Abstract: A hole coring system for drilling large diameter holes with a handheld tool. The drill bit is guided by a mandrel attached to the concrete and serves as a central guidepost that ensures precise centering of the drill bit. Commonly available tools may be used to rotate the drill bit. A lever arm may be attached to the tool and used to resist any torquing action. Additionally, a brace may be attached to the lever arm which may be used to resist any torquing action.

Abstract: The present invention relates to a safety system during the entire delayed coker operation. The present invention preferably comprises a coke drum; a first coke drum de-header system coupled to the bottom of the coke drum; a second coke drum de-header system coupled to the top of the coke drum; a containment system coupled to the second coke drum de-header system; and a remote switching system. Hence, the present invention provides system for cutting coke within a coke drum with increased safety, efficiency and convenience.

Abstract: A pilot tube drive assembly used with an auger boring machine includes a height adjustment mechanism for aligning the pilot tube path of travel with an axis about which an auger of the machine rotates during trenchless installation of underground pipe. A drive mechanism mounted on a drive assembly frame drives the pilot tube to form a pilot hole in the ground for guiding the auger. The height adjustment mechanism may include shorter and taller mounting assemblies which are typically removably mounted on the drive assembly frame. The shorter and taller mounting assemblies may be alternately mounted on the frame at the same location. Typically, the mounting assemblies are removably mounted on spaced rails of an auger boring machine frame via mounting legs which are removably inserted into openings in the spaced rails by an actuating mechanism between the rails.

Abstract: An improved method of forming a trenchless flow line is provided. The method includes support of the boring tool at each sight relief hole using a hook extending downwardly into the hole so as to overcome the force of gravity on the tool during the pilot hole drilling step. Then, a back reaming tool is connected to the end of the boring tool, and the pipe is connected to the reaming tool, such that the reaming tool reams the pilot hole to a larger diameter ahead of the pipe, which is pulled through the hole with the reaming tool. Drilling fluid is supplied during the reaming process to form a slurry which is pushed ahead of the pipe and upwardly into the sight relief holes, as the pipe is pulled through the reamed hole.

Abstract: A top drive unit guiding system for aligning a power swivel and for dissipating torque created by the power swivel. The guiding system has a first guide frame and a second guide frame, where the first and second guide frames are located on opposite sides of the power swivel. Each guide frame includes at least two wheels. Each wheel is adapted to dissipate torque created by the power swivel and align the power swivel to support guide. Each wheel is made from a hard segmented rubber, a non-segmented rubber, a rubber composite, a synthetic rubber, or combinations thereof. The wheels are mounted to at least two adjustable brackets, where one bracket is associated with each wheel, and where each bracket positions the wheel in relation to the support guide.

Abstract: A system for aligning a pile during pile driving, comprising: a pile (16) having a laterally protruding coupling (20) for a tether; and a pile guide (10) for supporting the pile as it is driven into a substrate, comprising a base frame (12) and a pile guide member (14) mounted on the base frame (12), the pile guide member (14) having in its periphery a slot (24) which is configured to allow the laterally protruding coupling (20) to pass therealong as the pile (16) passes through the pile guide; wherein the pile and pile guide member comprise two pairs of slidably interfitting profiles (52, 86) which are configured to resist gaping in the slot (24) of the pile guide member (14) as the pile (16) is driven therethrough into the substrate.

Abstract: A drill assembly, for example for drilling or coring concrete, has a drill column formed from a composite material. A track for a wall saw or for supporting other structures for movement along the track is formed from a composite material. A composite column, rail or other longitudinally extending composite structure having a hollow interior portion includes an internal support structure.

Abstract: A hydraulic drilling machine has a metal chassis shaped as a rectangular parallelepiped, drilling resources located at the front of the chassis, a rotary motor to drive drilling rods, and a hydraulic circuit. An electrical circuit powers the various components of the drilling machine. The machine can be mounted on the arm of a hydraulic mini-digger and operate without an extra hydraulic unit.

