Resources Contact Us Home
Subsurface well apparatus

Image Number 19 for United States Patent #6055213.

Method and apparatus for actuating one or more downhole well tools carried by a production or workstring conduit having an imperforate wall and for blocking fluid communication between an activating fluid body and a second fluid source within said well across dynamic seals between actuating members of the well tool, by producing selective signals through the conduit wall detectable by a member to produce an activating signal for actuating the downhole well tool by a downhole energy source.

  Recently Added Patents
Tomlinson Harashima precoding with additional receiver processing in a multi-user multiple-input multiple-output wireless transmission system
System and method for creating a build set and bill of materials from a master source model
Image erasing apparatus and recording medium conveying method for image erasing apparatus
Methods and devices for enforcing network access control utilizing secure packet tagging
Carrying case
Baseball themed hand clap maraca
Collaborative system for capture and reuse of software application knowledge and a method of realizing same
  Randomly Featured Patents
Swivel beach chair
Apparatus for folding flexible intraocular lenses
Preparation of 3,3-dimethylbutyraldehyde by oxidation of 3, 3-dimethylbutanol
Micro-electromechanical actuator
Method for monitoring hygiene
Redundancy control circuit which surely programs program elements and semiconductor memory using the same
Overlay alloy used for a surface layer of sliding material, sliding material having a surface layer comprising said alloy and the manufacturing method of the sliding material
Apparatus and method for moving track guided equipment to and from a track
Optical pickup and optical information processing apparatus
Reclosable flexible container having interior and exterior closure elements interlocked on the container walls