of tube arrangement based on a position of the inner tube with respect to the outer tube.

Abstract: A pneumatic valve assembly with a trigger for switching the pneumatic valve assembly between two or more valve operation modes is disclosed herein. The valve operational modes are determined by selection of fluid conduits by a trigger valve assembly of the pneumatic valve assembly which interconnects fluid conduits to a main valve, pilot valves and a pneumatic cylinder of a fluid powered pole saw and wherein a piston located in the pneumatic cylinder is mechanically coupled to a cutting blade of the pole saw and the trigger is operatively coupled to the trigger valve assembly.

Abstract: Provided is a machine tool which is equipped with a floating mechanism, and the whole of which can be miniaturized and lightened, the floating mechanism being equipped with carriers of loads generated in both radial and thrust directions, resulting in deformation of the floating mechanism being reduced. The floating section (4) of the machine tool is provided with a hollow circular-plate-shaped inner ring (9) comprising an outer peripheral surface section (9a), an upper surface section (9b), and a bottom surface section (9c); and an outer ring (8) comprising an inner peripheral section (8a) and an inner ring receiving section (8b). The outer ring (8) is fixed to a robot arm. The inner ring (9) is fixed to a tool driving section. The outer peripheral surface of the inner ring (9) is formed by a spherical surface which is equidistant from the center point (14) of a hollow circular plate.

Abstract: The present disclosure provides improved swimming pool cleaner drive mechanisms and associated methods. More particularly, the present disclosure provides an improved pool cleaner drive mechanism that includes a motor that powers the: (i) wheel(s) and (ii) drive member of the pool cleaner. A pool cleaner having a housing, a drive mechanism, one or more wheels, and a drive member is provided. The drive mechanism includes a gear drive and a motor associated with the housing. The motor powers the one or more wheels to move in a forward direction or a reverse direction and provides steering of the wheels. The motor also powers the drive member (e.g., a rotating drive member such as a propeller, impeller, fan, rotor, suction fan) into an ON and OFF position/state to propel the swimming pool cleaner. Embodiments are also directed to systems/methods of driving a swimming pool cleaner.

Abstract: A micro assembly having a substrate and an operating plane coupled to the substrate. The operating plane is movable from an in-plane position to an out-of-plane position. One or more electric connections provide electric power from the substrate to the operating plane in the out-of-plane position. A tool is coupled to the operating plane. The tool is operable to receive electric power from the operating plane to perform work.

Abstract: A feeder holding device used with a rock drilling and/or rock bolting rig, in which the rock drilling and/or rock bolting rig has at least one boom with a first end and a second end, the first end is attached to a carrier, and the second end supports a feed beam by the feeder holding device, and in which the feed beam can be adjusted by the feeder holding device in a first drilling position in a first drilling direction and in a second position. The feeder holding device provides linear movement of the feed beam, in a direction different from the drilling direction, from the first drilling position to the second position, such that the feed beam in the second position is pointed in a direction parallel to the first drilling direction. A rock drilling and/or rock bolting rig is also provided.

Abstract: An apparatus for machining a workpiece with a tool has a columnar housing having an upright front face and a pair of upright and parallel side walls extending horizontally rearward from the front face, a carriage movable at least vertically on the front face carries a first holder for the workpiece or the tool. A U-shaped frame juxtaposed with the housing front face has two rigid arms each extending rearward adjacent the housing side walls with interfitting guides between each of the arms and the respective side wall enabling horizontal movement of the frame toward and away from the front face. A second holder on the frame and in front of the front wall holds the tool or the workpiece and is engageable with the workpiece or the tool, respectively, in the first holder.

Abstract: A robot for machining a part of structure under water, comprising a machine tool having a chamber receiving a machining element, a support and guiding structure of the machine tool fixable with respect to the part to be machined and having submersible mobile elements and corresponding submersible guiding elements defining axes along which the mobile elements are movable to position the machine tool with respect to the part to be machined, displacement units for displacement of the mobile elements along the axes, a gas supply connecting to the machine tool to inject gas in the chamber, and a programmable control unit for operating the displacement units and the machine tool based on a closed-loop control mode in order to achieve the machining of the part.

Abstract: A track guiding system includes a track comprising a linear beam and a linear plate operatively coupled to the linear beam. The linear plate has opposing first and second surfaces separated by a first distance and opposing first and second edges separated by a second distance. A first compound edge roller and a second compound edge roller are disposed adjacent to the first and second edges of the linear plate, respectively, for travel along the first and second edges of the linear plate. Each of the first and second compound edge rollers include a first roller element adjacent to the first surface of the linear plate and a second roller element adjacent to the second surface of the linear plate. A carriage is coupled to the first and second compound edge rollers.