Abstract: An auger stabilizer includes a rigid elongated body having a first end and a second end. The length of the body is adjustable between a retracted transport position and an extended drilling position. A pair of spaced apart wheels are attached at the second end of the body. A split body with two halves connected by fasteners is used to pivotally attach the first end of the body to a handle of an auger. When the body is in the extended drilling position, the pair of spaced apart wheels roll along a ground surface away from the auger as the handle of the auger descends and the pair of spaced apart wheels act to stabilize the handle of the auger against reactive torque.

Abstract: A drilling machine includes a frame, a tower that is supported by the frame, two tracks for movement over the ground, at least four yokes that interconnect the frame and the two tracks, a plurality of hydraulic cylinders, a plurality of sensors, and a controller. The tower includes a drill string. Each yoke is connected to the frame and one of the tracks. Each hydraulic cylinder is movable in response to a control signal and connected to the frame and a yoke. Each sensor senses a parameter indicative of force and generates an output signal that represents the force. The controller receives the output signals from the sensors, determines a center of gravity of the drilling machine, and generates the control signals for the hydraulic cylinders based on the center of gravity. Each hydraulic cylinder is controlled to move to maintain the center of gravity within a boundary area.

Abstract: An auger boring machine includes a common power source for powering a drive motor which rotates an auger and a drive assembly which drives a pilot tube to form a pilot hole in the earth which is followed by the auger. The drive assembly is movable into and out of the operational position of the auger to allow the auger to be mounted on the drive motor. Preferably the drive assembly is removably mounted on the frame of the auger boring machine. An electric generator and hydraulic pump are powered by the common power source for operating various components of the drive assembly.

Abstract: In an angle drilling device for introducing or expanding wellbores that are inclined in relation to the horizontal, an angle-adjustable bore rig for a movable feed drive is arranged on a base frame that is movable for example. The bore rig is pivotally connected with the base frame while a connection, for example a link bar, extends between the feed drive and the base frame and has a constant length to effect during travel of the feed drive a change in incline of the bore rig as a consequence of the distance between both pivot points for the bore rig and the point of articulation of the connection.

Abstract: An apparatus and method for the movement of drilling equipment between topographically adjacent drilling locations comprises positioning a transportable planar surface over the adjacent drilling locations between which it is desired to move the equipment. Ports or other access areas extending through the planar surface to the drilling locations below are provided. The equipment to be moved is placed on top of the planar surface and is provided on its bottom with a low-drag surface which can slide across the planar surface. The equipment can be moved from one desired drilling location to another by sliding it between locations on top of the planar surface. When all of the drilling is completed, the equipment can be struck for transport and the planar surface disassembled and moved to a new drilling area. Various methods to move the equipment could be used.

Abstract: A through tubing centralizer is delivered below the tubing and expanded against a surrounding tubular for fixation. In a window milling through tubing application, a whipstock is delivered through tubing and anchored. One or more centralizers are then delivered through tubing and expanded so that their inside diameter when set exceeds their outside diameter during run in. They are placed below the tubing and above the whipstock to help a through tubing mill stay on the whipstock ramp while milling the window. After the window is started, the centralizer can be expanded fully against the surrounding tubular to allow subsequent removal of the whipstock. Optionally, the centralizer can be collapsed for removal through tubing.

Abstract: A drilling machine including a frame, a tower, a rotary head, and a rod handling device. The frame is supported for movement over the ground and the tower is mounted on the frame. The rotary head is movable along the tower and is engageable with the drill string for rotating the drill string. The rod handling device is movable along the tower and operable to selectively support the drill string. The rod handling device is biased to a first position along the tower.

Abstract: A drilling machine includes a frame, two tracks, and a plurality of yokes interconnecting the frame and the tracks. Each yoke is pivotable with respect to the frame by the extension and retraction of a hydraulic cylinder. Each of a plurality of sensors senses a parameter indicative of force and generates a signal representing the force. A controller receives the force signals, and generates control signals to extend or retract the hydraulic cylinders when an associated force deviation for a hydraulic cylinder exceeds a predetermined magnitude.

