Patents by Inventor Scott Dahlgren

Scott Dahlgren has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Downhole hammer assembly
    Patent number: 7641003
    Abstract: 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 partially disposed within the body. A hammer assembly is movably disposed within the fluid passage along it central axis, the hammer assembly comprises a proximal end stabilized by a centralized upper bearing and a distal end stabilized by centralized a lower bearing. The distal end protrudes out of the working face and the hammer assembly comprises a carrier between the upper and lower bearings. Wherein, under normal drilling operations the carrier is adapted to resist a fluid pressure within the fluid passageway such that the fluid pressure will further extend the distal end of the hammer assembly from the working face by pushing on the carrier.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: January 5, 2010
    Inventors: David R Hall, John Bailey, Scott Dahlgren
  • Pick assembly
    Patent number: 7637574
    Abstract: A high impact resistant pick in a holder having a super hard material bonded to a cemented metal carbide substrate at a non-planar interface. The cemented metal carbide substrate is bonded to a front end of a cemented metal carbide bolster. A bore is formed in a base end of the carbide bolster generally opposed to the front end. A steel shank being fitted into the bore of the bolster at a bolster end of the shank, and a portion of the shank is disposed within a bore of the holder at a holder end of the shank.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: December 29, 2009
    Inventors: David R. Hall, Ronald Crockett, Scott Dahlgren, Jeff Jepson
  • Degradation assembly shield
    Patent number: 7635168
    Abstract: In one aspect of the present invention, a degradation assembly comprises a shank with a forward end and a rearward end, the rearward end being adapted for attachment to a driving mechanism, with a shield rotatably attached to the forward end of the shank. The shield comprises an underside adapted for rotatable attachment to the shank and an impact tip disposed on an end opposing the underside. A seal is disposed intermediate the shield and the shank.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: December 22, 2009
    Inventors: David R. Hall, Ronald Crockett, Scott Dahlgren
  • Constricting Flow Diverter
    Publication number: 20090301784
    Abstract: In one aspect of the present invention, a downhole assembly has a downhole tool string component with a bore adapted to accommodate drilling mud having a central passage and at least one periphery passage. At least two movable segments are peripherally positioned around a bore wall adapted to constrict a diameter of the central passage and are adapted to divert drilling mud into the at least one periphery passage. At least one opening mechanism is adapted to move a portion of the at least two movable segments toward the bore wall.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 10, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Carbide bolster
    Patent number: 7628233
    Abstract: A degradation assembly has a carbide bolster brazed within a hole formed in a surface. The bolster has a substantially straight cylindrical portion mostly disposed below the surface and a top end and a bottom end. The top end narrows from the cylindrical portion with a substantially annular concave curve to a planar interface adapted for bonding to a carbide substrate and the bottom end narrows from the cylindrical portion to a stem which bottoms out on a geometry of the hole.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: December 8, 2009
    Inventors: David R. Hall, Scott Dahlgren, Casey Webb
  • Degradation Assembly
    Publication number: 20090294182
    Abstract: In one aspect of the invention, a tool has a working portion with at least one impact tip brazed to a carbide extension. The carbide extension has a cavity formed in a base end and is adapted to interlock with a shank assembly of the cutting element assembly. The shank assembly has a locking mechanism adapted to interlock a first end of the shank assembly within the cavity. The locking mechanism has a radially extending catch formed in the first end of the shank assembly. The shank assembly has an outer surface at a second end of the shank assembly adapted to be press-fitted within a recess of a driving mechanism. The outer surface of the shank assembly has a coefficient of thermal expansion of 110 percent or more than a coefficient of thermal expansion of a material of the driving mechanism.
