Impact Type Patents (Class 175/407)
  • Patent number: 9133667
    Abstract: A drill bit for drilling a hole through earth and hard materials, the drill bit including a bit body having an inner bore and a cutting head at a cutting end, the cutting head including a center portion with one or more apertures extending from the cutting end to the inner bore, a perimeter portion projecting radially outward to form a plurality of blades divided by a plurality of junk slots, a cutting face, and a plurality of cutter receptacles spaced about the cutting face. A plurality of cutters with cutter tips terminating in points are in mounted into the cutter receptacles at a pitch angle relative to the cutting face, and with the plurality of cutter points together defining a projected cutting surface.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: September 15, 2015
    Assignee: Atlas Copco Secoroc LLC
    Inventors: Mark L. Jones, Kenneth M. Curry
  • Publication number: 20130213718
    Abstract: The invention relates to a drill bit (20) for percussive rock drilling, which comprises: —a drill head (21); —a skirt (24), which has a first end and an opposite second end, the skirt being connected to the drill head at said first end; —a recess (25) extending axially through the skirt from the second end of the skirt towards the first end thereof, the recess being provided with an internal, cylindrical female thread (26); and—an impact surface (27) at the bottom of the recess. Every cross-section of the recess (25) between the impact surface and the part of the recess where the female thread has its full thread profile has a cross-sectional area which is smaller than the cross-sectional area of a cross-section of the recess at the part of the recess where the female thread has its full thread profile.
    Type: Application
    Filed: February 11, 2011
    Publication date: August 22, 2013
    Inventors: Bo Carlstrom, Jens Sundin, Susanne Lejon
  • Patent number: 8479846
    Abstract: Earth-boring tools comprise a face and a plurality of cutting elements disposed on at least a portion of the face. An impact material is positioned on at least one portion of a body and has a relative exposure equal to or greater than at least some of the cutting elements of the plurality of cutting elements. The impact material comprises a material having a lower abrasion resistance than the body. Methods of making and methods of using such earth-boring tools.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: July 9, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Trung Quoc Huynh, Calvin J. Stowe, Andrew D. Ponder, James S. Trahan
  • Patent number: 8443875
    Abstract: A down hole tool includes a tool body, a fluid cavity, a magnetorheological fluid disposed in the fluid cavity, and an electrical control unit in communication with the MR fluid. The electrical control unit is configured to adjust a viscosity of the MR fluid by varying a magnetic field.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: May 21, 2013
    Assignee: Smith International, Inc.
    Inventor: Arley G. Lee
  • Patent number: 8439135
    Abstract: A down-the-hole drill hammer assembly includes a casing, a drill stem, a drilling lug segment and a pilot drill bit is provided. The drill stem is housed within the casing and includes an abutment surface. The drilling lug segment is slidably engaged with a distal end of the drill stem and movable between an initial configuration and an extended configuration. The drilling lug segment includes a proximal end engageable with the abutment surface of the drilling lug segment. The drill stem is movable between first and second positions within the pilot drill bit. In moving to the second position, the drill stem slidingly engages the drilling lug segment and moves the drilling lug segment to the extended configuration.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: May 14, 2013
    Assignee: Center Rock Inc.