Abstract: A system for wellbore operations, the system, in at least certain aspects, including a derrick, a guide beam connected to the derrick, a top drive movable on the guide beam, torque reaction structure connected to the guide beam and to the derrick, skid apparatus held by the torque reaction structure, the skid apparatus movable vertically with respect to the torque reaction structure to prevent a vertical load from passing from the skid apparatus to the torque reaction structure.

Abstract: A rotating diverter head for use on a blow out preventer stack of an oil, gas or geothermal well. While providing for sealing and rotation of a drill pipe through the head, the head additional includes a flange on which the head is rotatable. The flange connects the head to the stack whereupon it can be rotated to align a return flow line before being locked in position.

Abstract: A top drive system having a drive motor, a gear system coupled to the drive motor, a drive quill coupled to the gear system, a top drive support system for supporting the drive motor, the gear system, and the drive quill, a lower support apparatus connected to the top drive support system, tubular handling apparatus connected to and below and supported by the lower support apparatus, the tubular handling apparatus including hydraulic-fluid-powered apparatus, provision apparatus connected to the tubular handling apparatus for providing hydraulic fluid to power the hydraulic-fluid-powered apparatus, the provision apparatus including flow line apparatus for providing hydraulic fluid to the hydraulic-fluid-powered apparatus and electrically-operable control apparatus for controlling fluid flow to and from the flow line apparatus, and electrical power generating apparatus connected to the tubular handling apparatus for providing electrical power to the electrically-operable control apparatus.

Abstract: An containerized top drive system including a container, top drive apparatus removably disposed within the container, an extension system for moving the top drive apparatus generally horizontally within a derrick, the top drive apparatus secured to the extension system, the extension system removably disposed within the container with the top drive apparatus, and the track including at least one track part which is a skid track part, the skid track part including a skid portion and a track portion, the top drive apparatus and the extension system located on the at least one skid track part within the container and the top drive apparatus supported by and movable with the at least one skid track part.

Abstract: A top drive system for wellbore operations including a hollow bore alternating current permanent magnet motor with a motor bore therethrough, a planetary gear system coupled to the motor, the gear system having a gear system bore therethrough, a quill drivingly connected to the planetary gear system and rotatable thereby to rotate a tubular member located below the quill, the motor adjacent the gear system, the motor bore aligned with the gear system bore so that fluid is flowable through the top drive system from the top of the motor to the bottom of the planetary gear system and into and through the quill.

Abstract: The rig for selectively inserting coiled tubing or a threaded tubular through a rig floor 13 and into a well includes a mast 15 extending upward from the rig floor and movable between a threaded tubular position and a coiled tubing position. A top drive 21 is movable along an axis of the mast to insert the threaded tubular in the well when a top drive axis 42 is substantially aligned with the axis 44 of the well. Injector 17 supported on the mast inserts coiled tubing into the well, with the injector having an axis 46 offset from the top drive axis and substantially aligned with the axis of the well when the mast is in the coiled tubing position. A powered drive 54 is provided for selectively moving the mast between the threaded tubular position and the coiled tubing position.

Abstract: The rig for selectively inserting coiled tubing or a threaded tubular through a rig floor 13 and into a well includes a mast 15 extending upward from the rig floor and movable between a threaded tubular position and a coiled tubing position. A top drive 21 is movable along an axis of the mast to insert the threaded tubular in the well when a top drive axis 42 is substantially aligned with the axis 44 of the well. Injector 17 supported on the mast inserts coiled tubing into the well, with the injector having an axis 46 offset from the top drive axis and substantially aligned with the axis of the well when the mast is in the coiled tubing position. A powered drive 54 is provided for selectively moving the mast between the threaded tubular position and the coiled tubing position.

Abstract: A guide rail system (1) for a power tool (2), has at least two axially extending guide rails (3, 3?), at least one guide slide (4, 4?) displaceable on the guide rails (3, 3?) having a coupling part (5a, 5b) for securing the power tool (2), a base plate (6) with a rail coupling part (7a, 7b) and a rail junction (8) displaceable on one of a guide rails (3) relative to the other guide rail (3?), wherein the rail junction (8) has a coupling part (5a, 5b).

