Resources Contact Us Home
Expandable reamers for earth boring applications

Image Number 15 for United States Patent #7900717.

An expandable reamer apparatus for drilling a subterranean formation includes a tubular body, one or more blades, each blade positionally coupled to a sloped track of the tubular body, a push sleeve and a drilling fluid flow path extending through an inner bore of the tubular body for conducting drilling fluid therethrough. Each of the one or more blades includes at least one cutting element configured to remove material from a subterranean formation during reaming. The push sleeve is disposed in the inner bore of the tubular body and coupled to each of the one or more blades so as effect axial movement thereof along the track to an extended position responsive to exposure to a force or pressure of drilling fluid in the flow path of the inner bore.

  Recently Added Patents
Power semiconductor module
Estimating optical characteristics of a camera component using sharpness sweep data
Hydrostatic pad pressure modulation in a simultaneous double side wafer grinder
Method and apparatus for map transmission in wireless communication system
Multi user MIMO detection utilizing averaged spatial whitening
Amplitude-shift-keying (ASK) envelope detector and demodulation circuits
Systems and methods for mitigating spectral regrowth from non-linear systems
  Randomly Featured Patents
Woodworking drill bit
Upsetting press for reducing the width of rollng stock with internally cooled retaining rolls and driver rolls
Increased bulk density powders and polymers containing them
Multi-small field-of-view detector head SPECT system that scans over 360.ANG.
Automated apparatus for transporting, lining-up and stowing cylindrical fragile bodies
Image catching module and portable computer having the same
Keyboard support mechanism
Viscosity testing device
Energy storage flywheel using liquid crystalline polymer tape
Multi-tap direct sub-sampling mixing system for wireless receivers