Abstract: A counterforce mechanism is arranged to exert a force on an object to maintain the object at a desired position. The mechanism comprises a driven body, a drive for moving the driven body, and a resilient coupling arrangement for coupling the driven body to a portion of an object. A control arrangement is arranged to output a drive signal to the driven body drive to move the driven body to a location where it exerts a force on the object via the coupling arrangement, such that the force counteracts an opposing force acting on the object and the mechanism holds the portion of the object at the desired position. A machine axis and a machine tool incorporating such a counterforce mechanism are also described, together with methods of operation thereof.

Abstract: A micro assembly having a substrate and an operating plane coupled to the substrate. The operating plane is movable from an in-plane position to an out-of-plane position. One or more electric connections provide electric power from the substrate to the operating plane in the out-of-plane position. A tool is coupled to the operating plane. The tool is operable to receive electric power from the operating plane to perform work.

Abstract: A drilling assembly for drilling pipe into a drilling surface using a drill bit. The drilling assembly comprises a power unit, a thrust frame, a means for moving the thrust frame, a rotary and carriage assembly and a microprocessor adapted to control the load on the drill based upon the level of mud pressure in the assembly. The drilling assembly is adapted to drill pipe at any angle relative to the drilling surface between substantially parallel to the drilling surface and substantially perpendicular to the drilling surface. The method comprises providing a such drilling assembly, placing a drill pipe onto the drilling assembly, moving the thrust frame to a desired drilling angle, moving the rotary and carriage assembly into direct contact with the drill pipe, applying rotational, thrust and pull-back forces to the drill pipe, drilling the pipe into the drilling surface and controlling the load on the drill bit.

Abstract: The invention relates to a drilling implement with a derrick, a drill drive for driving a drill rod guided on the derrick and a gear, which is placed between the drill drive and drill rod for transmission purposes. According to the invention, for inverting the gear ratio, the gear is placed in disengageable and reversible manner on the drill drive.

Abstract: The object of the invention is to provide a drilling device which is compact and has good sliding properties. The object is achieved by an upper beam for use with a lower beam in a telescopic feeder for a drilling device for rock drilling. The upper beam extends along a longitudinal axis and has a generally U-shaped cross section comprising a bottom wall and a first and a second side wall. Each side wall has an inward surface and an outward surface. The upper beam comprises a cooperating member intended for sliding cooperation with the lower beam. The cooperating member comprises an attachment structure extending outwardly from each outward surface of each side wall. Each attachment structure is intended for fixed mounting of a crank block bracket, which crank block bracket faces the outward surface of each side wall.

Abstract: In a device for guiding and tensioning supply lines for working tools movable along a straight guide, e.g. supply lines of a hydraulic hammer drill on an advance mounting, the advance of the working tool is implemented by means of a revolving transport chain driven by a sprocket wheel, and the supply line(s) are guided between the connections on the fixed guide and the connections on the working tool by a tension roller which causes a deflection about 180° and is movable in advance direction downstream the working tool conjointly therewith in the same direction but at half the advance speed, wherein the tension roller is slidably guided on the guide for the working tool transversely to its rotation axis, and wherein a pinion engages the transport chain for driving the movement of the tension roller and interacts with a fixed chain on the opposite side.

Abstract: A telescopic feed beam for a rock drill includes a lower beam and an upper beam arranged to move with respect to each other in the longitudinal direction. The cross section of the lower beam is such that there is a groove-like open space at the bottom of the lower beam and a transfer cylinder between the lower beam and the upper beam is mounted in the groove.

Abstract: A micro assembly having a substrate and an operating plane coupled to the substrate. The operating plane is movable from an in-plane position to an out-of-plane position. One or more electric connections provide electric power from the substrate to the operating plane in the out-of-plane position. A tool is coupled to the operating plane. The tool is operable to receive electric power from the operating plane to perform work.

Abstract: A drill slide (1) for a drilling apparatus, the slide (1) adapted to slidably support a drifter (6), the slide (1) comprising a telescopic shaft (2) having a first elongate member (3) telescopically slidable with respect to a second elongate hollow member (4); a first rail mounted to or integral with the second elongate hollow member (4) upon which the drifter (6) travels along; and wherein a second removable rail (7) is adapted to be fitted adjacent to the first elongate member (3) in an extended configuration, where the second rail (7) is end to end with the first rail (5) thereby allowing the drifter (6) to slide along the first (5) and second rails (7).