Abstract: A transportation, storage and installation device for rig utilities. The device includes a telescoping bridge having an outer frame assembly with an opening therethrough supporting a plurality of cables. The telescoping bridge also includes an inner beam assembly receivable within the outer frame assembly opening supporting a plurality of cables, wherein the inner beam assembly may be extended from or retracted into the opening. The device also includes a utility boom having an elongated post terminating in a rotatable boom base, and a boom pivotally connected to the boom base wherein the pivotal connection has an axis transverse to the post. At least one cylinder moves the boom from a storage position substantially perpendicular to the post to a position wherein the boom is at an obtuse angle to the storage position. The device also includes a service arm supporting a plurality of electrical cables.

Abstract: The invention relates to a displacement device, particularly for construction machines, having a guide, a carriage, which is displaceably mounted along the guide, and an operating cylinder for displacing the carriage. According to the invention, for increasing the buckling resistance, at least one support element is provided, being displaceably mounted both on the piston rod and on the guide or the carriage and that for preventing lateral buckling of the piston rod, on extending the said piston rod the support element is displaceable up to a predetermined support position on said piston rod.

Abstract: Drill rod holder (10) for clamping a pair of jaws against a drill rod (40), by a piston-cylinder arrangement (22). A first of the jaws is fixed and a second jaw (36) is movable by the piston-cylinder arrangement. A medium under pressure is introduced into the cylinder to urge the piston (26) and the second jaw attached thereto to release the second jaw from the drill rod. The cylinder (2) is pre-filled with a pressurized gas (46) acting on the piston (26) to urge the second jaw (36) against the drill rod to clamp the drill rod (40) between the jaws when the gas pressure exceeds the medium pressure. The second jaw (36) is arranged to move away from the first jaw (34) when the medium pressure exceeds the gas pressure.

Abstract: A control system for a drilling machine is disclosed. The drilling machine includes a rod driver for driving a string of rods into the ground, and for removing the string of rods from the ground. The drilling machine also includes a magazine for storing rods near the rod driver. A rod transfer mechanism moves rods between the magazine and the rod driver. Vices are used to make and break joints between the rods of the drill string. The control system includes joysticks equipped with switches for controlling operational sequences of the vices and the rod transfer mechanism.

Abstract: A stakedown assembly for a horizontal directional drill that multiplies the travel of a hydraulic cylinder so that the drive head travels twice the distance of the hydraulic cylinder travel. A gear pinion is pivotally attached to a top end of the hydraulic cylinder. A first gear rack is fixedly attached to a tower, and a second gear rack is fixedly attached to a drive head. The gear pinion floats between the two gear racks, thus, producing multiplication when the hydraulic cylinder is actuated. This allows the use of a shorter hydraulic cylinder and results in a smaller overall stakedown assembly height.

Abstract: A drilling rig is provided which is adapted to selectively drill using coiled tubing and jointed-pipe. The rig includes a base, a mast, a top drive slidably mounted to said mast for performing jointed-pipe operations, and a tubing injector for performing coiled tubing operations, mounted on said mast for selective movement from a first position in which the injector is in line with the mast and a second position in which the injector is out of line with the mast to permit jointed-pipe operations by the top drive. The rig is uniquely suited to easily and quickly assemble bottom hole assemblies (BHA's), and to connect such BHA's to coiled tubing.

Abstract: An apparatus and method for the movement of drilling equipment between topographically adjacent drilling locations comprises positioning a transportable planar surface over the adjacent drilling locations between which it is desired to move the equipment. Ports or other access areas extending through the planar surface to the drilling locations below are provided. The equipment to be moved is placed on top of the planar surface and is provided on its bottom with a low-drag surface which can slide across the planar surface. The equipment can be moved from one desired drilling location to another by sliding it between locations on top of the planar surface. When all of the drilling is completed, the equipment can be struck for transport and the planar surface disassembled and moved to a new drilling area. Various methods to move the equipment could be used.

