Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Downhole tools










Image Number 3 for United States Patent #7604059.

An improved centralizer is provided for centralization of tubulars such as casings, liners, production tubing, and production screens, in oil/gas wells. Such a centralizer comprises a tubular body, wherein a portion of an outermost surface of the tubular body is formed from a first material, and a portion of, or portion adjacent to, at least one end of the tubular body, and/or a portion of an innermost surface of the tubular body, is formed from at least one second material, in contrast to unitary construction centralizers disclosed by the prior art, and the first material has a lower Young's modulus than the at least one second material.








 
 
  Recently Added Patents
Chain link
Field emission cathode device and field emission display using the same
Communication terminal, communication system, server apparatus, and communication connecting method
System and method for producing statistically valid assay means and ranges for quality control materials
Methods and apparatus for power amplifier calibration
Case for a tablet computer
Magnetic circuit and speaker using same
  Randomly Featured Patents
Semiconductor device
Digital holographic microscope
Packaging bag for secondary packaging configured to transport infectious substances
Pressurized fluid flow system for a reverse circulation hammer
Optical wavelength cross connect architectures using wavelength routing elements
Gas oven
Cable television (CATV) tuner for enhanced signal communication between subscribers in a CATV system
Very high power radiofrequency generator
Pan
Polycrystal silicon rod having an improved morphyology