Abstract: When a slide member mounted with a tool reciprocates on a guide member reach one end and the other end positions of the guide member, permanent magnets provided on the guide member and the permanent magnets provided on the slide member repel each other to give the guide member forces for reversing its moving direction. The guide member is provided to be movable with respect to a base and repulsive forces between permanent magnets provided on the base and permanent magnets provided on the guide member are used to retain an axial position of the guide member.

Abstract: A device which includes an elongate body with a movable mass arranged for sliding movement within the body is disclosed. The element is arranged to decelerate toward an end of the body in order to impart forward movement thereto, via momentum transfer, and is further arranged to accelerate away from said end in order to further drive the body forward, again using momentum transfer.

Abstract: A rotary-linear system is configured to operate an associated tool. The system includes a rotary-linear actuator having first and second portions that can move linearly and/or rotationally relative to each other, such as about a central axis extending through the actuator. An elongated drive rod extends axially through at least a portion of the actuator, which is operative to rotate about a longitudinal axis thereof generally independently of the actuator. While the rotation of the drive rod can be independent of movement of the actuator, such rotation can be controlled based on the position and/or movement of the actuator. An end of the drive rod near a distal end of the actuator is operative to actuate an associated tool, such as can be mounted at a distal end of the actuator.

Abstract: A hydraulic fluid tank for a drilling machine includes a primary chamber and a secondary chamber. The primary chamber is located entirely below the hydraulic pump of the drilling machine, and the secondary chamber is located above and in fluid communication with the primary chamber. The secondary chamber is adapted to maintain a hydraulic fluid level that is above the pump suction centerline of the drilling machine pump as the hydraulic fluid in the tank reaches its normal operating temperature during operation of the drilling machine. The secondary chamber is also sized and configured to allow for thermal expansion of hydraulic fluid in the amount of at least about 5% of the total tank volume as the hydraulic fluid in the tank reaches its normal operating temperature during operation of the drilling machine.

Abstract: A device (1) which includes an elongate body (2) with a movable mass (3) arranged for sliding movement within the body (2), the element (4) being arranged to decelerate toward an end of the body (2) in order to impart forward movement thereto, via momentum transfer, and being arranged to accelerate away from said end in order to further drive the body (2) forward, again using momentum transfer.

Abstract: A drive system for wellbore operations, the drive system, in certain, but not necessarily all aspects, including a main body, a motor apparatus, a main shaft extending from the main body and rotatable by the motor, the main shaft having a top end and a bottom end, and an item, the item non-threadedly connected to the main shaft.

Abstract: A pile driver including an apparatus for allowing relative movement between a hammer and a boom of an excavator. The apparatus includes a mounting plate mounted to the boom that interfits with and is slidable with respect to a frame rail mounted to the hammer. In operation, the hammer is placed on top of a pile and, as the pile is driven downwardly, the hammer follows the pile. Owing to the relative movement between the boom of the excavator and the hammer, the hammer follows the pile without requiring continuous downward readjustment of the boom. In one embodiment, the mounting plate assembly does not extend substantially above the hammer frame. In another embodiment, the hammer can rotate with respect to the boom. In one embodiment, the hammer includes a ram, a cylinder for lifting the ram, and rotation-resistant cable connecting the ram and the cylinder.

Abstract: A rock drilling machine (1) having, on a machine housing (2), a first attachment element on a first attachment side (13) for its fastening to a slide member which is movable back and forth along a feed beam, the attachment element having a contacting surface (17) for co-operation with a contacting element supported by the slide and a fastening element (18, 19) for the engagement with fasteners co-operating with the slide. The machine is distinguished by the rock drilling machine (1) being provided also with a second attachment element on a second attachment side (15), the second attachment element being configured similarly to the first attachment element, having a contacting surface (17) and fastening element (18, 19), to allow the rock drilling machine (1) to be fastened to the slide member also with the second attachment element. A rock drilling system has the rock drilling machine as one of its components.

Abstract: A drive system for wellbore operations, the drive system, in certain, but not necessarily all aspects, including a main body, a motor apparatus, a main shaft extending from the main body and rotatable by the motor, the main shaft having a top end and a bottom end, and an item, the item non-threadedly connected to the main shaft.

Abstract: The present invention relates to a powered hammer device including: a hammer with at least a first and a second projection; at least one translation dog adapted to engage with said projections, and a drive mechanism capable of moving the translation dog substantially reciprocally between a first and a second opposed directions, characterised in that the translation dog is adapted to engage with the first projection to move the hammer in the first direction, the translation dog then engaging the second projection to move the hammer in the reciprocal second direction.

