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
Dynamically reconfigurable systolic array accelorators
Trading related to fund compositions
Touch-sensitive device and communication device
Multi-user remote health monitoring system with biometrics support
Method, preprocessor, speech recognition system, and program product for extracting target speech by removing noise
Peered proctoring
  Randomly Featured Patents
Externally pressurized porous cylinder for multiple surface aerosol generation and method of generation
Method of shaping coil ends of an electric appliance
Optical element, optical pickup device and optical information recording and reproducing apparatus
Fluid treatment system with bulk material beds operated in parallel and method for operating such a system
Drum snare
Apparatus for manufacturing solid solder deposit PCBs
Recording apparatus having a text processing mode using a threshold and an image processing mode using a mean valve of pixel data samples as the pixel gradation valve
Illuminating umbrella grip
Sheet-feeder for supplying a stream of single sheets to a sheet-processing machine
System and method for providing information using spoken dialogue interface