Seal assembly

Details Seal assembly Seal assembly

1980-09-15

1982-12-21

Purser, Ernest R.

Wells

Processes

Cementing, plugging or consolidating

166123, 166208, 166387, E21B 2304, E21B 3314

Patent

active

043644325

ABSTRACT:
Disclosed is apparatus for sealing between two concentric annular surfaces whereby the sealing engagement may be disrupted in response to an excess pressure differential acting on the sealing apparatus in one axial direction sense. Elastic means restore the apparatus to its sealing configuration upon reduction of the pressure differential. Apparatus and method disclosed are particularly applicable to cementing liners in wells.

REFERENCES:
patent: 3342268 (1967-09-01), Brown
patent: 3910349 (1975-10-01), Brown
patent: 3920075 (1975-11-01), Braddick
patent: 3934652 (1976-01-01), Cochran
patent: 4019579 (1977-04-01), Thuse

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