Abstract: The present invention relates to a milling drum for a ground milling machine, wherein a material guiding device is provided, which diverts the milled material in the direction of stagger of milling devices disposed one behind the other, as regarded in the direction of rotation. For this purpose, in particular, a wear plate is provided, which can be selectively replaced on the material guiding device. A further aspect of the present invention relates to such a material guiding device and also to a wear plate for such a material guiding device.

Abstract: A setting assembly including a settable member. A housing including a chamber and a setting material disposed in the chamber and having a first phase of matter and a second phase of matter. The setting material occupying a greater volume in the second phase than in the first phase. The setting material arranged to exert a setting force on the settable member during transition of the setting material from the first phase to the second phase. Also included is a method of setting a settable member.

Abstract: A well tool can include multiple sections, one section having a mating weld surface formed thereon, and another section having another mating weld surface formed thereon. Engagement between the mating weld surfaces can prevent lateral displacement of the well tool sections relative to each other. The mating weld surfaces are welded to each other. A method of constructing a well tool can include engaging a mating weld surface on a section of the well tool with another mating weld surface on another section of the well tool, an interface between the mating weld surfaces being inclined relative to a longitudinal axis of the well tool extending through the sections, and welding the mating weld surfaces to each other along the interface.

Abstract: A method and device for machining materials includes a tool drum having tool shafts that support machining tools that can be driven in rotation. A drive element rotates the tool shafts and the tool drum relative to each other, and a drum carrier can be moved relative to the material by using a movement device. A control device varies the speed of the relative movement between the tool carrier and material and the rotational speed of the tool drum. To avoid critical operating points, one measuring sensor measures the natural translational vibration and/or another measuring sensor determines the rotational vibrations of the tool drum. The control device has a vibration analysis module, by which a vibration spectrum can be determined, and at least one controller module, by which drive parameters can be controlled as a function of the vibrations determined by the analysis module.

Abstract: A chisel includes an elongate shank portion composed of a first steel, and a working end portion composed of a second steel that is different than the first steel. The working end portion is joined to the shank and configured to chisel a workpiece. The joined shank portion and working end portion has been heat treated to cause the first steel of the shank portion to adopt a first microstructure comprising bainite, the second steel of the working end portion to adopt a second microstructure comprising martensite, and the working end portion to have a greater hardness than the shank portion.

Abstract: A pick tool assembly (100) comprises a strike tip (210), a holder (230) and a reversible attachment mechanism 245, 350) for coupling the strike tip (210) to the holder (230), in which the strike tip (210) comprises a strike surface including an apex. The pick tool assembly (100) will be configured such that the strike tip (210) can be non-moveably coupled to the holder (230) in a plurality of mutually opposite orientations relative to the holder, the orientations being about a symmetry axis (L) through the apex. The attachment mechanism will limit the opposite orientations (245-ii, 245-ii) to being at least about 160 degrees azimuthally apart, and be configured such that the strike tip (210) may be coupled to the holder assembly (230) in either of two and only two mutually opposite orientations.

Abstract: The present invention relates to a wireless downhole unit (1) adapted to be lowered into a well (2) in a casing (3) having an inner wall (4) and an inner diameter (Dc). The wireless downhole unit comprises an electrical motor (5), a pump (6), and driving means (7) for allowing movement of the wireless downhole unit within the casing, and at least one battery pack (8). The present invention further relates to a downhole system.

Abstract: A self-propelled construction road milling machine, includes a machine frame and a milling drum housing, in which a milling drum is arranged. The machine includes a drive unit with which the height of the scraper blade of a scraper device can be adjusted in relation to the milling drum. A control unit for the drive unit adjusts the height of the scraper blade and a measurement device measures the distance between the lower edge of the scraper blade and the milled material. The control unit is designed in such a way that the scraper blade is height-adjustable depending on the height of the milled material remaining in the milled track. The control unit ensures that, on the one hand, the milled material can come out of the milling drum housing unimpeded behind the milling drum in the direction of work and, on the other hand, that the milling drum housing is shut above the material that is coming out.

Abstract: A cap assembly for sealing the open end of a well casing or other pipe includes a top plate for mounting on the open end of the pipe, a bottom plate spaced apart from the top plate, an upper expansible gasket sandwiched between the top plate and an upper clamping plate, a lower expansible gasket sandwiched between the bottom plate and a lower clamping plate, spacer sleeves extending between the clamping plates, bolts through the bottom plate, both gaskets and clamping plates, the sleeves and the top plate, and nuts on the bolts. When the bolts are tightened on the nuts, the gaskets expand to seal the pipe at spaced apart locations.

