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
Base station synchronization for a single frequency network
Heat transfer label for decorating a metal container
Load control device
Liquid crystal display device
Phosphoinositide 3-kinase inhibitor with a zinc binding moiety
Method to prevent hyper frame number de-synchronization in a wireless communication system
OFDM control signaling in the presence of timing asynchronization in a peer-to-peer network
  Randomly Featured Patents
Inhaler
Bucket leveling mechanism
Semiconductor pressure sensor and related methodology with polysilicon diaphragm and single-crystal gage elements
Cantilever mounting system
Vertical hydrodynamic bearing apparatus
Synthetic DNA sequence having enhanced insecticidal activity in maize
Method of forming microcoil structure for integrated circuits
Hydrocyclone separation system
Wall telephone frame
Automatically functioning emergency fuel supply system for internal combustion engine