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
Method and system for automatic 3-D image creation
Systems and methods for providing a collaboration place interface including data that is persistent after a client is longer in the collaboration place among a plurality of clients
Stable light source device
Catecholic butanes and use thereof for cancer therapy
Substituted di-arylhydantoin and di-arylthiohydantoin compounds and methods of use thereof
System for setting programmable parameters for an implantable hypertension treatment device
Plural component proportioner
  Randomly Featured Patents
Delay trading between communication links
Apparatus for optical scanning along with measurement of optical characteristics within scanning region
Methods of forming electrically interconnected lines using ultraviolet radiation as an organic compound cleaning agent
Portable line tester or similar article
Specific eatable taste modifiers
Door latch for recreational vehicle and other applications
Method of encoding and decoding data in blocks, and encoding and decoding devices implementing this method
Glitch-free memory address decoding circuits and methods and memory subsystems using the same
Refrigerating oil composition
Radiation generating apparatus and method