Equalizing annulus valve

Wells – Packers or plugs – With expanding anchor

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

166324, E21B 3410

Patent

active

044600402

ABSTRACT:
An equalizing annulus valve for use in controlling flow in the annulus between two tubular conduits in a subterranean oil or gas well has a control pressure responsive main valve piston and a booster piston for closing radial flow ports. The booster piston is spring loaded relative to the main piston and excess annulus pressure below the valve acts on the booster piston rather than on the main piston. The main piston can be partially opened before abutting the booster piston to permit pressure below the valve to meter through an equalizing port in the main piston and through the main flow ports. When the pressure is equalized, the main piston and booster piston can be shifted to a fully open position. An auxiliary piston responsive to an increase in annulus pressure can also be used to shift the main piston.

REFERENCES:
patent: 4049052 (1977-09-01), Arendt
patent: 4271903 (1981-06-01), Slagle, Jr.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Equalizing annulus valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Equalizing annulus valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Equalizing annulus valve will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1486724

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.