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 providing an intelligent visual scrollbar position indicator
System and method for dynamic quality-of-service-based billing in a peer-to-peer network
Non-volatile memory array and device using erase markers
Processing biomass
Non-volatile memory and method having efficient on-chip block-copying with controlled error rate
System, apparatus, and method for fast startup of USB devices
Information obtaining and notification, data message forwarding and handover method and access node
  Randomly Featured Patents
Clean-burning fragrance candle with consistent flame size and burn rate
Color changer mechanism
Human type 3 ryanodine receptor protein and DNA molecules coding therefor
Injection unit for a plastic injection moulding machine
Jointed swim bait fishing lure design
Stackable block system
Photodiode array and optical receiver device including the same
Electric storage batteries
Arterial puncture stabilization device
Aerosol container