Resources Contact Us Home
Non-orienting tree cap

Image Number 4 for United States Patent #7621338.

A wellhead assembly includes a tree cap having a production mandrel extending down into a production passage of a Christmas tree to form a seal. The tree has an annulus bore and an annular cavity at the upper end of the tree surrounding the upper ends of the production and annulus bore. A communication gallery leads between the annulus bore and the cavity. The tree cap also includes an annular sealing member that enters the cavity for sealing a communication gallery.

  Recently Added Patents
Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
Transistor and display device
System and method for providing an extended platform for an operating system
Random access for wireless multiple-access communication systems
Subcarrier cluster-based power control in wireless communications
System and method for optimizing use of plug-in air conditioners and portable heaters
  Randomly Featured Patents
Fluid operated cylinder device
Methods and apparatus for performing a write/load cache protocol
Driving apparatus for driving a display panel and source driver thereof
Automated in-line filter changing apparatus
Engine air intake testing device
Adjustable tire retread curing matrix
Color printer calibration with improved color mapping linearity
Video cassette rapid rewinding/fast forwarding device
Game and computer system safety stand