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
Multi-layer stretched film
System and method of managing line pressure in a vehicle during a fault pending condition
High linearity mixer using a 33% duty cycle clock for unwanted harmonic suppression
Peer-to-peer video on demand techniques
Method and apparatus for idling a network connection
Set of radiator brackets
  Randomly Featured Patents
Wire bend machine
Light emitting semiconductor
Edge and corner sanding attachment
Device for recording or reproducing signal on or from disk with a releasing mechanism
Bus port transmission device
Process for preparing deep-frozen yeast bread dough
Multi-steer testing apparatus
Large-area projection exposure system
Method and compound for detecting low levels of microorganisms
Multi-sensor detection system