Wells – Pistons – fluid driven into well
Patent
1978-11-16
1980-10-14
Pate, III, William F.
Wells
Pistons, fluid driven into well
92249, 277235R, 277DIG6, E21B 3312
Patent
active
042275733
ABSTRACT:
A piston for use as a TFL locomotive or well swab having a seal unit forming a fluid seal between the piston and the inner wall of a flow conductor or tubing string. The seal unit comprising at least one annular fin or lip extending radially from the piston. The annular fin or lip having an exterior portion formed from elastomeric material which is deformable to seal with the flow conductor and an interior portion formed from elastomeric material molded on wire mesh. The interior portion providing increased wear resistance and strength for the annular lip. In one version, the piston carries several individual seal units each having an annular lip.
REFERENCES:
patent: 2143106 (1939-01-01), Freedlander
patent: 3318605 (1967-05-01), Brown
patent: 3420928 (1969-01-01), Brown
patent: 3506068 (1970-04-01), Brown
patent: 3543852 (1970-12-01), Taylor
patent: 4050517 (1977-09-01), Matthews
Pearce Joseph L.
Ray Thomas W.
Taylor Donald F.
Yonker John H.
Felger Thomas R.
Otis Engineering Corporation
Pate III William F.
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