Abstract: An apparatus and method for a modified horizontal directional drilling assembly for drilling pipe into a drilling surface. The drilling assembly comprises a power unit for supplying power to the assembly, a thrust frame adapted to be moved between a position substantially parallel to the drilling surface and a position substantially perpendicular to the drilling surface and a means for moving the thrust frame. The drilling assembly further comprises a rotary and carriage assembly mounted on the thrust frame. The rotary and carriage assembly is adapted to apply rotational, thrust and pull-back forces to the drill pipe. The drilling assembly is adapted to drill pipe into the drilling surface at any angle relative to the drilling surface between substantially parallel to the drilling surface and substantially perpendicular to the drilling surface.

Abstract: A drilling apparatus for drilling underground, small diameter bore holes wherein a support frame of the apparatus is formed in part by a pair of hydraulic cylinders arranged parallel one to another. A head mounting plate that carries the drill motor is releaseably attached to a barrel portion of each hydraulic cylinder and the barrel portion is urged by fluid pressure along a support rod extending axially through the barrel. The ends of the support rods are attached by front and rear supports to form a frame that is anchored in position relative to the movable barrel.

Abstract: A method and an equipment for controlling the operation of a rock drilling apparatus, which rock drilling apparatus comprises a percussion device for producing impact energy to a tool of the rock drilling apparatus, a rotating device for rotating the tool in a drill hole, a feeding device for feeding the tool in the drill hole and a flushing device for supplying flushing agent through the tool and the bit for flushing loose drilling waste from the hole. The feed force and the percussion power are determined and the relation between the feed force and the percussion power is adjusted to a targeted operation area within an upper and a lower limit.

Abstract: The invention provides a bolting installation apparatus comprising a base having a pair of parallel cylindrical rods held between two end plates; an intermediate carriage slidably mounted on said rods; a drilling unit carriage having at least one first rod and at least one second rod spaced apart from said first rod; a drilling unit slidably mounted on said second rod and said intermediate carriage slidably receiving said first rod of said drilling unit carriage; at least one moving means to move each of said base, said intermediate carriage and said drilling unit carriage relative to each other.

Abstract: This invention provides a roof bolt installation apparatus including a drill stabilizing mechanism including a base having a cylindrical bore therein, and a stabilizing rod extendable from the base and slidably located in the bore. The rod has a distal end, and a drill stabilizing end plate is mounted on the rod distal end. The roof bolt installation apparatus also includes a drilling unit which is adapted to rotatably carry a drill, the drilling unit being slidably mounted on the drill stabilizing mechanism, and a mechanism for moving the drilling unit along the drill stabilizing mechanism. The roof bolt installation apparatus also includes a drill depth control device including a base, a top adapted to engage the mine roof, and at least two bars connected between the drill depth control base and the drill depth control top. The bars pass through openings in the drill stabilizing plate.

Abstract: This invention provides a roof bolt installation apparatus including a drill stabilizing mechanism including a base having a cylindrical bore therein, and a stabilizing rod extendable from the base and slidably located in the bore. The rod has a distal end, and a drill stabilizing end plate is mounted on the rod distal end. The roof bolt installation apparatus also includes a drilling unit which is adapted to rotatably carry a drill, the drilling unit being slidably mounted on the drill stabilizing mechanism, and a mechanism for moving the drilling unit along the drill stabilizing mechanism. The roof bolt installation apparatus also includes a drill depth control device including a base, a top adapted to engage the mine roof, and at least two bars connected between the drill depth control base and the drill depth control top. The bars pass through openings in the drill stabilizing plate.

Abstract: A trigger controller for an electric power tool including a motor and a pull-trigger movable along a path having a foremost home position comprises a mechanical switch and a solid-state switch connected in series to the motor, wherein the mechanical switch includes a first moving contact, and the controller includes a second moving contact wherein the first and second moving contacts are movable to operate the mechanical and solid-state switches respectively at different predetermined travelling positions of the pull-trigger from the home position such that the two switches are caused to be initially closed at different times.

Abstract: An underground horizontal boring apparatus includes a framework having a pair of guide tracks and a carriage connected to the framework for movement along the tracks. The apparatus includes a mechanism for moving the carriage in forward or backward directions along the guide tracks. A drill assembly is mounted to the carriage having a drill motor for rotation of a drill rod releasably coupled thereto. A clamp assembly is mounted to one end of the framework and includes a clamp for selectively gripping the drill rod so as to rotatably release the drill rod from the drill motor when the drill motor is operated in a reverse direction. Upon release, the carriage may be moved to a start position, another drill rod may be attached to the drill motor and first rod, and boring resumed.