Patents by Inventor Jonathan Marshall

Jonathan Marshall 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).

  • Patent number: 7648210
    Abstract: In one aspect of the invention, a pick comprises a front portion with an impact tip brazed to a carbide bolster. The carbide bolster comprises a cavity which is formed in the bolster's base end and which is adapted to interlock with a rear portion of the pick. The rear portion is adapted to be retained within a bore of a holder that is attached to a driving mechanism. The rear portion comprises a locking mechanism adapted to lock its first end within the cavity. The locking mechanism comprises a radially extending catch that is formed in the first end of the rear portion.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: January 19, 2010
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Patent number: 7537053
    Abstract: In one aspect of the invention, a downhole power generation assembly has a downhole tool string component comprising a bore. A collar is rotatably supported within the bore and has a centralized fluid passageway and a plurality of turbine blades. The collar is connected to a power generation element such that rotation of the collar moves the power generation element and induces an electrical current.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: May 26, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall, Tyson J. Wilde
  • Patent number: 7537051
    Abstract: In one aspect of the invention, a downhole power generation assembly has a downhole tool string component comprising a bore. A collar is rotatably supported within the bore and has a centralized fluid passageway and a plurality of turbine blades. The collar is connected to a power generation element such that rotation of the collar moves the power generation element and induces an electrical current.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: May 26, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall, Tyson J. Wilde
  • Publication number: 20090057016
    Abstract: In one aspect of the present invention, a drill bit has a jack element that is substantially coaxial with an axis of rotation of the drill bit and the jack element has an asymmetrical distal end that extends beyond a working face of the drill bit. A turbine is located within a bore formed in the drill bit and a flow valve is actuated by the turbine. The flow valve is adapted to route a drilling fluid in the bore into a porting mechanism adapted to extend the jack element farther beyond the working surface of the drill bit. The turbine is also adapted to rotate the jack element at variable speeds.
    Type: Application
    Filed: October 31, 2008
    Publication date: March 5, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Publication number: 20090050372
    Abstract: In one aspect of the present invention, a drill bit has a jack element that is substantially coaxial with an axis of rotation of the drill bit and the jack element has an asymmetrical distal end that extends beyond a working face of the drill bit. A turbine is located within a bore formed in the drill bit and a flow valve is actuated by the turbine. The flow valve is adapted to route a drilling fluid in the bore into a porting mechanism adapted to extend the jack element farther beyond the working surface of the drill bit. The turbine is also adapted to rotate the jack element at variable speeds.
    Type: Application
    Filed: October 31, 2008
    Publication date: February 26, 2009
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Patent number: 7488194
    Abstract: An apparatus has a downhole tubular body having a bore with a central axis. An electrical conductor assembly is disposed within the bore of the tubular component, the assembly having a first end, a second end, a first conductor, and a second conductor electrically isolated from the first conductor. At least one end of the assembly has a polished mating surface which has an electrically conductive portion surrounded by a dielectric material. The electrically conductive portion is in electrical communication with the first conductor. The first and second ends of the electrical conductor assembly are substantially aligned to the central axis of the bore by stabilizing elements within the bore.
    Type: Grant
    Filed: July 3, 2006
    Date of Patent: February 10, 2009
    Inventors: David R. Hall, Scott Dahlgren, Joe Fox, Tyson J. Wilde, Paul M. Schramm, Jonathan Marshall
  • Publication number: 20080302572
    Abstract: In one aspect of the present invention a drill bit has a jack element with a distal end extending beyond a working face. A porting mechanism within the bore comprises first and second discs contacting along a flat interface. The first disc is attached to a turbine which is adapted to rotate the first disc with respect to the second disc. The discs comprise a first set of ports adapted to align and misalign with each other as the first disc rotates. The first set of ports is adapted to route a drilling fluid to extend the jack element.
    Type: Application
    Filed: July 23, 2008
    Publication date: December 11, 2008
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Patent number: 7462051
    Abstract: In one aspect of the invention, a downhole electrical connection system comprises first and second tubular bodies adapted for threaded connection to each other, each tubular body comprising an inner and an outer diameter. First and second electrical conductor assemblies are disposed within the inner diameters of the tubular bodies and are substantially coaxial with the tubular bodies and generally extend the length of the tubular bodies. The first electrical conductor assembly comprises a first electrical contact adapted to abut a second electrical contact of the second electrical conductor assembly when the first and second tubular bodies are coupled together. The first electrical contact is disposed within an elastically deformable wiper, and the elastically deformable wiper is adapted to expose the first electrical contact as it is engaged by the second electrical contact under an axially compressive load.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: December 9, 2008
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall, Tyson J. Wilde
  • Publication number: 20080246329
    Abstract: A retention assembly has a carbide bolster with a first and second segment brazed together, each segment forming at least part of a cavity formed of the bolster. A shaft has an inserted end is interlocked within the cavity.
    Type: Application
    Filed: June 9, 2008
    Publication date: October 9, 2008
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall, Italo Elqueta, Tyson J. Wilde, Christopher Durrand
  • Publication number: 20080238181
    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. The inserted end is interlocked to an inner surface of the cavity through a casting.
    Type: Application
    Filed: June 9, 2008
    Publication date: October 2, 2008
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall, Italo Elqueta, Tyson J. Wilde, Christopher Durrand
  • Publication number: 20080220664
    Abstract: In one aspect of the invention, a downhole electrical connection system comprises first and second tubular bodies adapted for threaded connection to each other, each tubular body comprising an inner and an outer diameter. First and second electrical conductor assemblies are disposed within the inner diameters of the tubular bodies and are substantially coaxial with the tubular bodies and generally extend the length of the tubular bodies. The first electrical conductor assembly comprises a first electrical contact adapted to abut a second electrical contact of the second electrical conductor assembly when the first and second tubular bodies are coupled together. The first electrical contact is disposed within an elastically deformable wiper, and the elastically deformable wiper is adapted to expose the first electrical contact as it is engaged by the second electrical contact under an axially compressive load.
    Type: Application
    Filed: May 22, 2008
    Publication date: September 11, 2008
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall, Tyson J. Wilde
  • Patent number: 7404725
    Abstract: In one aspect of the invention, a downhole electrical connection system comprises first and second tubular bodies adapted for threaded connection to each other, each tubular body comprising an inner and an outer diameter. First and second electrical conductor assemblies are disposed within the inner diameters of the tubular bodies and are substantially coaxial with the tubular bodies and generally extend the length of the tubular bodies. The first electrical conductor assembly comprises a first electrical contact adapted to abut a second electrical contact of the second electrical conductor assembly when the first and second tubular bodies are coupled together. The first electrical contact is disposed within an elastically deformable wiper, and the elastically deformable wiper is adapted to expose the first electrical contact as it is engaged by the second electrical contact under an axially compressive load.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: July 29, 2008
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall, Tyson J. Wilde