Device for Suspending Measuring Instruments in a Drill String
|
patent
|
January 1974 |
Apparatus for Selectively Receiving and Releasing Well Tools
|
patent
|
August 1974 |
Drill string shock absorber
|
patent
|
March 1976 |
Directional drilling apparatus
|
patent
|
January 1978 |
Shock absorber for well drilling pipe
|
patent
|
January 1979 |
Hydraulic shock absorbing method
|
patent
|
October 1979 |
Shock absorber assembly for absorbing shocks encountered by a drill string
|
patent
|
June 1983 |
Bit guidance device and method
|
patent
|
November 1983 |
Intermittently rotatable down hole drilling tool
|
patent
|
January 1984 |
Shock absorber assembly
|
patent
|
March 1984 |
Vibration isolator and shock absorber device
|
patent
|
December 1986 |
Methods and apparatus for controlled directional drilling of boreholes
|
patent
|
January 1987 |
Mud turbine tachometer
|
patent
|
March 1987 |
Annulus pressure operated vent assembly
|
patent
|
March 1988 |
Method for the detection and correction of magnetic interference in the surveying of boreholes
|
patent
|
August 1988 |
Vibration isolator and shock absorber device with conical disc springs
|
patent
|
October 1988 |
Method for measurement of azimuth of a borehole while drilling
|
patent
|
March 1989 |
Method and apparatus for measurement of azimuth of a borehole while drilling
|
patent
|
January 1990 |
Corrosion resistant, magnetic alloy article
|
patent
|
February 1991 |
Means for varying MWD tool operating modes from the surface
|
patent
|
July 1991 |
Hydraulic shock absorber with nitrogen stabilizer
|
patent
|
July 1992 |
Modular connector for measurement-while-drilling tool
|
patent
|
October 1993 |
Method and apparatus for automatic closed loop drilling system
|
patent
|
July 1994 |
Apparatus for magnetically treating a fluid
|
patent
|
November 1994 |
Magnetorheological materials based on alloy particles
|
patent
|
January 1995 |
Magnetorheological fluid devices
|
patent
|
March 1995 |
Apparatus for directional drilling
|
patent
|
June 1995 |
Device for the magnetic treatment of fluids
|
patent
|
October 1995 |
Steerable drilling tool and system
|
patent
|
January 1996 |
Steerable drilling tool and system
|
patent
|
June 1996 |
Modulated bias units for steerable rotary drilling systems
|
patent
|
September 1996 |
Steerable drilling tool and system
|
patent
|
April 1997 |
Downhole sub for directional drilling
|
patent
|
June 1997 |
Method of operating a steerable rotary drilling system
|
patent
|
November 1997 |
System and method of controlling rotation of a downhole instrument package
|
patent
|
December 1997 |
Steerable rotary drilling systems
|
patent
|
January 1998 |
Steerable rotary drilling systems and method of operating such systems
|
patent
|
September 1998 |
Apparatus for joining sections of pressurized conduit
|
patent
|
October 1998 |
Elastomeric joints having interlocking threaded portions
|
patent
|
November 1998 |
Closed loop drilling system
|
patent
|
November 1998 |
Apparatus for joining sections of pressurized conduit
|
patent
|
July 1999 |
Cooled electrical system for use downhole
|
patent
|
August 1999 |
Magneto-rheological fluid damper
|
patent
|
February 2000 |
Stator especially adapted for use in a helicoidal pump/motor
|
patent
|
August 2000 |
Method and apparatus for communicating with devices downhole in a well especially adapted for use as a bottom hole mud flow sensor
|
patent
|
August 2000 |
Rotary steerable system for use in drilling deviated wells
|
patent
|
September 2000 |
Proactive shock absorption and vibration isolation
|
patent
|
September 2000 |
Electrical coupling for a multisection conduit such as a drill pipe
|
patent
|
September 2000 |
Cooled electrical system for use downhole
|
patent
|
October 2000 |
Rotary steerable well drilling system utilizing sliding sleeve
|
patent
|
December 2000 |
Magnetorheological fluid apparatus, especially adapted for use in a steerable drill string, and a method of using same
|
patent
|
July 2001 |
Valve on the basis of electrorheological and/or magnetorheological fluids
|
patent
|
April 2002 |
Method for controlling the damping force of a damper
|
patent
|
April 2003 |
Downhole actuation system utilizing electroactive fluids
|
patent
|
May 2003 |
Method of calibrating a solenoid operated pressure control valve and method of controlling same
|
patent
|
May 2005 |
Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters
|
patent
|
October 2005 |
Method of drilling with magnetorheological fluid
|
patent
|
April 2006 |
Method to form a barrier in reservoir with a magnetorheological fluid
|
patent
|
April 2006 |
Controllable magneto-rheological fluid-based dampers for drilling
|
patent
|
May 2006 |
System and method for damping vibration in a drill string
|
patent
|
May 2007 |
Steerable bit assembly and methods
|
patent
|
October 2007 |
Water control device using electromagnetics
|
patent
|
February 2011 |
System and method for device suspension and wireless power transmission
|
patent
|
March 2011 |
Steerable bit system assembly and methods
|
patent
|
April 2011 |
System and method for damping vibration in a drill string
|
patent
|
August 2011 |
System and method for damping vibration in a drill string using a magnetorheological damper
|
patent
|
January 2012 |
Flow control valve with magnetic field sensor
|
patent-application
|
December 2004 |
Steerable bit assembly and methods
|
patent-application
|
March 2005 |
Residual magnetic devices and methods
|
patent-application
|
October 2006 |
Residual magnetic devices and methods
|
patent-application
|
October 2006 |
System And Method For Damping Vibration In A Drill String
|
patent-application
|
December 2008 |
System and Method for Damping Vibration in a Drill String Using a Magnetorheological Damper
|
patent-application
|
September 2010 |
Field Investigation of the Effects of Stick-Slip, Lateral, and Whirl Vibrations on Roller Cone Bit Performance
|
conference
|
October 1999 |
Experimental Evaluations of Drill Bit and Drill String Dynamics
|
conference
|
September 1994 |
The Design of Steerable BHA's To Minimize the Adverse Effects of Motor Imbalance and Drilling Forces
|
conference
|
October 1991 |
Phenomenological Model for Magnetorheological Dampers
|
journal
|
March 1997 |
Magnetic properties of an AISI 420 martensitic stainless steel
|
journal
|
November 2000 |
Shock Sub Performance Tests
|
conference
|
March 1998 |