    Type: Application
    Filed: August 6, 2009
    Publication date: December 3, 2009
    Inventors: David R. Hall, Ronald Crockett, Scott Dahlgren
  • Downhole hammer assembly
    Patent number: 7624824
    Abstract: 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 partially disposed within the body. A hammer assembly is movably disposed within the fluid passage along it central axis, the hammer assembly comprises a proximal end stabilized by a centralized upper bearing and a distal end stabilized by centralized a lower bearing. The distal end protrudes out of the working face and the hammer assembly comprises a carrier between the upper and lower bearings. Wherein, under normal drilling operations the carrier is adapted to resist a fluid pressure within the fluid passageway such that the fluid pressure will further extend the distal end of the hammer assembly from the working face by pushing on the carrier.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: December 1, 2009
    Inventors: David R. Hall, John Bailey, Scott Dahlgren
  • Constricting flow diverter
    Patent number: 7624821
    Abstract: In one aspect of the present invention, a downhole assembly has a downhole tool string component with a bore adapted to accommodate drilling mud having a central passage and at least one periphery passage. At least two movable segments are peripherally positioned around a bore wall adapted to constrict a diameter of the central passage and are adapted to divert drilling mud into the at least one periphery passage. At least one opening mechanism is adapted to move a portion of the at least two movable segments toward the bore wall.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: December 1, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Method of manufacturing downhole tool string components
    Patent number: 7617877
    Abstract: A method for making a downhole electrical transmission system, having the steps of providing an electrically conductive assembly disposed within a first downhole tool string component, the assembly having a first end and being anchored to the first tool string component at a first predetermined distance from a primary shoulder of the first end of the component; stretching the assembly by pulling on a second end of the assembly with a stretching tool such that the second end of the assembly is held; enlarging the diameter of the second end of the assembly to a diameter larger than an original diameter of the assembly by flaring the second end of the assembly with a flaring tool; and anchoring the second end of the assembly to the first tool string component at a second predetermined distance from a primary shoulder of the second end of the component.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: November 17, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathon Marshall
  • Pick assembly
    Patent number: 7600823
    Abstract: A high impact resistant pick in a holder having a super hard material bonded to a cemented metal carbide substrate at a non-planar interface. The cemented metal carbide substrate is bonded to a front end of a cemented metal carbide bolster. A bore is formed in a base end of the carbide bolster generally opposed to the front end. A steel shank being fitted into the bore of the bolster at a bolster end of the shank, and a portion of the shank is disposed within a bore of the holder at a holder end of the shank.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: October 13, 2009
    Inventors: David R. Hall, Ronald Crockett, Scott Dahlgren, Jeff Jepson
  • Energy storage
    Patent number: 7600376
    Abstract: A system for performing work having a hydraulic circuit has a length of hose, a hydraulic fluid in the circuit in communication with the hose and with a hydraulic actuator for doing the work, and a mechanism for pressurizing the hydraulic circuit such that at least 50 foot pounds of energy is stored within the hose to perform the work.
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: October 13, 2009
    Inventors: David R. Hall, Francis Leany, David Wahlquist, Scott Dahlgren
  • Flow Guide Actuation
    Publication number: 20090236148
    Abstract: In one aspect of the present invention, a downhole drill string assembly comprises a bore there through to receive drilling fluid. A turbine may be disposed within the bore and exposed to the drilling fluid. At least one flow guide may be disposed within the bore and exposed to the drilling fluid wherein the flow guide acts to redirect the flow of the drilling fluid across the turbine. The flow guide may be adjusted by an actuator. Adjustments to the flow guide may be controlled by a downhole telemetry system, a processing unit, a control loop, or any combination thereof. In various embodiments the turbine may comprise rotatable turbine blades.
    Type: Application
    Filed: May 28, 2009
    Publication date: September 24, 2009
    Inventors: David R. Hall, Scott Dahlgren, Paula Turner, Christopher Durrand, Jonathan Marshall
  • Flow Guide Actuation
    Publication number: 20090229883
    Abstract: In one aspect of the present invention, a downhole drill string assembly comprises a bore there through to receive drilling fluid. A turbine may be disposed within the bore and exposed to the drilling fluid. At least one flow guide may be disposed within the bore and exposed to the drilling fluid wherein the flow guide acts to redirect the flow of the drilling fluid across the turbine. The flow guide may be adjusted by an actuator. Adjustments to the flow guide may be controlled by a downhole telemetry system, a processing unit, a control loop, or any combination thereof. In various embodiments the turbine may comprise rotatable turbine blades.
