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).

  • Ratchet Mechanism in a Fluid Actuated Device
    Publication number: 20100212884
    Abstract: In one aspect of the present invention, a tool comprises a fluid path defined by a bore formed within a tubular body. A guided sleeve and a reciprocating sleeve are both disposed within the bore. A gearwheel is located on an outer surface of the guided sleeve and at least one pawl located on an inner surface of the reciprocating sleeve. When the reciprocating sleeve translates axially, it rotates in a first direction. As the reciprocating rotates, the at least one pawl pushes the gearwheel and causes the guided sleeve to rotate in the first direction into a new position.
    Type: Application
    Filed: October 29, 2009
    Publication date: August 26, 2010
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Downhole Tool Actuation having a Seat with a Fluid By-Pass
    Publication number: 20100212886
    Abstract: In one aspect of the present invention, a downhole tool has a fluid path defined by a bore formed within a tubular body of the tool, a reciprocating sleeve located within the bore, the sleeve has a segmented seat with a fluid by-pass; at least one seat segment is positioned by an outer diameter of the sleeve to complete the seat, and a relief formed in a wall adjacent the outer diameter of the sleeve; wherein when the seat is occupied by an obstruction only a portion of the fluid path is obstructed and fluid impinging the obstruction causes the sleeve to move in the direction of flow until the at least one segment is relieved by the relief and releases the obstruction.
    Type: Application
    Filed: July 29, 2009
    Publication date: August 26, 2010
    Inventors: David R. Hall, Scott Dahlgren
  • Hybrid vehicle
    Patent number: 7762364
    Abstract: A hybrid vehicle comprises a deceleration mechanism adapted to decelerate a wheel of the vehicle and adapted to drive an air compressor attached to the vehicle from the wheel deceleration. An engine of the vehicle comprises at least one cylinder assembly having a cylinder with an air in-take opening, and the cylinder assembly being adapted to rotate at least in part a crankshaft which is adapted to apply torque to the wheel of the vehicle. An air passage connects the compressor directly to the in-take opening, and the compressor comprises a flow regulator adapted to control an amount of air which passes from the compressor into the cylinder through the in-take valve.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: July 27, 2010
    Inventors: David R. Hall, Scott Dahlgren
  • Shield of a degradation assembly
    Patent number: 7744164
    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: June 29, 2010
    Assignee: Schluimberger Technology Corporation
    Inventors: David R. Hall, Ronald Crockett, Scott Dahlgren
  • Drill bit porting system
    Patent number: 7730975
    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: Grant
    Filed: July 23, 2008
    Date of Patent: June 8, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Downhole turbine
    Patent number: 7730972
    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: Grant
    Filed: October 31, 2008
    Date of Patent: June 8, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Thick Pointed Superhard Material
    Publication number: 20100071964
    Abstract: In one aspect of the invention, a high impact resistant tool having a superhard bonded to a cemented metal carbide substrate at a non-planar interface. The superhard material has a substantially pointed geometry with a sharp apex having 0.050 to 0.125 inch radius measured from a direction substantially perpendicular to a central axis of the tool. The superhard material also has a 0.100 to 0.500 inch thickness from the apex to the non-planar interface.
    Type: Application
    Filed: November 30, 2009
    Publication date: March 25, 2010
    Inventors: David R. Hall, Ronald Crockett, Jeff Jepson, Scott Dahlgren, John Bailey
  • Sensors on a Degradation Machine
    Publication number: 20100065290
    Abstract: In one aspect of the invention, a machine for degrading a natural and/or man-made formation has picks connected to a drum of the machine and at least one accelerometer mounted to the machine adapted to measure forces acting on the machine. Electronic equipment is in communication with the at least one accelerometer and the electronic equipment has a processor adapted to determine a change in the formation based off of input from the at least one accelerometer. The electronic equipment also is in communication with a mechanism adapted to control, at least in part, a location of the drum.
    Type: Application
    Filed: September 12, 2008
    Publication date: March 18, 2010
    Inventors: David R. Hall, David Wahlquist, Scott Dahlgren, Thomas Morris
  • Thick Pointed Superhard Material
    Publication number: 20100065338
    Abstract: In one aspect of the invention, a high impact resistant tool having a superhard bonded to a cemented metal carbide substrate at a non-planar interface. The superhard material has a substantially pointed geometry with a sharp apex having 0.050 to 0.125 inch radius. The superhard material also has a 0.100 to 0.500 inch thickness from the apex to the non-planar interface. The diamond material comprises a 1 to 5 percent concentration of binding agents by weight.
    Type: Application
    Filed: November 25, 2009
    Publication date: March 18, 2010
    Inventors: David R. Hall, Ronald Crockett, Jeff Jepson, Scott Dahlgren, John Bailey
  • Turbine Driven Hammer that Oscillates at a Constant Frequency
    Publication number: 20100065334
    Abstract: In one aspect of the present invention a hammer assembly comprises a substantially coaxial jack element with a distal end extending beyond a working face of a drill bit. A porting mechanism within the bore comprises a first and second disc substantially contacting along a flat interface substantially normal to the axis of rotation. The first disc is attached to a turbine which is adapted to rotate the first disc with respect to the second disc. The first disc comprises a first set of ports adapted to align and misalign with a second and third set of ports in the second disc. As the first disc rotates, the sets of ports are adapted to route a drilling fluid into a piston chamber where the porting mechanism causes the jack element to repeatedly extend further beyond the working surface of the drill bit at a constant frequency.