Abstract: A drive assembly for a mining machine. The drive assembly includes one-and-only-one sprocket and a housing coupled to the mining machine. The housing includes a shoe and at least partially receives the sprocket. The drive assembly also includes a motor and a drive shaft that couples the sprocket and the motor. The drive shaft rotates the sprocket and defines a longitudinal axis. The housing rotates relative to the mining machine about the longitudinal axis and in a face-to-gob direction.

Abstract: A flat cutter bit for engaging an earth strata material includes a non-rotatable shank portion, a head portion integrally formed with the non-rotatable shank portion and including a tip region distal from the non-rotatable shank portion, and a cutting insert mounted at the tip region of the head portion. The cutting insert includes a body having an angled leading face, a top surface having a relief surface, a T-land surface extending between the angled leading face and the relief surface of the top surface and a cutting edge formed at the intersection of the T-land surface and the relief surface of the top surface.

Abstract: A drill bit is disclosed that in one embodiment includes a bit body having a cutting section, a shank attached to the cutting section and a neck section and at least one sensor in contact with a surface of the shank and wherein the at least one sensor provides a signal in response to a bending moment.

Abstract: A method and apparatus for wellbore control include a downhole facing ball stop and sealing area that can stop and seal with an actuator ball migrating toward surface with wellbore returns or production. The downhole facing ball stop operates with the returning actuator ball to create a seal against any returns or production migrating toward surface such that well control is provided until the ball is removed from the sealing area or a bypass is opened around the seal.

Abstract: The invention relates to a construction vehicle for preparation of a road surface, more particularly a road milling machine or a ground stabilizer, comprising a rotatably driven milling cutter, more particularly a milling rotor or a milling drum, and a drive unit for a milling tool, comprising a drive motor and a gear unit interposed between the drive motor and the milling cutter, wherein the gear unit is in the form of a cogwheel gearbox and comprises at least two gear pairings having different gear ratios, wherein the gear pairings can be selectively engaged to form part of the drive connection or disengaged therefrom.

Abstract: A wiper plug launching tool and a method of wiping a tubular after cementing, the wiper plug launching tool including a wiper plug; a retainer in operable communication with the wiper plug; and an interlock system operatively arranged for releasing the retainer only upon release of the interlock system.

Abstract: A mining machine includes a boom, a cutter head, a valve, and an actuator. The boom defines an internal chamber and includes a first end coupled to a frame, a second end, and an opening in fluid communication with the internal chamber. The cutter head includes a plurality of cutting bits and is supported on the second end of the boom. The valve is coupled to the boom and is movable between a closed position in which the opening is covered and an open position in which the opening is at least partially uncovered. The actuator is coupled to the valve to selectively move the valve between the closed position and the opened position.

Abstract: A method for modifying a return fluid in a wellbore comprises disposing at least one controllable flow restrictor along a drill string in the wellbore. At least one parameter of interest is determined at at least one location along an annulus in the wellbore. Controllably actuating the at least one flow restrictor to modify a local property of a return fluid in the annulus based at least in part on the measured parameter of interest.

Abstract: The present disclosure provides a method for reinforcing irregular rock or irregular concrete surfaces such as rock structures in mines as well as other rock and concrete structures. The method includes applying a curable foam composition to at least a portion of a surface, at least partially curing the curable foam composition to form a foam layer adhered to the surface, applying a curable reinforcing composition onto at least a portion of the foam layer, and at least partially curing the curable reinforcing composition to form a reinforcing layer, wherein at least a portion of the reinforcing layer is adhered to the foam layer.

Abstract: A demolition apparatus including a main chassis, first and second front arms pivotally connected to the main chassis and comprising first and second wheel assemblies, respectively, a rear telescoping arm fixedly connected to the main chassis and comprising a third wheel assembly, first, second and third boom sections and a telescoping catwalk assembly, the first and second boom sections interconnected by a first hydraulic cylinder and the second and third boom sections interconnected by a second hydraulic cylinder, the first and second hydraulic cylinders comprising first and second resistances to movement, respectively, and, an excavator assembly pivotally connected to the main chassis, wherein the first, second and third wheel assemblies comprise first, second and third hydraulic motors, respectively, the first, second and third hydraulic motors are balanced and adapted to rotate the first, second and third wheel assemblies at a common speed, the first and second hydraulic cylinders are balanced and adapted

Abstract: A foundation-piering system for lifting and supporting a foundation or structure. The system provides a bracket that includes a seat plate and a pier guide. The seat plate extends horizontally below the foundation to engage the bottom surface thereof. A pad is disposed between the seat plate and the foundation to resist lateral movement of the bracket when under load. The pier guide is provided at a non-vertical angle to enable driving a pier from an initial position laterally adjacent to the foundation to a position that is vertically below the foundation. To install the bracket a face is formed along a bottom edge of the foundation and at an angle corresponding to the angle of the pier guide. The pier guide is abutted against the face when installed to minimize rotational forces encountered by the bracket. The bracket requires no fasteners or other coupling with the foundation.