Abstract: The earth drilling and boring system for drilling bore holes in the earth has a drilling rig with a power source attached to a rotateable pipe container. There is a flexible drill pipe or tubing attached to end retained in the pipe container that has an opening through which an end of the drill pipe or tubing having a drill bit attached may be extended and retrieved. A drive mechanism is positioned adjacent to the opening for receipt and movement of the drill pipe or tubing to be used in boring.

Abstract: The present disclosure provides a coring guide for converting a mine roof bolter into apparatus suitable for guiding a coring rod, or drill, into a mine roof, as well as a method for obtaining a geological core from the mine roof using the guide. The guide includes a pair of jaws, wherein each jaw has an adapter end and a pivotable end. The adapter end of each jaw includes a cavity that faces a cavity included in the adapter end of the other jaw, such that the closed jaws form at least a major portion of a cylindrical coring cavity that accommodates a coring rod. Each jaw includes means for fixing the rod guide within a mine roof bolter apparatus such that when the coring guide is positioned between the jaws and the jaws are partially closed such that they enclose the coring rod, the roof bolter causes the coring rod to penetrate the mine roof and obtain a core sample.

Abstract: The drilling machine of the present invention includes a frame, a tower, a rotary head, and a rotary head guide. The tower is mounted on the frame and includes an elongated member. The rotary head is engageable with the drill string and slidably coupled to the elongated member for movement along the tower. The rotary head guide includes a support, a wear block, a backing bar, and an adjustment mechanism. The support is coupled to the rotary head, the wear block is slidably engaged with the elongated member, and the backing bar is coupled between the wear block and the support. The adjustment mechanism is coupled to the support and engages the backing bar such that adjustment of the adjustment mechanism moves the backing bar away from the support to move the wear block against the elongated member.

Abstract: The drilling machine includes a frame that is supported for movement over the ground and a tower that is mounted on the frame. A rotary head is movable along the tower and engageable with a drill string for rotating the drill string. A pull down cable is connected to the rotary head for pulling the rotary head downward for pushing the drill string into the ground. A pull back cable is connected to the rotary head for pulling the rotary head upward for pulling the drill string out of the ground. The pull back cable is subject to a slack condition in response to elastic stretch of the pull down cable. A slack take-up device is connected to the pull back cable to remove the slack created in the pull back cable by the elastic stretch of the pull down cable.

Abstract: The present disclosure provides a coring guide for converting a mine roof bolter into apparatus suitable for guiding a coring rod, or drill, into a mine roof, as well as a method for obtaining a geological core from the mine roof using the guide. The guide includes a pair of jaws, wherein each jaw has an adapter end and a pivotable end. The adapter end of each jaw includes a cavity that faces a cavity included in the adapter end of the other jaw, such that the closed jaws form at least a major portion of a cylindrical coring cavity that accommodates a coring rod. Each jaw includes means for fixing the rod guide within a mine roof bolter apparatus such that when the coring guide is positioned between the jaws and the jaws are partially closed such that they enclose the coring rod, the roof bolter causes the coring rod to penetrate the mine roof and obtain a core sample.

Abstract: A ground drilling machine includes a machine body a rod propelling device, a rod exchanging device and a support unit provided for the machine body for supporting the rod exchanging device. The rod propelling device has a frame movably mounted to the machine body. The frame is slidable on a support portion provided for the machine body. The rod exchanging device is attached to the frame of the rod propelling device via a transverse mounting member. The rod exchanging device is also supported on the support unit so as to be slidable on the support unit along with the movement of the rod propelling device without changing of its relative position to the rod propelling device. The rod exchanging device can be made light and compact because the rod exchanging device is supported by the support unit which is provided for the machine body and accordingly a large bending load is not applied to the main body portion of the rod exchanging device.

