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
Content reproduction apparatus and content processing method therefor
Image forming apparatus and job request control method instructed by authenticated users
Wireless enclosure
Power semiconductor module
Pressure-sensitive adhesive composition for optical films, pressure-sensitive adhesive optical film and image display
Taste receptors of the T1R family from domestic cat
Cantilevered probe detector with piezoelectric element
  Randomly Featured Patents
Ultrasonic transducer probe expansion chamber
Interrupt moderation
Coated sheet material and process for producing same
Instrument panel
High efficiency broadband coaxial power combiner/splitter with radial slotline cards
Light source module
Method and apparatus for a dental floss system
Drilling apparatus
Non-volatile electromechanical field effect devices and circuits using same and methods of forming same
Mobile device and power saving method thereof