    Type: Application
    Filed: May 28, 2009
    Publication date: September 17, 2009
    Inventors: David R. Hall, Scott Dahlgren, Paula Turner, Christopher Durrand, Jonathan Marshall
  • Integrated circuit apparatus with heat spreader
    Patent number: 7586191
    Abstract: An integrated circuit apparatus with heat removal has an electrical interconnection network. The electrical interconnection network has a plurality of electrically and thermally conductive vias in electrical communication with terminals of at least one semiconductor device. An electrically insulating heat spreader is chemically bonded to each of the vias at an upper layer of the electrical interconnection network. At the upper layer the vias are electrically isolated from each other. In some embodiments the electrically insulating heat spreader is a polycrystalline diamond body with a metallized undersurface. The metallized undersurface may be etched away between vias.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: September 8, 2009
    Inventors: David R. Hall, H. Tracy Hall, Paul Moody, Scott Dahlgren, Marshall Soares
  • Wired Tool String Component
    Publication number: 20090212970
    Abstract: A system is disclosed as having first and second tubular tool string components. Each component has a first end and a second end, and the first end of the first component is coupled to the second end of the second component through mating threads. First and second inductive coils are disposed within the first end of the first component and the second end of the second component, respectively. Each inductive coil has at least one turn of an electrical conductor, and the first coil is in magnetic communication with the second coil. The first coil has more turns than the second coil.
    Type: Application
    Filed: April 29, 2009
    Publication date: August 27, 2009
    Inventors: David R. Hall, Scott Dahlgren, Paul Schramm
  • Downhole Percussive Tool with Alternating Pressure Differentials
    Publication number: 20090183919
    Abstract: 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 element may slide back and forth within the interior chamber as drilling fluid is channeled into either pressure chamber. Input channels supply drilling fluid into the pressure chambers and exit orifices release that fluid from the same. An exhaust orifice allows additional drilling fluid to release from the interior chamber. The amount of pressure maintained in either pressure chamber may be controlled by the size of the exiting orifices and exhaust orifices. In various embodiments, the percussive tool may form a downhole jack hammer or vibrator tool.
    Type: Application
    Filed: March 31, 2009
    Publication date: July 23, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Downhole Percussive Tool with Alternating Pressure Differentials
    Publication number: 20090183920
    Abstract: 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 element may slide back and forth within the interior chamber as drilling fluid is channeled into either pressure chamber. Input channels supply drilling fluid into the pressure chambers and exit orifices release that fluid from the same. An exhaust orifice allows additional drilling fluid to release from the interior chamber. The amount of pressure maintained in either pressure chamber may be controlled by the size of the exiting orifices and exhaust orifices. In various embodiments, the percussive tool may form a downhole jack hammer or vibrator tool.
    Type: Application
    Filed: March 31, 2009
    Publication date: July 23, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Retention System
    Publication number: 20090146489
    Abstract: A retention assembly, comprises a carbide bolster comprising a cavity formed in its base end. A shaft comprises an inserted end disposed within the cavity. The shaft is disposed within a hollow shank which comprises a first end contacting the bolster and a loaded end in mechanical communication with the shaft. Wherein, the inserted end is brazed to an inner surface of the cavity.
    Type: Application
    Filed: June 9, 2008
    Publication date: June 11, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall, Italo Elqueta, Tyson J. Wilde, Christopher Durrand
  • Tool String Threads
    Publication number: 20090139711
    Abstract: A downhole tool string component comprises a tubular body with a first and second end. The tubular body of the tool string comprises an inner surface and an outer surface. A loading member near the other end of the tubular component is disposed about the outer surface and is adapted for loading the at least one sleeve against a shoulder. The loading member comprises an internal threadform adapted to threadingly engage an external threadform in the outer surface of the tubular body. Either the external threadform or the internal threadform comprises a plurality of threads with a distal thread comprising a first thread height and a proximal thread comprising a second thread height. The first thread height is greater than the second thread height and a plurality of the threads heights between the first and second thread heights accumulatively taper from the first height to the second height.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 4, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • High pressure press
    Patent number: 7540732
    Abstract: In one aspect of the invention, a cartridge assembly is adapted for connection to a frame of a high pressure, high temperature press having a front end with a back up intermediate and coaxial with an anvil and a piston. The back up has an anterior end proximate the anvil and posterior end proximate the piston. The cartridge assembly has a hydraulic system adapted to apply axial pressure to the back-up through the piston to axially move the front end with respect to a cartridge body. The assembly also has a centralizing assembly with a rod rigidly attached to the cartridge body at a first end and a second end adapted to slide within a peripheral bore formed in the front end.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: June 2, 2009
    Inventors: David R. Hall, Timothy C. Duke, Scott Dahlgren, Ronald B. Crockett