Abstract: A tool for boring has a first shaft for drivingly linking at a first end to a portable rotatable machine. At a second end, the tool has a fastener to which a modular auger section can be drivingly linked. A second shaft of the tool has an outer surface to which a radially inwardly extending edge of a helical flight is attached. A cylindrical collar is attached to a radially outwardly extending peripheral edge of the flight and is mounted radially outwardly of the second shaft. An insulator interposed between the shafts electrically insulates the shafts from each other. The shafts can be unlinked through a shear pin breaking in response to a predetermined amount of relative torque to the shafts.

Abstract: A drilling tool, consisting of an hydraulic excavator 2 and a drilling unit 7, is used for producing geotechnical bore holes. The drilling unit 7 is connected to the boom 5 of the hydraulic excavator 2 by way of a tilt head 15 with three degrees of freedom or three axes of rotation 16, 17, 18, which allow for it to be easily moved into the most varied working positions, especially in such a way as to permit drilling action that is considerably above the standing surface of the hydraulic excavator 2.

Abstract: A blast hole drill comprising a mast including two parallel mast cords, a carriage, and a rotary head mounted on the carriage and adapted to engage a drill pipe. The rotary head includes a drive pinion on a rack on one of the mast cords, and the drive pinion is on one side of at least one of the mast cords. A backup wheel assembly is on the opposite side of the respective mast cord opposite the pinion and includes a wheel holding assembly support rotatably supporting a backup wheel, a yoke having an opening through the yoke, a plunger threadably received in the yoke opening, the wheel assembly support being slidably received on the plunger, and Belleville washers extending around the plunger and between the yoke and the wheel holding assembly support, the Belleville washers extending between an abutment on the plunger and the wheel holding assembly support.

Abstract: A drill for forming undercuts in cylindrical bores formed in stone or concrete and including a drilling member (2;22) having a stem (3;23) provided, at its opposite longitudinal ends, respectively, with a shank (4;24) receivable in a chuck of a hand-held drilling tool and a cutting head (5;25) with abrasive cutting bodies, and a sleeve (7;27) for receiving the drilling member (2;22) and having, at its end adjacent to the shank (4;24), a radial collar (8;28), a drag bearing (11) arranged in side the sleeve for supporting the drilling member (2;22), and at least one opening (15;35, 36, 37) formed in a front, in a direction toward the cutting head (5;25), section of the sleeve and spaced axially from the drag bearing (11) by a distance (a) amounting to from about 0.05×D to about 0.6×D, where D is an outer diameter of the sleeve in the drag bearing region of the sleeve.

Abstract: The present invention relates to an elevator (10, 134, 136, 150, 162, 186), particularly a single joint elevator, for supporting tubular members such as drill pipe (118), borehole casing and/or production tubing, for use in downhole operations. In a preferred embodiment of the invention, an elevator (10) is generally elliptical shaped, and comprises a housing (12), a lock (14), lifting eyes (16) and a hinge (18). The housing comprises first and second portions (20, 22), pivotally coupled via the hinge (18), which together define an upper ring, elliptical in cross-section, and a tapering, generally truncated cone-shaped lower portion. The tapered lower portion of the elevator (10) ensures that the elevator (10) does not become caught or fouled upon a Vee door, or a pipe discharge ramp (122), on to which the pipe (118) supported by the elevator (10) is to be discharged during, for example, the “running-in” of the pipe (118) into a borehole of an onshore or offshore well.

Abstract: A drilling apparatus includes a platform for positioning at a drilling site, a mast pivotally mounted on the platform, a rod clamp on one end of the mast for clamping a drill rod, a casing clamp on the rod clamp for clamping the mast to a top end of a casing carrying the rod, whereby the mast is anchored to the ground during drilling, and a drill head slidable on the mast for driving the drill rod during drilling. By anchoring the apparatus to the bedrock during drilling a core sample removal, the apparatus cannot become misaligned due to reaction forces between the drill and the ground.

