Resources Contact Us Home
Steerable rotary directional drilling tool for drilling boreholes

Image Number 12 for United States Patent #7849936.

A directional drilling apparatus for use in the directional drilling of bore holes is disclosed. The apparatus comprises a plurality of cutting elements movably mounted with respect to a rotatable body member, wherein the cutting elements are movable between first, radially retracted, positions and radially extended, positions for cutting. A rotary valve is provided for synchronising the movement of the cutting elements between their respective extended and retracted positions in accordance with the rotational position of the body member in the bore hole being drilled. Control of the directional drilling system is affected by synchronised movement of the cutting elements from an inner to an outer radial position in accordance with the angular position of the drill bit. A near bit stabiliser contacts with the portion of the well bore which was not removed with the dynamic cutters and this contact exerts a force onto the drill bit.

  Recently Added Patents
Polyurethane resin, toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method
Imaging apparatus, control method thereof, and program
Preventative traffic congestion social networking improvement system within a community
Liquid crystal shutter glasses
High performance actuator motor
Optical sensor and electronic apparatus
Internal wiring structure of semiconductor device
  Randomly Featured Patents
Thermally efficient motor controller assembly
Method for operating an x-ray analysis apparatus with two-dimensional array detector and x-ray analysis apparatus for carrying out the method
Schottky metal detection method
Sun visor for vehicles provided with a protective sun visor plate
Methods and devices to control polymerization
Footwear sole
Optical reflectance proximity sensor
Hybrid adaptive inflator for airbags
Gray scales method and circuitry for flat panel graphics display
Locking system including a customized padlock guard