Resources Contact Us Home
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
Process for brominating unsaturated organic compounds with removal of quaternary ammonium or quaternary phosphonium monochlorides
Digital video disc player
Organic semiconductor compound, semiconductor device, solar cell and producing method of organic semiconductor compound
Measuring device and measuring method that use pulsed electromagnetic wave
Proximity search methods using tiles to represent geographical zones
Pet grooming brush and vacuum attachment
  Randomly Featured Patents
Combination tip-up and hole cover
Die assembly for forming a bead on a cylindrical tube
Turbofan engine with augmented combustion chamber using vorbix principle
Method for manufacturing PMOS transistor
Clean melt nucleated casting systems and methods with cooling of the casting
Locale based call forwarding with automated creation of new locales
Electrode structures and electrooptic light gate systems