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8100200 |
Chuck assembly for a down-hole drill
A chuck assembly, an assembly for an earth-boring drill assembly, and a method of retaining a drill bit for an earth-boring drill assembly, the drill assembly including a casing. The assembly...
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8083010 |
Drilling device for drilling and reaming of a hole
A drilling device used for drilling into ground, rock or for reaming a predrilled hole includes several hammering bits in a circular shape and equipped with hammers, whereupon they together drill a...
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8051927 |
Percussive drill bit for rock drilling and method for the manufacture of such a drill bit
A drill bit for percussive rock drilling of the type that comprises a front head and a tubular skirt, which extends rearward from the head to a rear, ring-shaped end and includes an internal thread...
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7967083 |
Sensor for determining a position of a jack element
A drill string having a drill bit with a bit body located between a shank and a working face. The working face has at least one cutting element and a jack element disposed partially within the...
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7913777 |
Rock drill
The invention relates to a rock drill (1) for rotational and percussive action, comprising a drill head (2), a conveying helix (3), a clamping shank and a longitudinal drill axis (L), wherein the...
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7900721 |
Hard metal plate for rock drill and rock drill
In a hard metal plate for insertion in to a seat formed at one end of a drill shaft of a rock drill, comprising a substantially rectangular base shape having two opposed long sides extending in the...
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7891444 |
Drill bit
A drill bit comprises a plurality of cutting blades arranged circumferentially, the cutting blades having a cutting edge formed by a connecting ridge line between a cutting face and a flank; and a...
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7882908 |
Drill
A drill, which is used in a hammer drill for drilling holes in stone, concrete and the like, includes a one-piece drilling head (10, 20, 30) formed of a hard material and provided, at its first end...
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7861807 |
Drill bit including one piece cutting head
A cutting head for a drill bit has a body with an overall cruciform shape. One pair of opposing arms defines a main cutting edge. The other pair of opposing arms defines an auxiliary edge. The main...
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7849940 |
Drill bit having the ability to drill vertically and laterally
A drill bit having a plurality of cutters on its lower surface, each of which can having a plurality of PDC cutter elements disposed thereon. The cutting surface on each of the cutters is mounted...
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7744302 |
Cross-key rotational alignment locking device for VSI mineral breaker
A cross-key rotational alignment locking device for a VSI-type mineral breaker comprises a generally annular keyway 102 in the top edge portion of the main shaft 12 of the breaker, the annular...
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7740088 |
Ultrasonic rotary-hammer drill
A mechanism for drilling or coring by a combination of sonic hammering and rotation. The drill includes a hammering section with a set of preload weights mounted atop a hammering actuator and an...
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7740089 |
Drilling tool with a cutting element that is configured as a plate or head
The invention relates to a drilling tool, especially for percussion drilling, which comprises a cutting element (3) that is configured as a plate (3) or head and that has at least one cutting edge...
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7735584 |
Percussion hammer for enlarging drilled holes
The present invention relates to a percussion hammer for enlarging drilled holes. The hammer comprises an external outer wear sleeve (5), an inner cylinder (7) mounted co-axially within the outer...
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7726419 |
Drill bit, system, and method for drilling a borehole in an earth formation
A drill bit for drilling a borehole in an earth formation. The drill bit has a central longitudinal axis and may be operated by applying at least a rotary motion about the central longitudinal axis...
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7661487 |
Downhole percussive tool with alternating pressure differentials
A downhole percussive tool is disclosed comprising an interior chamber and a piston element slidably sitting within the interior chamber forming two pressure chambers on either side. The piston...
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7641003 |
Downhole hammer assembly
A drill bit assembly comprises a bit body intermediate a shank and a working face. The shank is adapted for connection to a drill string. The drill string comprising a fluid passage at least...
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7614464 |
Rock drill machine
A rock drilling machine includes a frame, and arranged inside the frame is a drill rod. A hammer gear is arranged to hammer the drill rod rear end. There is arranged around the drill rod a position...
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7607498 |
Assembly and method for discharging fluid into a drill string of a rotary-vibratory drill
According to one aspect of the invention there is provided a rotary-vibratory drilling apparatus. The drilling assembly is comprised of a vibratory apparatus, a rotary drive apparatus, a drill...
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7575074 |
Drilling head for an anchor
A separate drilling head has a distal end which contacts the material to be drilled, and a proximal end which is attached to a drive mechanism. The drive mechanism drives the separate drilling head...
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7559383 |
Hard material drilling head
A solid hard material head for a percussion drilling tool rotatable about a rotational axis (A) in a rotational direction (ω), includes at least one main bit and at least one auxiliary bit (5), ...
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7559382 |
Hard material head and rotary percussion drill bit
A hard material head (1) for a rotary percussion drill bit (2) having an elongated shaft (15) including at least three cutting edges (4) distributed circumferentially within a circumscribing...
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7549491 |
Hard material bit
A hard material bit for a rotary-percussion tool (2) includes at least one cutting edge (3), a bottom surface (6) located opposite the at least one cutting edge (3), and at least one attachment...
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7546888 |
Percussive drill bit
A percussion drill bit for drilling into a subterranean earth formation. The drill bit has a central longitudinal axis and is operable by applying repetitive axial percussive impacts on the drill...
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7527110 |
Percussive drill bit
A percussive drill bit has a working face opposite a shank end. The working face has a central jack insert and a plurality of peripheral inserts extending from the working face. The ends of the...
