Fluid handling – Systems – Sequentially progressive opening or closing of plural valves
Patent
1981-09-18
1983-10-04
Nilson, Robert G.
Fluid handling
Systems
Sequentially progressive opening or closing of plural valves
166 65M, 166332, 251139, E21B 4312
Patent
active
044073291
ABSTRACT:
A magnetically operated fail-safe cutoff valve of general application and particularly suitable for down hole fluid well applications is provided having a simple highly reliable valve for equalizing the pressure across the main cutoff valve while closed thereby permitting the same to be opened. All operating components can be either removably installed internally of a tubing string or as a portion of the string itself. In either case, typical wire line operations can be conducted through and past the lower end of the cutoff valve since the flow path of each of the illustrative embodiments provides an unobstructed linear flow path therethrough when the valve is open. The pressure equalizing valve includes multiple flow passages and is controlled by a shrouded annular armature operable independently of a tubular armature controlling the main cutoff valve. The two armatures may be located in either common or separate flux circuits.
REFERENCES:
patent: 3249124 (1966-05-01), Berryman
patent: 3314448 (1967-04-01), Wolf
patent: 3583442 (1971-06-01), Dollison
patent: 3731742 (1973-05-01), Sizer
patent: 4002202 (1977-01-01), Huebsch
patent: 4161215 (1979-07-01), Bourne
Huebsch Donald L.
Paulos Louis B.
LandOfFree
Magnetically operated fail-safe cutoff valve with pressure equal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetically operated fail-safe cutoff valve with pressure equal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetically operated fail-safe cutoff valve with pressure equal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-969444