Equalizing means for a subsurface well safety valve

Wells – Valves – closures or changeable restrictors – Fluid operated

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

E21B 3412

Patent

active

046290028

ABSTRACT:
In combination with a subsurface safety valve for controlling fluid flow through a well tubing of an equalizing system for reducing the pressure differential across the first valve. A housing includes an equalizing line in communication with the bore between points above and below the first valve. An equalizing valve is positioned in the line, operated from hydraulic pressure and opens prior to the opening of the first valve. A labyrinth passageway is provided in the equalizing line upstream of the equalizing valve for providing pressure drops for controlling the velocity of the fluid flowing through the equalizing valve. A seal is provided in the housing to engage the flow tube in its open position for blocking fluid flow in the equalizing line. The equalizing valve closes before the first valve starts to close thereby preventing flow through the equalizing valve. Preferably the labyrinth passageway includes a plurality of grooves and ridges.

REFERENCES:
patent: 3845818 (1974-11-01), Deaton
patent: 4007798 (1977-02-01), Gazda
patent: 4161219 (1979-07-01), Pringle
patent: 4325431 (1982-04-01), Akkerman
patent: 4373587 (1983-02-01), Pringle
patent: 4454913 (1984-06-01), Guidry et al.

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 means for a subsurface well safety 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 means for a subsurface well safety valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Equalizing means for a subsurface well safety valve will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-240040

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