    Type: Application
    Filed: November 23, 2009
    Publication date: March 18, 2010
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Thick Pointed Superhard Material
    Publication number: 20100065339
    Abstract: In one aspect of the invention, a high impact resistant tool having a superhard bonded to a cemented metal carbide substrate at a no n-planar interface. The superhard material has a substantially pointed geometry with a sharp apex having 0.050 to 0.125 inch radius. The superhard material also has a 0.100 to 0.500 inch thickness from the apex to the non-planar interface. The diamond material comprises a 1 to 5 percent concentration of binding agents by weight. The tool further comprises a central axis which intersects the interface between the diamond material, substrate, and the radius of curvature.
    Type: Application
    Filed: November 25, 2009
    Publication date: March 18, 2010
    Inventors: David R. Hall, Ronald Crockett, Jeff Jepson, Scott Dahlgren, John Bailey
  • Sensors on a Degradation Machine
    Publication number: 20100063691
    Abstract: In one aspect of the invention, a machine for degrading a natural and/or manmade formation has picks connected to a drum of the machine and at least one accelerometer mounted to the machine adapted to measure forces acting on the machine. Electronic equipment is in communication with the at least one accelerometer and the electronic equipment has a processor adapted to determine a change in the formation based off of input from the at least one accelerometer. The electronic equipment also is in communication with a mechanism adapted to control, at least in part, a location of the drum.
    Type: Application
    Filed: September 15, 2008
    Publication date: March 11, 2010
    Inventors: David R. Hall, David Wahlquist, Scott Dahlgren, Thomas Morris
  • Downhole Tool String Component that is Protected from Drilling Stresses
    Publication number: 20100051256
    Abstract: In one aspect of the present invention, a downhole tool string component has a first and second threaded end on a mandrel, the first threaded end attached to a first sleeve and the second threaded end attached to a second sleeve. An intermediate sleeve assembly is disposed circumferentially around the mandrel and intermediate the first and second threaded ends, and the intermediate sleeve assembly is primarily isolated from stress of the first or second sleeve.
    Type: Application
    Filed: November 11, 2009
    Publication date: March 4, 2010
    Inventors: David R. Hall, Nathan Nelson, Scott Woolston, Scott Dahlgren, Jonathan Marshall
  • Degradation assembly
    Patent number: 7669674
    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: Grant
    Filed: March 19, 2008
    Date of Patent: March 2, 2010
    Inventors: David R. Hall, Ronald Crockett, Scott Dahlgren
  • Resettable actuator for downhole tool
    Patent number: 7669663
    Abstract: In one embodiment of the invention, a downhole tool string component comprising a through bore running there through formed to accept drilling fluid. At least one mechanical actuation device is also disposed within the through bore. A guide channel is disposed within the through bore and comprises a geometry shaped to conduct the at least one mechanical actuation device. A switch is disposed within the guide channel in an original position and actuatable by the at least one mechanical actuation device to a subsequent position. A resettable mechanism is in contact with the switch wherein the resettable mechanism returns the switch to its original position. A receptacle may also be disposed within the through bore comprising a geometry shaped to accept the at least one mechanical actuation device.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: March 2, 2010
    Inventors: David R. Hall, Scott Dahlgren, Nathan Nelson, David Lundgreen
  • Downhole percussive tool with alternating pressure differentials
    Patent number: 7661487
    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: Grant
    Filed: March 31, 2009
    Date of Patent: February 16, 2010
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Low Stress Threadform with a Non-conic Section Curve
    Publication number: 20100018699
    Abstract: In one aspect of the present invention a threadform has a load bearing flank and a non-load bearing flank joined by a thread root. The load bearing flank tangentially joins the thread root at a first angle, and the non-load bearing flank joins the root to a second angle. The root is made of a single non-conic section curve.
    Type: Application
    Filed: October 7, 2009
    Publication date: January 28, 2010
    Inventors: David R. Hall, Scott Dahlgren
  • Resettable actuator for downhole tool
    Patent number: 7650951
    Abstract: In one embodiment of the invention, a downhole tool string component comprising a through bore running there through formed to accept drilling fluid. At least one mechanical actuation device is also disposed within the through bore. A guide channel is disposed within the through bore and comprises a geometry shaped to conduct the at least one mechanical actuation device. A switch is disposed within the guide channel in an original position and actuatable by the at least one mechanical actuation device to a subsequent position. A resettable mechanism is in contact with the switch wherein the resettable mechanism returns the switch to its original position. A receptacle may also be disposed within the through bore comprising a geometry shaped to accept the at least one mechanical actuation device.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: January 26, 2010
    Inventors: David R. Hall, Scott Dahlgren, Nathan Nelson, David Lundgreen
  • Pick with an interlocked bolster
    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
  • Tool string direct electrical connection
    Patent number: 7649475
    Abstract: A downhole electrical transmission system having first and second tubular bodies coupled together by mating threads, each tubular body having a bore. An electrical conductor assembly is disposed within the bore of each tubular body. At least one end of each assembly has an electrical contact surrounded by a dielectric material, the electrical contact and dielectric material forming a polished, planar mating surface. The mating surfaces span an entire cross section of the end and are perpendicular to a central axis of the tubular bodies. The mating surfaces of each electrical conductor assembly are substantially engaged at a compressive load when the tubular bodies are fully mated.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: January 19, 2010
    Inventors: David R. Hall, Scott Dahlgren