Fluid handling – Destructible or deformable element controlled – Destructible element
Patent
1985-09-18
1986-05-06
Schwadron, Martin P.
Fluid handling
Destructible or deformable element controlled
Destructible element
137 71, 137461, 1376142, 166187, E21B 33127
Patent
active
045865264
ABSTRACT:
A valve housing is adapted to be supported on a tubular member, there being bore means in the valve housing. Passage means are provided in the tubular member and in the valve housing for communicating fluid from the interior of the tubular member through the bore means to the interior of an inflatable element carried by the tubular member for inflation of the inflatable element. First valve means in the bore means control fluid flow into the bore means, and second valve means in the bore means control fluid flow from the bore means to the inflatable element. Means retain the second valve means in position in the bore means to close off flow to the inflatable element until a first predetermined pressure is reached in the bore means and for releasing the second valve means so that it may move to communicate the bore means for flow to the interior of the inflatable element when the first predetermined pressure is reached. Means retain the first valve in position in the bore means to accommodate flow to the bore means until a second predetermined pressure, which is higher than the first predetermined pressure, is reached in the bore means, and for releasing the first valve means to move and close off flow from the tubular member to said bore means when the second predetermined pressure is reached. The inflating pressure and annulus well bore pressure assist in retaining the second valve means closed after the element has been inflated.
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Campbell Mason M.
Hepperle Stephen M.
N. J. McAllister Petroleum Industries Inc.
Schwadron Martin P.
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