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7497282 |
Drill bit having radially extending cutting bits on radial legs
A drill bit for a hammer drill for drilling in stone, concrete and the like includes a drill bit head formed as a hard material body with radial legs and having at least three radially extending...
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7461706 |
Drilling apparatus with percussive action cutter
A drilling apparatus includes a cutting structure defined by a percussive action cutter and at least one other cutter. The percussive action cutter is adapted to be urged in a drilling direction by...
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7455126 |
Percussive drill bit, drilling system comprising such a drill bit and method of drilling a bore hole
A percussion drill bit for drilling into a subterranean earth formation. The drill bit has a central longitudinal axis and is operable by applying axial percussive motion along the axis and rotary...
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7441611 |
Pneumatic rock drill
A pneumatic rockdrill having a housing; a cylinder connected to a compressed air supply inlet by a set of air passages; an impact piston, at least part of which is reciprocable within the cylinder;...
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7428938 |
Percussion bit drill drive collar with retention mechanism and method of assembling
A drive collar is disclosed for use in a percussion drilling apparatus of the type for boring into the earth. Embodiments of the drive collar include a generally tubular, one-piece body further...
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7419017 |
Multi-sectional percussive drill bit assembly
A multi-sectional percussive drill bit assembly for drilling holes in earth formation primarily used in conjunction with a pneumatic percussive device. The drill bit assembly is comprised of an...
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7419016 |
Bi-center drill bit
In one aspect of the present invention a drill bit assembly comprises a working portion opposite a shank of the bit. The working portion has a plurality of cutting elements. The drill bit assembly...
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7410013 |
Boring and drilling apparatus
An apparatus (10) for use in boring is described, the apparatus including a rotatable drive shaft (12), a cam member (20) and followers (16) for converting rotational motion into reciprocal motion,...
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7401667 |
Multi-purpose drilling tool
The present invention relates to a multi-purpose drilling tool with a boring head, a drill twist connected thereto and a downstream clamping shank, a cutting element (1) being provided on the...
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7395883 |
Keyed connection for drill bit
A portion of a drilling tool having a drill bit driven in a rotating motion and in an axial percussion motion comprises a keyed connection between the drill bit and a driver sub that receives the...
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7314102 |
Percussion or hammer drill
A percussion or hammer drill is provided including a drill plate arranged in the head end of a drill shaft, extending completely across the diameter of the drill shaft and comprising an open front...
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7290624 |
Method and device for drilling holes in soil or rock material
The invention relates to a method and device for the drilling, in particular the percussive drilling or rotary percussive drilling of holes (9) in the ground or in rock, a bore hole (9) being...
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7261169 |
Shank for a rotary/percussion tool
A shank for a working tool has at least three recesses (5) provided within the lockable region (3) and arranged in a cross-section (c-c) to the tool axis (A) at least at angles of 0°, 120°, and 2...
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7258180 |
Rotary hammerdrill bit
A rotary hammerdrill bit for use with a percussion drilling device or a hammer drilling device, with a shank and a drill head attached to or configured on the shank, wherein a front side pointing...
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7255181 |
Method and device for the drilling of holes in ground or rocky material
In a method and device for drilling, in particular percussion drilling or rotary percussion drilling, holes in soil or rock material, wherein a borehole is formed by a percussive and/or rotational...
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7255182 |
Ground drilling tool
A back bit (20) is disclosed which is to used in conjunction with drilling equipment (10) which may include a derrick (11), a drilling pipe (12), a back head (14), a starting rod (13), and a...
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7231992 |
Drill bit
A drill bit has, on its face, a combination of at least one straight cutting edge and at least two curved cutting edges arranged in a Y-shape. The cutting edges on the face of the drill bit are...
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7225890 |
Cutting plate for a drill bit
An auxiliary cutting plate (10) for a multi-cutting plate drill bit (2) has a body (44) for fixing into a slot in the drill bit (2) and a profiled tip (46). The body (44) has a central longitudinal...
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7185717 |
Drill bit assembly
A drilling apparatus comprises a casing shoe, ring bit, and center bit. The casing shoe may be connected to a casing received within the casing shoe. The ring bit is received within the casing shoe...
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7168509 |
Percussive reamer and method of use thereof
A percussive drill bit or reamer having a plurality of bit segments formed into a circular pattern suitable for drilling or reaming a hole. The bit segments are close-fitted and shaped to increase...
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7124843 |
Bit assembly for a hammering drill
A bit assembly for a hammering and rotating drill, in which a main drill body (1) is arranged to drill essentially a middle portion of the hole and in the main drill body (1) there is mounted one...
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7104344 |
Percussion drilling head
Device and method for drilling into geological formations. The device comprises: a rotatable body;drilling cutters arranged on an axial end surface of the rotatable body;a percussion part, which is...
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7066694 |
Cutting plate for a drill bit
A cutting plate (4) has a working end (20) to engage a workpiece and an axis (8) of rotation. A pair of oppositely arranged first faces (34) are inclined axially rearward from the working end (20)...
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7059432 |
Cup-shaped rock drill head
A cup-shaped drill head with an inner conical surface (2) for force-locking connection with an exterior conical surface (3) of a driving drill shaft (4), which at the leading end changes over into...
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7055633 |
Concrete drill
A concrete drill for a rotary and percussively driven hand tool machine with a cutting part (1) and a striking part (2) that is axially and limited displaceable relative to the cutting part (1)....
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