Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1975-11-19
1978-04-04
Aegerter, Richard E.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277103, 166187, F16J 1546
Patent
active
040822982
ABSTRACT:
An inflatable packer including a tubular mandrel having generally radial ports therethrough and a sub slidably telescopically mounted on the mandrel. A first annular space, in communication with the ports, is formed between the mandrel and the sub. An inflatable packer element is carried by the sub, the mandrel extending through the packer element such that a second annular space is formed between the mandrel and the packer element. A valve mechanism is disposed in the first annular space and includes an annular seal means and a locking mechanism. The seal means is operative upon the presence of pressure differential decreasing thereacross toward the second space to permit fluid flow through the first annular space from the ports to the second annular space and inflate the packer element. The seal means is further operative upon the presence of pressure differential decreasing thereacross toward the ports to form a seal between the ports and the second annular space. The locking mechanism is operatively associated with the seal means to lock the mandrel against upward movement with respect to the sub upon the presence of the last mentioned pressure differential. An upward pull on the mandrel releases the locking mechanism to break the seal and deflate the packer element.
REFERENCES:
patent: 2684274 (1954-07-01), Saxon
patent: 2994378 (1961-08-01), Reistle
patent: 3337222 (1967-08-01), Smith et al.
patent: 3397893 (1968-08-01), Kampert
patent: 3527296 (1970-09-01), Malone
patent: 3940151 (1976-02-01), Phillips
patent: 3941190 (1976-03-01), Conover
Aegerter Richard E.
Footland L.
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