Abstract: A self-erecting rig is adapted for deployment on a platform and includes hydraulic jacks and rails. The rig structure is made up of stacked, interlocking modules having open areas pre-fitted with well equipment such as mud pumps, mud tanks, and power packs. The rails are disposed on a platform and guide the modules to the hydraulic jacks. Hydraulic jacks, also fixed onto the platform, are configured to releasably engage and elevate the modules. During deployment, the jacks engage a module and hoist it to a pre-determined height. While the engaged module is suspended, another module is slid immediately below. After the two modules interlock, the jacks repeat the process.

Abstract: A multi-purpose drilling rig has a movable pipe support cradle which moves horizontally to transfer drill pipe from a storage area to the well being drilled, and vice versa. The cradle travels along a roof platform supported by load-bearing hydraulic lifting rams. Raising or lowering the lifting rams raises or lowers the roof platform, along with the drill pipe suspended from the cradle. Structural towers stabilize the lifting rams against buckling and lateral loads. Supplementary lifting capacity is provided cradle-mounted roof rams having pistons which may extend downward from the cradle, with the drill pipe suspended from a yoke interconnecting the roof ram pistons. For offshore drilling, a control system senses fluctuations in rig elevation due to wave action, and automatically adjusts extends or retracts the rams as required to maintain constant load on the drill bit. Also disclosed is a method of drilling which utilizes vertical and lateral movement of the cradle and top drive.

Abstract: A hand-held tool including a housing, a rod-shaped stop secured on the housing and a dust collector (3) having a dust screen (4) for at least partially circumferentially surrounding a working tool (2) insertable into tool, a deflection-resistant, axially resiliently displaceable at a radial distance from a tool axis (A), suction conduit (6), and guide and connection elements (7) for securing the dust collector (3) on the depth stop (9).

Abstract: The invention relates to a machine for making bored piles. The machine comprises a vertical guide mast; a rotary drive head that is movable relative to the mast; an auger having a hollow core and at least one helical blade; an extender tube whose bottom end is secured to the top end of the auger, said drive head co-operating with said extender tube to rotate both the extender tube and the auger; a dip tube slidably mounted in the hollow core of the auger and the extender tube, the dip tube having a top end connected to a concrete feed pipe; and an annular actuator having a first end secured to the top end of said extender tube and a second end secured to the top end of said dip tube.

Abstract: An apparatus for preventing pipe buckling when downwardly directed axial forces are applied to a pipeline (3) which extends from a derrick (1) down into a well bore, especially when snubbing. The apparatus comprises two sets of pipe supports (8) linked together to give a continuous chain (10), which is arranged to extend from a respective guide rail (6, 7) in the derrick (1) to the pipeline (3), and the pipe supports (8) are movably arranged in the guide rail (6, 7) parallel to the pipeline (3). The guide rail (6, 7) extends in a general U-shape with the U-bend (6c, 7c) located closest to the lower end of the derrick (1) and comprises two legs (6a, 6b, 7a, 7b), of which a first leg (6a, 7a) is arranged close to the pipeline (3) and a second leg (6b, 7b) is arranged at a greater distance from the pipeline. The pipe supports (8) are designed to be placed in the first leg (6a, 7a) when operative, and are designed to be transferred to the second leg (6b, 7b) when they are to be rendered inoperative.

Abstract: A double-head drilling machine is disclosed, which by changing over or converting small component units can cooperate with drill or drill pipes of different diameters. To this end, drive carriages (16) operating on drills or drill pipes, for example, comprise a carriage base element (32), to which a drive unit (42) is releasably fitted. The drive unit (42) can thus be replaced by a different drive unit having essentially the same geometry, which is designed for operating with a drill or drill pipe having a different diameter.

Abstract: A pile is provided for installing poles in loose soils such as marshes, muskegs or granular soils. The pile is hollow, cylindrical and open-ended. It uses a serrated bottom end for cutting through the ground, and has retainment slots at its top end for slidably engaging a spinner bar for rotating the pile. The pile may be used with an auger to enhance ground penetration during installation of the pile. The pile is modularly extendible in lengths to thirty feet or more. The pile is twisted into the ground using high-torque hydraulically driven digger motors mounted on commercially available construction equipment.