Knockdown centralizer

Details Knockdown centralizer Knockdown centralizer

1975-12-19

1977-03-15

Purser, Ernest R.

Wells

Guide for device or conduit

On sucker or pump rod

403353, E21B 1710

Patent

active

040119076

ABSTRACT:
A centralizer having springs ends with inwardly projecting radial lugs for non-weld attachment to an end collar of the centralizer. The lugs can be rounded to allow the spring ends to rotate relative to the end collars while being longitudinally restrained.

REFERENCES:
patent: 1801334 (1931-04-01), Dalldorf et al.
patent: 2248160 (1941-07-01), Crawford
patent: 2727576 (1955-12-01), Hall
patent: 2728399 (1955-12-01), Kluck
patent: 2738019 (1956-03-01), Atkinson
patent: 2944603 (1960-07-01), Baker et al.
patent: 3055432 (1962-09-01), Park

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