    Inventors: Leland H. Lyon, Warren Thomas Lay
  • Patent number: 7735584
    Abstract: 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 wear sleeve (5), a tubular torque shaft (3) disposed axially and centrally of the hammer assembly, and extending longitudinally through the assembly. The hammer further comprises a sliding piston (6) mounted for reciprocating movement within the inner cylinder (7) and outer wear sleeve (10) and about the tubular torque shaft (3) to strike a hammer bit (1) for reciprocal movement in a chuck (4) adjacent a forward end of the hammer assembly. The hammer bit (1) has a central bore (46) through which the torque shaft (3) extends, such that the torque shaft (3) protrudes forwardly of the hammer.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: June 15, 2010
    Assignee: Minroc Technical Promotions Limited
    Inventor: Joseph Purcell
  • Patent number: 7673706
    Abstract: A down-the-hole hammer includes a piston movably disposed in a casing and a percussion bit at an end of the casing. The percussion bit includes an integral bit and shank and a pilot removably fastened at a forward end of the bit. A method of enlarging a preexisting hole is also provided.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: March 9, 2010
    Assignee: Sandvik Intellectual Property AB
    Inventor: Rob A. Simmons
  • Patent number: 7347291
    Abstract: A bit assembly for a drilling apparatus working by impact and rotation or merely by rotation, and comprising a pilot bit (1) drilling the hole centre and in connection with the pilot bit a ring bit (2) is arranged to drill the outer circle of the hole and, further, between pilot bit and ring bit surfaces are arranged to transmit impacts and/or rotary motion from the pilot bit to the ring bit, and the bit assembly also including an arrangement for pulling protection tube into the hole on drilling. In the bit assembly between ring bit (2) and pilot bit (1) at least an arrangement transmitting rotation is jointly fitted in the ring bit shirt portion (5) by forming the rear edge of the shirt portion seen in the drilling direction to comprise surfaces with different directions, which with one of their portion (4) can transmit rotary motion force to the ring bit (2) and with their adjacent part (3) force to pull said ring bit off the hole.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: March 25, 2008
    Assignee: Robit Rocktools Ltd
    Inventor: Mikko Mattila
  • Patent number: 6808030
    Abstract: The invention concerns a drilling apparatus for enlarging a bore in the ground, comprising a drilling head (6) having a drilling bit (12); a percussion piston (14) which is driven by a drive medium (9) and which impacts against the drilling bit (12), and a hollow drill string (8) to which the drilling head (6) is fixed and through the cavity of which the drive medium (9) is passed to the percussion piston (14). The drill string (8) is surrounded by a hollow outer string (3) enclosing an annular space which surrounds the drill string (8) and through which the drive medium (9) is passed out of the borehole. The invention further concerns a method of enlarging an existing borehole, using a drilling head of that kind.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: October 26, 2004
    Inventor: Günter W. Klemm
  • Publication number: 20030019665
    Abstract: A reamer tool which is capable of removing paraffin scale, ice, salt, calcium, cement, barium and other accumulations from the inside surfaces of oil well pump tubing and casing, which reamer tool may include a housing for suspension in the well tubing or casing; a shaft slidably mounted in the housing for attachment to an impact device; shaft threads provided on the shaft; a lock nut threadibly mounted on the shaft for removably engaging the housing; and a reset spring provided in the housing between the housing and the end of the shaft. Displacement of the shaft in the housing causes the lock nut to engage the housing, and the lock nut rotates on the shaft threads and rotates the housing such that the housing rotates in the well bore or casing and removes the solid blockages from the well bore or casing.
