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
Document-related representative information
Integrated bug tracking and testing
Tranverse in-core probe monitoring and calibration device for nuclear power plants, and method thereof
Rotation angle sensor
System and method for controlling device location determination
Generating a network map
  Randomly Featured Patents
Systems and methods for monitoring chemical and biological activities using differential measurements
Image transformation apparatus
7B2 knockout transgenic animals as models of endocrine disease
Cam gear driving apparatus of a video cassette recorder
Speed-change operating lever for a bicycle
Angular rate sensor
Driver-and-clincher operating mechanism for stapler
Synchronization for cylic redundancy check based, broadband communications network
Gel casting and electrophoresis device
Thickened organic composition having biocidal activity and an additive for thickening and imparting biocidal activity to an organic composition