Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Firing head for a tubing conveyed perforating gun










Image Number 2 for United States Patent #4648470.

A firing head for a tubing conveyed perforating gun is shown which is operated by pressuring the interior of the tubing string. A sliding sleeve having a pressure responsive seal area changes position at a predetermined increase in tubing pressure. Movement of the sliding sleeve drains an initially filled, hydraulic cylinder within the interior of the tool. As the cylinder is drained, an associated fluid piston moves to occupy the evacuated chamber. The fluid piston is connected to a firing pin holder which releases the firing pin. Well annulus pressure acts through a port in the tool upon a pressure responsive seal area on the firing pin, thereby propelling the firing pin into a percussion detonator to fire the perforating gun.








 
 
  Recently Added Patents
Apparatus and method for foreground detection
Managing aging of silicon in an integrated circuit device
Method and apparatus for using virtual machine technology for managing parallel communicating applications
Pre-fetching map data using variable map tile radius
Lens barrel and imaging device
Surveillance apparatus and method for wireless mesh network
Manufacturing process for cellular screening substratum, resultant substratum, and method and apparatus for screening
  Randomly Featured Patents
Air Filter
Power storage device
Hair graft support tray
Table
Tilting system for outboard drive unit
Battery
Preparation of crystalline silicoaluminophosphates
Method of coding a video signal for transmission in a restricted bandwidth
Display case
Depolarizer using unpumped, doped optical fiber and method using same