Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
System and method for controlling a wireless device
Systems, devices, methods, and compositions including fluidized x-ray shielding compositions
Mass spectrometry method
System and method of improving audio signals for the hearing impaired
Power saving methods for wireless systems
Terminal for flat test probe
Antisense modulation of C-reactive protein expression
  Randomly Featured Patents
New intermediates for the preparation of 13-thiaprostaglandin derivatives
Unified design and centralized scheduling for dynamic SIMO, SU-MIMO and MU-MIMO operation for RL transmissions
Codeword-dependent post-filtering for vector quantization-based image compression
Mortar compositions and method of making same
Spectroscopy module
Configurable RF sections for receiver and transmitter and methods for use therewith
Purse
Handset
FRP racket and method for producing the same
Power transmission apparatus