Barrier tool for polished bore receptacle

Details Barrier tool for polished bore receptacle Barrier tool for polished bore receptacle

1982-07-12

1984-11-13

Purser, Ernest R.

Wells

Packers or plugs

With expanding anchor

166217, E21B 2302

Patent

active

044820143

ABSTRACT:
The present invention relates to a method and apparatus for providing a sliding seal at the upper end of a polished bore receptacle in a wellbore to permit reciprocation of tubing string and to prevent the accumulation of debris in an annulus between a tubing string and a polished bore receptacle. In particular, a slideable and releasable connection is provided on a tubing string to releasably inner-connect with the upper end of a tubular bore in a wellbore and permit a sliding and sealing relationship there between.

REFERENCES:
patent: 3489221 (1970-01-01), Crain et al.
patent: 3856081 (1974-12-01), Canalizo
patent: 3933202 (1976-01-01), Ahlstone
patent: 4109728 (1978-08-01), Sanford
patent: 4139059 (1979-02-01), Carmichael

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