Arrangement for controlling communication between a tubular member and an inflatable element supported on the tubular member in a well bore
Patent
·
OSTI ID:5516909
An arrangement is described for controlling fluid communication between the interior of a tubular member and the interior of an inflatable element supported externally on the tubular member. The system consists of: a. a tubular member and a valve housing means adapted to be supported on the tubular member; b. there being bore means in the valve housing means; c. passage means in the tubular member and in the valve housing means for communicating fluid from the interior of the tubular member through the bore means to the interior of the inflatable element to inflate it; d. first valve means in the bore means for controlling fluid flow into the bore means; e. second valve means in the bore means for controlling fluid flow from the bore means to an inflatable element; f. means to retain the second valve means in a closed position in the bore means to close off flow to the inflatable element until a first predetermined pressure differential is reached in the bore means, and for releasing the second valve means so that it may move to an open position and communicate the bore means for flow to the interior of the inflatable element when the first predetermined pressure differential is reached; g. means to retain the first valve means in an open position in the bore means to accommodate flow to the bore means until a second predetermined pressure differential between the pressure in the bore means and the pressure of the annulus; h. means for moving the second valve means to its closed position in the bore means and close off flow to an inflatable element, the means for moving the second valve means to its closed position including pressure responsive means.
- Assignee:
- N.J. McAllister Petroleum Industries, Inc.
- Patent Number(s):
- US 4586526
- OSTI ID:
- 5516909
- Country of Publication:
- United States
- Language:
- English
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