    Type: Application
    Filed: July 26, 2001
    Publication date: January 30, 2003
    Inventor: Gary B. Horton
  • Patent number: 6494272
    Abstract: The drilling assembly includes an eccentric adjustable diameter blade stabilizer having a housing with a fixed stabilizer blade and a pair of adjustable stabilizer blades. The adjustable stabilizer blades are housed within openings in the stabilizer housing and have inclined surfaces which engage ramps on the housing for camming the blades radially upon their movement axially. The adjustable blades are operatively connected to an extender piston on one end for extending the blades and a return spring at the other end for contracting the blades. The eccentric stabilizer also includes one or more flow tubes through which drilling fluids pass that apply a differential pressure across the stabilizer housing to actuate the extender pistons to move the adjustable stabilizer blades axially upstream to their extended position. The eccentric stabilizer is mounted on a bi-center bit which has an eccentric reamer section and a pilot bit.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: December 17, 2002
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jay M. Eppink, David E. Rios-Aleman, Albert C. Odell
  • Patent number: 6202768
    Abstract: A rock drilling tool includes a pilot bit screw threaded into a front end of a drill rod. A reamer is mounted on the outside of the pilot bit. The reamer includes a central opening having a front portion and a rear portion. The front portion is connected to the pilot bit, and the rear portion constitutes a stiffening sleeve which extends around the outside of the drill rod.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: March 20, 2001
    Assignee: Sandvik AB
    Inventors: Daniel Lindgren, Per-Olof Liljebrand, Håkan Lindström
  • Patent number: 5553676
    Abstract: Several designs of reversible expanders (10, 50, 100, 150) are disclosed for use on an underground boring tool (14) of the type using an air impact hammer. The reversible expanders allow a borehole of larger diameter than the tool to be formed. The reversible expander (10) is interference fit on the outer surface of the boring tool by either pressing the expander onto the tool or by shrink fit. A reversible expander (50) has a split which allows the expander to be slid over the tool and then clamped in place by bolts. A reverse expander (100) is formed of two members (102, 104) which, when bolted together, form a taper lock engagement with the tool. Finally, a reversible expander (150) can be threaded onto threads on the outer surface of the tool.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 10, 1996
    Inventors: Kelvin P. Self, Dirk A. Wilson
  • Patent number: 5174390
    Abstract: A cluster drill includes a first plate portion and a second plate portion. The first plate portion extends parallel to the second plate portion and is rigidly affixed to the second plate portion. At least one first and second plate aperture is formed in the first and second plate, respectively. At least one modular retainer unit, to be mounted within the first and second plate apertures, retains a first and second portion of a rock drill apparatus. A cannister affixes the first plate portion relative to the second plate portion. The cannister may be either cylindrical or contain protuberances to accommodate the modular retainer unit. A drill bit lock restricts motion between the a drill bit and the second plate when desired.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: December 29, 1992
    Assignee: Ingersoll-Rand Company
    Inventor: Ewald H. Kurt
  • Patent number: 4361197
    Abstract: A blast hole drill bit is disclosed for forming longitudinally extending grooves in already drilled blast holes, having a body with a forward face and a rearwardly extending pilot diameter. One or more radially extending wings are located at the rearmost part of the pilot diameter and are V-shaped when viewed in plan. Wear resistant compacts form a part of the wings and have a V-shaped cutting edge.
    Type: Grant
    Filed: September 24, 1980
    Date of Patent: November 30, 1982
    Assignee: Kennametal Inc.
    Inventor: Clyde H. Hutzell
  • Patent number: 4317595
    Abstract: Device and method for breaking open the solidified crust of electrolyte on an electrolytic cell, in particular a cell for producing aluminum. At least one projection is provided on the lower part of the shaft of a chisel used on a crust breaker. After breaking through the crust, the chisel is lowered further at least until the lowest projection or projections reaches the lower half of the crust.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: March 2, 1982
    Assignee: Swiss Aluminium Ltd.
    Inventors: Edwin Gut, Erwin Arnold, Hans Friedli
  • Patent number: 4106578
    Abstract: A rotary air percussion drill bit which has a cylindrical body portion with first and second ends. A flat bottom face comprises one end with a shaft attached to the remaining end. A plurality of hard inserts is mounted in the body portion and projects downwardly from both the body portion and from the flat bottom face. The rotary air percussion drill bit has a first chip clearance means formed into the body portion longitudinally along its side wall with a second chip clearance formed around the side wall intermediate the first and second ends. The improvement in the rotary air percussion drill bit provides for a vertical slot which cuts through the drill base down the drill body and forms an arcuate terminus tapered to the cylindrical wall to the drill bit. A gauge tooth is mounted in the arcuate terminus at approximately to with a line normal to the axis of the drill bit.
    Type: Grant
    Filed: May 4, 1976
    Date of Patent: August 15, 1978
    Inventor: Leaman Rex Beyer