Well centralizer and method of making

Wells – Processes

Patent

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Details

166241, E21B 1710

Patent

active

040774708

ABSTRACT:
A well centralizer and method of making having axially spaced collars for attachment about a casing and a plurality of outwardly bowed elements connected to each collar. Each end of the bows has a generally U-shaped offset which is connected in a circumferential opening in a collar and a locking tab extends from the collar inside of the offset and extends through the collar opening between the bow offset and the collar and locks the offset in the collar opening. The axial portions of the collar on each side of the opening are radially recessed outwardly for receiving one end of the bowed element and the length of the locking tab is sufficiently long to extend through the opening and engage the outside of the collar to firmly and securely lock the bow in place and maintain a consistent internal diameter of the centralizer collar. The collars and bows are easily assembled in the field by insertion of the bow ends into the collar and pressing the free end of each locking tab about a bow end.

REFERENCES:
patent: 3356147 (1967-12-01), Dreyfuss

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