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
Systems and methods for remote testing of a flow switch
Paint producing method and paint producing system
Power aware point-of-presence design and auto-configuration
Method for altering the lifespan of eukaryotic organisms
Accelerated data uploading
Hinge device
Hospital bed seat section articulation for chair egress
  Randomly Featured Patents
Gas bag restraining system assembly
Reduced development time color negative process and process compatible color negative elements
Cork remover for champagne bottles or the like
Production of alkylated aromatic compounds using dealuminated catalysts
Shower head holder
Apparatus for the purification of shower water
Methods, apparatuses, and systems allowing for bandwidth management schemes responsive to utilization characteristics associated with individual users
Hedgetrimmer with rotatable rear handle
Method and apparatus for lysing and processing algae
Device for the optical measurement of the edge to edge dimension of an object