Resources Contact Us Home
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
System and method for mapping and displaying audio source locations
Cosmetic container
Method and structure for forming capacitors and memory devices on semiconductor-on-insulator (SOI) substrates
Circular saw
Mixtures and methods for the induction of resistance in plants
Model for system-wide application extension
Door-activated entry light fixture
  Randomly Featured Patents
Program guide user interface
Systems and methods of improved motion estimation using a graphics processing unit
System for capability assessment and development
Storage device for laboratory samples having storage racks and a shaker
Multiple material golf club head
Telecommunication access management system for a packet switching network
Spathiphyllum plant `S4`
Resealable, refillable container system
Method, apparatus, and computer program product for pacing clocked operations
Communication of secondary channel byte in a synchronous modem without statistical uncertainty