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
Method for transmitting an electronic short message to multiple receivers
Surfcraft fin
Photoacoustic joulemeter utilizing beam deflection technique
Time sharing type autostereoscopic display apparatus and method for driving the same
Braided pull tug pet toy
Modular utility rack
Sensor controller, navigation device, and sensor control method
  Randomly Featured Patents
System and method for computing parameters for a digital predistorter
Positive working photosensitive composition
Portable cooler container
Dual-stack document storage bin for use in a self-service bunch document depositing terminal
Signature transport device with rotary arm and method
Method and apparatus for dynamic adjustment of sensor and/or metrology sensitivities
Swivel rotary file
Extended depth of field optical systems
Ink jet printing apparatus and ink jet printing method
Electro-optical device and electronic apparatus having coating member coating an inner side wall of a contact hole