Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Mechanical lockout for pressure responsive downhole tool










Image Number 7 for United States Patent #5518073.

An improved mechanical system selectively locks the tester valve of an annulus pressure responsive tester valve in position for an indeterminate number of well annulus pressure cycles. The tester valve can be closed upon demand. The forces which accomplish opening of the ball valve act across a power piston, but the forces which close the valve act across an actuating piston. The tester valve can be run into a well with an operating element of the tester valve in a first position, such as a closed position. Upon reaching the desired depth within the well and setting of an associated packer system, well annulus pressure is then increased to a first level above hydrostatic pressure to move the power piston and thus move the tester valve to an open position. During a normal mode of operation, well annulus pressure can be cycled between hydrostatic pressure and the first level to open and close the tester valve. A fluid transfer assembly is included within the power piston which is operable to transfer fluid across the power piston. The tester valve also features a multi-range metering cartridge which is operable to meter fluid over a wide range of differential pressures.








 
 
  Recently Added Patents
High conductive water-based silver ink
Electronic system with vertical intermetallic compound
Centralized behavioral information system
System and method of creating and providing SMS http tagging
Image forming apparatus with static elimination
Radiation imaging device
Mobile terminal and method for changing page thereof
  Randomly Featured Patents
Sterilizer cassette handling system with dual visual code reading
Seat assembly with foam encapsulated load-supporting fibrous matrix
Beam warping machine with a device for the maintenance of required yarn tension
Holder for 5 gallon bucket during mixing
Light emitting diode package assembly
Speed control apparatus for elevator
Barbell/dumbbell
Cyanamide-cured maleimide/epoxy resin blend
Method for determining the absolute number of electron spins in a sample of extended size
Telecommunications system with a connection processing system