Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1986-01-17
1987-09-08
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
Fluid operated
166323, E21B 3408
Patent
active
046917799
ABSTRACT:
An annulus pressure responsive downhole tool includes a housing with an operating element disposed in the housing. The operating element is movable from a first element position to a second element position relative to the housing. A hydrostatic well annulus pressure referenced annulus pressure responsive first power piston is disposed in the housing and movable from a first to a second position thereof relative to the housing in response to an increase in well annulus pressure. A lower than hydrostatic well annulus pressure referenced annulus pressure responsive second power piston is disposed in the housing and is operatively associated with the operating element for permitting the operating element to move from its first element position to its second element position in response to movement of the second power piston from a first position to a second position thereof relative to the housing. A prevention device is operatively associated with the first and second power pistons for preventing the second power piston from moving to its second position until the first power piston has moved at least part way towards its second position.
REFERENCES:
patent: 3779263 (1973-12-01), Edwards et al.
patent: 3856085 (1974-12-01), Holden et al.
patent: 3858649 (1975-01-01), Wray et al.
patent: 3860069 (1975-01-01), Wray et al.
patent: 3964305 (1976-06-01), Wray et al.
patent: 3964544 (1976-06-01), Farley et al.
patent: 3970147 (1976-07-01), Jessup et al.
patent: 3976136 (1976-08-01), Farley et al.
patent: 4063593 (1977-12-01), Jessup
patent: 4064937 (1977-12-01), Barrington
patent: 4083409 (1978-04-01), Barrington
patent: 4109725 (1978-08-01), Williamson et al.
patent: 4113012 (1978-09-01), Evans et al.
patent: 4258793 (1981-03-01), McGraw et al.
patent: 4270610 (1981-06-01), Barrington
patent: 4281715 (1981-08-01), Farley
patent: 4311197 (1982-01-01), Hushbeck
patent: 4324293 (1982-04-01), Hushbeck
patent: 4328866 (1982-05-01), Zimmerman
patent: 4341266 (1982-07-01), Craig
patent: 4355685 (1982-10-01), Beck
patent: 4422506 (1983-12-01), Beck
patent: 4429748 (1984-02-01), Beck
patent: 4444268 (1984-04-01), Barrington
patent: 4445571 (1984-05-01), Hushbeck
patent: 4448254 (1984-05-01), Barrington
patent: 4452313 (1984-06-01), McMahan
patent: 4489786 (1984-12-01), Beck
patent: 4515219 (1985-05-01), Beck
patent: 4537258 (1985-08-01), Beck
patent: 4553598 (1985-11-01), Meek et al.
patent: 4557333 (1985-12-01), Beck
patent: 4573535 (1986-03-01), Manke
patent: 4633952 (1987-01-01), Ringgeberg
McMahan Michael E.
Newman Daniel A.
Winslow Donald W.
Zunkel Gary D.
Bui Thuy
Duzan James R.
Halliburton Company
Novosad Stephen J.
LandOfFree
Hydrostatic referenced safety-circulating 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 Hydrostatic referenced safety-circulating valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrostatic referenced safety-circulating valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2153367